JPH0260129B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in combination weighers.

A so-called combination weigher is equipped with a plurality of weighing hoppers for weighing supplied objects to be weighed, and selects a set weight or a combination close to the set weight by combining the weighing values of each weighing hopper.

In such a combination scale, efficiency is poor because the combination operation is stopped during the weighing time from when a combination is selected to when the next supplied object to be weighed is weighed.

In addition, as shown in Fig. 9, each weighing hopper _S1 ...
There are models that increase the number of combinations by installing one set of memory hoppers M ₁ ... M ₂₀ below the S ₁₀ to store weighed objects, but even in such combination scales, the empty memory Hopper M ₁ …M ₂₀
The assembling operation is stopped during the time for weighing the objects to be weighed. Furthermore, if the hoppers do not stop, empty memory hoppers M ₁ ...M ₂₀ are combined, which reduces the accuracy of the combination.

The present invention has been made in view of the above-mentioned conventional circumstances, and its purpose is to eliminate the dead time of combination work due to measurement time, shorten the combination calculation time,
Another object of the present invention is to provide a combination scale with excellent combination accuracy.

Such a combination weigher of the present invention is provided with a plurality of sets of two weighing hoppers that alternately weigh supplied objects to be weighed, and each set is provided with objects to be weighed from both weighing hoppers of each set. At least two memory hoppers are installed to store weighed objects.
At the same time, one measurement value from each set of memory hoppers is added to create a combination.
The method is characterized in that a combination of measurement values that reaches a set weight or a weight close to the set weight is selected from among the combinations.

An example of the implementation of the present invention will be described with reference to FIGS. 1 and 4. In the figures, _S1 ... _S12 are weighing hoppers,
Each weighing hopper S ₁ ...S ₁₂ weighs the supplied object to be weighed, and two hoppers are provided as a set, and the weighing operations are performed alternately in principle.

Memory hoppers M ₁ ...M ₁₂ are arranged below each of the above-mentioned weighing hoppers S ₁ ...S ₁₂ , and two memory hoppers are formed into one set, and one set of weighing hoppers, for example, S ₁ , S ₂
is configured so that the object to be weighed can be supplied to any of the memory hoppers M ₁ and M ₂ of the same set.

Memory hopper M ₁ …M ₁₂ is weighing hopper S ₁
...This is a hopper that stores the objects to be weighed in _S12 .

In the combination in the above combination scale, M ₁ ,
Combinations that combine the same set of memory hoppers such as M ₂ or M ₃ and M ₄ shall not be used. This is because one of the weighing hoppers of the same group, e.g. _, S ₁ and S ₂ , always stores a weighed object while the other one is in the process of being weighed. This is because if M ₂ becomes empty at the same time, the object to be weighed cannot be directly supplied.

Select a set weight or a combination of weights close to the set weight from among combinations in which the same group of memory hoppers _M1 ... _M12 do not participate at the same time, and collect the objects to be weighed in the selected memory hoppers. to get the combination.

The operation of the above-mentioned combination weigher will now be explained. In the figure, the ◯ marks in the weighing hoppers S ₁ ... S ₁₂ indicate that the weighing is in progress, and the ◯ marks in the memory hoppers M ₁ -M ₁₂ indicate the empty state.

First, the object to be weighed is fed into all weighing hoppers S ₁ ... S ₁₂ , and after weighing, the corresponding memory hopper is loaded.
At the same time as transferring to M ₁ ...M ₁₂ , a new object to be weighed is supplied and weighed.

Next, as a combination, memory hoppers M ₂ , M ₃ ,
When M ₇ is selected (Fig. 2), the weighing hopper S ₂ ,
S ₃ and S ₇ supply objects to be weighed to memory hoppers M ₂ , M ₃ and M ₇ , and also receive a new object to be weighed and are in the process of weighing (FIG. 3).

