JPH04118528A - Device and method for combined weighing - Google Patents

Abstract

PURPOSE:To perform accurate and efficient combined weighing with small sized device by designating the number of combined hoppers at computing combined weighing, controlling to adjust combination averagedly and dispresedly, and leveling flow at supplying to the hoppers. CONSTITUTION:When goods are charged from a pool hopper 3 to a weighing hopper 9 and hopper 3 is emptied, a supply feeder 6 is operated to supply a nearly prescribed quantity, and the goods are charged to a weighing hopper 4' not yet supplied and weighed. The value which the weighing value of a hopper 4 at last time is subtracted from the above-stated value, is the weight of the hopper 4' and this value is memorized in a computer. Nextly, the goods after weighing at the hoppers 4,4' are supplied to memory hoppers 5,5', against emptied hoppers 4,4' similar operation to the last time is performed, the weighed goods are filled in the hoppers 4,4' and 5,5' and respectively memorized to the computer, and further and hopper 3 is also supplied with goods of prescribed weight. Hereby, a combined weighing device of accuracy, efficiency, and small size light weight is obtained.

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to the supply of products to a weighing device of a weighing device using a combination calculation method used when food and other products are packaged and provided to consumers. The present invention relates to a device and method for the combination weighing.

(Summary of the gist) The invention of this application is applicable to the food industry and many other fields, especially for the purpose of protecting snack foods and other products produced in large quantities in confectionery manufacturing factories, etc., and also for the purpose of taking into account the sanitary aspects of handling. After that, a predetermined amount is measured based on weight or selling price, and the product is packaged and sold using a packaging machine, which requires high accuracy and performance.

This weighing number = From the previous method of weighing the set weight of one bag at once using a scale, the product is divided into multiple appropriate amounts, each weighed, and the weighing value is randomly calculated using a calculator. Weighing devices based on a combination weighing system have come into widespread use, in which a combination of weight values is calculated that matches or is as close as possible to the set target weight value ζ, and the combination is then sent to the packaging machine. .

Ta.

It is obvious that this combination type weighing device is faster and more accurate than traditional weighing devices (i.e., it has a faster weighing speed and higher accuracy, but it requires a greater number of combinations than the target weight values to be combined to obtain the set weight value. Although there is a limit to this, there is a tendency to increase it because the results are better, and this leads to an increase in the size and weight of the device, and the method of feeding the product to be weighed to the weighing device and its It became necessary to reconsider the installation method, etc., and it became necessary to reconsider it.

(Prior art) Products that have been combined and weighed to a set target weight value using this combination weighing device are then sent to a coloring machine and packaged, but a weighing device is separately installed in the packaging machine to weigh and transport the products. A method of feeding using a machine, or a method of placing a ζ2 weighing device on the upper part of the packaging machine, dropping the products that have been combined and weighed to a set target weight downward, collecting them in a collection hopper, feeding the packaging machine≦2, and packaging. However, recently the latter method has become mainstream and most of the work is done using this method.

However, depending on the model, this weighing device is commonly used and weighs anywhere from 500 to 1,000 papers, and is also quite large. It is installed on a pedestal in a space that supports the weight of the weighing device as well as the weight of the workers who maintain and repair the weighing device, and that does not interfere with the work. It is supported by pillars installed on all sides at positions that do not interfere with maintenance work.Weighing equipment inherently dislikes vibration, and levelness of installation is also important, and it is difficult to install multiple packaging machines side by side. In such cases, consideration has been taken to share the pillars between the packaging machines and the next packaging machine to support the weight, but pillars are usually installed on all four sides of each packaging machine, which can be an obstacle to work. .

(Problems with the prior art) This method of installing the weighing device on top of the packaging machine requires less installation space and does not require a conveying machine compared to the method of installing the weighing device separately and supplying the product using a packaging machine (= weighing device). However, as mentioned above, it requires a stand made integrally with the stage for normal maintenance that supports the weighing device, and a pillar to support it, and the packaging machine also has to accommodate this external dimension. However, the position of the pillars was determined in such a way as to ensure sufficient space for operation and maintenance, but it was unavoidable that they would become a hindrance to traffic, transportation of packaging materials, etc.

