JP2007222792A - Tilted grader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tilted grader not affected by static electricity, even if works are minute. <P>SOLUTION: This tilted grader comprises a tilted plate 15 having a carrying face 15a rollingly dropping down spherical matter and vibratingly carrying upward non-spherical matter, and a vibrator 14 vibrating the tilted plate 15. The carrying face 15a of the tilted grader is made of a metallic material with irregularity on the surface. The irregularity is formed by blasting. An ionized air generator 32 blowing ionized air toward the spherical matter and non-spherical matter is provided above the carrying face. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an improvement of a tilt type sorter.

In barrel polishing, both a workpiece and a chip-like grinding stone are placed in a barrel tank, and kinetic energy of rotation and vibration is applied to the barrel tank to deburr and finish the workpiece. After the polishing is completed, the workpiece and the polishing stone are sorted, and there are various sorting methods. For example, if either one of the size of the grinding stone and the workpiece is smaller than the other, a vibrating net sorter that shakes off the smaller one is used. If the workpiece is magnetic, a vibrating magnetic sorter is used by utilizing the magnetism. If neither of these can be used, for example, if both are approximately the same size, an inclined sorter is used with the grinding stone as a spherical object. The tilt sorter will be described in detail as follows.

That is, as shown in FIG. 1, this apparatus has a vibrator 3 attached to the lower part of an inclined sorting plate 1. A spherical object B and a rectangular parallelepiped object M are dropped from a hopper 42, and the vibrating sorting plate 1 is vibrated. The spherical object B rolls into the box at the lower end of the plate, and the rectangular parallelepiped object M is oscillated and conveyed upward and enters the box waiting at the upper end of the plate, and both are sorted. Normally, a rubber plate is attached to the sorting plate to prevent noise and wear of the plate. However, when the rectangular parallelepiped object M becomes very small, it may stick to the surface of the sorting plate due to static electricity and cannot be conveyed by vibration.

Therefore, in the apparatus disclosed in Japanese Patent Laid-Open No. 6-198251 shown in FIG. 1, the sorting plate surface 1 is made of aluminum, and a large number of pores are made in the sorting plate surface 1 by anodizing treatment, so that the contact area between the sorting object and the sorting plate 1 To reduce the effects of static electricity. However, this apparatus may cause corrosion in a large number of fine pore portions, and the anodizing treatment also increases the manufacturing cost. In addition, such a sorting plate could not sufficiently avoid the influence of static electricity.

Japanese Patent Laid-Open No. 6-198251

Accordingly, an object of the present invention is to provide a tilt sorter that is not affected by static electricity even if the workpiece is minute.

In order to solve the above-mentioned problem, the invention of claim 1 is directed to an inclined plate having a conveying surface for rolling down a spherical object and vibrating a non-spherical object upward, and generation of vibration for vibrating the inclined plate. In the tilt type sorter comprising a container, the transport surface of the tilt plate is made of a metal material and the surface has an uneven shape. The invention according to claim 2 is characterized in that the uneven shape is formed by blasting. The invention of claim 3 is characterized in that an ionized air generator for blowing ionized air toward the spherical object and the non-spherical object is provided above the conveying surface.

According to the first aspect of the present invention, even if the workpiece is very small, the conveyance surface is made of a metal material and has an uneven shape, so that the problem that the workpiece adheres to cause a conveyance failure is solved. According to the invention of claim 2, the uneven shape of the conveying surface can be easily formed by blasting, and if the abrasive grain size used for blasting is selected according to the workpiece size, the uneven shape of various roughnesses can be obtained. Can be formed. According to the invention of claim 3, if ionized air is blown from the ionized air generator toward the non-spherical object and the spherical object, a static elimination effect is generated, and the sorting operation can be made more efficient.

A tilt type sorter used in the present invention will be described with reference to FIGS. FIG. 2 is a front view of the tilt type sorter of the present invention. A frame 12 is fixed on the base 11, and a vibration generator 14 is attached to the frame 12 with a vibration isolating rubber 13 inclined at about 5 degrees. It has been. An inclined plate 15 is attached to the upper portion of the vibration generator 14 in parallel with the vibration generator 14, and side walls 16 are erected on both sides of the inclined plate 15 along the conveying direction. The inclined plate 15 and its conveying surface 15a are made of metal, and here are made of aluminum. On the conveying surface 15a, the surface is made concavo-convex by jetting alundum particle size # 80 at a jetting pressure of 0.4 MPa by blasting. The abrasive grain size used in blasting is preferably in the range of # 60 to # 100. If a material having a smaller count than # 60, that is, a material having a large abrasive grain size, is used, a distorted spherical object may rise on the conveying surface 15a because the conveying surface becomes too rough. On the other hand, if a material having a larger count than # 100, that is, a material having a small abrasive grain size is used, the transport surface 15a is worn away by repeated use, and the desired uneven shape is destroyed.

