JP2580482B2 - Filtration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration device, and more particularly to a cutting device which is used in metal cutting and contains cutting chips, is separated into cutting chips and cutting oil and reused. It relates to a filtering device which enables it.

[0002]

2. Description of the Related Art Conventionally, a cutting oil which contains chips after use of metal cutting has been separated into chips and cutting oil to make it reusable (hereinafter referred to as purified cutting oil). To tell)
There have been proposed many filtration devices for obtaining the same. Tokuhei 2
Japanese Patent Application Publication No. 44456/1992 discloses an example of an improved filter device, in which one end of the filter drum is floated in cutting oil to reduce the load on the bearing of the filter drum. Thus, the filter drum is driven to rotate lightly.

Further, according to the "filtration apparatus" of Japanese Utility Model Application No. 1-31997, in a cutting oil containing cutting chips to be filtered (hereinafter referred to as a cutting oil to be filtered), for example, during lathe processing. The floating swarf that has become a continuous spiral and has buoyancy in the state of containing air and is floating on the oil surface,
A device for sedimentation in the cutting oil to be filtered has been proposed. According to this device, if the floating chips are left as they are, the floating chips will grow and expand more and more, preventing the possibility of damaging the filter wound around the outer periphery of the filter drum. It is to do.

[0004] Referring to the drawings, the device and the above-mentioned device will be described. FIG. 5 is a plan view showing a part of a filtering device, excluding a cover and the like. In this drawing, a filter drum 300 has a shaft 301 supported on a left side plate 102, while a filter drum 300
Are rotatably supported by at least one of the left and right chains 10 and 11 meshed with a sprocket (not shown) provided on the outer peripheral surface of the filtration drum 300. By obtaining, the arrow D3 in the figure
It is configured to rotate in the direction.

On the outer peripheral surface of the filtration drum 300, a stainless wire mesh, a chemical fiber mesh, a wedge wire,
A filtration filter 302 made of perforated metal or the like is wound and fixed so as to be exchangeable, and the cutting oil to be filtered is passed through the filtration filter 302 to be filtered to obtain purified cutting oil. It is configured to flow out into the inside 101.

An injection pipe 145 for jetting purified cutting oil toward the filter 302 is provided in the filter drum 300.
Is provided, and the so-called back washing is performed by the filter 302.
By doing so, the clogging of the filtration filter 302 is eliminated to enable a continuous filtration action. On the other hand, between the left and right chains 10 and 11, a scooping plate 12 for sending out the settled chips in the cutting oil to be filtered toward the upstream is fixed at a predetermined interval, and the chips are moved upstream. It is configured to be transported and discharged toward.

[0007] Further, on the outer peripheral surface of the filter drum 300, a floating chip for obtaining buoyancy in the cutting oil to be filtered and floating on the oil surface to settle in the cutting oil to be filtered. The powder scooping plate 131 is fixed, and the filter drum 30
The floating chips are settled with the rotation in the direction of the arrow D3 of 0, so that the floating chips are prevented from growing and expanding, and the risk of damaging the filter 302 is prevented. .

According to the above-described filtering device, the driving force of the rotating filter drum 300 which is rotated while one end is in a floating state can be reduced, and the scooping plate provided at a predetermined interval between the left and right chains 10 and 11 can be provided. According to 12, while the chips in the cutting oil to be filtered are transported a sufficient distance toward the upstream, the cutting oil is sufficiently removed from the chips, and damage to the filter due to floating chips is prevented beforehand. It has been confirmed that there is an advantage that it can be prevented.

[0009]

However, according to the above-described filtering apparatus, referring to FIG.
0 denotes a shaft 30 whose one side is fixed to a filtration drum.
1, an annular member (not shown) provided on the right side plate 103 while being supported by the bearing of the left side plate 102 on the other side.
Because it is supported rotatably in the floating state,
A gap H1 must be provided between the left side plate 102 and one side of the filtration drum 300.

Similarly, the right side plate 103 and the filtration drum 3
Therefore, a gap H2 must be provided between the gap H00 and the gap H00. In the gaps H1 and H2 thus provided,
Chips enter, but if they enter in large quantities, the rotation of the filter drum is constrained between the left and right side plates, resulting in an excessive drive load on the filter drum. Since the drum may be stopped, a safety device for stopping the driving of the filtration drum must be provided.

