KR20150131553A - Sorting apparatus for fruit - Google Patents

Abstract

The present invention relates to a fruit and vegetable weight grader. More specifically, the fruit and vegetable weight grader: continuously sorts objects by a mechanical cam diagram structure without separately including a sensor, an ejector, or the like, thus a sorting process is accurately and rapidly performed; and automatically departs the objects such as fruits, vegetables, and the like from a rotating table according to weight by centrifugal force to sort the same. In order to achieve the above object, the fruit and vegetable weight grader according to the present invention comprises: tables installed to be rotated; a plurality of trays which are installed to be height adjustable according to the weight of objects with respect to the rotary arms, and include rotary arms which are hinged to the outside of the table and installed to be tilted outwardly, and support rods in which the objects are placed on the upper portion thereof and guide rollers are included on the lower portion thereof; and a guide rail which is installed on the lower portion of the table along the rotation path of the trays, and includes a first inner wall unit which restricts the trays not to be tilted when the guide rollers are accommodated and contacted with the trays, and a plurality of second inner wall units which are connected to the first inner wall unit, and formed to have inner paths with respect to the first inner wall unit. In the guide rail, height of bottom portions of the second inner wall units are formed to be sequentially lowered along the rotation direction of the tables, thus contacts of the guide rollers with the first inner wall unit are released according to the weight of the objects when the trays pass through the second inner wall units, then a corresponding tray is tilted outwardly to sort the objects by weight.

Description

[0001] SORTING APPARATUS FOR FRUIT [0002]

The present invention relates to a weighted fruit and vegetable sorting apparatus,

More specifically, objects such as fruits and vegetables are removed from the rotating table by a centrifugal force so that sorting of objects is continuously performed by a mechanical cam line structure without any separate sensor or ejector, so that the sorting operation can be performed accurately and quickly The weight of the fruit vegetable selecting apparatus is automatically selected according to the weight.

In general, selection of objects such as fruits and vegetables is an important task for improving the value of a product. The classification of fruits is determined according to various sorting conditions such as size, weight, shape, color, flavor, taste, There are several kinds of sorters that have been developed.

Particularly, the weight type fruit and picking apparatus is a device for sorting fruits and vegetables according to their weight and sorting them. The conventional weight type sorting apparatus is composed of a sorting plate 11 are arranged at regular intervals on the chain 12 and are intermittently conveyed by the chain 12 and a plurality of weight sensors 13 are provided at a predetermined interval below the chain 12, ) To measure the weight of the fruit (10).

However, since the conventional weight sorting apparatus as described above has a structure in which the weight of the chain 12 is added when measuring the weight of the fruit 10, it is difficult to precisely discriminate the fruit due to the error of the measured value depending on the tension of the chain 12 Especially fruit of a small weight such as strawberry or plum have a weight not exceeding an error range so that it is impossible to precisely sort out the fruit and thus the kind of fruit that can be selected is limited.

In addition, since the conventional weighing scioning apparatus is configured to intermittently drive the weight of the weighing pan 13 when the weighing plate 11 is placed on the weighing sensor 13, the weighing speed is greatly reduced.

As a conventional technique for solving the above problems, Korean Patent Laid-Open No. 10-2007-0008750 (January 18, 2007) entitled " Fruit sorter and sorting method thereof "

[0003] The above-mentioned prior art discloses a conveyor belt which is installed in a double row at regular intervals in a "V" shape, a gravimetric belt installed parallel to the conveyor belt for measuring the weight of fruit being conveyed, A fruit sensor for detecting the weight of the fruit placed under the measurement frame, a fruit separation belt for separating the distance between fruits by delaying the transfer of the fruit to be introduced into the weighing belt, a fruit ejector for dropping fruit from the transfer belt, A rotary encoder for detecting the sorting position of the fruits, and a controller for comparing the weight data of the fruit detected from the weight sensor with the preliminarily stored weight classification grades to discriminate the fruit selection position, And a control unit for selecting fruit by driving the fruit ejector when the selection positions specified in the selection screen are matched.

