JPS6130963B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weighing and filling device for weighing powder, granule pellets, lumps, etc. to a predetermined weight and filling them into containers.

As shown in FIG.
00 is dropped into the supply hopper 51 and stored,
An opening/closing shutter 52 is attached to the lower end opening of this supply hopper 51, a measuring bucket 53 is installed below the supply hopper 51, a discharge gate mechanism 54 is attached to the lower end opening of this measuring bucket 53, and a filling chute is installed below the measuring bucket 53. 55 installed,
Empty containers 200 are sequentially conveyed below the filling chute 55, and a weighing mechanism 56 is attached to the weighing bucket 53. In the figure, reference numeral 57 is a steady rest lever for preventing the weighing bucket 53 from swinging, and 58 is a detection mechanism that detects the equilibrium position of the weighing mechanism 56 and operates the discharge gate mechanism 54.

The operating sequence in this conventional device is as follows: fully open the opening/closing shutter 52 (large dispensing process), setting the opening/closing shutter 52 to the dispensing position and controlling time (dispensing process), fully closing the opening/closing shutter 52 after a certain period of time, and balancing the metering mechanism 56. When the position is reached, the detection device 58 detects the equilibrium position of the balance-type measuring mechanism 56, and when the equilibrium position is detected, the discharge gate mechanism 54 is opened, and the filling chute 55 is filled with the filling material 100 weighed to a certain amount. fill the empty container 200 with the filling material 100 from the filling chute 55, fully close the discharge gate 54, move the container 200 filled with the filling material 100, and place the empty container 200 into the filling chute 55. Send it downward.

The above-mentioned is one cycle, and by repeating this cycle, it is possible to sequentially measure and fill the liquid. This one cycle consists of filling 100
To fill 2650g, the bulk dispensing process takes 1.8 seconds, the small dispensing process takes 2.4 seconds, and a fixed amount of 100 g of filling is weighed.
It takes 0.8 seconds to pass from the measuring bucket 53 through the filling chute 55 and fill the container 200, and 0.5 seconds to move the filled container 200 and reset the empty container 200, and it takes 0.5 seconds to complete one cycle. The required time was 5.5 seconds. It has been confirmed that the overall filling accuracy of this conventional device is between ±0.7% and 1.0%. In order to further improve weighing accuracy, it is necessary to take more time for the dispensing process, but taking more time for the dispensing process slows down the weighing speed, making it impossible to improve both accuracy and speed. . In addition, as another conventional example, there is
The one described in the publication is known. This is a measuring bucket equipped with a sub-discharge device in addition to the main discharge port, and the sub-discharge device is equipped with a blade wheel, which rotates the blade when excess material is stored in the weighing bucket. Excess material in the small compartments formed between the two is discharged. Therefore, blocks of material, such as lumps of powder or granular material, tend to enter the compartment between the blades and cause measurement errors, and there is also a risk that the blades may destroy the material, and the destroyed material may not be able to be reused. It was hot too. Furthermore, the scale is vibrated by vibrations caused by the rotation of a drive unit fixed on the weighing unit, which tends to cause errors at the end of weighing. Overall, these conventional examples are still not sufficient in terms of measurement accuracy.

The present inventor repeatedly conducted various experiments to see if it was possible to improve the measuring accuracy by improving the measuring bucket. The measuring bucket 53 in the conventional device is made of materials such as stainless steel, vinyl chloride, and acrylic resin, and the measuring bucket 53 used to weigh 2,650 g of detergent has a capacity of 5,320 g. Therefore, the total weighed amount was 7970 g, which was about three times the amount of 100 fillers (detergent) to be weighed. When weighing 7970 g when the weighing accuracy of the weighing mechanism 56 is ±1/1,000th, the weighing precision was R (range) = 15.9 g and σ (sigma) = 2.7 g. However, the measuring bucket 5
3 is 1500g and when weighing 4150g, the measurement accuracy is R (range) = 8.3g, σ (sigma) = 1.4g
The inventor has found that the measurement accuracy can be improved by about 48%.

The present invention focuses on reducing the weight of the weighing bucket itself in order to improve weighing accuracy, and the measuring bucket consists of a main body and a bag body, and the main body is formed only from a frame assembled into a basket shape. By lining the main body with a bag that is open at both ends and made of a flexible fabric material such as cloth, this weighing bucket has succeeded in reducing weight, improving weighing accuracy, and can be manufactured at low cost and easy to maintain. The object of the present invention is to provide a weighing and filling device equipped with the following.