In addition, when a weighing device picks up vibrations, the measurement accuracy decreases, and even when workers pass nearby for maintenance etc., it may be affected by the vibrations.To prevent this, the components that make up the i2 stand are Although it is manufactured using a steel frame such as shaped steel, there are disadvantages such as the thickness of the members and the pillars that support it must have sufficient strength, and there are many problems in terms of weighing and packaging work, making it particularly common. The impact on vertical packaging machines, which are often used in

Studies have been continued to alleviate these problems, and improvements have been made to the packaging machine itself.The vibrations generated during packaging work have been reduced, and the packaging machine itself has been supported at the top by providing vertical strength. This allows the weighing device to be supported, and instead of using a conventional pedestal to support the weight of the weighing device, a stage used only for maintenance of the weighing device can be placed at a slight distance from the weighing device and passed near it. As a result, the components that make up the stage and the pillars that support it can be made smaller, and when multiple packaging machines are used side by side, the conventional packaging machines It was also possible to reduce the number of pillars that were straddled between each package, and improvements were made in that respect and the workability was also improved. However, with this installation method of packaging machine and weighing device integrated, the weighing device for two packaging machines New problems have arisen, such as the dimensions of the machine and the position of the center of gravity when it is installed in one piece.

For packaging with vertical pillow packaging machines, the single type, which has one bag-forming and packaging unit per packaging machine, and the twin type, which has two bag-forming and packaging units per packaging machine, are used, and a combination weighing device is also used. Packaging machines that correspond to each of these have been put into practical use. Normally, the bag making and packaging section side is the front, and although there are some exceptions, the rear is usually loaded with ζ2 curly packaging film, and is used to feed the film, step rollers, etc. The film is transferred from the rear to the former from the upper part to the front former, part of the cylinder &: After making bags, the products weighed to the specified target weight are collected in this bag if the weighing device is added as described above. Since the system is such that products are loaded and packaged through a hopper, weighing products must be fed to the front of the packaging machine.

On the other hand, although there are some exceptions, weighing devices usually have a dispersion table in the center of the top, and multiple sets of two or more hoppers are placed around the circumference of the table, and after measuring the weight with a weighing sensor, the calculator The combination that is closest to the set weight value is calculated and the products in that combination are discharged downward from the hopper that is the target of that combination, collected in a collection hopper, and fed to the packaging machine. For the single type, care has been taken to ensure that there is no difference in the distance from each hopper to the collection hopper, and for the twin type, care has been taken to ensure that there is no difference in the sliding distance inside the collection hopper, or if there is a difference, it is minimized. Therefore, both single and twin types are installed symmetrically to the left and right when viewed from the front, and when viewed from the side, the center of the weighing device and the center of the former and cylinder of the packaging machine should be aligned. Yes, this was not a big problem when the weighing device was installed on a stand, but when the packaging machine and weighing device were integrated, the center of gravity of the weighing device was almost the same. Front side (=This will cause an unstable element, and in order to improve the efficiency of weighing and packaging, it is required to increase the degree of packaging, and more accurate weighing accuracy is required, so in response to this, the measured values to be combined are Increasing the number of weighing devices increases the size and weight of the weighing device, which is a significant advantage, but when installing an integrated weighing and packaging machine, it is also important to note that the width is sometimes wider than the packaging machine when viewed from the front. However, there were problems such as a large overhang and lack of stability.

There was a problem.

(Object of the Invention) The object of the present invention is that when weighing and packaging a product, the packaging machine uses the weight or selling price of the product as a reference, and mounts the packaging film at a predetermined position, which is determined by the bag width according to C2, and carries out the packaging. Be versatile to the extent that what you do is temporary,
In addition, the operation control panel, etc. are installed in easy-to-handle locations, and the width of the machine is 1 set of former cylinders.
A single type that packs in bags, or a twin type that installs two sets and packs in two bags.Although it requires a little more margin, consideration is given to miniaturization.

On the other hand, on the weighing device side, either a weighing device with a capacity corresponding to the packaging machine that weighs and supplies the product is loaded and installed on a prepared pedestal, or as mentioned above, it is placed on the top of the packaging machine instead of on the pedestal.
The two supports are installed either by supporting the weighing device or by dropping the weighed product into the packaging machine and feeding it. If you increase the number of weights, the weight will increase accordingly, but even if you increase the number of weight values to be combined, it will not become bulky, it will be small, the measurement accuracy will not decrease, the efficiency will not decrease, and it will be lightweight and have high stability when installed. The purpose of this invention is to provide a device and method for this purpose.

(Means and actions for solving the problem) In accordance with the above-mentioned object, the structure of the invention of this application, which is summarized in the above-mentioned claims, is to review the principle and structure of the combination weighing device in order to solve the above-mentioned problem, and to develop a packaging machine. Packaging bag size C2, which is determined based on the weight of the product to be packaged and the selling price and is frequently packaged, allows packaging film to be made and packaged with a width within a certain range It is designed to be able to handle changing the position of parts and equipment to the extent that To,
If it is a twin type, there is a temperature control device on both sides for starting and stopping the coloring machine, and for heat sealing the film.More recently, microcomputers are often used to control each part, and the display etc. are compact. Although they were assembled as a single unit, there is a tendency for them to be converted into huts.

