KR101778844B1 - Weight solter without sensor conveyor - Google Patents

Abstract

An electronic checkweigher for weighing a sorting article using a load cell,
A metering section 30 which does not rotate in an endless track, a discharge conveyor entrance air cylinder 40, a discharge conveyor 50, and a discharge section 40. The discharge conveyor 10, the metering section entry air cylinder 20, An apparatus 60, a frame 80 including a leg 70 and a wheel (not shown), and the like.
The feed conveyor 10 is characterized in that a partition 110 is formed on the conveyor belt 100 to divide the space at regular intervals and is moved and rotated along the conveyor belt 100, Conveyor (10) The conveyor belt (100) is characterized in that it has a time to stop temporarily during conveyance without being conveyed at a constant speed,
Because weighing is possible with high-precision weighing because weighing with conveyor and sensor conveyor in front of sensor and weighing with ultra-lightweight load cell, selection is possible even on ship on which roaring and pitching exist, and production cost is reduced because it is compact And a sensor conveyor capable of enhancing a replenishment effect is omitted.

Description

TECHNICAL FIELD [0001] The present invention relates to an electronic weighing apparatus in which a sensor conveyor is omitted.

Sensor conveyor, weight sensing device

Inventive Patent No. 10-1242381 Chain conveyor for weighing with open bottom

Utility Model No. 20-0474829 A belt conveyor for weighing with conveying surface space

Patent Application No. 10-2015-0028757 A weighing conveyor equipped with an impact load prevention device

Inventor Patent No. 10-0991029 A checkweigher equipped with a circular dispensing device on the upper side of a chain gear disposed in a plane.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology relating to an electronic check machine to be installed on a ship especially in the field of a checkweigher.

Abalone is an expensive product and it is cultured on the sea, and it is usually shipped to 16 grades. In order to ensure the freshness, a sorting machine is seated on the ship and sorting is done at the same time as catching abalone in a farm.

However, during the sorting operation, the checkweigher is placed on the deck on the boat and is exposed to unstable conditions due to rolling and pitching due to the waves. Due to the shaking of the boat, the electronic checkweigher is (several tens of g) (Hundreds of grams), so it was impossible to use them industrially.

Generally, the electronic weighing machine senses the weight of a selected product as it passes through a sensor conveyor. The conveyor belt rotates in an infinite orbit, and when the measured product passes over the belt, it acts on a load- And converts the physical strain to a digital value to determine the weight of the article passed through the conveyor.

This sensor conveyor, which is a component of the checkweigher, must be suspended or supported on the load cell and will typically maintain a weight of at least 8 kg, including the drive decelerating motor. That is, if a motor with a minimum capacity of 60W is used to drive a sensor conveyor, the weight of the motor is 3kg, the weight of the speed reducer whose deceleration ratio is 1/3 is 1.5kg, the weight of the sensor conveyor is at least 3.5kg,

Since the weight of a normal load cell is about 400 g based on a 10 kg load, a measurement error occurs in the load cell due to inertia applied to the load cell at a weight of at least 8400 g,

When there is a wave coming from a side to side, there is an error of about 3 ~ 4g for a weak rolling and an error of about 10 ~ 20g for a sudden rolling of more than 10cm.

Experiments have shown that an error of about 30 ~ 40g for weak pitching and an error of about 200 ~ 500g for sudden pitching of more than 10cm are encountered when the pitching due to wave is encountered.

This is due to the fact that when the ship is shaken, at least 8400 grams of weight is applied to the load cell, that is, the force of inertia corresponding to 8400 grams is applied to the load cell, causing the load cell to undergo excessive physical strain. Since it is only ~ 200g, it was impossible to apply it to the abalone market which wants to select the weight within an error range of 1g or less.

Therefore, it is a reality to use a low class sorting machine using a spring or a weight such as a fruit sorting machine without using an electronic sorting machine capable of precise measurement by using a load cell, The conventional weight discriminator is also smaller than the electronic weight discriminator when the ship is shaken, but a relatively large error occurs.

If the selected sorting device is re-classified, it will be classified as 5 ~ 6 kinds. If the sorting product is delivered, it will be big in inspection process at the delivery place. There is a problem that troubles occur and this leads to damage of the producer.

The present invention has been made in order to solve such problems,

The present invention provides an electronic weighing machine in which a load cell having only an ultrathin measuring plate instead of a sensor conveyor and a sensor front conveyor is configured to measure the weight of the sorting article.

The present invention provides a technique for omitting the sensor conveyor and the sensor front conveyor in order to minimize the physical strain on the load cell and minimize the inertial force due to the rolling and pitching.