The following combinations include memory hopper M ₃ , M ₆ ,
When M ₈ , M ₁₁ is selected, weighing hopper S ₆ , S ₈
supplies the objects to be weighed to the memory hoppers M ₆ , M ₈ , M ₁₁ , and since the weighing hopper S ₃ is in the process of weighing, the weighing hopper S ₄ supplies the objects to be weighed to the memory hopper M ₃ (the Figure 3).

At the time of the next combination, the weighing of the weighing hoppers S ₂ , S ₃ , and S ₇ is completed, and the weighing hoppers S ₄ , S ₆ , S ₈ , and S ₁₁ are in the process of weighing (FIG. 4).

Repeat the above process.

Next, the combination accuracy will be examined based on the number of combinations of the above combination scales.

Most conventional combination scales have 10 weighing hoppers, and the total number of combinations is: ₁₀ C ₁ + ₁₀ C ₂ + ₁₀ C ₃ + ₁₀ C ₄ + ₁₀ C ₅ + ₁₀ C ₆ + ₁₀ C ₇ + ₁₀ C ₈
+ ₁₀ C ₉ + ₁₀ C ₁₀ = 10 + 45 + 120 + 210 + 252 + 120 +
45+10+1=1023.

In this embodiment, since there are no combinations taken from the same group, the number of weighing hoppers is set to 12 to increase the number of combinations. The total number of combinations in this example is ₆ C ₁ ×2 ¹ + ₆ C ₂ ×2 ² + ₆ C ₃ ×2 ³ + ₆ C ₄ ×2 ⁴ + ₆ C ₅ ×2 ⁵ +
₆ C ₆ ×2 ⁶ = 12 + 60 + 480 + 240 + 192 + 64 = 1048.

In this embodiment, there are two more weighing hoppers, but the weighing accuracy is better than the conventional precision, and the weighed object is supplied to the empty memory hopper without waiting time, so it is efficient. Furthermore, since the combination is always made from 12 memory hoppers, there is no loss of accuracy.

For example, in order to obtain a combination efficiency equal to that of this embodiment in the conventional example, if a combination is obtained from the remaining selected combinations, if there are 9 remaining, then ₉ C ₁ + ₉ C ₂ + ₉ C ₃ + ₉ C ₄ + ₉ C ₅ + ₉ C ₆ + ₉ C ₇ + ₉ C ₈ + ₉ C ₉ =
The result is 9+36+84+126+126+84+36+9+1=511, which significantly reduces the combination accuracy.

The arrangement structure of the hoppers in the above embodiments may be arbitrary, such as arranging them in two parallel rows or arranging them circumferentially.

The second embodiment will be explained with reference to FIGS. 5 and 8. The weighing hoppers S ₁ ... S ₁₀ are the same as those of the first embodiment, and are arranged in a circumferential manner.
Memory hoppers _M1 ... _M15 are arranged.
That is, the set of weighing hoppers of the first embodiment, for example, S ₁ and S ₂
A memory hopper is also provided between the S ₃ and S ₄ .

Each weighing hopper S ₁ ...S ₁₀ is located directly below and on both sides.
The object to be weighed can be supplied to the memory hoppers _M1 ... _M15 . Also, weighing hoppers S ₁ , S ₃ ,
The weighing operations of S ₅ , S ₇ , S ₉ and S ₂ , S ₄ , S ₆ , S ₈ , S ₁₀ shall be performed alternately.

In the above embodiment, the weighing hoppers S ₁ , S ₃ , S ₅ ,
When S ₇ and S ₉ are being measured (Fig. 6), memory hoppers M ₁ , M ₂ , M ₃ , M ₄ , M ₅ , M ₆ , ..., M ₁₃ ,
M ₁₄ and M ₁₅ are made into a set, and are immediately supplied from weighing hoppers S ₂ , S ₄ , S ₆ , S ₈ , and S ₁₀ where weighed objects are stored.

