JPH067811U - Filter cleaning device - Google Patents

Abstract

(57) [Abstract] [Purpose] A filter having radial filter media can be reliably cleaned by a simple operation, and the separated deposits can be easily collected. [Structure] The filter 7 can be stored and can be rotatably mounted, the lower case 16 and 17 are provided, and a handle 48 that rotates the filter 7 and impact plates 36 and 37 that contact the filter medium 8 are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a filter cleaning device used in a wire electric discharge machine or the like.

[0002]

[Prior art]

 With the recent advancement of technology, electric discharge machines that perform special machining have come to be widely used in production sites. FIG. 6 shows an electric discharge machine 4 which discharges a workpiece 1 from a machining liquid 2 by means of a machining electrode 3, 5 is a machining power source, 6 is a filter 7 and a pump (not shown). It is a filtration device having. Since the processing liquid 2 has a great influence on the promotion of processing such as insulation, deionization, cooling, removal of processing waste, etc., it must always be kept optimal by the filter 7.

FIG. 7 shows a filter 7 used in FIG. 6, in which a long strip-shaped filter material 8 is inverted and folded at a constant length to form two parallel holes each having a through hole 9. It is a columnar shape that is provided radially between the donut plate-shaped end plates 10. Reference numeral 11 is a band for preventing the filter material 8 from being deformed. Here, the electrode 3 that is consumed during processing, and the slag generated in the processing liquid 2 from the workpiece 1 adheres to the filter material 8 of the filter 7, so the filter 7 was cleaned appropriately to remove it. . The cleaning work of the filter 7 relies on manual work such as, after the filter 7 is dried, scraping off the adhering matter adhering to the filter medium 8 with a spatula or hitting the floor surface with an impact. It was

[0004]

[Problems to be solved by the device]

 Since the conventional filter cleaning work is an artificial work, the filter 7 having the filter media 8 radially arranged cannot efficiently remove the deposits adhering to the inner part near the center. However, the cleaning work is complicated and troublesome, and there are problems that the hands are dirty and the separated deposits are scattered to complicate the collection.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to easily separate the adhered substances while ensuring the cleaning of the filter with a simple operation. It is to provide a filter cleaning device that can be collected.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention takes the following technical means. That is, the present invention is provided with a case capable of accommodating and rotatably mounting a cylindrical filter in which a filter medium is radially provided, and by contacting the filter medium by rotating the filter in the case. It is characterized by the provision of an impact plate to make it work.

Further, the present invention is characterized in that an injection nozzle for injecting a compressed fluid is provided on the outer peripheral surface of the filter medium. Further, the present invention is characterized in that a holding shaft for holding the filter is provided with a fluid supply passage for supplying a fluid inside the filter and forming a fluid flow from the inside of the filter medium to the outside thereof.

[0008]

[Action]

 Since the case accommodates the filter, there is no scattering of the deposits separated from the filter medium, which facilitates the collection. Further, the impact plate is brought into contact with the filter material by rotating the filter to apply an impact, so that the adhered matter is detached or is easily detached. Further, since the filter is rotating, the attached matter is discharged to the outside by the centrifugal force.

The compressed fluid injected from the injection nozzle blows off the deposits on the filter medium and the separated deposits. Further, the fluid supply passage provided in the holding shaft supplies the fluid to the inside of the filter and forms a fluid flow from the inside to the outside of the filter medium, thereby promoting the detachment of the adhered matter.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention, in which 15 is a case capable of accommodating a filter 7 used in a wire electric discharge machine, and an upper case 16 and a lower case 17 which are vertically arranged. It is divided. The case 15 is provided with a hinge 19 on the rear surface of the contact portion 18 of the upper and lower cases 16 and 17, and a snap lock 20 on the front surface so that it can be opened and closed and locked. Further, bearings 22 and 23, which are divided into upper and lower parts, are provided on the left and right side surfaces of the contact portion 18 so as to rotatably hold a holding shaft 21 that supports the filter 7, and the upper bearing 23 is an upper case. 16, the lower bearing 22 is fixed to the lower case 17 by bolts. The upper case 16 has a handle 24 and a rotation direction support plate 25 for the filter 7, and the lower case 17 has a receiving box 26 and casters 27 for collecting the deposits separated from the filter 7, The receiving box 26 is inserted in the lower front part of the lower case 17 so as to be freely inserted and removed.

The holding shaft 21 has a handle engaging portion 28 that transmits a rotational force on one end side, a small diameter step portion 29 and a screw portion 30 that continue to the inside thereof, and a circumferential groove 31 on the other end side. There is. The small-diameter step portion 29 and the circumferential groove 31 are portions that are sandwiched by the bearings 22 and 23 of the upper and lower cases 16 and 17, and the circumferential groove 31 regulates the movement of the holding shaft 21 in the axial direction. Reference numeral 32 denotes a stopper, which is externally fitted inside the circumferential groove 31 of the holding shaft 21, fixed by the set screw 33, and engages with the through hole 9 of the end plate 10 of the filter 7. Reference numeral 34 denotes a fixing member, which fixes the filter 7 by being screwed into the threaded portion 30 of the holding shaft 21 via the spacer 35 which holds the end plate 10.