The load cell for 10 ~ 15kg which is usually used for the checkweigher has a weight of about 400g, and the load cell for 30kg which is also used for durability has a weight of about 1300g, the smallest and lightest load cell is 1 ~ 3kg, (However, the load cell for 1 ~ 3kg can not be applied to the sensor conveyor whose weight is over 8kg because the limit capacity is too small)

According to experiments,

A load cell of 10kg had an error of 1g in 3 ~ 4 ° roiling even with a weight of 400g,

A load cell of 10 kg had an error of 3 g at a pitch of 3 to 4 ° with a weight of only 400 g,

The load cell for 30kg had an error of 2g in 3 ~ 4 ° rolling with its own weight of 1300g,

A load cell of 30 kg had an error of 8 g at 3 ~ 4 ° pitching only by its weight of 1300 g,

For 1 ~ 3kg load cell, there was no error in 6 ~ 7 ° rolling by self weight of 45g

The load cell for 1 ~ 3kg had no error even at 10 ~ 12 ° pitching only with its weight of 45g.

In the meantime, according to the present invention, a material such as a PC plate having a thickness of about 150 mm * 150 mm * t2 is fixedly connected to a load cell, or a metal material such as a stainless steel thin plate of about t1 is integrally fixed .

As a result, a weighing device with a weight of about 95g, which is a combination of a load cell and a measuring plate for weighing, is provided so that a servo system for supplying and weighing a sorting article in a state in which a sensor conveyor is omitted is added, And an electron weighing machine capable of precisely performing a sorting operation even on a ship having a pitch of about 10 to 12 degrees.

If the present invention is applied to an on-line overturning job site,

It is possible to perform a high-precision electronic weight screening operation that satisfies an error range of less than 1 g, thereby eliminating the trouble factor between the supplier and the consumer, thereby contributing to the income increase of the fishermen,

If the present invention is applied to screening operations on agricultural land such as dried persimmons having 100 g or less, dry shiitake having a weight of 60 g or less, or raw shiitake,

It is possible to perform a high-precision electronic weight sorting operation satisfying an error range of less than 1 g. Since the conventional sensor conveyor and the sensor conveyor are omitted, the size of the device becomes very compact, There will be a ripple effect on industrial fields such as agriculture and fisheries.

In this case, the existing weight gauges having a weight of at least 8 kg of the sensor conveyor should be at least 10 kg in order to apply more than their weight to the load cell to be applied. It is obvious that it is possible to measure 60g with 1kg load cell more stable and high precision measurement.

Therefore, it is possible to measure more precisely compared with the conventional electronic weighing apparatus, and it is possible to manufacture at a low cost, and it is possible to increase the penetration rate, and it is expected that the difficulty in maintenance can be reduced because the device is omitted, .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a first step of a weighing machine according to the present invention; FIG.
FIG. 2 is a perspective view showing two stages of weighing of the checkweigher according to the present invention. FIG.
3 is a perspective view showing three steps of weighing the weighing machine according to the present invention;

The present invention relates to a feed conveyor (10), a metering section entry air cylinder (20), a metering section (30) that does not rotate in an endless track, a discharge conveyor entry air cylinder (40), a discharge conveyor A discharging device 60, a frame 80 including a leg 90 and a wheel (not shown), and the like.

The frame 80 of the feed conveyor 10 and the discharge conveyor 50 is made of a plate-shaped metal material and the left and right plates are symmetrically symmetrically arranged to form a pair of stay bars 81, And the right side plates integrally joined to each other. The legs 90 are provided on the lower side of the frame 80, and a wheel (not shown) may be provided under the legs 90 for convenience of movement. have.

A conveyor belt 100 running on an endless track is provided inside the frame 80, which is a known technique and will not be described in further detail.

The feed conveyor 10 is provided with a plurality of dividers 110 formed by dividing a plurality of cells at regular intervals on the conveyor belt 100 so as to move and rotate along the conveyor belt 100, The input sorting articles result in reaching the position of the metering section entry air cylinder 20.

The conveyor belt 100 and the partitions 110 may be a conventional rubber belt, but it is more preferable to use a belt and a partition 110 made of a plastic material.

The conveyor belt 100 is constructed so as to have a time to stop temporarily during conveying without being conveyed at a constant speed. The method is roughly applied to the following three methods.

First, the motor of the supply conveyor 10 may use a commonly used geared motor, and the stop time of the conveyor belt 100 may be programmatically operated using an inverter (not shown).

Second, the sensing sensor 120 may be provided on one side of the supply conveyor 10 so that the conveyor belt 100 may be stopped for a predetermined time each time the partition 110 is hit.