At the lower end of the inclined plate 15, an arc-like lower end wall 17 is connected to both side walls 16 in a plan view of FIG. 3, and a discharge port 18 is formed. The spherical object rolling down the inclined plate 15 is discharged from the discharge port 18. On the other hand, a trapezoidal discharge plate 19 is attached to the upper end of the inclined plate 15 so as to be inclined downward in the transport direction in a plan view of FIG. 3, and the upper end wall 20 surrounds the periphery of the discharge plate 19. Yes. The discharge plate 19 in contact with the upper end wall 20 is cut out in a U shape, and a discharge port 21 is formed. The non-spherical object that is vibrated and conveyed on the inclined plate 15 is discharged from the discharge port 21.

A first sorting plate 22 and a second sorting plate 23 having an area larger than that of the first sorting plate 22 are installed on both side walls 16 on the transport direction side at a position higher than the first sorting plate 22. The first sorting plate 22 and the second sorting plate 23 are both flat plates made of stainless steel, and are concavo-convex by jetting alundum particle size # 80 at a jetting pressure of 0.4 MPa by blasting in the same manner as the transport surface 15a. The first sorting plate 22 and the second sorting plate 23 serve to diffuse spherical and non-spherical materials that are input as a lump. On the outside of the side wall 16, an arm 25 is attached to the both side walls 16 with bolts 26 through its long holes 25a. A receiving plate 24 is attached to the upper end of the arm 25 via a shaft. By loosening the bolt 26, the arm 25 slides along the long hole 25a, and the angle of the receiving plate 24 can be adjusted. .

The base 11 is provided with a hopper mounting base 27, and a charging hopper 28 is provided there. The lower end of the charging hopper 28 faces a charging feeder 29 having a wavy hook, and the charging feeder 29 is vibrated by a vibrator (not shown). That is, the spherical object and the non-spherical object charged into the charging hopper 28 fall on the charging feeder 29, travel along the wavy folds of the vibrating charging feeder 29, and drop onto the receiving plate 24.

Further, a column 30 is erected on the base 11, and an ionized air generator 32 is attached to a horizontal girder 31 that is horizontally mounted from the column 30. The ionized air generator 32 removes static electricity by blowing ionized air to the spherical and non-spherical objects falling on the receiving plate 24. As shown by a two-dot chain line in FIG. 2, the attachment angle of the ionized air generator 32 is appropriately adjusted to blow air. Also, a spherical object receiving box 33 and a non-spherical object receiving box 34 are installed below the discharge port 18 and the discharge port 21 of the inclined plate 15, respectively.

The tilt type sorter having the above configuration is operated. The vibration generator 14 is started, and spherical and non-spherical objects are charged from the charging hopper 28. Then, these fall to the feeding feeder 29 and are conveyed along the wavy bottle. When the spherical and non-spherical objects dropped from the input feeder 29 fall on the receiving plate 24, they are neutralized by being exposed to air from the ionized air generator 32. Then, the spherical and non-spherical objects fall on the second sorting plate 23, and those that gain momentum jump to the first sorting plate 22 and transfer. In response to the vibration from the vibration generator 14, it is diffused on the first and second concavo-convex shaped first sorting plates 22 and the second sorting plate 23, while the spherical objects roll down and the non-spherical objects are vibrated upward. . At this point, both are roughly sorted.

Then, it falls to the inclined plate 15 from both the sorting plates 22 and 23. In the inclined plate 15, since the roughly selected spherical and non-spherical objects are both diffused, the spherical objects roll down and the non-spherical objects are not obstructed by other things. It is vibrated upward. At this time, no matter how small the non-spherical material is, the charge is eliminated in advance, so that it does not stick to the transport surface 15a due to static electricity. Even if the static elimination effect is insufficient, the conveying surface is uneven, so it does not stick. Finally, the spherical object exits from the discharge port 18 and enters the spherical object receiving box 33. One non-spherical object is vibrated and dropped from the discharge port 21 and enters the non-spherical object receiving box 34. In this way, the selection of both is completed.

In the above embodiment, the inclined plate 15 is made of aluminum, and the first sorting plate 22 and the second sorting plate 23 are made of stainless steel. However, the inclined plate 15 is not made of stainless steel or aluminum, and may be a conductor such as other metals. It ’s fine. Further, it is effective to adjust the angle within a range of 0 to 10 degrees by providing an angle adjusting mechanism such as a receiving plate 24 on the first sorting plate 22 or the second sorting plate 23 according to the sorting object.

Conventional tilt sorter Front view of the tilt sorter of the present invention Same top view

Explanation of symbols

14 Vibration generator 15 Inclined plate 15a Conveying surface 32 Ionized air generator

Claims (3)

In a tilt type sorter comprising an inclined plate having a conveying surface that rolls down a spherical object downward and vibrates and conveys a non-spherical object upward, and a vibration generator for vibrating the inclined plate. A tilting sorter characterized in that the conveying surface is made of metal and the surface is uneven. 2. The tilt type sorter according to claim 1, wherein the uneven shape is formed by blasting. The tilt type sorter according to claim 1, wherein an ionized air generator for blowing ionized air toward the spherical object and the non-spherical object is provided above the conveying surface.

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