JP2000221075A - Calibration method of weighing device and powder and granular material feed device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly measure weight even in weighing a powder and granular material feed device connected with flexible pipes or the like by detaching all the flexible bodies from a device to be measured, measuring the weight to obtain the reference weight, and thereafter connecting the flexible bodies to the device to be measured one by one to regulate the fixed positions. SOLUTION: The upper part of the dispersion chamber 48 of a microaddition device 40 is to an intake air pipe 52, the lower part of the dispersion chamber 48 is to a feed pipe 51, respectively connected. At weighing, at first all the pipings and electric cables and the like connected to the microaddition device 40 are detached to measure the weight by a weighing device 70, and the reference weight is obtained. Next, the pipes, the electric cables or the like are connected to the microaddition device 40 one by one, fixed by a fixing means 60 and bulkhead joints 68, further regulated to the positions so that the displayed weight of the weighing device 70 becomes the reference weight or the allowable set range. In this way, all the pipings are in order similarly adjusted and fixed on the positions, and hence influence of disturbance on weighing is excluded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a method for calibrating a weighing device and a powder and granular material supply device utilizing the method for calibrating the weighing device. A weighing device that can properly measure the weight of the granular material supply device, that is, the weight of the supplied granular material, by minimizing the effect of flexible piping and electric cables on the weight measurement of the granular material supply device The present invention relates to a calibration method and a granular material supply device.

[0002]

2. Description of the Related Art As a weighing device, a total weight of a device to be measured and contents stored in the device to be measured is measured, and a change in the measured total weight is regarded as a change in the weight of the contents. It has been known. In such a weighing device,
In many cases, pipes, electric cables, and the like connected to the device under test are connected to the outside by a flexible body. In particular, the flexible body has a relatively high elastic repulsion. In the case of a cable, the apparent weight of the device to be measured changes due to the elastic repulsion of the flexible piping and the electric cable, and it has often been impossible to measure the weight accurately.

[0003] For example, flour for school lunches has a weight of 25k.
In some cases, several tens to hundreds of ppm of a powder such as a nutrient substance may be added to a large bag of flour. As an example, the addition of the nutrient substance is performed by supplying a nutrient substance to the powder and particle filling and packaging apparatus that fills the packaging bag with the flour by using a microparticle addition apparatus (supply apparatus). Done by

[0004] In the production of bagged products of such granular materials to which such additives have been added, in order to stably produce standards-compliant products, the amount of additives to be added to flour or the like must be properly determined. There is a need. As this method, there is exemplified a method of measuring the weight of the entire micro-addition apparatus including the additive during the supply, and grasping the addition amount by reducing the weight. To do so, a micro-addition device weighing more than 20 kg (device to be measured)
In addition, a few kg of additives such as nutritional substance powder are stored, and a micro-addition device storing the additives is placed on a weighing device,
It is necessary to measure a change in weight of about 5 g to 10 g of the additive such as the added nutritional substance powder based on the change in the total weight.

[0005] However, a pipe and an electric cable for transporting powder and granules are connected to the micro-addition apparatus from the outside.
In addition, since these pipes and electric cables may have a large elastic repulsive force, sufficiently follow changes in several g of additives such as nutritional substance powders to be sent out to be added to flour. In some cases, a large error may occur in the measurement of the change in the total weight (addition amount of the additive) of the minute addition device measured by the weighing device.

[0006] Such a weight fluctuation of 1 g or less in the weighing device easily occurs even when a small force is applied to the micro-addition device from outside, and the weight is changed from the micro-addition device to the outside. If the flexible pipe or electric cable has a certain degree of elastic repulsion, it easily occurs even if the radius of curvature slightly changes or the mutual contact position fluctuates. In addition, in some cases, the change in weight also occurs due to a change in hardness of a pipe or a coating of an electric cable caused by a change in air temperature, or a change in internal pressure of an air pipe.

[0007]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above findings, and a measurement object connected to the outside by a flexible pipe or an electric cable having a relatively high elastic repulsive force. Even if it is a device, the influence of these flexible bodies on the weight measurement result of the device to be measured can be minimized. Even when supplying the weighing device, the calibration method of the weighing device, and the calibration method of the weighing device, which can properly measure the total weight of the microparticulate material supply device to grasp the supply amount of the granular material The object of the present invention is to provide a powdery and granular material supply device utilizing the above.