Further, due to the action of the floating chip scooping plate 131, the floating chips that should originally settle in the cutting oil to be filtered flow upstream through the gap H1 in the direction of the arrow in the drawing. Backflow sometimes occurred. Therefore, the filtration device of the present invention has been made in view of the above points,
The purpose is to reduce the driving force of the filter drum and prevent the filter drum from becoming overloaded,
An object of the present invention is to provide a filtration device capable of continuous operation.

Further, in addition to the above objects, the cutting oil is sufficiently removed from the chips to prevent the filter from being damaged due to the floating chips, to prevent the load from being excessively loaded, and to further raise the surface. It is an object of the present invention to provide a filtration device that can prevent chips from flowing backward and that can reduce costs and facilitate maintenance and inspection by using a common drive source with a filtration drum.

[0013]

Means for Solving the Problems and

In order to solve the above-mentioned problems and achieve the object,
According to the present invention, there is provided a filtering apparatus for filtering chips from filtered cutting oil mixed with chips and cutting oil to obtain purified cutting oil, wherein the purified cutting oil soda stores the purified cutting oil. A cutting oil storage soda to temporarily store the cutting oil to be fed through the inlet, and a liquid surface of the cutting oil stored in the excessive cutting oil storage soak. By dividing into two parts upstream and downstream without a gap between the inner wall surface of the over-cutting oil storage soda, floating chips do not reach the downstream side, and a floating state in the filtered cutting oil storage soda. A sealing member rotatably provided with a filter means for filtration on the outer peripheral surface, and a side opening partly opened on at least one surface to allow the purified cutting oil after filtration to flow out to the purified cutting oil soda. Backwash the filtration means from the inside of the filtration drum and the filtration drum And a scooping means disposed at a predetermined interval to continuously convey the chips from the upstream side to the downstream side of the input port and to drop the chips from the chip discharge port. As a feature, the filter drum is provided rotatably in the floating state, so its driving force can be reduced and it is provided without gaps, preventing intrusion of chips and preventing the filter drum from becoming overloaded Work to be able.

[0014] Preferably, floating chip sedimentation means for sedimenting chips floating on the liquid surface of the cutting oil to be filtered is fixedly provided on the outer peripheral surface of the filter drum to prevent the expanded chips from growing. To prevent the filter from being damaged by the floating chips. Further, preferably, the filtered cutting oil storage soda is formed to be inclined obliquely upward from a middle portion from the upstream to the downstream, and provided with a chip discharge port at the uppermost portion,
By disposing the scooping means along the filtered cutting oil storage soda, it works so that the cutting oil is sufficiently removed from the chips.

[0015] Preferably, a V-shaped seal or a plate-shaped seal is used as the seal member so as to work to eliminate the gap between the cleaning oil soda and the filtration drum. Preferably, the scooping means is meshed with a sprocket and a guide member disposed in the filtered cutting oil storage soda, a drum sprocket fixed to the filtration drum, a sprocket and a drum sprocket, and the guide member , And a single drive means for driving the sprocket, thereby making the filter drum and the drive source common, thereby facilitating cost reduction and maintenance.

