JPH10272315A - Filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent clogging of a filter with dust as a cutting powder remaining after maintenance and make it unnecessary to change filters corresponding to the size and the quantity of a cutting powder, etc., by making a work for removing dust such as the cutting powder from the filter easy. SOLUTION: This filter is for purifying a fluid containing dust, and fibrous bodies 22 composing the mesh of the filter main body 20 are divided into fiber groups 22a positioned in the outer circumferential side of the filter main body 20 and the fiber groups 22b positioned in the inner circumferential side and both fiber groups 22a, 22b are so composed as to alter the size of the mesh by shifting the mutual positions in the circumferential direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter used for purifying and purifying dust such as cutting chips contained in a cutting fluid (fluid) in a processing facility or the like.

[0002]

2. Description of the Related Art Conventionally, a technique disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 17171/1984 is known for this type of filter. In this technique, a filter is formed by covering a net having an appropriate mesh on the outer periphery of a cylindrical body formed by punching metal, and is directed from a cleaning pipe disposed inside the filter to an inner wall of the filter. Clean liquid is spouted. Then, by rotating the filter in the dirty liquid layer, dust such as chips contained in the dirty liquid is captured, and the washing liquid ejected from the cleaning pipe is used to remove chips and the like from the punching metal and the net. Cleaning is performed to remove dust.

[0003]

In the state where dust such as chips is captured by the filter, the punching metal constituting the filter is in a state where chips and the like are pushed into the holes (see FIG. 1). 7), and in the case of a net, chips are entangled in the net (see FIG. 8). For this reason, it is difficult to remove chips and the like from the filter at the time of maintenance, and it is even more difficult if the cleaning is performed with the cleaning liquid ejected from the cleaning pipe. As a result, even if maintenance is repeated, the amount of chips remaining on the filter gradually increases, causing clogging, and the filter must be replaced with a new one.

One object of the present invention is to facilitate the work of removing dust such as chips from the filter body, prevent clogging of the filter due to chips remaining after maintenance, and reduce the size and amount of chips and the like. It is not necessary to replace the filter with an appropriate one.

Another object of the present invention is to enable the size of the mesh of the filter body to be changed by a simple operation.

[0006]

According to the first aspect of the present invention,
A filter for purifying a fluid containing dust,
It is characterized in that the mesh size can be changed.

According to a second aspect of the present invention, there is provided a filter for purifying a fluid containing dust, wherein a thread forming a mesh of the filter body is formed on a thread group located on the outer peripheral side of the filter body and on the inner peripheral side. It is characterized in that it is configured to be able to change the size of the mesh by shifting the mutual phases in the circumferential direction with each other.

According to the first or second aspect of the present invention, dust such as cutting chips can be easily removed from the filter by increasing the size of the mesh when cleaning the filter. Also, by arbitrarily changing the size of the mesh, a mesh size according to the size and amount of dust such as cutting chips can be obtained,
There is no need to replace the filter.

According to a third aspect of the present invention, there is provided the filter according to the second aspect, wherein a pair of slide members relatively slidable in a circumferential direction are provided on at least one end of the filter body. The ends of the two yarn groups are individually connected to the slide member. This allows the mutual phase of both yarn groups to be shifted by a simple operation of merely sliding the slide member, thereby changing the size of the mesh of the filter body.

[0010]

Embodiments of the present invention will be described below. FIG. 1 is a sectional view showing a fixed installation type filter section F1. The housing 10 shown in this drawing
Is located in the middle of the dirty liquid flow path. Inside the housing 10, a cylindrical filter body 20 is incorporated through an opening 11, and the opening 11 is provided with a cap 16.
Sealed. Then, the dirty liquid flowing through the flow path flows from the inlet 12 of the housing 10 to the filter body 20.
, Passes through to the outside, and returns to the flow path from the outlet 14. As a result, dust such as chips contained in the dirty liquid (fluid) is captured by the filter body 20.

FIG. 2 is a cross-sectional view of the filter body 20, and FIGS.
FIG. 4 is a perspective view of the filter body 20. As is apparent from these drawings, the thread 22 forming the mesh of the filter body 20 is divided into a thread group 22a located on the outer peripheral side of the filter body 20 and a thread group 22b located on the inner peripheral side. One end of each of the two yarn groups 22a and 22b is connected to a fixing ring 24 forming one end of the filter body 20. As the thread 22, a stainless steel wire or the like having a predetermined rigidity is used.

The other end of the filter body 20 is
It is constituted by a pair of slide members 26 and 28 which are assembled so as to be relatively slidable in the circumferential direction. That is, one of the slide members 26 has a disk shape, and the other ring-shaped slide member 28 is attached to an inner peripheral portion thereof so as to be relatively rotatable. The other ends of the yarn groups 22a and 22b are individually connected to the slide members 26 and 28, respectively.

Therefore, as shown in FIG. 3B, one of the two slide members 26, 28 is rotated, or both are rotated in the opposite directions to shift each other, so that the two yarn groups 22a, 22b are shifted from each other. 2 (A) and FIG. 3 (A)
As shown in (B), a mesh is formed intersecting. When the filter body 20 in this state is used by being incorporated in the housing 10 as shown in FIG.
Dust such as chips contained in the dirty liquid passing through 0 can be captured.