[0008]

In order to solve this problem, a method for calibrating a weighing device according to the present invention comprises a device to be measured externally connected by a flexible body and contents stored in the device to be measured. A weighing device that measures the weight of the device to be measured, wherein the content is stored and the total weight of the device to be measured is measured,
In a weighing device with a change in the measured total weight as a change in the weight of the contents, remove all the flexible bodies from the device to be measured, and measure the weight of only the device to be measured by the weighing device, Obtaining a reference weight of the weighing device from the measurement result; and connecting the flexible body to the device to be measured, and a position where a value measured by the weighing device falls within a predetermined range set according to the reference weight. Adjusting the fixing position of the flexible bodies one by one, and connecting all the flexible bodies to the device to be measured. A method for calibrating a weighing device is provided.

In the calibration method of the present invention, the fixing position of the flexible body in the mounting adjustment step is adjusted by using a fixing means for holding the flexible body in a substantially horizontal state, and the fixing means is moved in a vertical direction. This is preferably done by moving to

[0010] Further, the granular material supply device of the present invention has a transfer means for transporting the granular material by a screw feeder and a transport means for pneumatically transporting the granular material transported by the transport means. Powder and granule supply means connected to the outside by means of, weighing means for measuring the weight of the powder and granule supply means, and fixing a flexible body connected to the powder and granule supply means in a substantially horizontal state, Fixing means capable of adjusting the position of the substantially horizontal flexible body in the vertical direction; and adjusting the position of the fixing means in the vertical direction to reduce the influence of the flexible body on the weighing means. A powder and granular material supply device is provided.

[0011] Further, the above-mentioned granular material supply means may include an additive to be added to the granular material to be bagged by the granular material filling and packaging apparatus,
It is preferable that the powder and granule supply means is supplied to the powder and particle filling and packaging apparatus, and the powder and particle supply means has a total weight of its own weight and the total filling amount of the powder and granules exceeding 20 kg, and 2 for 1 bag by granule filling and packaging equipment
It is preferable that a powdery material of 0 g or less be supplied as an additive, and the fixing means bends the flexible body extending in a vertical direction and holds the flexible body in a substantially horizontal state. Is preferred.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a calibration method for a weighing device and a powder and granular material supply device according to the present invention will be described with reference to the drawings.
FIG. 1 shows a filling and packaging machine in which a micro-addition device to which the present invention is suitably applied is mounted on a weighing device. On the right side, a micro-addition device 40 and a weighing device 70 are shown. Further, FIG. 2 is a detailed view showing a tip portion of the trace amount adding device 40,
3 is an AA line view of FIG. 2 showing an example of the shape of the dispersion blade 47, FIG. 4 is a BB line view of FIG. 1 showing a fixing device of the flexible body, and FIG. FIG. 4C showing details of the fixing device of the flexible body.
FIG.

In a fixed quantity bagging apparatus 10 shown in FIG. 1, a powder storage unit 11 is provided at an upper portion for storing and sequentially supplying flour as a powder, and a powder storage portion 11 is provided at a lower portion thereof. A transfer bagging unit 12 is provided for transferring the flour supplied from the unit 11 in fixed amounts and filling the packing bag. The storage unit 11 and the transfer bagging unit 12 are connected to each other by a connecting unit 13 and are placed on the legs 14. In addition, an additive supply port 53 to which the additive supplied from the trace amount adding device 40 is supplied is disposed in the connecting portion 13.

A hopper 20 for storing flour is provided at the uppermost portion of the granular material storage section 11, and a plurality of stirring blades 21 for stirring the flour to prevent the occurrence of bridges are provided below the hopper 20. The mounted stirring shaft 22 is disposed, and further below the stirring shaft 22, the flour is transferred and bagged.
2 is provided with a screw conveyor 23 for feeding. The stirring shaft 22 and the screw conveyor 23 are connected to each other by a conduction means 24 such as a V-belt, and are rotationally driven via a conduction means 26 by a drive motor 25 provided at the lower end of the leg 14.