[0016] Also, preferably, there is provided a filtering device for filtering chips from filtered cutting oil in which chips and cutting oil are mixed to obtain purified cutting oil, wherein the purified cutting oil stores the purified cutting oil. Ca soda, formed to be inclined diagonally upward from the middle part from upstream to downstream to temporarily store the filtered oil to be fed through the inlet, and provide a chip discharge port at the uppermost part A cutting oil storage soda to be filtered arranged along the swarf scooping means, and a liquid surface of the cutting oil to be filtered stored in the oil cutting soda to be filtered, By dividing into two parts, upstream and downstream, without any gap between the inner wall surface of the storage soda and the floating cutting chips, it is possible to prevent the floating chips from reaching the downstream side and rotate in a floating state in the filtered cutting oil storage soda. A V-seal for free installation and filtration means for filtration are provided on the outer peripheral surface. A filtration drum having a side opening opened at least on one side to allow the purified cutting oil after filtration to flow into the purified cutting oil soda, and for sedimenting chips floating on the liquid surface of the filtered cutting oil. Floating chip sedimentation means fixed to the outer peripheral surface of the filtration drum, injection means for back washing the filtration means from the inside of the filtration drum, and chips from the upstream side to the downstream side of the input port. A sprocket and a guide member disposed in the filtered cutting oil storage soot so as to be continuously conveyed, drop chips from the chip discharge port, and share a drive source with the filter drum. A drum sprocket fixed to the filtration drum, an endless chain meshed with the sprocket and the drum sprocket, and guided by the guide member, and the sprocket. And a scooping means having one moving means for moving the filter, the driving force of the filter drum can be reduced, the cutting oil is sufficiently removed from the chips, and the filter The filter drum can be prevented from being damaged, the filter drum can be prevented from being overloaded, and the floating chips can be prevented from flowing back. To facilitate.

[0017] Preferably, there is provided a filtering device for obtaining a purified cutting oil by filtering chips from a filtered cutting oil in which chips and cutting oil are mixed, wherein the purified cutting oil stores the purified cutting oil. A soda, a filtered cutting oil storage soda that temporarily stores the filtered cutting oil supplied through an inlet, and a liquid surface of the filtered cutting oil stored in the excessive cutting oil storage soda. Is divided into an upstream side and a downstream side without a gap between the inner wall surface of the over-cutting oil storage soda to prevent floating chips from reaching the downstream side, A sealing member rotatably provided in a floating state, a filtering means for filtering provided on an outer peripheral surface, and a side opening opened on at least one surface to allow the purified cutting oil after filtration to flow to the purified cutting oil soda. A plurality of filtration drums having Injecting means for back-washing the filtering means from the inside of the ram, and a predetermined distance for continuously transferring chips from the upstream to the downstream of the inlet and dropping the chips from the chip outlet. The driving force of the filtration drum can be reduced, the cutting oil can be sufficiently removed from the chips, and the filtration filter can be prevented from being damaged by the floating chips. Can be prevented from being overloaded, and furthermore, the floating chips can be prevented from flowing back, and the filter drum and drive source can be used in common to reduce costs and facilitate maintenance and inspection. To improve the purification efficiency.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of a filter device according to a first embodiment, in which a cover and the like are removed so that an internal main configuration can be seen. In this figure, the installation cutting leg 1 is fixed to the four corners of the cleaning cutting oil soda 1 which forms the base of the entire apparatus. Purified cutting oil is temporarily stored in the soda 1.

Inside the purified cutting oil soda 1, a filtered cutting oil storage soda having a common bottom surface and a part of the bottom surface is configured to store the filtered cutting oil. But,
For this purpose, the left side plate 2 and the right side plate 3 (a part of which is indicated by a two-dot chain line) are made liquid-tight and fixed by welding or the like continuously from the bottom surface and the front wall surface of the cleaning oil soda 1. The components described below are generally provided with the left and right side plates 2 and 3 as attachment portions.

First, the left and right side plates 2 and 3 are provided such that the back side of the apparatus is downstream and the front side of the drawing is upstream as shown in the figure, and the downstream side has a shape extending obliquely upward as shown in the figure. At the top of the cage, a swarf discharge port 4 shown by a broken line is formed between both side plates, and is configured to drop swarf into a swarf collection box 9 moved below the swarf discharge port 4. ing.

The most upstream sides of the left and right side plates 2 and 3 are formed so as to be provided substantially side by side with the side walls of the cleaning oil soda 1.
The upstream side (the front side of the apparatus) of the filtration drum 30 that is rotatably held between the left and right plates 2 and 3 as described later.
, An opening 8 opened upward is formed so that the cutting oil to be filtered can be appropriately fed into the filtering oil storage soda through the opening 8.

Next, a bearing (not shown) is disposed at an obliquely upper portion downstream of the left and right side plates 2 and 3, and rotatably supports a sprocket shaft 17 to which a pair of left and right upper sprockets 18 is fixed. ing. Also, this sprocket shaft 1
7 is connected to an output shaft 16 of a drive motor 15 fixed to the left side plate 2 and integrally provided with a reduction gear.
Can be driven continuously in the clockwise direction.