Third, the motor of the supply conveyor 10 may be used as a servomotor (not shown), and a drive (not shown) may be connected to operate the stepping operation of the conveyor belt 100 by a desired length.

In this way, the conveyor belt 100 is conveyed alternately with operation and stop. In the side of the supply conveyor 10 close to the direction of the head pulley 130, a weighing part entry air cylinder 20 is mounted, The conveying belt 100 moves forward immediately after the carriage 100 is stopped for a while, and when the carriage 100 moves backward, the conveyor belt 100 immediately starts conveying again.

When the rod of the metering section entry air cylinder 20 advances and pushes the sorting article, the sorting article arrives at the metering section 30.

The metering section 30 has a metering plate 31 which is a lightweight PC plate or a metal plate of a thin plate. The metering plate 31 has a shape in which the end of the entry area where the sorting article enters is bent downwardly, The opposite end of the entry area preferably has an upwardly inclined shape to prevent the selected item from being discharged to the outside.

The lower load cell 32 of the metering plate 31 is connected to the metering plate 31 so as to be integrally fixed with the load cell 32. The load cell 32 is attached to the frame 80 by the bracket 33. [

And the upper surface of the conveyor belt 100 of the discharge conveyor 50 is kept at the same height as the upper surface of the conveyor belt 100 of the supply conveyor 10, The height of the upper surface of the weighing plate 31 is maintained to be the same as or slightly lower than the upper surface of the weighing plate 31,

In order to move to the discharge conveyor 50 after measuring the weight of the sorted goods arriving at the metering section 30, the present invention is characterized in that the discharge conveyor entrance air cylinder And the mill substrate 140 may be attached to the rod end of the metering unit inflow air cylinder 20 so as to easily push out the sorting article.

The discharge conveyor entrance air cylinder 40 is attached to the frame 80 by a bracket 33 and includes a bracket 33 for attaching the load cell 32 and a bracket 33 for attaching the discharge conveyor entrance air cylinder 40 (33) may be fixedly coupled to the frame (80) of the supply conveyor (10), but are illustrated and described herein as being fixedly coupled to the frame (80) of the discharge conveyor (50).

The discharge conveyor (50) and the supply conveyor (10) may be integrally formed as one body, or they may be separately manufactured and then used in the field.

When the weight of the selected item is measured by the metering plate 31, it is pushed by the discharge conveyor entrance air cylinder 40 to be placed on the upper surface of the conveyor belt 100 of the discharge conveyor 50, The discharging device 60 for discharging is operated.

At the moment when the selected item reaches the specific position at which the weight value is set, the corresponding solenoid valve (not shown) is operated and the corresponding scraping air cylinder 61 is operated so that the linear reciprocating motion by the operation of the air cylinder 61 The discharge scraper 63 fixed to the scraping shaft 62 is actuated by causing the rotating movement of the scraping shaft 62 so that the discharge scraper 63 scrapes the selected item and the discharge is completed , These devices are well known in the field of electronic checkweighers and will not be described in further detail.

Hereinafter, the operation of the present invention will be described.

A "B "," C ", "D ", and " E" are arranged as shown in Fig. 1 when one sorting article is manually or automatically inserted between the partitions 110 of the supply conveyor 10.

As soon as the conveyor belt 100 has been conveyed and paused, the sorting article "A" at the position of the metering section entry air cylinder 20 is pushed by the metering section entry and exit air cylinder 20, as shown in FIG. 2, And is then pushed by the discharge conveyor entry air cylinder 40 to be placed on the upper surface of the conveyor belt 100 of the discharge conveyor 50, as shown in FIG. 3,

B "," C "," D ", and" E "move forward one position at a time such that the sorting article" B " It will stop in front of the location.

At this time, the sorting items A to E are metered in a state where they are placed on the metering plate 31, and at the same time, they are not in contact with the mill substrate 140 of the air cylinders 20 and 40 It is measured.

The load cell 32 in which only the metering plate 31 superimposed on only a weight of about 50 g is placed on or suspended from a sensor conveyor (not shown) of at least 8 kg or the like is placed directly on the sorting objects A to E The weighing according to the present invention is capable of detecting an accurate weight within 1 g even if a rolling and pitching motion is performed on a swinging wave. For this reason, the swinging motion of the swinging floor is, of course, It is possible to measure more accurately than any existing electronic checkweigher even on land without.