On the other hand, a screw feeder 30 is provided in the transfer bagging section 12 provided below the granular material storage section 11 and connected by the connecting section 13, and the rotation of the screw feeder 30 removes flour. A predetermined amount (for example, 25 kg) of flour is filled into the packaging bag 33 which is transferred toward the filling port 31 and is pushed out of the filling port 31 and placed on the measuring device 32.

The screw feeder 30 is rotated at a high speed to fill a large amount of flour into the packaging bag 33 in a short time, and at a low speed to discharge a large amount of flour while controlling the amount of flour. Yes, first, most of the flour to be filled in the packaging bag 33 is filled with a large dispenser, and then, while weighing the flour filled with the weighing device 32, the insufficient flour is filled with a small dispenser, and in about 10 seconds in total, 25k
g of flour is accurately weighed and filled into the packaging bag 33.

The screw feeder 30 is provided with a variable speed motor 3 provided inside the leg 14 and having a controllable rotation speed.
The rotation of the screw feeder 30 is automatically controlled so that the screw feeder 30 rotates at a predetermined rotation speed by the rotation of the screw feeder 30 by the detection device 36.

The micro-addition device 40 for supplying additives to the fixed-quantity bagging device 10 is a pressure vessel as a whole, and is provided with an airtight hopper 42 at an upper end portion and a plurality of stirring blades 43 at a lower portion thereof. The additive storage section 41 in which the stirring shaft 44 equipped with is disposed, and the additive transfer section 4 having a screw feeder 46 below the additive storage section 41.
5 and a downstream dispersion chamber 48 are provided. Further, the micro-addition device 40 is mounted on a weighing device 70 for measuring the total weight of the device 40 to determine the amount of the additive 40 added.

The additives such as nutrient substance powder transferred by the screw feeder 46 fill the space between the end of the screw feeder 46 and the dispersion blade 47, and are further dispersed by the additives transferred by the screw feeder 46. Is extruded from the gap of
8 is sent.

Here, as shown in FIG. 3, the dispersion blades 47 are formed by radially forming gaps on a disk. Therefore, the end of the screw feeder 46 and the dispersion blade 47
The additive filled in the space between them is gradually pushed out from the gap of the dispersion blade 47 by the pressure of the subsequent additive transferred by the screw feeder 46, so that the pulsating supply inherent to the screw feeder is prevented. The additive can be stably extruded by a fixed amount and delivered to the dispersion chamber 48.

The additive delivered to the dispersion chamber 48 is dispersed in the air stream by the compressed air flowing from top to bottom in the dispersion chamber 48 as shown by the arrow in FIG. The connecting portion 13 of the fixed quantity bagging device 10 through 51
Is added to the flour in the connecting portion 13 through an additive supply port 53 provided in the connection portion 13.

The compressed air from the compressor 55 is supplied to the dispersion chamber 48 and the airtight hopper 42 by the air supply pipe 52 and the air supply pipe 54 branched from the air supply pipe 50.
The supply pipe 51 is a pipe that sends a mixed gas flow of the compressed air and the additive from the dispersion chamber 48 to the additive supply port 53 provided in the connecting portion 13. In addition, P in the figure is a pressure gauge for measuring the internal pressure of the airtight hopper 42 and the compressor 55. In the illustrated example, the balance between the pressure in the airtight hopper 42 and the pressure in the dispersion chamber 48 is maintained by the valves 52a and 54a provided in the air supply pipe 52 and the air supply pipe 54. Here, the airtight hopper 42 and the dispersion chamber 48
The internal pressure is preferably the same or slightly higher in the hermetic hopper 42 in order to prevent backflow of the additive.

The screw feeder 46 is rotated at the same timing as the screw feeder 30 of the fixed quantity bagging device 10 by a transmission means 57 connected to a transmission means 56 fixed to a rotating shaft of a drive motor (not shown). Then, an additive in an amount proportional to the supply amount of the flour is added to the flour of the connecting portion 13 through the additive supply port 53. Also,
The stirring shaft 44 on which the stirring blade 43 is mounted is similarly rotated by the transmission means 58 connected to the transmission means 56 to prevent the formation of a bridge of the additive in the airtight hopper 42.