On the other hand, when dust and the like are to be removed from the filter body 20 during maintenance, the cap 16 of the housing 10 is removed and the filter body 20 is taken out. When the two slide members 26 and 28 are rotated in the opposite direction (the direction in which the displacement is returned), the two yarn groups 22a and 22b are moved to the positions shown in FIGS. 2B and 4A.
As shown in (B), the meshes are released in parallel with each other. In this state, dust such as chips does not easily enter the mesh or cause clogging.
By washing 0, chips and the like are easily removed.

The size of the mesh of the filter main body 20 can be changed to a size corresponding to the size and amount of chips by adjusting the amount of displacement of the slide members 26 and 28 in the rotation direction. That is, conventionally, it was necessary to replace the filter with a different mesh size according to the size and amount of the swarf and the like contained in the dirty liquid.

FIG. 5 is a schematic view showing a backwash type coolant system for processing equipment, and FIG. 6 is a sectional view showing a filter portion F2 used in the backwash type coolant system. First, in the system of FIG. 5, the dirty liquid (cooling liquid) returned from the processing equipment 30 is stored in a dirty tank 31,
The sedimentation of dust such as chips contained in the dirty liquid causes rough separation from the liquid. The settled dust is carried by the conveyor 32 and collected in the chip box 34. On the other hand, the dirty liquid is sent to the clean tank 46 by the dirty pump 36 through the filter section F2 as shown by the solid arrow in FIG.

As shown in FIGS. 6A and 6B, the filter section F2 has a filter body 20 incorporated in a housing 10. The configuration of the filter unit F2 is shown in FIGS.
Since the filter unit is the same as the filter unit F1 shown in FIG. However, the slide member 26 of the filter body 20 in the filter portion F2
Are controlled to rotate in the forward and reverse directions by driving the motor 60. In other words, by displacing the two slide members 26 and 28 from each other by driving the motor 60, the two yarn groups 22a and 22b constituting the thread member 22 intersect as shown in FIG. By returning the displacement of the slide members 26 and 28, the two yarn groups 22a and 22b become parallel to each other as shown in FIG. 6B, and the mesh is released.

As described above, the dirty liquid in the dirty tank 31 is supplied to the clean tank 4 as shown by the solid arrow in FIG.
6, the filter body 20 of the filter unit F2 has a mesh structure as shown in FIG.
Dust such as chips contained in the dirty liquid is captured. The clean liquid that has passed through the filter body 20 and is stored in the clean tank 46 is sent to the processing equipment 30 by a clean pump 48.

When dust accumulates in the mesh of the filter body 20 in the filter section F2, the dirty pump 3
The pressure in the flow path between the filter 6 and the filter unit F2 increases. This pressure is detected by a pressure sensor 38 shown in FIG.
The switching valves 40, 42, and 44 are respectively switched based on the electric signal when the detected value reaches the set value. As a result, the flow path of the dirty pump 36 is changed as shown in FIG.
Are switched as indicated by the dotted arrow. In parallel with this, the motor 60 of the filter unit F2 rotates based on the electric signal from the pressure sensor 38, and the filter body 2
0 indicates the state shown in FIG. 6B, and the mesh is released.

This is the backwashing state of the filter portion F2, and the flow of the liquid to the filter body 20 is opposite to that at the time of filtering, and since the mesh of the filter body 20 is released, the liquid adheres to the filament 22. Dust is easily removed. Then, dust such as cutting chips removed from the filter body 20 is supplied to the tip box 5 shown in FIG.
Collected in 0.

In the coolant system shown in FIG.
In order to adjust the size of the mesh of the filter body 20 as described above, the size and amount of the chips are calculated according to conditions such as cutting in the processing equipment 30, and the filter body 20 for capturing the same is captured. Find the size of the mesh. Therefore, the rotation of the motor 60 is controlled so as to have the mesh size. As a result, the size of the mesh of the filter main body 20 can be automatically changed to a size corresponding to the size and amount of chips or the like, and as described above, there is no need to replace the filter.

As described above, in the present embodiment, dust such as cutting chips can be easily removed from the filter body 20 by increasing the size of the mesh of the filter body 20 or removing the mesh during maintenance, for example. By arbitrarily changing the size of the mesh of the main body 20,
A mesh size corresponding to the size and amount of dust such as chips is obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a fixed installation type filter unit.

FIG. 2 is a sectional view of a filter body.

FIG. 3 is a perspective view of a filter main body.

FIG. 4 is a perspective view of the filter body.

FIG. 5 is a schematic diagram showing a backwash type coolant system for processing equipment.

FIG. 6 is a sectional view showing a filter unit used in the system of FIG. 5;

FIG. 7 is a cross-sectional view showing a state in which chips and the like are pushed into holes of the punching metal.

FIG. 8 is a plan view showing a state where chips and the like are entangled in a mesh.

[Explanation of symbols]

 Reference Signs List 20 filter body 22 thread-like body 22a, 22b thread group 26, 28 slide member

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Makoto Matsui 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation

Claims (3)

[Claims] 1. A filter for purifying a fluid containing dust, wherein the filter is configured to be able to change the size of a mesh. 2. A filter for purifying a fluid containing dust, wherein a thread forming a mesh of a filter body is divided into a thread group located on an outer peripheral side and a thread group located on an inner peripheral side of the filter body. The filter is characterized in that these two yarn groups are configured so as to shift the mutual phase in the circumferential direction to change the size of the mesh. 3. The filter according to claim 2, wherein at least one end of the filter body is provided with a pair of slide members which are relatively slidable in a circumferential direction. A filter, wherein the ends of the two yarn groups are individually connected to a member.