JP3881123B2 - Weighing device calibration method and granular material supply device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a calibration method of a weighing device and a granular material supply device using the calibration method of the weighing device, and in particular, a flexible pipe or an electric cable connected to the granular material supply device. Of weighing apparatus and powder that can properly measure the weight of the powder supply device, that is, the weight of the supplied powder, by eliminating the influence of the powder on the weight measurement of the powder supply device to the maximum It relates to a supply device.
[0002]
[Prior art]
As a weighing device, there is known a weighing device that measures the total weight of the device to be measured and the contents stored in the device to be measured, and uses the change in the measured total weight as the change in the weight of the content. .
In such a weighing device, piping and electric cables connected to the device under test are often connected to the outside by a flexible body, and in particular, this flexible body has a relatively high elastic repulsion force. In the case of flexible pipes and electrical cables, the apparent weight of the device under test often changes due to the elastic repulsion of the flexible pipes and electrical cables, and accurate weight measurement often fails. It was.
[0003]
For example, flour for school meals may be added with several tens of ppm to several hundreds of ppm of nutrients or the like with respect to 25 kg of large bag flour. As an example, the addition of the nutrient substance is to supply the nutrient substance to the powder-filling packaging device that fills the packaging bag with the flour using a minute-particle addition device (feed device) of the powder and granule. Is done by.
[0004]
In order to stably manufacture standard-compliant products in the manufacture of powdered products with such additives, it is necessary to properly grasp the amount of additive added to the flour. . As this method, a method of measuring the weight of the whole micro-addition apparatus including the additive during supply and grasping the added amount by reducing the weight is exemplified.
For that purpose, several kg of additives such as nutrient powders are stored in a micro-adding device (device to be measured) with a weight exceeding 20 kg, and the micro-adding device containing this additive is placed on the weighing device. Depending on the change in the total weight, it is necessary to measure the weight change of about 5 g to 10 g of the additive such as the added nutrient powder.
[0005]
However, this micro-adding device is connected to the pipes and electric cables for transporting the granular material from the outside, and these pipes and electric cables may have a large elastic repulsion. Changes in the total weight of a micro-addition device measured by a weighing device (additives) may not be able to sufficiently follow changes in several grams of additives such as nutrient powders delivered to be added to wheat flour In some cases, a large error may occur in the measurement of the amount of addition.
[0006]
Such a change in weight of 1 g or less in the weighing device is easily caused even if a slight force is applied to the micro-adding device from the outside, and the flexibility is connected to the outside from the micro-adding device. If a flexible pipe or electric cable has a certain amount of elastic repulsion, it can be easily caused by a slight change in the radius of curvature, a change in the mutual contact position, or the like.
In some cases, the variation in weight is also caused by a change in the hardness of the pipe, a change in the hardness of the covering of the electric cable, or a change in the internal pressure of the air pipe caused by a change in temperature.
[0007]
[Problems to be solved by the invention]
The present invention has been made on the basis of such knowledge. Even a device to be measured connected to the outside by a flexible pipe or an electric cable having a relatively high elastic repulsion force can be used. The influence that the flexible body has on the weight measurement result of the device to be measured can be minimized, for example, even when supplying a granular material of 20 g or less from a microscopic granular material supply device having a total weight exceeding 20 kg, A calibration method for a weighing device, which can properly measure the total weight of a microscopic particle supply device and grasp the supply amount of the granular material, and a powder supply device using the calibration method of the weighing device It is to provide.
[0008]
[Means for Solving the Problems]
  In order to solve this problem, a calibration method for a weighing device according to the present invention is a measuring device connected to the outside by a flexible body and a weighing device for measuring the weight of contents stored in the measuring device. And measuring the total weight of the device to be measured in which the contents are stored, and taking the change in the measured total weight as the change in the weight of the content, from the device to be measured to the flexible body And measuring 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, connecting the flexible body to the device to be measured, and measuring the weighing Adjusting the fixed position of the flexible body to a position where the measured value by the apparatus is within a predetermined range set according to the reference weight is performed for each flexible body, and all the flexible bodies are measured. Installation adjustment work for flexible body connected to the device Yes the doorThen, the adjustment of the fixing position of the flexible body in the attachment adjusting step is performed by using fixing means for holding the flexible body in a substantially horizontal state and moving the fixing means in the vertical direction.A calibration method for a weighing apparatus is provided.