As mentioned above, the measuring device installed on the top of the weighing device is used to make potato chips, which are a snack food that is often used in larger sizes to meet the demands of the times for improving accuracy and efficiency, and each bag weighs about 100 grams and is relatively large in size. The capacity of a hopper for combined weighing is usually about 2 liters, sometimes about 3 liters, and there are some exceptional value large bags, but if it is about 100 grams, a hopper with m pieces is enough. Consideration has also been given to making it possible to measure the product, but this makes it difficult to miniaturize the entire product.Also, it is possible to use combination weighing, in which a product that has been weighed separately is combined and calculated using a calculator 42 such as a microcomputer to obtain a set target value. It does not fit the purpose of the method.

Therefore, the accuracy and efficiency of the weighing device must be adjusted according to the product to be weighed without compromising the accuracy and efficiency of the weighing device. The planar dimensions of various hoppers, feeders, etc. that make up the weighing device for weighing products similar to those of , remove the excess dimensions, add a hopper for memory, increase the number of weighing values to be combined, and perform combination calculations (2) Calculate the weight of the products to be combined that are supplied to the weighing hopper. As a method of controlling the weight by referring to the result of the combination calculation, rather than adjusting it by the feeding time of the feeder, feed, weigh, and calculate the combination so that it does not become too much or too little. By specifying the number of products and adjusting and controlling the combination in an average (=distributed) manner, and by downsizing the weighing device, the flow is leveled in the process when the distributed feeder is used to supply products for weighing. In order to prevent the equalization of transfer from being inhibited, we reviewed the arrangement and adopted a method that would make it as long as the conventional C2, and by combining this with the above-mentioned weight-based feeding system, we created a compact, precise, and highly efficient system. It takes technical measures for good combination weighing.

This is what I learned.

(Embodiments) Next, embodiments of the invention of this application will be described below with reference to the drawings.

FIG. 1 is an explanatory perspective view showing a weighing unit 1 for preparing a plurality of weight values to be combined in a combination weighing device configured according to the present invention, and FIG. A pool hopper 3, a weighing hopper 4, 4 of a plurality of weighing units 1 arranged circumferentially around a center 2
This is a schematic cross-sectional view of the relative positions of the memory hopper 5, the memory hopper 5, and the distribution feeder 6.6 for transferring the products supplied to the distribution table 2 to the pool hopper 3.

When weighing, the product is supplied by a not-shown supply device to approximately the center of the dispersion table 2 provided in the center, with consideration given to the device so that the weight value or level etc. will not fluctuate as much as possible. This distributed table 2
has a low conical shape or a shape close to this, and the slope of the slope from the horizontal plane is usually less than the angle of repose of the product. If necessary, vibration is applied by a vibrating device shown in the diagram, which causes the product to slide down and touch its outer periphery. A distributed supply feeder 6C provided at

As mentioned earlier, the pool hopper 5 is arranged on the circumference around the distribution table 2, and if it is empty, the pool hopper 5 is placed around the distribution table 2.
The distributed feeder 6, which is provided in correspondence with the products being supplied above, is vibrated by a vibrating device ζ2 (not shown) to the pool hopper 6 equipped with the pool hopper weighing sensor 7.7. Calibrate the weight and feed as described above.

The products supplied to the pool hopper 3 are placed in the lower part of the pool hopper 3 in the center vertical direction (abbreviated as the Nigur hopper 3, although it may be limited to the same volume, a weighing hopper with two sardines integrated in parallel is connected to the weighing sensor 8). 8, and if both weighing hoppers 4 and 4' are empty, open the pool hopper discharge plate 9, for example 9, and throw the product into the weighing hopper 4. When the temperature has subsided, the weight is measured by the weight sensor 8 and stored in a calculator for combination calculation.

During these operations, the weighing hopper 9 from the pool hopper 3
- When the product is put in and the pool hopper 3 becomes empty≦2, immediately activate the feeder 6 to disperse the product, check it with the weighing sensor 7 as before, and supply approximately a predetermined amount.
When the product is finished, the product is put into the weighing hopper 4' which has not been supplied yet and weighed.This weight value is the total weight of the weighing hopper l as well as the weighing hopper 4, so the previous weighing is calculated from that weight value. The weight of the weighing hopper 4' is subtracted from the weight of the weighing hopper 4', and this value is stored in the calculator.