However, the above-mentioned prior arts have a drawback in that the fruit, that is, the ejector for releasing the sorting object, the rotary encoder for detecting the sorting position, and the control unit for driving the fruit ejector to separate the fruit in the detected position, With the introduction of the driving structure, it is complicated and difficult to manufacture the sorting device, and the manufacturing cost is increased.

Particularly, it is necessary to enlarge the sorting device according to a complicated driving method, and there is a problem that space restriction is large in installation of the sorting device, and productivity is deteriorated due to occurrence of frequent faults according to introduction of electronic equipment.

Accordingly, the present invention has been made to solve the above-mentioned problems,

The weighted fruit and vegetable sorting device is miniaturized and the sorting operation is made of a mechanical structure to improve the stability and reliability of operation. Accordingly, the centrifugal force of the table is changed according to the weight of the object, The object of the present invention is to provide a weighted fruit and vegetable selection apparatus capable of automatically selecting objects.

In particular, it is an object of the present invention to provide a weighted fruit and vegetable selection apparatus capable of sorting all types of objects regardless of the kinds of fruit or vegetables, and thus being versatile and efficient, and easy to use.

In addition, the present invention is also applicable to a case where a tray on which an object is placed passes through a sorting section composed of a second inner wall portion so that the tray is inclined outwardly so that a sorting operation is accurately and quickly performed on a relatively light object, Weight fruit vegetable selection apparatus which can be forced to be weighted.

Further, according to the present invention, since the trays are automatically lifted up after the objects to be laid out are sorted and removed, the operation of the sorting device is continued without stopping, so that the trays can be automatically returned The present invention also provides a weighted fruit and vegetable selection apparatus comprising the elastic means.

The present invention is also directed to a method of making a tilting motion of a tilting arm smoothly connected to each other when a trail passes through a section having a second inner wall portion having an inner path than a first inner wall portion that restricts the tilting of the trail, The second inner wall portions are formed in a streamlined structure so as to prevent breakdown and breakage of the apparatus, and particularly to prevent the tilting of the tray and the upright returning operation of the trays continuously without stopping, And to provide a weighted fruit and vegetable selection apparatus equipped with the same.

In order to achieve the above object, a weighted fruit and vegetable selection apparatus according to the present invention comprises:

A table installed to rotate;

And a support bar hinged to the outside of the table and installed to be tilted outwardly, a support bar provided with an object on its upper side and a guide roller on its lower side, and a height varying with the weight of the rotary car depending on the weight of the object A plurality of trays; And

A first inner wall part installed along a rotation path of the trays at a lower portion of the table and restricting the tray from tilting when the guide roller is received while being contacted with the first inner wall part; And a guide rail having a plurality of second inner wall portions formed to have an inner path,

The guide rails are provided such that the height of each of the bottom portions of the second inner wall portions sequentially decreases along the rotation direction of the table so that when the trays pass through the second inner wall portions, The contact with the first inner wall portion is released, and the tray is tilted to the outside, whereby the object is sorted by weight.

In addition, in the weighted fruit and vegetable selection apparatus according to the present invention, the tray further includes a weight attached to the outer side of the weight.

Further, in the weighted fruit and vegetable selection apparatus according to the present invention, the tray further includes elastic means for elastically supporting the support bar in the upward direction.

In the weighted fruit and vegetable selection apparatus according to the present invention, the second inner wall portions are formed in a streamlined structure to be gently connected to the first inner wall portion in the rotation direction of the trays.

The weighted fruit and vegetable selection apparatus according to the present invention employs a mechanical structure in which objects such as fruits and vegetables are automatically sorted by centrifugal force according to the rotation of the table, thereby making it very easy to manufacture, maintain and manage the sorting apparatus, There is an advantage that it is possible to supply a sorting device capable of sorting various kinds of objects at low cost.

In particular, the weighted fruit and vegetable selection apparatus according to the present invention is installed in such a manner that the trays on which the object is placed are tilted outward, and the tilting rollers of the trays are prevented from tilting so that the upright and tilting operations of the trays are realized. A second inner wall portion formed to have an inner path than the first inner wall portion to allow the trays to be tilted as the contact between the first inner wall portion and the guide roller is released so that the object is sorted, The bottom of the table is sequentially lowered along the rotation direction of the table so that the grades according to the weight of the object are subdivided and sorted and discharged so that the sorting accuracy and reliability are very high and the sorting criterion It is very versatile and effective because it can be easily adjusted and used.