[0010]
Moreover, the granular material supply apparatus of the present invention has a transporting means for transporting the granular material by a screw feeder and a transporting means for pneumatically transporting the granular material conveyed by the transporting means. The substantially horizontal state in which the connected powder body supply means, the weighing means for measuring the weight of the powder body supply means, and the flexible body connected to the powder body supply means are fixed in a substantially horizontal state. Fixing means that can adjust the position of the flexible body in the vertical direction, and adjusting the vertical position of the fixing means to reduce the influence of the flexible body on the weighing means. A granular material supply apparatus is provided.
[0011]
The powder supply means preferably supplies an additive added to the powder packed in the powder filling and packaging apparatus to the powder filling and packaging apparatus. The powder supply means has a total weight of more than 20 kg with its own weight and the total filling amount of the granular material, and 20 g or less of the granular material with respect to one bag packed by the granular material filling and packaging apparatus. The body is preferably supplied as an additive, and the fixing means is preferably configured to bend the flexible body extending in the vertical direction and hold it in a substantially horizontal state.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a calibration method for a weighing device and a powder and particle 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 microscopic addition device to which the present invention is suitably applied is placed on a weighing device. On the left side of the figure is a quantitative bagging device 10 which is a powder filling and packaging device. On the right side, a trace addition device 40 and a weighing device 70 are shown. 2 is a detailed view showing the tip portion of the trace addition device 40, FIG. 3 is a view taken along the line AA of FIG. 2 showing an example of the shape of the dispersion blade 47, and FIG. 4 is a flexible body fixing device. FIG. 5 is a view taken along the line B-B in FIG. 1 and FIG. 5 is a view taken along the line C-C in FIG. 4 showing the details of the flexible fixing device.
[0013]
The fixed-quantity bagging apparatus 10 shown in FIG. 1 is provided with a powder storage unit 11 for stocking and sequentially supplying wheat flour, which is powder, and supplied from the powder storage unit 11 to the lower part thereof. A transfer bag filling unit 12 is provided for transferring a certain amount of the wheat flour and filling the packaging bag. And the granular material storage part 11 and the transfer bagging part 12 are mutually connected by the connection part 13, and are mounted on the leg part 14. As shown in FIG.
In addition, an additive supply port 53 to which the additive supplied from the trace addition device 40 is supplied is disposed in the connecting portion 13.
[0014]
The powder body storage unit 11 is provided with a hopper 20 that stocks flour at the top, and a plurality of stirring blades 21 are installed below the hopper 20 to stir the flour and prevent the occurrence of bridges. A stirring shaft 22 is disposed, and a screw conveyor 23 for supplying flour to the transfer bagging unit 12 is provided further below the stirring shaft 22. 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 portion 14.
[0015]
On the other hand, a screw feeder 30 is provided in the transfer bagging unit 12 provided below the granular material storage unit 11 and connected by the connecting unit 13, and the flour is filled into the filling port 31 by the rotation of the screw feeder 30. A predetermined amount (for example, 25 kg) of flour is filled in the packaging bag 33 which is transferred toward the container and pushed out from the filling port 31 and placed on the weighing device 32.
[0016]
The screw feeder 30 is rotated at a high speed for a large amount of filling the packaging bag 33 with a large amount of flour in a short time, and at a low speed for a small amount of filling while controlling the filling amount of the flour. After filling most of the flour filled in the packaging bag 33 with a large amount, the weighing device 32 weighs the weight of the flour filled with the small amount of flour and fills the shortage with a small amount of 25 kg of flour in about 10 seconds. Is accurately measured and filled into the packaging bag 33.
[0017]
The screw feeder 30 is rotationally driven via a conducting means 35 by a variable speed motor 34 provided inside the leg portion 14 and capable of controlling the rotational speed, and the rotational speed is detected by a detecting means 36 so that the screw feeder 30 is predetermined. It is automatically controlled to rotate at a rotation speed of.