The products supplied and weighed in the weighing hopper 4.4' in this way are then weighed in the corresponding weighing hopper 4.4' if both or one of the lower memory hoppers 5.5' are empty. 10. 10 on the center side of the weighing device 10' is opened by a drive device (not shown), and the product is fed into the correspondingly provided memory hopper 5.5' and emptied. Either of the weighing hoppers 4 or 4', which has become
．． Both of the 4 products are filled with the products whose weight values are measured by the weighing sensor 8 and stored in the respective calculators.C Nippur hoppers 3 & 2 are also supplied with products of a predetermined weight, and the preparation for combination by the calculator of the weighing unit 1 is completed. As shown in Fig. 2, in this embodiment, 10 weighing units 1 shown in Fig. 5 are prepared, and each unit performs the same operation as described above. Then, one weight value to be combined is selected from each weighing unit 1 to obtain a combination that will result in a set target weight value, and each unit to be combined 1 which has received a packaging signal from the packaging machine and which has become a target for combination. Weighing hopper 4.47 Memo I
Open each discharge plate of the hopper targeted for the combination of J Hoch-5 and 5' and lower the lower part C1 and set the assembly size lever 11.
The same operation as above is repeated again to the empty hopper, and the products on the weighing machine are distributed according to the packaging speed of the packaging machine. The discharge plate is shown.

Pool hopper 3 to obtain the weight value for the combination
(2) Products are supplied according to the weight standard, but the purpose of this total 1 is not to keep the supply amount constant, but as mentioned above, it is to prevent the weight from being too much or too little, and the weight depends on the weighing situation. The aim is to control the distribution so that the distribution weight is around the 1 quantity value obtained by dividing the distribution, so the weighing unit 1 is 1 [22, The weighing accuracy and capacity can be determined appropriately depending on the required level, but if it is 10 units, a twin-type packaging machine (as shown in Figure 6) is sufficient.
If the 10 units shown in Figure 1 are adapted to the collection hopper shown in Figure 2 and 5 units correspond to 1 set of weighing and packaging, then 2 sets of 5 units x 2, that is, a twin-type packaging machine that weighs and packs 2 bags at a time. It can correspond to

Ru.

Obtaining a target set value using a weighing device using a combination weighing method.The number of weight values to be combined was mainly within 4WA with the 14 scale twin type that was commonly used in the past, but with the adoption of a memory hopper, etc., the number has increased. However, it is still one set of measuring packaging (= rarely more than 6 pieces, 4~
The method of the present invention, when used in a twin-type weighing unit, can obtain weight values for combinations that can be performed independently or in combination of four units, so the combination of The total number is 2'-1=1
5, and when the 5 units shown in this example (1) are installed, 155 = 759.375, compared to the conventional 14 scale without memory hopper, 214 - 1 = 1 to 683, or 2 - 1 = 65.535. When you consider that they were measuring and packaging the products, you can see that the number of orders of magnitude is ζ2.

When there are so many weight values to be combined, it takes time to calculate the set weights and combinations, and it is actually difficult to send them to the packaging machine once per second. ' = 5α625 or so, but in reality either hopper 4.4' or 5.5' is used and it takes time to wait for the product to be replenished from above, so replenishment of product ≦ 5 is empty even if there are two! If it is empty, it is necessary to go through the process of first replenishing from 4 to 5, then replenishing to 4 and weighing it, and the situation is different from replenishing to a separate hopper, even in simulation analysis. Conceivable.

In addition, if the weighing unit in this embodiment is 10 units, and two sets of weighing and packaging are performed, each set is 5 units, so the maximum supply capacity for weighing products is a hopper for 5 pieces, so this point should be noted. (1) The ability of the combination calculation requires a speed capable of replenishing the hoppers 4.4' and 5.5'l of the two products having the weight values to be combined.

(2) If the speed at which the product falls to the bottom is Q times per minute, the maximum capacity of the weighing hopper must be 4.Q times per minute. Generally speaking, it is considered to be about Q~2·Q times/min.

(3) - In a portable combination weighing device, even if it has 14 heads and is compatible with twin type weighing devices, a combination target weight value of 4 to 6111 il is taken out every time.In this case, the taken out product (
= You only need to supply as much as you can, so the number of weighing hoppers is 4 to 6.
Even just the WA portion is a good thing.

(4) When connected in this way, the number of weighing hoppers in a weighing device using a transportable combination weighing method can be as small as possible depending on the conditions, and the number of weighing hoppers in a multi-stage combination weighing device can be reduced depending on the conditions. It is possible to reduce performance without degrading performance.