On the other hand, bearings (not shown) are similarly arranged on the most upstream side of the left and right side plates 2 and 3 and on the near side in the drawing.
A sprocket shaft 29 to which a pair of left and right lower sprockets 28 are fixed is rotatably supported. The upper sprocket 18 and the lower sprocket 28 provided as described above
Between the endless left chain 10 and the right chain 11, some of which are shown by dashed-dotted lines in FIG.
Are assembled with each other in a meshed state. The left chain 10 and the right chain 11 are guided substantially along the left and right side plates 2 and 3 as shown in the drawing, while the direction of the chain is set so as to apply a rotational driving force to the filtration drum 30 on the way. An upper chain guide 20 and a lower chain guide 21 are fixed at the conversion portion, and a drum chain guide 22 is fixed on the opposing surfaces of the left and right side plates 2 and 3 on the upstream and downstream sides of the filtration drum 30, respectively.

On the other hand, at predetermined intervals between the left chain 10 and the right chain 11, a predetermined number of scooping plates 12 for sending out the settled chips in the cutting oil to be filtered toward the upstream are fixed. The cutting oil is conveyed and discharged upstream, and while the chips in the cutting oil to be filtered are transported a sufficient distance toward the upstream of the above-described chip discharge port 4, the cutting oil is removed from the chips. Make sure that they are sufficiently removed.

A drum sprocket 34 is fixed to the outer peripheral surface of the filter drum 30. The rotation power is obtained from the left chain 10 meshed with the drum sprocket 34, thereby turning the filter clockwise. It is configured to move. On the outer peripheral surface of the filtration drum 30, a filtration filter 44 made of a stainless steel wire mesh, a chemical fiber mesh, a wedge wire, a punching metal, or the like is fixed so as to be exchangeable in a wound state. After passing through 44 and filtering to obtain purified cutting oil, a circular opening 5 drilled in the left side plate 2 or a semicircular opening 6 shown in broken line in the right side plate 3 in the cleansing soda 1. Through the outlet.

On the other hand, an injection pipe 45 connected to a pipe 46 and a pump 47 for jetting the purified cutting oil toward the filtration filter 44 is provided in the filtration drum 30. By performing so-called reverse washing on the filtration filter 44, clogging of the filtration filter 44 is eliminated, thereby enabling continuous filtration. further,
On the outer peripheral surface of the filter drum 30, a floating chip scooping plate 31 for obtaining buoyancy in the cutting oil to be filtered and floating the cutting chips floating on the oil surface in the cutting oil to be filtered. Is fixed, and with the rotation of the filter drum 30 in the clockwise direction, the floating chips are settled in the cutting oil to be filtered,
Floating chips are prevented from growing and expanding to prevent the risk of damaging the filter 44.

According to the above-described filtering apparatus, the scooping plate 12 provided at a predetermined interval between the left and right chains 10 and 11 receives the driving force from one driving motor 15 which is a common driving source. Since both drums 30 can be driven, the configuration can be made inexpensively. Further, since the input port 8 of the cutting oil to be filtered can be set at a low position, the input operation is facilitated, and chips are discharged from above the collection box 9 having a relatively high dimension via the chip discharge port 4. Since it can be configured to be dropped, a very rational layout can be realized.

FIG. 2 is a sectional view taken along the line AA of FIG. In this figure, the same reference numerals are given to the components already described in FIG. 1 and the description is omitted, and the support state of the filtration drum 30 is mainly described. Is fixed by welding or the like to the annular guide member 40 extending toward the storage soda of the cutting oil to be filtered. In addition, a mounting plate 41 having a semicircular opening 6 and fixing an injection pipe 45 is fixed to the right side plate 3 using a plurality of bolts and nuts 14. Similarly, an annular guide member 40 extending to the filtered cutting oil storage soda side is fixed by welding or the like so that the filter drum 30 formed as a separate part can be set to the assembled state shown in the drawing. I have.