[0018]
  The trace addition device 40 for supplying the additive to the fixed-quantity bagging device 10 as a whole is a pressure vessel, and an airtight hopper 42 is provided at the upper end portion, and a plurality of stirring blades 43 are attached to the lower portion thereof. The additive storage part 41 in which the stirring shaft 44 is disposed, an additive transfer part 45 having a screw feeder 46, and a dispersion chamber 48 downstream thereof are provided below the additive storage part 41. .
  In addition, the trace addition device 40 measures the total weight,AdditiveIt is placed on a weighing device 70 for finding out the amount added.
[0019]
The additive such as nutrient powder transferred by the screw feeder 46 fills the space between the terminal end of the screw feeder 46 and the dispersion blade 47, and further from the gap of the dispersion blade 47 by the additive transferred by the screw feeder 46. Extruded, dispersed and delivered to the dispersion chamber 48.
[0020]
Here, as shown in FIG. 3, the dispersion blade 47 is a disc in which gaps are formed radially. Therefore, the additive filled in the space between the terminal end of the screw feeder 46 and the dispersion blade 47 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. By preventing the pulsating supply of the feeder, the additive can be stably pushed out in a fixed amount and delivered to the dispersion chamber 48.
[0021]
The additive delivered to the dispersion chamber 48 is dispersed in the air stream by the compressed air stream flowing from the top to the bottom as shown by the arrows in FIG. 2 and passes through the supply pipe 51 together with this air stream. Then, it is added to the flour in the connecting portion 13 from the additive supply port 53 provided in the connecting portion 13 of the fixed-quantity bagging apparatus 10.
[0022]
Compressed air from the compressor 55 is supplied to the dispersion chamber 48 and the hermetic hopper 42 by the supply pipe 52 and the supply pipe 54 branched from the supply pipe 50. The supply pipe 51 is a pipe that sends a mixed air 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 drawing 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 52 a and 54 a provided in the air supply pipe 52 and the air supply pipe 54. Here, the internal pressures of the airtight hopper 42 and the dispersion chamber 48 are preferably the same or slightly higher in the airtight hopper 42 in order to prevent the backflow of the additive.
[0023]
The screw feeder 46 is rotated at the same timing as the screw feeder 30 of the fixed-quantity bagging apparatus 10 by the conduction means 57 connected to the transmission means 56 fixed to the rotation shaft of a drive motor (not shown). An amount of additive proportional to the supply amount is added from the additive supply port 53 to the flour of the connecting portion 13. In addition, the stirring shaft 44 to which the stirring blades 43 are attached is similarly rotated by the conduction means 58 connected to the transmission means 56 to prevent the formation of the additive bridge in the hermetic hopper 42.
[0024]
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 uniformly mixed. Since the packaging bag 33 is filled from the filling port 31 of the transfer bagging portion 12, wheat flour in which the additive is uniformly mixed in all the portions of the packaging bag 33 can be obtained.
[0025]
The trace addition device 40 is entirely mounted on a weighing device 70. Every time at least one flour is filled in one packaging bag 33, the total weight of the trace addition device 40 containing the additive is measured, and the flour is added. The weight of the additive added 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 flour, the amount of additive added to the flour in the packaging bag is measured, and at least one of display and recording is performed.
In addition, increase / decrease in the quantity supplied of an attachment is performed by increasing / decreasing the rotation speed of the screw feeder 46 of the trace amount addition apparatus 40. FIG.
[0026]
As shown in FIG. 4, an air supply pipe 52 is connected to the upper part of the dispersion chamber 48 of the trace addition device 40, and a supply pipe 51 is connected to the lower part of the dispersion chamber 48. Further, as shown in FIG. 1, the air supply pipe 54 is connected to the top of the airtight hopper 42.
[0027]
In the minute amount adding device 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, the supply pipe 52 and the supply pipe 54, and the electric cable for connecting the drive motor to the power source are connected to the outside of the trace addition device 40.
For these pipes, flexible pressure-resistant hoses with relatively high elastic repulsion, such as netted vinyl tubes, are used. On the other hand, vinyl cabtyre cables are used for electrical cables. , Both of which are flexible but have a relatively high elastic repulsion.
[0028]
In the trace addition device 40 using the present invention, these pipes, electrical cables, and the like are in contact with each other by vibration or the like so as not to contact each other on the side of the trace addition device 40 from the partition joint 68 described later. Or the radius of curvature does not change.
