JPH0751636A - Article sorter by weight - Google Patents

Abstract

PURPOSE:To accurately measure the weight of articles to be sorted and to improve the accuracy of sorting according to the weight. CONSTITUTION:A base plate 10 is provided thereon with an electronic balance 12. This base plate 10 is provided with a supporting member 16 in the rear part thereof and is provided with two lifting arms 22, 22 which are lifted up and down by air cylinders. A container 26 is placed on these lifting arms 22, 22. The article sorter is provided with a cover 30 to enclose the electronic balance 12 and the container and is provided with a charging duct 32 atop this cover 30. Classifying ducts 34, 34 are provided on both sides thereof. The articles to be sorted are charged into the container 26, two lifting arms 22, 22 are lowered and the container 26 is placed on the weighing tray of the electronic balance 12, thereby total weight is measured. The one lifting arm 22 is risen to put the container 26 to a tilting posture to make the articles to be sorted glide and fall, and charged into the one classifying duct 34 according to the weight of the articles to be sorted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weight sorter for sorting articles to be sorted according to their weight.

[0002]

2. Description of the Related Art Conventionally, as a technique for selecting an object to be selected according to its weight, there is known one disclosed in, for example, Japanese Patent Laid-Open No. 3-238218. To briefly explain this, when the article to be sorted is transported on the transport conveyor, the total weight of the transport conveyor having a known weight and the article to be sorted is measured in advance to obtain the weight of the article to be sorted. Then, an article removing means such as an air nozzle is provided downstream of the conveyor, and the object to be sorted is excluded from the conveyor by the wind pressure of the compressed air jetted from the air nozzle according to the weight. It is a thing.

[0003]

In the above conventional article sorter, since the weight of the conveyor is large, even if an attempt is made to sort a lightweight article, the weight of the conveyor is more than the variation in the weight of the objects to be sorted. There is a large variation in weight due to the condition of adhesion of lubricating oil and the influence of wind, etc., and accurate selection cannot be performed.

Further, in order to sort defective products such as lack of material (short) and excess (burr) in the plastic parts molded by the injection molding machine by weight, it is possible to more accurately sort the products. Machine was requested.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an article sorter having a weight capable of accurately sorting a relatively light article to be sorted by weight.

[0006]

In order to achieve the above object, the weight-based article sorter of the present invention comprises an electronic scale for measuring the total weight of an object to be sorted and a container on which the item is to be sorted, and an upper part of the container. Position and means for controlling the position to be slid on the weighing pan of the electronic scale and a posture for sliding down the objects to be sorted, a cover surrounding the electronic scale and the container, and provided on the top of this cover A loading duct for placing the objects to be sorted on the container in the upper position, and the objects to be sorted which are provided on both sides of the cover and slide down due to the inclined posture of the container. A sorting duct; and a judgment control unit that calculates the weight of the object to be sorted from the total weight measured by the electronic scale and selects the posture of tilting the container according to the calculation result. ing.

A door that can be opened and closed may be provided on the front surface of the cover.

Further, the input duct may be provided with a shutter that blocks or allows passage of the passage.

[0009]

[Operation] The container on which the objects to be sorted are placed can be made extremely light in weight as compared with conventional conveyors and the like, and the weight of the objects to be sorted can be relatively accurately measured. Further, since the cover is provided to surround the electronic scale and the container, the weight measurement is not affected by wind or the like.

By providing an openable / closable door on the front surface of the cover, the electronic scale, the container and the like in the cover can be appropriately cleaned.

Further, if a shutter is provided in the charging duct, by closing the shutter during the weight measurement, another object to be sorted is not charged into the container, and the invasion of wind or the like can be blocked. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an external perspective view of an article sorter according to the present invention from diagonally above and front, and FIG.
FIG. 3 is an external perspective view from diagonally rearward and upward, FIG. 3 is a vertical sectional view taken along the line AA of FIG. 1, FIG. 4 is a vertical sectional view taken along the line BB of FIG. 1, and FIG. 3 is a flowchart showing an example of the operation.