Furthermore, since the weighted fruit and vegetable screening apparatus according to the present invention performs screening work through a simple mechanical structure, it is possible to miniaturize the screening apparatus, to have an excellent operation stability and reliability, to require an electronic sensor and an ejector having a complicated structure It is possible to prevent frequent failure and malfunction of the sorting device.

In addition, the weighted fruit and vegetable selection apparatus according to the present invention stably arranges the trays on which the object having the corresponding weight is tilted in the outward direction,

Since the tray support bar is resiliently supported by the elastic means, the tray is automatically raised and returned after sorting the object. Therefore, the sorting operation is performed by continuously inputting the object without the need to time the sorting device, .

Further, according to the weighted fruit and vegetable selection apparatus of the present invention, when the second inner wall portion having a streamlined structure is introduced, the trays are stably tilted when passing through the second inner wall portion, and the sorting operation is performed at an accurate position, And the upright is smoothly guided by the second inner wall part, so that failure and breakage of the screening device can be prevented.

1 is a view for explaining a conventional weighted fruit sorting apparatus.
2 is a plan view of a weighted fruit and vegetable selection apparatus according to the present invention;
3 is a cross-sectional view taken along the line A-A 'in Fig. 2, Fig. 3 is a cross-sectional view taken along line B-B' in Fig. 3C is a cross-sectional view taken along line C-C 'of FIG. 2;
FIG. 4 is a front view of a weighted fruit and vegetable selection apparatus according to the present invention; FIG.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

 In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

In describing the weighted fruit and vegetable screening apparatus according to the present invention, when it is specified by reference to FIG. 3 and FIG. 4 that the approximate direction reference is not rigid for convenience, the direction in which the gravity acts is the lower side, Determine left and right.

In particular, in FIG. 2, the direction of the insertion portion in which the object is to be inserted is defined as the front, and the front and back are divided in the order of performing the sorting operation in the rotational direction of the table, Unless otherwise specified, directions are specified in accordance with this standard.

Hereinafter, a weighted fruit and vegetable selection apparatus according to the present invention will be described with reference to the accompanying drawings.

2 to 4, the weighted fruit and vegetable selection apparatus according to the present invention mainly comprises a main body 10 having a table 11 installed to rotate in a support frame 13, And a guide rail 30 for restricting the upward and downward tilts of the trays 20, as shown in FIG.

2 and 4, a drive means 12 such as a motor is provided at the center of the support frame 13 so that the upper table 11 is continuously rotated in one direction.

4, the leg portion 13A of the support frame 13 is provided with a wheel portion 14 for moving and installing the main body 10, A support 15 is provided so that the height of the main body 10 can be adjusted so that the position of the main body 10 can not be changed during the sorting operation by raising the main body 10 so that the wheel portion 14 does not come into contact with the ground.

The wheel unit 14 is installed so as to be pivotable with respect to the leg unit 13A so as to be able to change the direction of the body unit 10 and the support unit 15 is screwed to the fixing unit 13a of the leg unit 13A And the height thereof is adjusted by a nut (not shown) so that the main body 10 is fixed.

As shown in FIGS. 2 and 3, the table 11 connected to the driving means 12 rotates is provided with a plurality of shaft portions 11A spaced apart at predetermined intervals along the outer end thereof, 11A are hinged to the trays 20 and can be tilted outwardly by centrifugal force.

A guide rail 30 is provided on the lower side of the table 11 along the outer circumferential surface of the upper frame 16 and in particular along the rotation path of the trays 20 to guide the rotation of the trays. (30) is provided with a space in which a guide roller (24) of the trays (20) is accommodated inside in an upper opened form.

When the table 11 is hinged to the inside of the swash plate 21 formed in the horizontal direction on the shaft 11A of the table 11 and the swash plate 21 is rotated by the centrifugal force, As shown in Fig.

In addition, a tubular body 23 formed in a vertical direction is fixed to the rotary arm 21, and a support rod 22 is inserted into a hollow portion of the tubular body 23 and coupled.