[0029]
That is, as shown in FIG. 4, the supply pipe 52 is connected to the upper part of the dispersion chamber 48 using an elbow, and the supply pipe 51 is connected to the lower part of the dispersion chamber 48 so as to hang naturally without contacting each other. Is done. The air supply pipe 54 is also connected to the top of the airtight hopper 42 so as to hang naturally without contacting other piping by using an elbow in the same manner as the air supply pipe 52.
In this case, without using an elbow, the connection may be made so that they are naturally suspended by the curvature of the air supply pipe 52, the air supply pipe 54, etc. themselves.
[0030]
The supply pipe 51, the supply pipe 52 and the supply pipe 54 are fixed by a fixing means 60 below the dispersion chamber 48. The fixing means 60 bends the pipe (and the electric cable or the like) in a sufficiently large and smooth circular arc so as to be in a horizontal (or substantially horizontal) state, and fixes (holds) the pipe at the horizontal portion.
The fixing means 60 includes a slide block 61, a screw 62 screwed into the slide block 61, and a support block 63 that supports the screw 62, and the slide block 61 is rotated by rotating a knob 64 fixed to the screw 62. It is fixed to a moving means 65 that can move in the vertical (vertical) direction.
[0031]
The moving means 65 for moving the fixing means 60 in the vertical direction is fixed to a gantry 66 on which a weighing device 70 for measuring the total weight including the stored additive is placed. The fixing plate 67 is fixed. Further, the extension portions that have passed through the fixing means 60 of the supply pipe 51, the supply pipe 52, and the supply pipe 54 are attached to the mounting plate 67 by a partition joint 68 (the partition joint of the supply pipe 52 is omitted in FIG. 4). As shown in FIG. 1, the supply pipe 51 is connected to the additive supply port 53, and the air supply pipe 52 and the air supply pipe 54 are connected to the compressor 55 via the air supply pipe 50.
[0032]
The fixing of the flexible body connected to the outside such as the supply pipe 51, the supply pipe 52 and the supply pipe 54, and the electric cable, etc., is basically performed as follows. Is called.
First, remove all the pipes and electrical cables connected to the external device etc. from the trace addition device 40 and place only the trace addition device 40 on the weighing device 70, measure the weight at this time, For example, this weight is reset to zero, and this zero is set as a reference weight.
[0033]
Next, an attachment adjustment process is performed. That is, one pipe or electric cable is connected to the micro-adding device 40, bent from the suspended 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 60 is moved in the vertical direction, and the weight displayed on the weighing device 70 is adjusted and fixed at a position where the weight becomes the reference weight. Or it adjusts and fixes to the position used as the predetermined range set according to the reference | standard weight.
When the adjustment and position fixing of the flexible body such as the first pipe is completed, the same operation is performed on the next pipe and the like, and then the same adjustment and position fixing are sequentially performed one by one. The flexible body is connected to the trace addition device 40.
[0034]
In the micro-addition apparatus 40 using a screw feeder, the supply amount of the granular material can be controlled by the capacity, and therefore the supply amount of the granular material can be controlled extremely accurately.
However, when a pipe or an electric cable is fixed to a device to be measured such as the trace addition device 40, an elastic repulsion force or weight due to the bending of the pipe or the electric cable, a force applied to the pipe or the like from the outside, and a curvature caused thereby. (Hereinafter, these are collectively referred to as disturbances) affect the measurement result of the weighing device 70, and accurate weight measurement cannot be performed.
In particular, in the micro-addition device 40 as shown in the illustrated example, the total weight is over a dozen kg when the additive is filled, and the additive amount is usually about 10 g per bag. Even a slight measurement error due to disturbance causes a large decrease in accuracy, and the amount of powder supplied is accurate. It is difficult to grasp properly.
[0035]
On the other hand, in the present invention, when the flexible body connected to the outside such as piping is connected to the trace addition device 40 or the like, the position of the fixing means 60 is moved in the vertical direction by the mounting adjustment step. By making the measurement value of the weighing device 70 coincide with 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 is measured by the weighing device 70. The impact on the total weight measurement of the device can be minimized.