The additive added to the flour of the connecting portion 13 in this way is added only to the flour at the mouth of the additive supply port 53. Thereafter, the flour is stirred and mixed by the screw feeder 30, and is uniformly mixed. Since the mixture is filled into the packaging bag 33 from the filling port 31 of the transfer bagging section 12, the flour in which the additive is uniformly mixed in all parts of the packaging bag 33 can be obtained.

The micro-addition device 40 is mounted on a weighing device 70 as a whole, and each time at least one packing bag 33 is filled with flour, the micro-addition device 40 containing an additive is added.
Is measured, and the weight of the additive added to the flour and consumed is measured as a decrease in the total weight of the micro-addition device 40. Each time the packaging bag 33 is filled with the flour, the amount of the additive added to the flour in the packaging bag is measured, and at least one of the display and the recording is performed. In addition,
The supply amount of the attachment is increased or decreased by increasing or decreasing the rotation speed of the screw feeder 46 of the minute amount adding device 40.

As shown in FIG.
An air supply pipe 52 is connected to an upper part of the dispersion chamber 48, and a supply pipe 51 is connected to a lower part of the dispersion chamber 48. FIG.
The air supply pipe 54 is connected to the top of the airtight hopper 42 as shown in FIG.

In the micro-addition apparatus 40, a supply pipe 51 and an air supply pipe 52 are connected to the dispersion chamber 48, and an air supply pipe 54 is connected to the top of the airtight hopper 42. Further, the screw feeder 46 and the stirring shaft 44 are rotated by a drive motor having the transmission means 56. Therefore, at least the supply pipe 51 and the air supply pipe 5
An electric cable for connecting each pipe of the air supply pipe 2 and the supply pipe 54 and a drive motor to a power supply is connected to the outside. For these pipes, flexible pressure-resistant hoses having relatively high elastic repulsion, such as netted vinyl tubes, are used.On the other hand, vinyl cabtire cables, etc., are used for electric cables. Are flexible but have relatively high elastic repulsion.

In the micro-addition apparatus 40 utilizing the present invention, these pipes, electric cables, and the like are not brought into contact with each other on the micro-addition apparatus 40 side than the partition joint 68 described later, and they are mutually connected by vibration or the like. Is fixed at a position where it does not come into contact with or does not change the radius of curvature.

That is, as shown in FIG.
Is connected to the upper part of the dispersing chamber 48 using an elbow, and the supply pipe 51 is connected to the lower part of the dispersing chamber 48 so as to hang down without contacting each other and naturally. In addition, the air supply pipe 54
Also, by using an elbow similarly to the air supply pipe 52, it is connected to the top of the airtight hopper 42 so as not to be in contact with other pipes and to hang down naturally. In this case,
Instead of using an elbow, the connection may be made such that the air supply pipe 52 and the air supply pipe 54 hang down naturally by bending.

Supply pipe 51, air supply pipe 52, and air supply pipe 54
Is fixed by a fixing means 60 below the dispersion chamber 48. The fixing means 60 curves the pipe (and the electric cable or the like) in a sufficiently large and smooth circular arc to be in a horizontal (or substantially horizontal) state, and fixes (holds) the pipe at the horizontal portion. This fixing means 60
Is a slide block 61 and the slide block 6
1. A moving means comprising a screw 62 screwed into the screw 1 and a support block 63 for supporting the screw 62. The moving means is capable of moving the slide block 61 in the vertical (vertical) direction by rotating a knob 64 fixed to the screw 62. It is fixed to 65.

The moving means 65 for moving the fixing means 60 in the vertical direction is provided with a gantry 66 on which the weighing device 70 for measuring the total weight including the stored additive is mounted on the micro-addition device 40. The mounting plate 67 is fixed to the mounting plate 67. Further, the extended portions of the supply pipe 51, the air supply pipe 52, and the air supply pipe 54 that have passed through the respective fixing means 60 are attached to the mounting plate 67 by a partition joint 68 (the partition joint of the air supply pipe 52 is omitted in FIG. 4). As shown in FIG. 1, the supply pipe 51 is fixed to the additive supply port 53, and the air supply pipe 52 and the air supply pipe 54 are connected to the compressor 5 through the air supply pipe 50.
5 is connected.