The tubular body 23 is provided with an elastic means 27 for elastically supporting the support bar 22 in an upward direction and a plate 25 on which an object can be placed is coupled to the upper portion of the support bar 22 And a guide rod 22 which is guided and rotated by being in contact with the inner wall portions 31 and 32 and the outer wall portion 34 of the guide rail 30 is provided at a lower portion of the support rod 22, (24).

Therefore, when the object is placed on the plate 25 rotating at one side of the main body 10 and the object input portion 10A, the support bars 22 of the trays 20 are lowered according to the weight of the object, Lt; / RTI >

Meanwhile, the guide rail 30 includes an outer wall portion 34 for allowing the inner and outer ends of the guide rollers 24 to be in contact with each other while the support rods 22, i.e., the tray 20 is rotated upright, The first inner wall part 31 and the second inner wall part 31 are connected to the first inner wall part 31 and the first inner wall part 31 in the respective discriminating sections S1 to S7 of the guide rails 30. [ And a plurality of second inner wall portions (32) formed,

The guide rails 30 are provided such that the heights of the bottom portions 33 of the second inner wall portions 32 are sequentially lowered along the rotational direction of the table 11, The contact between the guide roller 24 and the first inner wall portion 31 is released according to the weight of the object placed when passing through the inner wall portions 32 so that the tray 20 is tilted outwardly, To be selectively discharged.

3 (A), the guide rail 30 has a section where the objects are not sorted, that is, a section N in which the trays 20 are rotated upright (see FIG. 2 The first inner wall portion 31 and the outer wall portion 34 are formed in the rotational direction over the entire upper and lower portions so that the object is placed and the guide roller 24 The inner and outer ends of the guide roller 24 are separated from the first inner wall portion 31 and the outer wall portion 34 by the variable height or the height at which the guide roller 24 is raised and returned while the object is selected and discharged. So that the trays 20 are held in an upright state.

The first inner wall part 31 is formed so as to coincide with the path in which the trays 20 are rotated in the upright state so that the guide roller 24 contacts the first inner wall part 31, As shown in Fig.

As shown in FIGS. 3B to D, the guide rails 30 are provided at the bottom portion of the second inner wall portion 32 having an inner path from the first inner wall portion 31, (33) are sequentially lowered in height,

If the lowered height of the guide roller 24 is lowered or displaced to a position lower than the height of the bottom portion 33 of the corresponding sorting section according to the weight of the object placed on the tray 20, 24 are in contact with the first inner wall 31, the tilting of the rotary rock 21 is limited, and the object is not picked up and discharged,

When the lowered height of the guide roller 24 is lowered or displaced only to a position higher than the height of the bottom portion 33 of the discriminating section, the guide roller 24 passing the discriminating section is disengaged from the first inner wall portion 31 The rotary arm 21 is tilted outwardly by the centrifugal force and is contacted with the second inner wall portion 32 so that the tray 20 is inclined at an angle so that the object of the tray 25 is separated and discharged do.

For example, as shown in FIG. 1, it is assumed that the sorting apparatus of the present invention classifies objects into seven grades by weight,

When the weight of the lightest object is selected as S1 and the weight of the lightest object is selected as S2,

3, the height h1 of the bottom portion 33 of the second inner wall portion 32 of the first sorting section S1 (see Fig. 2) is the height of the object of the lightest weight w1 Only the tray 20 on which the object of the weight w1 is placed in the first selecting section S1 is formed to have a height relationship with the descending height d1 of the guide roller 24 and h1 & As shown in [C] of Fig. 3, the tray 20 on which the object having the weight of w2 heavier than the object of w1 is placed, the guide roller 24 is lower than h1 The guide roller 24 of the tray 20 contacts the first inner wall 31 of the first sorting section S1 and is not tilted. , ≪ / RTI >

3, the height h2 of the bottom 33 of the second inner wall 32 of the second sorting zone S2 (see Fig. 2) is then the height h2 of the light weight w2 The height of the descent height d2 of the guide roller 24 and the height relationship of h2 <d2 <h1 are formed so that the tray 20 in which the object of the weight w2 is placed in the second sorting section S2 (The tray 20 on which the object having the weight of w1 is placed in the second selection interval S2) is selected and discharged in the first selection interval S1 State, the tray 20 may be inclined)

The height of each of the bottom portions 33 of the second inner wall portion 32 of the third to seventh discrimination intervals S3 to S7 (see FIG. 2), not shown in the drawing, The object is separated from the tray 25 and sorted and discharged in a sorting interval corresponding to the sorting reference weight while one tray 20 makes one rotation.