Therefore, as shown in the illustrated example, the total of the additive and the own weight is 20 kg or more, and even when supplying 20 g or less, for example, 5 g of granular material as an additive to one bag, it is accurate. The total weight measurement of the micro-measurement device 40, that is, the addition weight of the additive can be measured.
[0036]
The pipe and the electric cable are fixed to the bulkhead joint 68 fixed to the frame 66 (mounting plate 67) on which the weighing means 70 is placed outside the fixing means 60 (with respect to the micro measurement device 40). Therefore, the force (external force) caused by the pipes or the like on the outer side does not affect the inner side of the fixing unit 60, and therefore does not affect the measurement result by the weighing unit 70.
However, if the fixing means 60 can fix the pipes and the like sufficiently and there is no external force due to the outer pipes or the like, or if there is very little external force, the partition joint 68 or the like is not provided outside the fixing means 60. Also good.
That is, in the present invention, even if a pipe or the like outside the fixing means 60 is moved, the external force does not affect the pipe or the like inside the fixing means 60, and therefore the measurement result by the weighing means 70 is affected. There is no problem (or the influence is extremely small).
[0037]
There is no particular limitation on the connection order of the piping and the electric cable, but preferably, after connecting the piping and the electric cable having a relatively high elastic repulsion force, the piping and the electric cable having a small elastic repulsion force are connected.
If the elastic repulsive force is small enough that the weight displayed on the weighing device 70 does not change even if the piping or electric cable moves up and down the fixing means, give sufficient slack. , It may be fixed at an arbitrary position.
[0038]
After connecting all the pipes and electrical cables as described above, the hermetic hopper 42 is filled with additives such as nutrient powder, and the total weight of the micro-addition device 40 is measured by the weighing device 70. By reducing the total weight, the amount of additive supplied can be measured.
[0039]
In the above example, the fixing means 60 for piping and electric cables and the moving means 65 for adjusting the position of the weighing apparatus 70 are placed on a platform 66 on which the weighing apparatus 70 is placed, that is, the weighing apparatus 70 is subjected to a heavy load. However, the present invention is not limited to this, and is not limited to this. The rigid body that is on the weighing device 70, a member that is fixed to the rigid body portion, and the weighing device 70 are mounted on the weighing device 70. The fixed member 60 and moving means 65 for the pipe and electric cable, and further, the fixing part for the pipe and electric cable, and the like may be disposed on the member and the like.
Even in this configuration, an accurate weight measurement can be performed as long as the external force due to the piping or the electric cable does not affect the inside of the fixing means 60 and does not give a heavy load to the measurement by the weighing means 70. it can.
[0040]
An example is shown in FIG.
In the example shown in FIG. 6, the mounting plate 72 is fixed to the airtight hopper 42 of the trace addition device 40 placed on the weighing device 70, and two moving means 65 are fixed to the mounting plate 72, The supply pipe 52 and the supply pipe 54 are fixed in a (substantially) horizontal state by the fixing means 60 fixed to the moving means 65.
The air supply pipe 52 and the air supply pipe 54 are fixed to a rigid body portion that is outside the fixing means 60 and does not give 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.
[0041]
In the example shown in FIG. 6, the method of attaching the air supply pipe 54 may be performed in the same manner as in the above-described example.
On the other hand, the air supply pipe 52 is attached by attaching the air supply pipe 52 to a predetermined position of the dispersion chamber 48, then bending the air supply pipe 52 with sufficient curvature from the vertical direction to the horizontal direction, and fixing means at the horizontal position. At 60, the supply pipe 52 is fixed. Thereafter, in the same manner, the fixing means 60 is moved up and down by the moving means 65 to adjust the position, and the weight displayed on the weighing device 70 is fixed to a position where the weight becomes the reference weight (predetermined range).
[0042]
In this aspect, there is a possibility that the measurement value is disturbed during the adjustment by the moving means 65 in the attachment adjustment process. However, after the adjustment is completed, the disturbance to the weighing device 70 due to each pipe or the like is eliminated as in the above example. Alternatively, the disturbance can be minimized. Further, by fixing with a bulkhead joint or the like outside the fixing means 60, the external force does not affect the inside of the fixing means 60, and therefore does not affect the measurement by the weighing device 70. Weight measurement is possible.