1 to 4, on the base 10,
An electronic scale 12 capable of measuring weight in mg is installed.
A support member 1 having an opening 14 at the rear of the base 10.
6 is erected. The opening 14 has an opening shape through which the electronic scale 12 with the weighing pan removed can pass. The weighing pan can be easily removed by simply lifting it up. Further, two air cylinders 18, 18 are provided on the rear surface of the support member 16 in the vertical direction, and the air terminal block 2
0 to pipe connection 20a as appropriate. Elevating arms 22 and 22 having a guide mechanism are provided on the piston rods of these air cylinders 18 and 18. Then, the elevating arms 22 and 22 penetrate through vertical elongated holes 24 and 24 provided in the support member 16 and are projected above the electronic scale 12 in front of the support member 16. Furthermore, the electronic scale 12
A container 26 is placed on the elevating arms 22 and 22 above. From the bottom of the container 26, the legs 28, 28
When the elevating arms 22 and 22 are controlled to the lowered position, the container 26 is placed on the weighing pan of the electronic scale 12 and separated from the elevating arms 22 and 22, and one elevating arm 22 And the other elevating arm 22 is in the descending position, the container 26 is prevented from sliding down from the elevating arms 22, 22 when the container 26 is tilted.

A cover 30 made of a transparent member is provided above the base 10 and in front of the support member 16 so as to surround the electronic scale 12 and the container 26. On the upper surface of the cover 30, a cylindrical loading duct 32 for loading the objects to be sorted into the container 26 is provided. Further, sorting ducts 34, 34 are provided on both sides of the cover 30 and directed obliquely downward. These sorting ducts 34, 34 are used for the lifting arm 2
When the container 26 is tilted by the control of Nos. 2 and 22, the objects to be sorted on the container 26 are slid and loaded. A door 36 that can be opened and closed is provided on the front surface of the cover 30. It should be noted that at the raised position of the elevating arms 22 and 22, the container 26 is in a close position without contacting the lower end of the charging duct 32, and at the lowered position of the elevating arms 22 and 22, the container 26 is on the weighing pan of the electronic scale 12. The elevating arms 22 and 22 are controlled so as not to come into contact with the electronic scale 12.

Further, the container 26 measured by the electronic scale 12
And the data of the total weight of the objects to be sorted are given to the judgment control device 38 including a calculation means such as a CPU. An air valve mechanism is also included in the determination control device 38, and the air terminal block 20 is appropriately connected to the pipe 20b and the air pump 40 is connected to the pipe. Further, a start switch 42 is further provided. In FIG. 2, the power source of the electronic scale 12 is supplied from the determination control device 38. In addition, electronic scale 1
Although the weight display data is given to the determination control device 38 from 2 and displayed on the display means 44, the weight display data may be calculated and displayed by the determination control device 38 itself from the measurement data.

Next, the operation will be described with reference to FIG. First, the standard value of the objects to be sorted is set in the judgment control device 38, and the weight of the container 26 is measured in advance.
The air cylinders 18, 18 are controlled so that the two lifting arms 22, 22 are in the raised position, and the container 26 is brought to a position (X position in FIG. 4) close to the lower end of the charging duct 32 (step). In such a state, the charging duct 32
When the objects to be sorted are put into the container 26 and placed on the container 26 and the start switch 42 is operated (step), the air cylinders 18 and 18 are controlled so that the two lifting arms 22 and 22 are lowered together, and the container is 26 is placed on the weighing pan of the electronic scale 12 (Y position in FIG. 4, step). Then, the total weight of the object to be sorted and the container 26 is measured by the electronic scale 12, the weight of the object to be sorted is calculated, and it is determined whether or not the weight is proper from the calculation result (step). Further, depending on the judgment, for example, if it is appropriate, one lifting arm 22 is lifted and the other lifting arm 22 is left in the lowered position to assume an inclined posture such as Z in FIG. 4 to slide down the objects to be sorted on the container 26. The container 26 is charged into one of the sorting ducts 34 (step). If the result of the determination is improper, the raising and lowering arms 22 and 22 that remain in the ascending and descending positions are reversely controlled so that the container 26 is tilted in the opposite direction and the objects to be sorted are placed in the other sorting duct 34. throw into. Then, the raising / lowering arm 22 in the lowered position is raised to bring the container 26 to the X position in FIG. 4 (step), and waits for the next object to be sorted and the start switch 42 to be operated.