As a result, the combination weighing device of the present invention determines the number of weight values to be combined to form a combination to obtain a set weight value, and supplies the determined weight values to the weighing hoppers 4 and 4' (= from the distributed supply feeder 6 to the pool hopper 3 (= product Divide the target weight by the number of hoppers in use to determine the standard amount, and adjust the weight so that the distribution weight is around that weight value. The sample is sequentially supplied to one of the weighing hoppers 4 and 4'.

In the combination calculation C2, priority is given to (1) combination calculation for extracting one combination weight value from each weighing unit 1;

(2) Even in the case of (1) above, priority is given to the weighing hopper 4.4', and the pool hopper 5.5' is fired when it is not available, but for hygroscopic products, it may be given priority at an appropriate timing. .

(3) For the weight of products supplied to the pool hopper 3, we constantly check the combination status of the combination calculations in progress and refer to the determined weight value, but when weighing, priority is given to distributed weight over accuracy. Adjustment of weight is always made within the range that allows for smooth combination calculations, as determined from the combination results.

(4) Each weighing unit 1, to 111i! If you take out the combination target weight, there are 3 pieces left, and from these 3 pieces, calculate and select the next combination to take out, and add the remaining 2IIm and the combination target weight value 1 that was compensated in between to make 3fm, and then By selecting the combination targets and performing the combinations in advance instead of each time, the combination calculation takes more time than the conventional method, and the efficiency of combination measurement is improved.

(5) If the set target value cannot be obtained with the determined number of combinations of hoppers and there are more or fewer combinations than that, the one with the smaller number is given priority.

Although high-accuracy, high-efficiency combination weighing including the above is performed, the conditions for weighing and packaging of snack foods such as potato chips are not good, but this method is still better than conventional combination weighing devices. If it is possible to downsize the distribution table 2 and distribution feeder 6.
There are also problems in reducing the size of products at the same ratio, which also relates to the physical properties of the product.

The number of units to be installed in the weighing unit 1 of the combination weighing device is determined by the product to be packaged and the required weighing accuracy, capacity, etc. Accordingly, the diameter is determined from the circumference length of each hopper, and then as described above. The diameter of the distribution table is determined according to the physical properties of the product (2).When the diameter of the distribution table is determined based on the diameter of the distribution table 2, conventionally a distribution feeder 6 is placed between this outer periphery and each hopper in the radial direction of the hopper≦2 to supply the distribution table 2. This distribution supply feeder 6 supplies the product to the pool hopper 3 that requires the product, but if the distribution table 2 cannot be made smaller due to the physical properties of the product, even if you try to downsize the entire product, the distribution supply feeder B I have no choice but to shorten the length of the .

If the length of this distributed supply feeder 6 is shortened, it will be difficult to level out the flow of the products and supply them stably during the transfer to feed the products on the distribution table 2 to the pool hopper 3, which will increase the transfer time. When adjusting the amount of product, the amount of product may be too large or too small, which is also a factor that hinders overall miniaturization.This is solved by the method of the present invention, which uses an extra C2 length. There is no problem, but the minimum length p necessary for leveling is required.

In order to solve this problem, the basic idea is shown in Fig. 4, and the actual arrangement is shown in Fig. 6. The pool hopper is installed adjacent to the outer circumference of the radius shown in Fig. 4. , the radius of the distribution table is n equal to Tr, the distribution feeder is conventionally provided in the direction of the radius R, and therefore its length is R-
A pool hopper of a predetermined size was installed with Br bi-tangential at r and R was the center, and this was connected in the direction of H connecting A to B (= attaching a distributed feeder).

Here, we will consider a method to maximize H.

H2= R2-4-r2-2 Rar*cosa(1)
Regarding the angle α, since α is an angle within 0 to 90°, H is maximum when COSα is the smallest (this means that H and r are orthogonal, so COSα is the smallest) (2) H2= for r r2-2 r"RC08ff + R2= (
r −Rcosy)2+R2(1-cos2a)H becomes the maximum when (r−Rmcosa)2 becomes the maximum (=; if it is far from Rmcosa, H becomes larger.

Since R2≧H2+r2 holds true.

From this f2, r2≦R2−R2 , ・, r≦(￥;”R2 (a) When r=b mouth 1, H becomes maximum and at this time cos
ts -H'=R2-r2H=RF (b) Or when r=0, H becomes maximum, and in this case, when comparing A and mouth, H is larger in the case of mouth.

That is, it can be seen that the smaller r is, the larger H becomes, but since r is determined by the physical properties of the product to be weighed and other factors, there are restrictions on this.

However, when R is determined and r is also determined, we will consider the following case as an example to maximize H. When R = 2r, maximizing H is the condition stated above. and R=zr
does not reach H maximum, but from the design point of view R=2r
There may be cases where this occurs.