[0043]
FIG. 7 shows another embodiment of the present invention.
In the embodiment shown in FIG. 7, a mounting plate 80 is fixed to the outer wall surface of the airtight hopper 42 in a state of hanging from here, and fixing means 60 and moving means 65 for piping and electric cables are fixed to the mounting plate 80. ing. Therefore, the mounting plate 80 and the fixing means 60 are placed on the weighing device 70. In this embodiment, a substantially L-shaped fixing plate 82 is fixed to the gantry 66, and a pipe or the like is fixed to the fixing plate 82 using a partition wall joint 68 outside the fixing means 60. In this embodiment, connection and adjustment of piping and the like may be performed according to the embodiment shown in FIG.
Also in this aspect, there is a possibility that the measurement value is disturbed during the adjustment by the moving means 65 in the attachment adjustment process. However, after the adjustment is completed, an accurate weight measurement can be performed as in the previous example. .
[0044]
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 from here, and a vertical plate 84a fixed vertically to the fixing plate 84 is provided. The pipe is fixed using a bulkhead joint 68. Further, the mounting plate 86 is fixed to the gantry 66, and the moving means 65 for holding the fixing means 88 is attached to the mounting plate 86.
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 a partition joint 68. Then, the vertical plate, that is, the partition wall joint 68 itself is moved by the moving means 65 to perform adjustment in the attachment adjustment process. Also in this aspect, connection and adjustment of piping and the like may be performed according to the aspect shown in FIG.
[0045]
According to this aspect, although a part of the piping or the like is fixed to a portion that affects the weighing means 70, as described above, the measurement value of the weighing means 70 is not disturbed during adjustment by the moving means 65. Further, since the piping or the like is fixed to the fixing means 88 using the partition wall joint 68, the external force does not affect the weight measurement by the weighing device 70.
[0046]
In the example shown in FIGS. 6 to 8, the mounting plate 72 and the like are fixed to the airtight hopper 42, and the fixing means 60, the moving means 65, the partition wall joint 68 (fixing part such as a pipe) and the like are fixed thereto. However, the present invention is not limited to this, and various configurations can be used.
For example, the moving means 65 may be fixed directly to the airtight hopper 42, or the moving means 65 may be fixed to a rigid part such as a frame attached to the airtight hopper 42.
[0047]
【Example】
FIG. 9, FIG. 11 and FIG. 12 show data when the granular material is actually sent out by the granular material supply device (trace addition device).
[0048]
As shown in FIG. 10, the data in FIG. 9 is obtained by sending the additive sent from the same microadder 75 as the microadder 40 shown in FIG. It is the graph which measured and plotted the delivery amount for every time with the weighing apparatus 78 which mounted the storage container 77. FIG.
In this example, the target value is 10.5 g, and the additive is delivered in 10 seconds. As is apparent from the graph of FIG. 7, the amount of additive delivered from the micro-adder 75 is 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 10.5 g.
[0049]
The graphs of FIGS. 11 and 12 show the measurement results obtained by the weighing device that measures the weight of the minute addition device 75 when the same minute addition device 75 is placed on the weighing device and the same granular material is delivered. 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 in which the present invention is not adopted. .
[0050]
  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 10.5 g is 10.35 g, the standard deviation is 1.43 g, and the average value is relatively Although it is transmitted with high accuracy, the standard deviation is the actual transmission described above.QuantityIt has reached 5 times the standard deviation calculated. This increase in standard deviation clearly indicates that the weighing device display contains a large error.
  On the other hand, according to the present invention, as shown in FIG. 11, the average value of the delivery amount is 10.50 g, achieving the target, and the standard deviation is 0.89 g. Compared with the experimental example of FIG. Further, as is apparent from the graph of FIG. 11, the delivery amount is far from the average value only in the first few times, and the present invention is adopted if this is excluded as a transient phenomenon at the start of operation. Obviously, the standard deviation in this case is even smaller.
[0051]
【The invention's effect】
Since the present invention is configured 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 force, the disturbance due to these is a weighing device. For example, when measuring the total weight of a trace addition device that supplies a trace amount of additive to a quantitative bagging device that quantitatively packs flour, etc. Thus, it is possible to properly grasp the supply amount of the additive.