To achieve the above objects, the present invention provides a metering bucket for storing and metering a filling, a metering mechanism for metering this metering bucket and the stored filling, and a metering bucket for measuring a set value when the metering mechanism indicates a set value. In a weighing and filling device equipped with a discharge gate mechanism that opens a lower end opening and discharges the weighed filling into a container waiting below, the weighing bucket is connected to a main body consisting of a frame assembled in a basket shape and the main body. It consists of a bag with openings at both ends made of a flexible fabric material such as lined cloth, and the bag has a hanging part that hangs down from the main body, and this hanging part can be opened and closed by a discharge gate mechanism. The ejection gate mechanism is equipped with two ejection arms configured in the shape of scissors and a ejection arm drive mechanism that moves the upper ends of these ejection arms in a direction away from each other. The discharging arm drive mechanism is operated to move the upper ends of the discharging arms away from each other with the cross-rotating portion of the discharging arm attached to the main body as the rotation center, thereby closing the hanging portion of the bag body. It is designed to open up.

Hereinafter, preferred embodiments of the present invention will be described.

FIG. 2 shows details of the weighing bucket 1 provided below the supply hopper 51, and the equipment in the process of feeding the filling 100 to the weighing bucket 1 is as follows:
This is exactly the same as before. That is, the present invention also includes a supply conveyor 50, a supply hopper 51, and an opening/closing shutter 52, and the metering mechanism 58 has a different configuration as described later. As shown in FIGS. 3 and 4, the measuring bucket 1 is composed of a main body 2 and a bag body 3, and the main body 2 is formed only of a frame assembled in the shape of a basket, and this frame is made of aluminum or the like. made of light metal or synthetic resin material, etc.
It is designed to be lightweight. The main body 1 is lined with a bag 3 which is open at both ends and made of a flexible fabric material such as cloth. Also, equally divided parts 4 on the side of the main body 2
Measuring blades 4 are attached at certain locations, and these blades 4 are placed on a metering mechanism 5 consisting of a load cell. A hanging portion 31 hanging downward from the main body 2 of the bag 3
is configured to be opened and closed by a discharge gate mechanism 6. This discharge gate mechanism 6 has two scissor-shaped
It is equipped with book ejection arms 7, 7', with the intersecting rotation part A of these two ejection arms 7, 7' as the center,
These lower end portions 71, 71' move toward and away from each other. These lower ends 71, 71'
consists of rotating rollers, roller (lower end) 7
1 includes the lower end 71' of the ejection arm 7'.
It is designed to come into sliding contact with 1'a. Further, the cross-rotating portion A is attached to the main body 2. Springs 8, 8' are attached to the discharge arms 7, 7' located below the cross-rotating portion A to pull the respective lower ends 71, 71' toward each other. The upper ends 72, 72' of the discharge arms 7, 7' are also composed of rollers, and these upper ends 72, 72' are moved away from each other to release the hanging part 31 of the bag body 3 and release the contents in the measuring bucket 1. A discharge arm drive mechanism 9 for discharging the filling 100 is provided.
For example, as shown in FIG. 2, the discharge arm drive mechanism 9 includes first and second racks 91 and 92 and a pinion 93 provided between them, and a drive rod 91a from each rack 91 and 92. . The rack 91 is also given reciprocating motion in the direction of arrow C, and as a result, the drive rods 91a and 92a move the upper ends 72 and 72' away from and toward each other. This configuration of the ejection arm drive mechanism 9 is merely an example, and various other configurations may be adopted.

A magnet 10 is attached to the side surface of the main body 2 of the weighing bucket 1 (in the illustrated embodiment, it is divided into four equal parts), and a magnet 11 that repels the magnet 10 is attached to the side that supports the weighing bucket 1, and both magnets 10, 11
The repulsive action of the weighing bucket 1 is used to prevent the weighing bucket 1 from swaying. These magnets 10, 11 have the function of the steady rest lever 57 of the conventional device shown in FIG.

The overall operation of the present invention is as shown in FIG.
First, a step of supplying the filling material 100 in an amount exceeding the fixed amount to be filled from the supply hopper 51 to the measuring bucket 1 is performed, and then the filling material 100 in an amount exceeding the fixed amount supplied into the measuring bucket 1 is transferred to the weighing mechanism 5 (load cell). to operate the suction nozzle 12, and then the suction nozzle 12 inserted into the measuring bucket 1.
The amount exceeding the fixed amount is sucked out and returned to the supply hopper 51. While the suction nozzle 12 is in operation, the measuring bucket 1
When indicates a fixed value, the operation of the suction nozzle 12 is stopped by the control device 13, and the weighed filling 100 in the metering bucket 1 is discharged into the container 200.
In this way, a weighing method that eliminates the dispensing process performed in conventional devices may be adopted. The weighing and filling method shown in FIG. 5 is detailed in the specification of Patent Application No. 145306 filed in 1982 by the present applicant.