When R = 2r, the maximum H is H2 = R2 - r2 = 4r2 - r2 = 3 r2 Therefore, H, = J7. This is the case where H and r are orthogonal, and it is approximately This means that the dimension ζ2 can be calculated to be 17 times larger.

Also, when H and r take 80° (=), the angle of ζ2 looking into side R becomes 180° - 80°, so the following equation holds true.

R2= r2-4- )F-2r@Hcos (1s
o°-80°) = r2-4- H'+ 2 r*HX
Since α1736R=2r, 4 r2= r2+ H2+ Q, 547 r@HH”
+ Q, 347 * r * H - 5r2 = 0 This gives = ÷ Q, 347 + , 711 TT ■)・r= 1
5672 r Like this (with a 0° angle change, the length of H is about 90 inches, which is about 15 times longer than the conventional method. This depends on R or r, and the length of H is about 90 inches. The installation position of the pool hopper 3 is determined by considering the product transfer area of the distributed feeder 6, the distance from the next distributed feeder 6, spill prevention, etc., as well as the bias cut of the tip of the distributed feeder 6 in the pool hopper 31i11. We also use methods to ensure a stable supply of products by determining the details through calculations and processing.

Furthermore, in addition to the above-mentioned method, the weighing unit can also be partitioned by providing six partition plates 12.12 in the embodiment, from the lower part of the weighing hopper 4.4' to the outer circumferential direction from the lower part≦2 center part, as shown in FIG. A cylindrical memory hopper unit 13 with a discharge plate (not shown) provided at the bottom of each chamber is held and attached to the central shaft 14. FIG. In the same way, each weighing unit (= from the distributed feeder 6.6 to the pool hopper 3)
．． 5, and then weighing hoppers 4.4 to 4',
After the products are sequentially supplied to the memory hopper unit 13, the products are sequentially supplied to the cylindrical memory hopper unit 13, and each chamber of the individual memory hopper is filled, and then the products are combined and weighed.

Figure 7 is an explanatory diagram of the weighing device of this method [showing two cross-sections], and Figure 8 is a two-dimensional diagram showing the layout of that part of the weighing device in which eight sets of memory hopper units of the same method are installed. With this method, a twin-type packaging machine (
= possible, and as shown in Figure 6 (2), the number of weight values to be combined supplied to the memory hopper unit 15 is 6 at the first time, but each time when combination weighing is started, priority is given from among these weight values. One sea bream is selected as a combination target by a combination calculation and discharged, and the empty memory hopper 52 is used for the next combination weighing (= Because it is refilled, the number of sea bream that can be used at any time is 5, and from this, the next one is Select the combination target weight value and determine the set target weight value.

Weighing hopper to empty memory hopper 4.4'
Although the product with the weight value to be combined can only be received at one location, the memory hopper that is the target of the combination discharges the product and rotates its central shaft to the position to receive the next supply. Weighing hopper 4. The supply chute 15 installed at the bottom of 4' can reduce the time loss, and the memory hopper The shape of the unit 13 is not limited to a cylindrical shape; it may also be a polygonal cylinder with a straight outer periphery, or a triangular pyramid in a state similar to this, and as shown in FIG. A memory hopper with a conical cylinder whose top has been cut off divided by partition plates 12 and 12, and a plate that opens to receive products with weight values for combinations not shown in the figure and closes when it is not necessary. With the method of installing unit 16, the number of combinations each time is about 5 in the case of 6 rooms, which may be difficult for fragile products, but compared to the above method, it is possible to sharpen the sliding angle and speed up weighing. The figure shows the two-dimensional addition of the attachment part of the memory hopper unit 16.The details of the above embodiments have been repeated twice, but in any case, in a combination type weighing device, it is practical to calculate the weight value to be combined. 6@ to 5@ Combination The design is such that the number of weight values to be combined is prepared in order to obtain the set target weight value with the required accuracy, but in this example, 10 sets of weighing units are combined into a single type packaging machine. However, it was overspecified, and we made it compatible with the twin-type packaging machine ζ2, and created two methods: first using 5 sets of weighing units, and then using 4 sets of weighing units. As explained above, the number can be increased or decreased as appropriate depending on the product to be weighed, and in principle, the 11iI combination target weight value is selected from the combination target weight values provided in multiple units for the weighing unit, and this is used as the number of weighing units. At the beginning of this example, 5 fl! Next, we described a method to obtain a set target weight value by combining four feeds, but in the unlikely event that a suitable combination cannot be obtained, it will take time to feed the next time, but one set of weighing units will be used. Even if it happens that two weight values to be combined are selected from the above, or even if the set target weight value is obtained as a result of the combination calculation with less than the number of weighing units, there is no problem in measuring, but it is preferential to select two weight values for the prepared weighing units. The basic idea is to select a combination target weight value for 1 yen from each.