Therefore, the sorting apparatus according to the present invention does not require a separate weight sensor or a structure of an ejector or the like for rotating the tray 20 of the corresponding weight or for directly hitting the object to be separated from the dish 25, It is possible to miniaturize the sorting device by miniaturizing the sorting device, and it is possible to perform mechanical sorting similar to the cam-guiding structure without introducing the electronic sorting means, so that the sorting operation can be performed constantly regardless of external factors. In particular, It is very convenient to be able to play at least.

According to the selection device of this structure, the number of the second inner wall portions 32 is selected and manufactured according to the size of the table 11 or the number of selected grades according to the choice of the manufacturer or the purchaser, Can be used as a sorting device.

Also, as shown in [A] to [D] of FIG. 3, the tray 20 of the present invention further includes a weight 26 coupled to be offset in the outward direction.

The weight weight 26 is a member having a predetermined weight or more and is mounted on the support rod 22 or the tube body 23 in such a manner as to be biased toward the outer side of the table 11 so as to load the tray 20, S1 to S7 (see FIG. 2)) is added to the centrifugal force to assist in tilting the tray 20 outwardly.

The weights 26 are provided to be exchangeable with respect to the trays 20 at different weights to balance the weight of the trays 20.

That is, when a fruit (for example, an apple) having a weight equal to or greater than a certain weight is selected, the weight 20 having a small weight such that the tray 20 on which the object is placed is tilted outward in the sorting section, To support the discharge of fruit,

When selecting vegetables that are lighter than fruits (for example, onions), since the average weight of vegetables is smaller than that of ordinary fruits, a weight weight having a weight greater than the weight of the fruits installed at the time of sorting fruit is installed in the tray 20, It is ensured that the guide roller 24 of the tray 20 is lowered by the height of the second inner wall portion 32 of the first sorting section S1 so that even if a relatively light weight object is selected, So that the object can be selected and discharged according to the weight when passing through the selection section.

This is because the lowered height of the guide roller 24 when the object is placed on the plate 25 is lower than the height of the bottom of the second inner wall portion 32 of the first sorting interval S1 Is not formed as much as the forming height of the first separating section (33), so that all the objects are discharged in the first separating section (S1)

On the contrary, in the case of selecting a relatively heavy weight vegetable, the lowered height of the guide roller 24 when the object is placed on the plate 25 is smaller than the height of the bottom of the second inner wall portion 32 of the seventh sorting interval S7 Is formed to be lower than the height of the portion (33) to prevent all objects from being discharged.

At this time, since the total number of grades of weight selecting objects of relatively light weight is inevitably less than the total number of grades of weight selecting objects of relatively heavy weight, two or more selection sections are used as one weight class selection criterion (For example, the objects selected in the first and second screening sections can be identically selected by one weight class).

Accordingly, the present invention can be used to sort all kinds of objects such as fruits, vegetables, etc., regardless of the average weight of the objects, by changing the weights of the weights 26 with different weights.

The weights 26 are desirably attached to the upper ends of the lower support bars 22 of the dish 25 in consideration of the inclination of the tray 20 to the outside, The height can be different.

3, the elastic means 27 elastically supporting the support bar 22 in the upward direction allows the plate 25 to be automatically returned to its original height after the object is selected and discharged, So that the object can be placed continuously on the tray 25 of the tray 20 which is rotated by one turn from the tray 10A.

In the figure, a coil spring 27A, which is built in the tube 23 and resiliently supports the support bar 22 in the upward direction, is typically used as the elastic means 27, Respectively.

In addition, it is preferable that the present invention is capable of supporting a function of balancing the descent height of the support rod 22 like the weight weight 26 by allowing each of the elastic means 27 to be replaced with another elastic force.