By the way, the electronic scale 12 can be pulled out from the opening 14 provided in the support member 16 by removing the weighing pan. Therefore, depending on the total weight of the objects to be sorted and the container 26, it is possible to replace the electronic scale 12 with an optimum weight measurement range. Reference numeral 50 shown in FIG. 2 is a fixing means for fixing the electronic scale 12 to the base 10 so as to be easily separable.

Further, as shown in FIG. 6, the charging duct 3
An appropriate slit 60 may be provided in the middle of 2, and a shutter 62 that can be inserted into and removed from the slit 60 may be provided. The shutter 62 may be configured to be appropriately opened / closed in conjunction with the operation of the activation switch 42, or may be manually opened / closed.

In the above embodiment, the position and inclination of the container 26 are controlled by using the air cylinders 18, 18, but the invention is not limited to this, and a hydraulic cylinder or the like may be used. You may comprise using a motor etc.
Further, the door 36 of the cover 30 is not limited to one-sided opening, and may be a double-sided door or the like. If the cover 30 can be separated from the base 10 relatively easily, the door 36 is not necessary. Further, instead of the operation being started by operating the start-up switch 42, it may be possible to detect that the object to be sorted has been put into the input duct 32 by an appropriate means and start the operation according to the detection signal. Further, if the objects to be sorted are regularly charged, the operation of the device of the present invention may be periodically repeated so as to be synchronized with this.

[0020]

As described above, since the article sorter based on the weight of the present invention is constructed, the following special effects are exhibited.

In the article sorter according to the first aspect of the present invention, the weight of the container can be extremely reduced as compared with the conventional conveyer conveyor and the weight of the article to be sorted can be relatively accurately measured. . Moreover, since the electronic scale and the container are surrounded by the cover,
The weight can be measured accurately without being affected by wind or the like when measuring the weight. Therefore, it is possible to accurately sort the objects to be sorted according to the weight. In particular, it is suitable for sorting lightweight objects to be sorted.

In the article sorter according to the second aspect, since the door is provided on the front surface of the cover, the inside of the cover can be easily cleaned and maintenance is easy.

Further, in the article sorter according to the third aspect of the invention, since the shutter is provided in the charging duct,
By closing during the weight measurement, another object to be sorted is not put into the container in a stacked manner, and the invasion of wind from the feeding duct can be blocked.

[Brief description of drawings]

FIG. 1 is an external perspective view of an article sorter according to the present invention from diagonally above and front.

FIG. 2 is an external perspective view from diagonally above and rearward.

FIG. 3 is a vertical sectional view taken along the line AA of FIG.

FIG. 4 is a vertical cross-sectional view taken along the line BB of FIG.

FIG. 5 is a flowchart showing an example of operation.

FIG. 6 is a partial external perspective view of a charging duct provided with a shutter.

[Explanation of symbols]

 10 Base 12 Electronic Scale 16 Supporting Member 18 Air Cylinder 22 Lifting Arm 26 Container 28 Leg 30 Cover 32 Input Duct 34 Sorting Duct 36 Door 38 Judgment Control Device 40 Air Pump 60 Slit 62 Shutter

Claims (3)

[Claims] 1. An electronic scale for measuring the total weight of an object to be sorted and a container on which the object is to be sorted, and the object to be sorted placed at an inclined position between an upper position of the container and a position on the weighing pan of the electronic scale. Means for controlling the attitude of sliding down, a cover surrounding the electronic scale and the container, and a charging duct for mounting the objects to be sorted on the container in an upper position provided on the cover. The weight of the object to be sorted is calculated from the sorting ducts provided on both sides of the cover and into which the object to be sorted slips due to the inclined posture of the container and the total weight measured by the electronic scale. And a determination control means for selecting a posture for inclining the container according to the result of the calculation, the article sorter according to the weight. 2. The weight-based article sorter according to claim 1, wherein an openable / closable door is provided on a front surface of the cover. 3. The weight-based article sorter according to claim 1, wherein the loading duct is provided with a shutter that blocks or allows passage of the passage.