In addition, the planar shape of the pool hopper 3 has conventionally been limited to a parallelogram such as a square or rectangle, but as shown in Fig. Since the product is required to be supplied, there are restrictions on the method of discharging it, but the shape on the plane does not have to be limited to conventional shapes, such as hexagons, octagons, or circles, to ensure an area that does not hinder the supply of products. As mentioned earlier, the volume can be significantly reduced as long as it does not interfere with measurement.In this example, 10 sets of weighing units were used, but depending on the product, 8 sets of weighing units may be used.
It is equally possible to make it a unit or to make it 12 units, and the pool hopper 3
On the other hand, the measurement sensor 7 does not need to be as precise as the combination weighing, so it can be installed in a position that does not interfere with the installation of the distributed supply feeder 6, or it can be installed by machining the tip of the distributed supply feeder 6. It is possible to attach the device using the method described above without hindering the miniaturization of the device.

(Effects of the Invention) As described in detail above, the combination-type weighing device is superior in terms of accuracy and has high capacity for products in a wide range of fields, from snack foods and other products of different shapes or unit weights to agricultural products. The weighing device is basically constructed based on the concept of calculating and combining several randomly weighed combined target weight values to obtain a set target weight value, and its shape and dimensions are also particularly small depending on the target product and weighing weight. As mentioned above, it is understandable that a margin is usually made in consideration of the versatility of the product, but the volume of one popper is unimaginable or impossible due to its operation and structure. 2 liters, sometimes 3 liters, with a capacity that could accommodate the set target weight of one bag were used on a one-time basis.

In order to increase the efficiency of each weighing, the products fed to the dispersion table in the previous process of weighing the weight values of the products to be combined are leveled by a dispersion feeder, and the flow is leveled out in an appropriately determined time unit. A pool hopper ζ2 was supplied and stored, and when the weighing potper was empty, the discharge grate at the bottom was opened and the material was poured in all at once, and after waiting for the shock to subside, it was weighed and this was used as the weight value to be combined.

At that time, from the distribution table, the distribution feeders corresponding to the pool hoppers on the circumference around this table will not be used for all the hoppers each time, but it will be possible to compensate for the empty hoppers that are subject to combinations. The distribution table was not structured to accommodate this, and the distribution table supplied in all directions, including the pool hopper, which was not used each time, so the product was required to be distributed to the distribution feeder corresponding to the pool hopper, which was not used. This process is repeated several times to obtain an appropriate amount, which is then supplied to the pool hopper on an hourly basis (= if it is supplied to the pool hopper, it may be supplied in an amount several times the normal amount, and this also applies to each This was also the reason why the hopper was made to have a thick and safe size, but in the method of the present invention, this time unit is newly installed with a weighing sensor on the pool hopper, and when weighing, the number of combinations is specified first, and this specified number is used. By dividing the set target value and supplying in units of weight so that the weight of each hopper becomes the distributed weight around it, it is possible to avoid over-supplying or under-supplying each pool hopper. The planar dimensions need to be appropriate for the weighing product, but the volume of Ranran is much greater than the conventional method even if the number of weight values to be combined is increased to improve weighing accuracy and capacity. C
; It has the advantage of being able to be made smaller.

This allows the entire weighing device to be built into a shed, which reduces the installation area and weighs a total of 52 products.C;
The supply distance to the weighing device is also shortened, and the distance between the weighing and packaging machines can be widened in the same space, which improves work efficiency and reduces the weight of the weighing device. It is easier to install the weighing device directly on the top with a support, and the stability and balance of the arrangement are also improved. Compared to the previous model, the frame only needs to bear the weight of workers for maintenance and maintenance, and the parts are smaller, and the spacing between the pillars can be widened to reduce the number of columns. Many excellent effects are produced in combination, such as a further reduction in the amount of water used.