The fixing of the supply pipe 51, the air supply pipe 52, the air supply pipe 54 and the like by the fixing means 60, and the fixing of a flexible body connected to the outside such as an electric cable are basically as follows. It is done. First, the trace addition device 4
From 0, remove all pipes, electric cables, and the like connected to an external device or the like, put only the micro-addition device 40 on the weighing device 70, measure the weight at this time, and reset this weight, for example, Then, this zero is set as the reference weight.

Next, a mounting adjustment step is performed. That is, one pipe or electric cable is connected to the micro-addition device 40, bent from the hanging state to the horizontal state as described above, fixed by the fixing means 60 and the partition joint 68, and further fixed by the moving means 65. The position of 60 is moved in the vertical direction, and adjusted and fixed at a position where the weight displayed on the weighing device 70 becomes the reference weight. Alternatively, it is adjusted and fixed at a position within a predetermined range set according to the reference weight. When the adjustment of the flexible body such as the first pipe and the fixing of the position are completed, the same operation is performed on the next pipe and the like, and thereafter, the same adjustment and position fixing are sequentially performed one by one. The flexible body is connected to the small amount adding device 40.

In the micro-addition device 40 using the screw feeder, the supply amount of the granular material can be controlled by the capacity, so that the supply amount of the granular material can be controlled very accurately.
However, when a pipe or an electric cable is fixed to a device to be measured such as the micro-addition device 40, the elastic repulsion and weight due to bending of the pipe or the electric cable, the force applied to the pipe or the like from the outside, and the resulting curvature Changes, etc.
These are collectively referred to as disturbances), which affects the measurement results obtained by the weighing device 70, so that accurate weight measurement cannot be performed. In particular, in the micro-addition device 40 as shown in the figure, the total weight exceeds 10 kg when the additive is filled, and the amount of the additive is usually 10 g per bag.
Because of this, even a slight measurement error due to disturbance greatly reduces accuracy, and although the supply amount of the granular material is accurate,
It is difficult to quickly and properly grasp the amount of the additive during the bagging operation of each bag by the fixed amount bagging device 10 or the like.

On the other hand, in the present invention, when connecting a flexible body connected to the outside, such as a pipe, to the small amount adding device 40 or the like, the position of the fixing means 60 is moved up and down by the mounting adjustment step. By moving the weighing device 70 so that the measured value matches the reference weight, the disturbance to the weighing device 70 due to each pipe or the like can be eliminated or the disturbance can be minimized. As a result, the disturbance can be reduced. The influence on the measurement of the total weight of the device to be measured by the method can be minimized. Therefore, even when the total of the additive and its own weight is 20 kg or more as shown in the illustrated example and 20 g or less, for example, 5 g of the granular material is supplied as an additive to one bag, the accurate It is possible to measure the total weight of the minute amount measuring device 40, that is, the weight of the additive.

The pipes and the electric cables are fixed to the fixing means 6.
Since it is fixed to the partition joint 68 which is fixed to the gantry 66 (mounting plate 67) on which the weighing means 70 is mounted on the outer side (with respect to the minute amount measuring device 40) of the outside of the pipe, piping and the like outside of this (External force) does not affect the inner side of the fixing means 60, and therefore does not affect the measurement result by the weighing means 70. However, the pipes and the like can be sufficiently firmly fixed by the fixing means 60, and when there is no or extremely little external force due to pipes and the like outside of the pipes, the partition joint 68 and the like are not provided outside the fixing means 60. Is also good. That is, in the present invention, even if the pipes and the like outside the fixing means 60 are moved, the external force does not affect the pipes and the like inside the fixing means 60, and therefore, does not affect the measurement result by the weighing means 70. (Or the effect is extremely small).

The order of connecting the pipes and the electric cables is not particularly limited, but preferably, the pipes and the electric cables having a relatively high elastic repulsion are connected, and then the pipes and the electric cables having a small elastic repulsion are connected. . In addition, even if the pipe or the electric cable moves the fixing means in the vertical direction, the weight displayed on the weighing device 70 hardly changes, and when the elastic repulsion is small, sufficient slack is given. May be fixed at any position.