The weight of the measuring bucket 1 (including the discharge arms 7, 7') in the present invention could be 1500 g. Therefore, when weighing 2650 g of 100 fillers, the value to be measured by the weighing mechanism 5 (load cell) is 4150 g, and if the weighing accuracy of the weighing mechanism 5 is ±1/1000, As such, compared to the conventional device, the sigma decreased from 2.7g to 1.4g, and the weight was reduced to 48g.
% improvement was achieved.

A filling 10 to be weighed is placed on the inner surface of the bag 3.
Depending on the type of 0, resin coating may be applied.

As described in detail above, the present invention comprises a measuring bucket consisting of a main body and a bag body, and is formed only by a frame assembled into a basket shape of the main body, and both ends of the main body are made of a flexible fabric material such as cloth. The opening bag is lined with a hanging part that hangs down from the main body, and this hanging part can be opened and closed by a discharge gate mechanism, and the discharge gate mechanism has two scissor-shaped discharge arms. and a discharge arm drive mechanism that moves the upper ends of these discharge arms in a direction away from each other, the lower end of the discharge arm is attached to the hanging part of the bag body, and the bag body is always closed, and the discharge arm drive mechanism is operated. The bag body is characterized in that the upper ends of the discharge arms are moved away from each other with the cross-rotation portion of the discharge arms attached to the main body as the center of rotation, thereby opening the hanging portion of the bag body. . Therefore, the weight of the weighing bucket can be significantly reduced compared to conventional devices, and measurement accuracy can be improved. It is also easy to handle for weighing, easy to maintain and manage, and the bag can be easily replaced. be. In other words, since the weighing bucket consists of a main body consisting of a frame assembled in the shape of a basket, and a bag body with openings at both ends made of a flexible fabric material such as cloth that is lined with the main body, the weight of the measuring bucket itself can be reduced. As the weight was reduced, weighing accuracy also improved. Furthermore, the bag body includes a hanging part that hangs down from the main body, and this hanging part is configured to be openable and closable by a discharge gate mechanism, and the discharge gate mechanism includes a discharge arm and a discharge arm drive mechanism. When storing the filling into the measuring bucket, the hanging part of the bag is closed by the lower end of the discharge arm, and when a certain amount of filling is stored, the discharge arm drive mechanism is activated to open the hanging part of the bag. The weighed filling can be discharged into a container waiting below, and the discharge gate mechanism itself can be simplified and lightened.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional device, and FIG. 2 is a front view of a measuring bucket showing a preferred embodiment of the present invention.
Figure 3 is a front view showing details of the weighing bucket;
The figure is a sectional view taken along the line shown in FIG. 3, and FIG. 5 is a diagram illustrating the overall principle of the measuring method. 1...Measuring bucket, 2...Main body, 3...Bag body, 5...Measuring mechanism, 6...Discharge gate mechanism,
7, 7'...Discharge arm, 9...Discharge arm drive mechanism, 31...Descent portion, A...Cross rotation portion of discharge arm.

Claims (1)

[Claims] 1. A measuring bucket that stores and weighs the filling, a measuring mechanism that measures the measuring bucket and the stored filling, and when the measuring mechanism indicates a set value, the lower end opening of the measuring bucket is opened and waits below. In a weighing and filling device equipped with a discharge gate mechanism for discharging weighed filling into a container, the weighing bucket has a main body consisting of a frame assembled into a basket shape, and a flexible fabric such as cloth lined on the main body. The bag body is made of a material with openings at both ends, and the bag body has a hanging part that hangs down from the main body, and this hanging part can be opened and closed by a discharge gate mechanism, and the discharge gate mechanism is configured in a scissor shape. It is equipped with two ejection arms and a ejection arm drive mechanism that moves the upper ends of these ejection arms in a direction away from each other, and the lower end of the ejection arm is attached to the hanging part of the bag to keep the bag closed at all times. A weighing and filling device configured to operate an arm drive mechanism to move the upper ends of the discharge arms away from each other with the cross-rotation portion of the discharge arm attached to the main body as the rotation center, thereby opening the hanging portion of the bag body. .