On the other hand, the filtration drum 30 is formed so as to have a predetermined width by integrally welding the annular left and right base portions 27 using a plurality of pipe members 26, and to form a drum on the outer peripheral surface of these base portions 27. Sprocket 34 and guide part 32
Are fixed to each other, and are configured to engage and guide the left and right chains 10 and 11. The floating swarf scooping plate 31 is fixed to the base 27 using the bolt and nut 14, while the filter 44 is also fixed in a wound state stretched between the bases 27.

Next, in the filtration drum 30 configured as described above, each base 27 is inserted and supported in a loosely fitted state with each guide member 40, while the edge of each base 27 of the filtration drum 30 is For example, a rubber seal member 33 called a V-seal is fixed, and the seal portion 33a is
And the wall of the mounting plate 41.

By constructing and supporting the filtration drum as described above, the filtration drum 30 is kept in a floating state as the liquid level L1 of the cutting oil to be filtered rises, and the clockwise rotating power is reduced. The floating chips are settled in the cutting oil to be filtered by the action of the floating chip scooping plate 31, thereby preventing the floating chips from growing and expanding and damaging the filter 44. To prevent that.

The filtering drum 30 is connected to the left and right side plates 2, 3
Since there is no gap and is rotatably provided between the three using the seal member 33, it is possible to completely prevent the floating chips from entering the downstream side. FIG. 3 is a side view showing an essential configuration of the filtration device described above, and shows an operation diagram. In this figure, if an unexplained component is described, an inclined plate 7 inclined as shown in the figure is provided on the upstream side in the vicinity of the chip discharge port 4 to finally remove the cutting oil from the chip. Like that. In addition, the scaffold 13 is provided on the inclined portion to facilitate inspection and the like.

Referring to the drawing, the operation of the filtration device will be described. The cutting oil to be filtered is introduced from the introduction port 8, and the filtration drum 30 is brought into a floating state. Subsequently, when a switch (not shown) is turned on, the upper sprocket 18 starts rotating in the direction of arrow D1 in the drawing, and as a result, the left and right chains 1
0 and 11 also move in the direction of arrow D2, are turned in a substantially horizontal direction by the upper chain guide 20, and are made to mesh with the outer peripheral surface of the filtration drum 30 by the drum chain guide 22 or with the drum sprocket 34. By being guided, the filtration drum 30 is driven in three directions by arrows in the figure. Further, the directions of the left and right chains 10 and 11 are further reversed at the lower sprocket 28, and are guided toward the downstream side in the direction of arrow D4 in the figure and further toward the obliquely upward arrow D5 direction at the lower chain guide 21. .

Before and after this series of operations, the pump 47 is activated, and the cleaning oil is jetted from the jet pipe 45 toward the filter 44 to perform reverse washing.
After a predetermined time has elapsed from the above operation, the purified cutting oil is washed and stored in the purified cutting oil soda 1 so as to rise to the liquid level L2. In this series of operations, the liquid level L of the cutting oil to be filtered is
1, among the floating chips F1 and F2, the floating chips F1 floating on the inlet 8 side of the cutting oil to be filtered.
Is completely prevented from being mixed with the floating chips F2 floating on the downstream side of the filtration drum 30. Further, the floating chips F1 and F2 are settled in the cutting oil to be filtered by the action of the floating chip scooping plate 31, thereby preventing the floating chips from growing and expanding and damaging the filtration filter 44. Can be prevented. In addition, since the filter drum 30 rotates in a state where the seal portion 33a of the seal member 33 is in close contact with the left and right side plates 2 and the wall surface of the mounting plate 41, no excessive load is generated and continuous operation is possible. The combination of a belt conveyor that continuously supplies the cutting oil to be filtered and a collection box that continuously carries out the chips enables unmanned continuous operation.

Next, a second embodiment will be described with reference to the side view of FIG. In this figure, the same components as those already described are denoted by the same reference numerals, description thereof will be omitted, and only the different features will be described. Are provided as described with reference to FIG. Further, a second injection pipe 145 is provided inside the second filtration drum 50, and is configured to perform back washing of the filtration filter.