After connecting all the pipes and electric cables as described above, the hermetic hopper 42 is filled with additives such as nutrient substance powder, and the total weight of the trace amount adding device 40 is measured by the weighing device 70. In the following, the amount of the supplied additive can be measured by reducing the total weight.

In the above example, the fixing means 60 for pipes and electric cables and the moving means 65 for adjusting the position thereof are
The gantry 66 on which the weighing device 70 is placed, that is, the weighing device 7
Although it is fixed at a position where no weight load is applied to the measurement according to 0, the present invention is not limited to this, and the rigid portion on the weighing device 70 or the rigid portion fixed to this rigid portion Member, furthermore, a member placed on the weighing device 70, etc.
Piping or electric cable fixing means 60 and moving means 6
5, furthermore, a pipe, a fixing portion of an electric cable, and the like may be arranged. Even with this configuration, if the external force due to the piping or the electric cable does not affect the inside of the fixing unit 60 and does not apply a heavy load to the measurement by the weighing unit 70,
Accurate weight measurement can be performed.

FIG. 6 shows an example. In the example shown in FIG. 6, the mounting plate 72 is fixed to the airtight hopper 42 of the small amount adding device 40 placed on the weighing device 70, and two moving means 65 are fixed to the mounting plate 72. The air supply pipe 52 and the air supply pipe 54 are (horizontally) horizontally fixed by the fixing means 60 fixed to the moving means 65.
In addition, the air supply pipe 52 and the air supply pipe 54 are fixed to a rigid portion having a fixed position outside the fixing means 60 so as not to apply a heavy load to the measurement by the weighing device 70. For example, a stay extending upward may be attached to the gantry 66, and the air supply pipe 52 and the air supply pipe 54 may be fixed to the stay using a partition joint or the like.

In the example shown in FIG. 6, the air supply pipe 54 may be attached in the same manner as in the above-described example. On the other hand, the air supply pipe 52 is attached at a predetermined position in the dispersion chamber 48, and then is moved from the vertical direction to the horizontal direction.
Is curved with a sufficient curvature, and the air supply pipe 52 is fixed by the fixing means 60 at the horizontal position. Thereafter, in the same manner, the position is adjusted by moving the fixing means 60 up and down by the moving means 65, and is fixed at a position where the weight displayed on the weighing device 70 becomes the reference weight (predetermined range).

In this embodiment, the weighing value may be disturbed at the time of adjustment by the moving means 65 in the mounting adjustment process. However, after the adjustment is completed, the weighing device 70 is connected to the weighing device 70 by each pipe or the like as in the above-described example. The disturbance can be eliminated or the disturbance can be minimized. Further, by fixing with a partition joint or the like outside the fixing means 60, external force is reduced.
Since there is no influence on the inner side and therefore no influence on the measurement by the weighing device 70, accurate weight measurement is possible.

FIG. 7 shows another embodiment of the present invention. In the embodiment shown in FIG. 7, the mounting plate 80 is fixed to the outer wall surface of the airtight hopper 42 in a state of hanging therefrom.
The fixing means 60 and the moving means 65 for the pipes and the electric cables are fixed to them. Therefore, the mounting plate 80 and the fixing means 6
0 and the like are in a state of being placed on the weighing device 70.
In this embodiment, a substantially L-shaped fixing plate 82 is fixed to the gantry 66, and piping and the like are fixed to the fixing plate 82 outside the fixing means 60 by using a partition joint 68. In this embodiment, connection and adjustment of the piping and the like may be performed according to the embodiment shown in FIG. Also in this embodiment, the weight value may be disturbed at the time of adjustment by the moving means 65 in the mounting adjustment process, but after the adjustment is completed, accurate weight measurement can be performed as in the previous example. .