In other words, the weighing according to the present invention can be carried out under optimal conditions without any external influences which may cause measurement errors after placing the sorting items A to E such as rolled up on the upper side of the fixed measuring plate 31 High precision measurement can be made,

On the other hand, in the conventional electronic sorting machine, since a load of at least 8 kg is already applied to the load cell 32, a small and light sorting product of about 100 g is measured, so that a certain error is likely to occur. Conventional sensor conveyors are required to perform a motion in which a power transmission device such as a timing belt is connected between a motor and a head pulley in order to drive a belt to be rotated in an infinite track so as to pull the head pulley to one side. The residual vibration is generated. When the resonance phenomenon is caused by the combination of the residual vibrations and the amplitude of the vibration is amplified, it sometimes causes a measurement error of about 10 to 20 g.

Therefore, the weighing method according to the present invention is a preferable configuration in which high precision measurement that can not be attempted by any existing electronic sorting machine can be made, and a technical advantageous configuration in which a precise sorting operation is possible even on a boat will be.

The metering plate 31 may be made of various materials and materials having a low specific gravity. However, in the present invention, a transparent PC plate having a thickness of about t3 is applied.

However, a Teflon coating having a low coefficient of friction can be formed by using a thin plate stainless steel having a thickness of about 0.5 to about 1 mm,

In order to facilitate the transfer, the metering plate 31 may be configured to maintain a predetermined angle toward a required direction.

Although the present invention has been described by way of example only as an example of a screening article capable of precise measurement even on a line on which a rowing and a pitching exist, the present invention is not limited thereto.

The present invention relates to a variety of fish, shellfish and dried persimmon including shrimp. It can be applied to all kinds of agricultural products such as raw food.

In the present invention, the mill base plate 140, which is a separate component, is provided at the rod end of the metering portion inflow air cylinder 20 and the discharge conveyor entrance air cylinder 40 so as to be integrally fixed and coupled. (20, 40) can be used as a guide attachment type cylinder,

The metering portion entry air cylinder 20 is a tubular double acting cylinder and the rod is shown to be advanced and retracted in one direction, but the present invention is not limited thereto.

If the weighing part entry air cylinder 20 is provided in both end rod shapes and the center of the feed conveyor 10, that is, the center of the loaded sorting article, And then a pair of the mill substrates 140 are positioned so as to be aligned with the pair of guide plates 81 provided on the upper side of the frame 80,

It is possible to provide a pair of discharge conveyors 50 on the left and right sides as one supply conveyor 10 so that the processing speed of the electronic weighing machine according to the present invention can be further increased.

In addition, all similar but minor variations which attempt to achieve the object of the present invention fall within the scope of the present invention.

The metering section entry air cylinder 20, the metering section 30, the discharge conveyor entry air cylinder 40, the discharge conveyor 50, the discharge device 60,

Claims (2)

An electronic checkweigher for weighing a sorting article using a load cell,
A metering section 30 which does not rotate in an endless track, a discharge conveyor entrance air cylinder 40, a discharge conveyor 50, and a discharge section 40. The discharge conveyor 10, the metering section entry air cylinder 20, A device 60, a frame 80 including a leg 90 and a wheel (not shown), and the like.

The feed conveyor 10 is provided with a plurality of dividers 110 formed by dividing a space at a predetermined interval on the conveyor belt 100 so as to move and rotate along the conveyor belt 100, Characterized in that the sorting articles result in reaching the position of the metering zone entry air cylinder (20)

The weighing unit entry air cylinder 20 is mounted on one side of the feed conveyor 10 close to the head pulley 130 so that the instant rod that has stopped temporarily after the conveyor belt 100 is transported advances, And the conveyor belt 100 is repeatedly started to be conveyed immediately when the conveyor belt 100 is advanced backward and returns to the original state.
The sorting article which has been moved from the supply conveyor 10 to the metering section 30 by the advancement of the metering section inflow air cylinder 20 rod is immediately discharged to the discharge conveyor entrance air cylinder 40 after the weight is measured by the metering section 30. [ And is moved on the upper surface of the conveyor belt 100 of the discharge conveyor 50 for discharging.
The sorting article is placed on the upper surface of the conveyor belt 100 of the discharge conveyor 50, and a corresponding solenoid valve (not shown) is activated at the moment when the selected item reaches a specific place where the weight value is set, The linear reciprocating motion by the operation of the air cylinder 61 causes the rotating movement of the scraping shaft 62 to operate the discharging scraper 63 fixedly coupled to the scraping shaft 62, And the scrapers (63) scrap the sorting article to complete the discharge.

The method according to claim 1,
The weighing part entry air cylinder 20 is provided with both end rods and is provided with a frame 80 by a bracket (not shown) so as to be positioned at the center of the feed conveyor 10, that is, And a pair of the mill substrates 140 are arranged so as to be aligned with the pair of guide plates 81 provided on the upper side of the frame 80,
And a pair of discharge conveyors (50) on the left and right sides as one supply conveyor (10) to further increase the processing speed of the electronic weighing machine.

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