[Brief description of the drawings]
FIG. 1 shows a conceptual diagram of an example of a fixed-quantity bagging apparatus using the present invention.
FIG. 2 is a detailed view showing a tip portion of the trace addition device.
FIG. 3 is a view taken along the line AA in FIG. 2 showing an example of the shape of the dispersion blade.
4 is a view taken along the line B-B in FIG. 1 showing a fixing device for a flexible body.
5 is a cross-sectional view taken along the line CC of FIG. 4 showing details of the flexible body fixing device.
FIG. 6 is a view showing another example of a flexible body fixing device according to the present invention.
FIG. 7 is a view showing another example of the flexible body fixing device according to the present invention.
FIG. 8 is a diagram showing another example of a flexible body fixing device according to the present invention.
FIG. 9 is a graph showing the amount of additive delivered from the micro-adder.
10 is a conceptual diagram showing a configuration of an experimental apparatus 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]
  10 Fixed-quantity bagging equipment
  11 Powder storage part
  12 Transfer bagging part
  13 Connecting part
  14 legs
  20 Hopper
  21 Stirring blade
  22 Stirring shaft
  23 Screw conveyor
  24,26 Conducting means
  25 Drive motor
  30 Screw feeder
  31 Filling port
  32 Weighing device
  33 Packaging bags
  34 Variable speed motor
  35 Conducting means
  36 Detection means
  40 Trace addition equipment
  41 Additive reservoir
  42 Airtight hopper
  43 Stirring blade
  44 Stirring shaft
  45 Additive transfer section
  46 Screw feeder
  47 Dispersion blade
  48 Dispersion chamber
  50 Air supply pipe
  51 Supply pipe
  52,54 Air supply pipe
  53 Additive supply port
  54 Air supply pipe
  55 Compressor
  56 Transmission means
  57, 58 Conducting means
  60 Fixing means
  61 slide block
  62 screw
  63 Support block
  64 knobs
  65 Moving means
  66 frame
  67, 72, 80, 86 Mounting plate
  68 Bulkhead joint
  70 Weighing device
  75 Trace addition device
  76 Piping
  77 Storage container
  78 Weighing device
  82,84 fixed plate

Claims (5)

A measuring device connected to the outside by a flexible body and a weighing device for measuring the weight of the contents stored in the measuring device, and measuring the total weight of the measuring device in which the contents are stored In a weighing device in which the change in the measured total weight is the change in the weight of the contents,
Removing all of the flexible body from the device to be measured, measuring the weight of only the device to be measured by the weighing device, and obtaining a reference weight of the weighing device from the measurement result;
It is possible to connect the flexible body to the device to be measured and adjust the fixed position of the flexible body to a position where a measurement value by the weighing device is within a predetermined range set according to the reference weight. They performed one by one Shiwakarada, connecting all of the flexure to the device under test, possess a mounting adjustment step of the flexible member,
The weighing apparatus is characterized in that the fixing position of the flexible body in the attachment adjusting step is adjusted by using a fixing means for holding the flexible body in a substantially horizontal state and moving the fixing means in the vertical direction. Calibration method. A powder supply means having a transfer means for transferring powder particles by a screw feeder, and a transport means for pneumatically transporting the powder particles conveyed by the transfer means, and connected to the outside by a flexible body; Weighing means for measuring the weight of the granule supply means and the flexible body connected to the powder supply means are fixed in a substantially horizontal state, and the position of the flexible body in the substantially horizontal state is adjustable in the vertical direction. Fixing means,
By adjusting the position of the fixing means in the vertical direction, the influence of the flexible body on the weighing means is reduced. Powder according the granular material supply means, the additive that is added to particulate material to be bagged in powder or granular material filling and packaging apparatus, to claim 2 and supplies the powder or granular material filling and packaging apparatus Granule supply device. The powder and granule supply means has a total weight of more than 20 kg due to its own weight and the granular material, and the granular material is 20 g or less per one bag packed by the granular material filling and packaging apparatus. The granular material supply apparatus according to claim 3 , wherein the powder is supplied as an additive. The granular material supply apparatus according to any one of claims 2 to 4 , wherein the fixing means curves and holds the flexible body extending in a vertical direction in a substantially horizontal state.

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