FIG. 8 shows another embodiment of the present invention. In the embodiment shown in FIG. 8, a fixing plate 84 is fixed to the outer wall surface of the airtight hopper 42 in a state of hanging therefrom, and a vertical plate 84a fixed vertically to the fixing plate 84 is provided. The piping is fixed using a partition joint 68. Further, a mounting plate 86 is fixed to the gantry 66, and the mounting plate 86
Then, the moving means 65 for holding the fixing means 88 is attached. Here, in the illustrated example, the fixing means 88 is a vertical plate fixed vertically to the slide block 61 of the moving means 65, and the piping and the like are fixed to the fixing means 88 which is the vertical plate by the partition joint 68. The vertical plate, that is, the partition joint 68 itself is moved by the moving means 65 to perform adjustment in the mounting adjustment process. In this embodiment, connection and adjustment of the piping and the like may be performed in accordance with the embodiment shown in FIG.

According to the present embodiment, although a part of the pipe or the like is fixed to the portion that affects the weighing means 70, the measured value of the weighing means 70 may not be disturbed during the adjustment by the moving means 65 as described above. Absent. Further, since the pipes and the like are fixed to the fixing means 88 using the partition joint 68, the external force does not affect the weight measurement by the weighing device 70.

In the example shown in FIGS. 6 to 8, the mounting plate 72 and the like are fixed to the airtight hopper 42,
0, the moving means 65, the partition joint 68 (fixed portion such as a pipe) and the like are fixed, but the present invention is not limited to this, and various configurations can be used. For example, the airtight hopper 42
Alternatively, the moving means 65 may be directly fixed, or
The moving means 65 may be fixed to a rigid portion such as a frame attached to the airtight hopper 42.

[0047]

EXAMPLE FIG. 9, FIG. 11 and FIG. 12 show data in the case where powders are actually sent out by a powders supply device (small amount adding device).

As shown in FIG. 10, the data of FIG. 9 shows that the additive delivered from the micro-addition device 75 same as the micro-addition device 40 shown in FIG. The amount of the additive delivered each time is stored in the container 7.
7 is a graph plotted by measuring with a weighing device 78 on which a sample 7 is placed. In this example, the additive was delivered in 10 seconds with the target value being 10.5 g. As is clear from the graph of FIG. 7, the amount of the additive delivered from the micro-addition device 75 was very stable. The average value is 10.50 g and the standard deviation is 0.28 g with respect to the delivery amount of the target value of 10.5 g.

The graphs of FIGS. 11 and 12 show that the same micro-addition device 75 is placed on a weighing device, and when the same granular material is delivered, the weighing device weighs the micro-addition device 75. FIG. 11 shows an example in which the present invention is adopted, that is, an example in which pipes and electric cables are connected as described above, and FIG. 12 shows a conventional example which does not employ the present invention. It is an example.

As shown in FIG. 12, in the conventional measurement, the average value of the delivery amount with respect to the delivery amount of the target value of 10.5 g is 10.35 g, and the standard deviation is 1.43 g. Is transmitted with relatively high accuracy, but the standard deviation has reached just over five times the standard deviation calculated from the actual transmission amount described above. This increase in standard deviation clearly indicates that the display of the weighing device contains large errors. On the other hand, according to the present invention, as shown in FIG. 11, the average value of the delivery amount has reached the target of 10.50 g, and the standard deviation is 0.89 g. The standard deviation is about 60% as compared with the experimental example of FIG.
Also, as is clear from the graph of FIG. 11, the amount of transmission is far from the average value only in the first few times,
If this is excluded as a transient phenomenon at the start of operation, it is clear that the standard deviation when the present invention is employed is further reduced.

[0051]

Since the present invention is constructed as described above, even if the device to be measured is connected to the outside by a flexible pipe or electric cable having a relatively high elastic repulsion, Disturbance due to little change in the measured value of the weighing device, for example, even when measuring the total weight of a small amount of addition device that supplies a small amount of additives to a fixed amount bagging device and the like for quantitatively bagging flour, Make accurate measurements,
The supply amount of the additive can be properly grasped.

[Brief description of the drawings]

FIG. 1 shows a conceptual diagram of an example of a fixed quantity bagging apparatus utilizing the present invention.

FIG. 2 is a detailed view showing a tip portion of the small amount adding device.

FIG. 3 is a view taken along line AA of FIG. 2 showing an example of the shape of the dispersion blade.

FIG. 4 is a view taken along line BB of FIG. 1 showing the fixing device of the flexible body.

5 shows the details of the fixing device of the flexible body. FIG.
FIG.