Reference numerals 36 and 37 denote impact plates, which are fixed to the mounting members 38 and 39 attached to the rear portion of the lower case 17 with screws, and are positioned so as to contact the outer periphery of the filter medium 8 by rotating the filter 7. And at different positions in the rotation direction of the filter 7. Further, the impact plates 36 and 37 are provided at three locations in the axial direction of the filter 7 while avoiding the band 11. The impact plates 36, 37 are made of a flexible material such as soft urethane rubber, and the impact plates 36, 37 are bent by the contact of the filter medium 8 as shown by the alternate long and short dash line in FIG. , To prevent damage. The second impact plate 37 on the lower side has a flexible portion which is shorter than that of the first impact plate 36 on the upper side so as to have rigidity, and when the second impact plate 37 is in contact with the filter medium 8, it is radially adjacent to the filtration plate. The gap 49 of the material 8 is widened to facilitate the discharge of the deposits in the back near the center.

Reference numeral 40 denotes an injection nozzle, which is arranged below the attachment member 38 of the first impact plate 36, penetrates the rear wall of the lower case 17, and is attached to the outer surface of the rear wall of the lower case 17. Is fixed to the outer peripheral surface of the filter medium 8 in the case 15 so as to be capable of injecting compressed air. The nozzle mounting member 41 has a fluid passage 43 communicating with a compressed air generating device (not shown).

In the above structure, when cleaning the filter 7, the dried filter 7 is externally fitted to the holding shaft 21 to which the stopper 32 is attached, and the fixing member 34 is screwed to the screw portion 30 via the spacer 35. After fixing the filter 7 by doing so, the upper case 16 is lifted and the bearing 23 of the lower case 17 carries the circumferential groove 31 of the holding shaft 21 and the small-diameter step portion 29. Then, the upper case 16 is lowered and locked by the snap lock 20, the handle 48 is engaged with the engaging portion 28 of the holding shaft 21, and the filter 7 is rotated in the direction of the arrow of the rotation direction instruction plate 25. At this time, since the impact plates 36 and 37 come into contact with the filter material 8 of the filter 7 and the impact is applied to the filter material 8, the deposit adhered to the surface of the filter material 8 is detached or easily detached.

The attached matter is discharged to the outside by the centrifugal force generated by the rotation of the filter 7, naturally falls due to gravity, and is collected in the receiving box 26 of the lower case 17. Furthermore, the compressed air jetted from the jet nozzle 40 blows off the deposits separated by the impact plates 36 and 37 and the deposits on the filter medium 8 to ensure more reliable cleaning. FIGS. 4 and 5 show a second embodiment of the present invention, which corresponds to claim 2. The difference from the first embodiment is that the holding shaft 21 and the handle engaging portion 28 are A fluid supply path composed of a hollow portion 44 formed from the end face on the opposite side toward the handle engaging portion 28 in the axial direction, and a through hole 45 formed outward from the hollow portion 44 in the radial direction. 46 is provided, and a rotatable nipple 47 that communicates with a compressed air generator (not shown) is connected to the hollow portion 44. Others are common to the first embodiment, and therefore a common part is provided. Are indicated by common symbols.

In the second embodiment, air is supplied to the inside of the filter 7 to form an air flow from the inside of the filter medium 8 to the outside thereof, so that the detachment of the adhered matter is further promoted. The impact plates 36, 37 may be appropriately increased or decreased in number in the rotational direction and the axial direction, and in order to drive the holding shaft 21, a drive device using a motor instead of the handle 48 is used in the case 15. It may be provided. Further, instead of the receiving box 26 that collects the separated adhered substances, a suction device provided outside the case 15 can be connected, and the case 15 can be made compact.

[0017]

[Effect of device]

 According to the first aspect of the present invention, there is provided a case capable of accommodating and rotatably mounting a cylindrical filter in which the filter medium is radially provided, and the filter medium is rotated in the case. Since it is characterized by the provision of an impact plate for contact with the filter, it is possible to reliably clean the adhering matter that has adhered to the filter medium with a simple operation, and to collect the separated adhering matter collectively. You can

According to the second aspect of the present invention, in addition to the above-mentioned constitution, the injection nozzle for injecting the compressed fluid is provided on the outer peripheral surface of the filter medium, so that the adhered matter is blown off. Can be cleaned more reliably. Further, according to the invention of claim 3, in addition to the structure of claim 1 or 2, the holding shaft holding the filter is supplied with fluid inside the filter to form a fluid flow from the inside to the outside of the filter medium. Since it is characterized in that the fluid supply path is provided, the separation of the adhered matter can be promoted and the cleaning can be performed more reliably.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of FIG.

FIG. 3 is a cross-sectional view of the main parts of FIG.

FIG. 4 is a cross-sectional view of an essential part showing a second embodiment of the present invention.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a diagram illustrating the use of a filter.

FIG. 7 is a perspective view of a filter.

[Explanation of symbols]

 7 Filter 8 Filtering material 15 Case 21 Holding shaft 36 Impact plate 37 Impact plate 40 Injection nozzle 46 Fluid supply

Claims (3)

[Scope of utility model registration request] 1. A case is provided which is capable of accommodating a cylindrical filter in which a filter medium is radially provided and which can be rotatably mounted, and which is brought into contact with the filter medium by rotating the filter in the case. A filter cleaning device characterized in that an impact plate is provided. 2. The filter cleaning device according to claim 1, wherein an injection nozzle for injecting a compressed fluid is provided on the outer peripheral surface of the filter medium. 3. A holding shaft for holding a filter is provided with a fluid supply passage for supplying a fluid inside the filter and forming a fluid flow from the inside of the filter toward the outside thereof. Filter cleaning device.