In addition, when the weighing device was made smaller by reducing the dimensions of each part using the conventional method, the length of the dispersion feeder was not long enough, which caused problems when feeding products to the pool hopper. This problem can be solved by installing the pool hopper in the direction of speed, and the shape of the pool hopper does not have to be stuck to the conventional square or rectangular shape (hexagonal,
This is done by making a polygon such as an octagon or a trapezoid corresponding to the circumference of the arrangement.1: The tip of the distributed feeder that supplies the product is made to resemble this to prevent scattering to the outside and reduce the number of weight values to be combined. It has the excellent effect that sufficient combination weighing can be performed even with a small and lightweight combination weighing device that is highly accurate and highly efficient.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a perspective view of a measuring unit constituting a basic measuring device of the present invention, FIG. 2 is a sectional view of a measuring device based on the present invention, and FIG. 4 is an explanatory diagram of the principle of the method of increasing the length of the distributed feeder shown in FIG. 3; Figure 5 is a perspective view of the cylindrical memory hopper unit, and Figure 6 is a perspective view of the cylindrical memory hopper unit.
Figure 7 is a cross-sectional view of the cylindrical memory hopper unit weighing device shown in Figure 5, and Figure 8 is a cross-sectional view of the cylindrical memory hopper unit type weighing device shown in Figure 7. A schematic plan view of the attachment part to the weighing device, FIG. 9 is a cross-sectional view of the weighing device equipped with a conical cylindrical memory hopper unit with the top cut off, and FIG. 10 shows the conical memory with the top cut off shown in FIG. FIG. 11 is a perspective explanatory view of an example of a pool hopper having a polygonal shape. 1... Weighing unit 5... Pool hopper 4.4'... Weighing hopper 5.5'... Memory hopper 7... Pull hopper weighing sensor 8... Weighing hopper weighing sensor 13... Tuff shape Memosa memory - hopper unit 1
6 Conical cylindrical memory hopper unit with top cut

Claims (7)

[Claims] (1) In a weighing device using the combination weighing method, specify the number of combinations of target weight values in advance, perform a combination calculation of the weight values to be combined to match that number, and thereby obtain the target weight value. Features: Device and method for combined weighing. (2) When weighing the products that are subject to combination weight values individually in the weighing hopper, the amount of supply to the pool hopper that is carried out prior to this is set as the target weight with the specified number of combinations described in Claims, Paragraph 1. A device and method for combination weighing, characterized in that after dividing and weighing the values, the weight values to be combined stored in each hopper are distributed around the aforementioned divided weight values. . (3) The planar shape and dimensions of each hopper attached to the weighing device of the combination weighing method should be determined according to the product to be weighed, and the volume should be determined within the scope of the claims and the second
The combination according to claim 1, characterized in that the product is miniaturized to the extent that it does not overflow to the outside when the product is supplied from the upper part and discharged from the lower part, considering the bulk specific gravity in the weight stated in claim 1. Apparatus and methods of weighing. (4) Products are supplied to a circular distribution table, and the distribution feeder is first transferred to the pool hopper arranged on the circumference around this table to obtain the combination target weight value, from the pool hopper as necessary. A combination weighing device characterized by being installed not only in the radial direction with respect to the distribution table but also between the tangential side of the outer periphery of the distribution table and the pool hopper. (5) Weighing in a combination method in which two weighing hoppers and two memory hoppers are filled with the products of the weight to be combined, and a pool hopper is attached to these and multiple sets of weighing units are arranged as one unit. For weighing by the device, one combination target weight value is calculated and selected from each prioritized weighing unit each time from among these four combination target weights, and a set target weight value is obtained by this, or an empty value is calculated by the combination weighing. While replenishing the new hopper with new combination target weight values, set to next take out one combination target weight value from each weighing unit from the three unused combination target weight values by combination calculation as in the first time. The target weight value is determined, and the remaining two weight values to be combined are added to the weight value to be combined which has been supplemented during the above period to obtain three weight values, whereby the next combination calculation is performed sequentially in synchronization with the progress of packaging. A combination weighing device and method characterized by obtaining a set target weight value. (6) When weighing products using a weighing device using a combination weighing method, a plurality of weighing units are provided, and the weighing hopper of each unit has a cylindrical shape, a rectangular tube shape, or a similar shape that can rotate around a central axis at the bottom of the weighing hopper. A memory hopper is created by installing partition plates radially from the center, and providing a discharge plate that can be opened and closed at the bottom of the memory hopper.In the case of combined weighing, each weighing hopper is One weight value to be combined is selected from the unit preferentially, the set target weight value is taken out, and the empty memory hopper is placed in the supply section from the weighing hopper by rotating the center axis while the weighing process is in progress. Claim 1 characterized in that the product of the next combination target weight value prepared in the above is supplied and the combination weighing is continued.
2. Apparatus and method for combined weighing as described in Sections 1 and 2. (7) The opening and closing directions of the bottom discharge plate for discharging products from each hopper to the bottom of the combination weighing device are aligned for each weighing unit, and the planar shape is hexagonal, octagonal, or Claim 3, characterized in that the dispersion supply feeder has a polygonal shape such as a trapezoidal shape, and the tip of the dispersion feeder for supplying products for weighing resembles the planar shape of the input part to the pool hopper located below it. , the device and method for combined weighing as described in item 4.