Similarly, if the weighing hoppers S ₂ , S ₄ , S ₆ , S ₈ , S ₁₀ are in the middle of weighing (Fig. 7), the memory hoppers
_M15 , _M1 , _M2 , _M3 , _M4 , _M5 ,..., _M12 , _M13 ,
Set M ₁₄ as a group.

In this embodiment, odd numbered weighing hopper S ₁
...S ₉ and even-numbered weighing hoppers S ₂ ...S ₁₀ shall weigh alternately. For example, weighing hopper S ₂ ,
This is because if _S3 were to be weighing at the same time, it would no longer be possible to directly supply the weighed object to the memory hopper _M3 .

In the figure, G ₁ ... G ₁₅ are guides, which are rotatably provided on both sides of the outlet of each weighing hopper S ₁ ... S ₁₀ , and guide the objects to be weighed to the memory hoppers M ₁ ... M ₁₅ . It is something to do. FIG. 5 shows the state in which objects to be weighed are fed to the memory hopper directly below, FIG. 6 to the memory hopper on the right side, and FIG. 7 to the memory hopper on the left side.

To explain the operation of the above embodiment, first, objects to be weighed are fed into all weighing hoppers _S1 ... _S10 ,
After weighing, it is transferred to the memory hopper directly below, and a new object to be weighed is supplied and weighed (Figure 5).

When the objects to be weighed from the even numbered weighing hoppers _S2 ... _S10 are fed to the still empty memory hoppers _M3 , _M6 ... _M15 (Fig. 6), the odd numbered weighing hoppers _S1 ...
The weighed objects are stored in _S9 (Fig. 7).

Weighing hoppers S ₂ ... S ₁₀ are in the process of weighing, and memory hoppers M ₁₅ , M ₁ , M ₂ , M ₃ , M ₄ , M ₅ ... M ₁₂ ,
When a combination is selected from each set of M ₁₃ and M ₁₄ and memory hoppers M ₁ .M ₆ and M ₁₁ are selected, the object to be weighed is placed in the empty memory hoppers M ₁ , M ₆ and M ₁₁ . The objects to be weighed are fed by moving the guides _G1 ... _G15 so as to feed the objects (Fig. 8).

The above operations are repeated.

Considering the total number of combinations in the above example, ₅ C ₁ ×3 ¹ + ₅ C ₂ ×3 ² + ₅ C 3 × ₃ ³ + 5 C ₄ ×3 ⁴ + ₅ C ₅ × ₃ ⁵ =
15+90+270+405+243=1023, the number of weighing hoppers and the accuracy of combination are the same as in the conventional example, and the efficiency of combination is significantly improved.

As described above, the present invention provides a plurality of sets of two weighing hoppers that alternately weigh supplied objects to be weighed, so that each set can be supplied with objects to be weighed from both weighing hoppers of each set. , at least two memory hoppers for storing the weighed objects are provided, and one weighing value is added from each set of memory hoppers to form a combination, and settings are made from among the combinations. Since the combination scale is configured to select a combination of weighing values that yield a weight or a weight close to a set weight, there is no dead time of combination time due to weighing time, and the combination speed is fast and efficiency is high.

Accuracy can be significantly increased by increasing the number of metering hoppers or memory hoppers.

By doing so, we will reach our intended purpose.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the first embodiment of the present invention, Figs. 2 to 4 are explanatory diagrams of the same operation, Fig. 5 is a block diagram of the second embodiment, and Figs. 6 to 8 are explanations of the same operation. Figure, No. 9
The figure is a configuration diagram of a conventional example. In the figure, S ₁ , S ₁₂ ... Weighing hoppers, M ₁ , M ₁₅ ...
...It's a memory hopper.

Claims (1)

[Claims] 1 A plurality of sets of two weighing hoppers are provided to alternately weigh the supplied object to be weighed, and each set is supplied with the object to be weighed from both weighing hoppers of each set. At least two memory hoppers are installed to store the
A combination weigher that creates a combination by adding one weighing value from each set of memory hoppers, and selects from the combinations a combination of weighing values that reaches a set weight or a weight close to the set weight.