FIG. 6 is a view showing another example of a fixing device for a flexible body according to the present invention.

FIG. 7 is a view showing another example of a fixing device for a flexible body according to the present invention.

FIG. 8 is a view showing another example of the flexible body fixing device according to the present invention.

FIG. 9 is a graph showing the amount of additive delivered from the micro-addition device.

FIG. 10 is a conceptual diagram showing a configuration of an experimental device in the experiment of FIG.

FIG. 11 is a graph showing measured values of the weighing device according to the present invention.

FIG. 12 is a graph showing measured values of a conventional weighing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Quantitative bagging apparatus 11 Granule storage part 12 Transfer bagging part 13 Connecting part 14 Leg 20 Hopper 21 Stirrer blade 22 Stirrer shaft 23 Screw conveyor 24, 26 Conducting means 25 Drive motor 30 Screw feeder 31 Filling port 32 Metering device 33 Packaging bag 34 Variable speed motor 35 Conducting means 36 Detecting means 40 Micro-addition device 41 Additive storage unit 42 Airtight hopper 43 Stirrer blade 44 Stirrer shaft 45 Additive transfer unit 46 Screw feeder 47 Dispersion blade 48 Dispersion chamber 50, 55 Air pump 51 Supply pipe 52, 54 Air supply pipe 53 Additive supply port 54 Air supply pipe 55 Compressor 56, 57, 58 Conduction means 60 Fixing means 61 Slide block 62 Screw 63 Support block 64 Knob 65 Moving means 66 Mounting base 67, 72, 80, 86 Mounting Board 68 Partition wall joint 70 Weighing device 75 Micro addition device 76 Piping 77 Storage container 78 Weighing device 82,84 Fixing plate

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F046 AA00 AA01 BA09 BA11 BB02 EA02 3F075 AA08 BA02 BB01 CA04 CA09 CB01 CB04 CC03 CC05 CC09 CC15 CC19 DA04 DA30 4G068 AA02 AB22 AC11 AC17 AD33 AD45

Claims (6)

[Claims] 1. A device to be measured connected to the outside by a flexible body and a weighing device for measuring the weight of the content stored in the device to be measured, wherein the device to be measured in which the content is stored In a weighing device that measures the total weight of the sample and determines the change in the measured total weight as the change in the weight of the contents, the flexible device is entirely removed from the device to be measured, and the device to be measured is measured by the weighing device. Measuring the weight of only the weight, and obtaining a reference weight of the weighing device from the measurement result, connecting the flexible body to the device to be measured, and the measured value by the weighing device is set according to the reference weight. Adjusting the fixing position of the flexible body to a position within the predetermined range, and performing a flexible body attachment adjusting step of connecting all the flexible bodies to the device to be measured. Calibration of weighing device characterized by having Law. 2. The fixing position of the flexible body in the mounting adjustment step is adjusted by using a fixing means for holding the flexible body in a substantially horizontal state, and moving the fixing means in a vertical direction. 2. The calibration method of the weighing device according to 1. 3. A supply of powder and granules connected to the outside by a flexible means, comprising a transfer means for transferring the powder and granules by a screw feeder and a transport means for pneumatically transporting the powder and granules conveyed by the transfer means. Means, weighing means for measuring the weight of the granular material supply means, and fixing the flexible body connected to the granular material supply means in a substantially horizontal state, the position of the flexible body in the substantially horizontal state Having a vertically adjustable fixing means, by adjusting the position of the fixing means in the vertical direction,
An apparatus for supplying a granular material, wherein the influence of the flexible body on the weighing means is reduced. 4. The powder and granular material supply means supplies the additive to be added to the powder and granular material packed in the bag with the granular material filling and packaging device to the powder and granular material filling and packaging device. 4. The powder and granular material supply device according to 3. 5. The method according to claim 1, wherein the powder material supply means has a total of its own weight and a total filling amount of the powder material of more than 20 kg, and the bagging device packs and packs two bags.
The powder and granular material supply device according to claim 4, wherein the powder and granular material of 0 g or less is supplied as an additive. 6. The granular material supply device according to claim 3, wherein said fixing means curves and holds said flexible body extending in a vertical direction in a substantially horizontal state.