In addition, the guide roller 24 also has height adjustment means for varying the initial engagement height with respect to the support bar 22 so as to adjust the height thereof, so that the support bar 22 is lowered in accordance with the kind of the object to be sorted, It is more preferable that the tray 20 is selectively tilted in each sorting interval according to the weight of the object so that the objects are sorted and discharged.

2, the present invention is characterized in that the trays 20, which are erected or tilted when the table 11 is rotated, are rotated (rotated) so as to improve operational stability and prevent failure and breakage, And a second inner wall portion 32 of a streamlined structure connected to the first inner wall portion 31 in a gentle slope direction.

That is, in the section N that is not the selection section, the guide rails 30 are not formed with the second inner wall portion 32 and only the first inner wall portion 31 and the outer wall portion 34 are formed So that the upper portion of the first inner wall portion 31 is gradually inclined inwardly and connected to the second inner wall portion 32 having the inner path in each of the sorting intervals S1 to S7. by doing,

The guide rollers 24 of the upright tray 20 are continuously rotated along the guide rails 30 in contact with the first inner wall 31,

The guide roller 24 of the inclined tray 20 is tilted outwardly along the second inner wall portion 32 while being in contact with the second inner wall portion 32 of the streamlined structure, The tray 20 is tilted at a maximum angle at the point where the inner depth of the tray 32 is largest (the center of the second inner wall 32 of the streamlined structure) And is then discharged at a gentle angle again by the second inner wall part 32, passes through a section which is not the next selection section after being returned,

The impact applied to the second inner wall portion 32 when the tray 20 is tilted in each sorting section and the impact applied to the first inner wall portion 31 while the tray 20 is standing up The operation stability of the sorting apparatus can be ensured.

In order to shorten the screening time of the object, a configuration for preventing the breakage and failure of the component parts due to an impact on the trays 20 and the guide rails 30 when the table 11 rotates at a relatively high speed to be.

Although not shown in the drawings, the present invention can be applied not only to the case where an object is directly placed on a dish 25 manually rotated by an operator in the object input section 10A, but also when an object supply section 10A is provided with an automatic feeding device (not shown) So that the object can be automatically inserted,

A separate reservoir (not shown) in which the object is stored outside each screening section of the table 11 or a selected object to be automatically transferred for another sorting operation (for example, color of the object, presence or absence of scratches, etc.) It is more desirable to further provide a transfer means (not shown) (for example, a conveyor apparatus) to realize the automation of the sorting operation.

In addition, the present invention is characterized in that the tray (20) is prevented from being unintentionally detached by the centrifugal force in a state where the tray (20) is not inclined, (Not shown) at this time, the release preventing jaw may be protruded to a height at which the object is detached when the tray is tilted.

While the present invention has been particularly shown and described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the details of the specific embodiments, And substitutions are to be construed as falling within the scope of protection of the present invention.

10: main body 11: table
11A: shaft portion 12: driving means
13: Support frame 14:
15: Support
20: Tray 21:
22: support rod 23: tubular body
24: guide roller 25: plate
26: Weight weight 27: Elastic means
30: guide rail 31: first inner wall part
32: second inner wall part 33: bottom part
34: outer wall portion

Claims (4)

A table installed to rotate;
And a support bar hinged to the outside of the table and installed to be tilted outwardly, a support bar provided with an object on its upper side and a guide roller on its lower side, and a height varying with the weight of the rotary car depending on the weight of the object A plurality of trays; And
A first inner wall part installed along a rotation path of the trays at a lower portion of the table and restricting the tray from tilting when the guide roller is received while being contacted with the first inner wall part; And a guide rail having a plurality of second inner wall portions formed to have an inner path,
The guide rails are provided such that the height of each of the bottom portions of the second inner wall portions sequentially decreases along the rotation direction of the table so that when the trays pass through the second inner wall portions, The contact with the first inner wall portion is released, and the tray is inclined outward, so that the object is sorted by weight. The method according to claim 1,
Wherein the tray further comprises a weight attached to be biased in an outward direction. The method according to claim 1,
Wherein the tray further comprises an elastic means for elastically supporting the support bar in the upward direction. 4. The method according to any one of claims 1 to 3,
Wherein the second inner wall portions are formed in a streamlined structure that is gently connected to the first inner wall portion in the rotation direction of the trays.

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