According to the filtering device constructed as described above, the purifying action is doubled at least by the addition of the second filter drum 50. Therefore, in addition to the above-described working effects, the conveying speed of the left and right chains is increased. Can be doubled. Further, even if one of the filtration drums is completely clogged, a certain purification action can be expected. Further, although not shown, a third filtering drum can be further added to realize a more effective purifying action.

It should be noted that the present invention is not limited to the above-described configuration, and each configuration can be appropriately designed and modified.
The left and right side plates 2 and 3, which occupy a relatively large area, the purified cutting oil soda 1 and the like constitute an outer skeleton portion, and are formed by appropriately welding an iron plate having a predetermined thickness. You may comprise so that a filtration filter may be fixed to a monolithic thing. Furthermore, the injection direction of the injection pipe 45 is not limited to the direction illustrated in FIG. 1 and can be appropriately changed. When the chips are limited to iron, the settlement of the chips can be promoted by disposing a permanent magnet on the bottom surface of the storage room for the cutting oil to be filtered.

[0038]

As described above, according to the first aspect of the present invention, it is possible to provide a filtering device capable of reducing the driving force of the filtration drum and preventing the filtration drum from being overloaded. Further, according to the second aspect, the driving force of the filtration drum can be reduced, the cutting oil can be sufficiently removed from the chips, and the filtration filter can be prevented from being damaged by the floating chips. It is possible to provide a filtration device that can prevent a load state, can prevent floating chips from flowing backward, and can easily reduce costs and easily perform maintenance and inspection by using a common filter drum and a drive source.

According to the third aspect of the present invention, it is possible to provide a filtration device that can reduce the driving force of the filtration drum, prevent the filtration drum from being overloaded, and improve the purification efficiency.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a filtering device according to a first embodiment, in which a cover and others are removed so that an internal main configuration can be seen.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a side view showing the operation of the filtration device.

FIG. 4 shows a filtration device according to a second embodiment.

FIG. 5 is a plan view showing a part of a conventional filtering device, excluding a cover and others, in a cutaway manner.

[Explanation of symbols]

 Reference Signs List 1 clean soda (purified cutting oil soda) 2 left side plate (component of cutting oil soda to be filtered) 3 right side plate (component of cutting oil soda to be filtered) 4 chip discharge port 5 circular opening 6 semicircular opening 8 Input port of cutting oil to be filtered 9 Collection box 10 Left chain (components of scooping means) 11 Right chain (components of scooping means) 12 Scooping plate (components of scooping means) 15 Drive motor 17 Sprocket shaft 18 Upper sprocket 28 Lower sprocket 30 Filter drum 31 Floating swarf scooping plate 32 Guide part 33 Seal member 34 Drum sprocket 40 Design member 41 Mounting plate 44 Filtration filter (filtration means) 45 Injection pipe (components of injection means) 47 Pump (Components of Injection Means) 50 Second Filter Drum

Claims (7)

(57) [Claims] 1. A filtering device for filtering chips from filtered cutting oil in which chips and cutting oil are mixed to obtain purified cutting oil, comprising: a purified cutting oil soda for storing the purified cutting oil; A filtered cutting oil storage soda that temporarily stores the filtered cutting oil supplied through an inlet, and a liquid surface of the filtered cutting oil stored in the excessive cutting oil storage soda. By dividing into two parts upstream and downstream without any gap between the inner wall surface of the cutting oil storage soda, and to prevent floating chips from reaching the downstream side, while floating in the cutting oil storage soda to be filtered A rotatable seal member, a filter means for filtration provided on the outer peripheral surface, and a side opening portion opened on at least one surface to allow the purified cutting oil after filtration to flow into the purified cutting oil soda. Backwashing the filtration means from the inside of the filtration drum and the filtration drum And a scooping means disposed at a predetermined interval to continuously convey the chips from the upstream side to the downstream side of the input port and to drop the chips from the chip discharge port. Characteristic filtration device. 2. A floating chip sedimentation means for sedimenting chips floating on a liquid surface of the cutting oil to be filtered is fixedly provided on the outer peripheral surface of the filter drum. The filtration device according to claim 1. 3. The filtering oil storage soda to be filtered is formed so as to be inclined obliquely upward from an intermediate portion from the upstream to the downstream, and the chip discharge port is provided at an uppermost portion. The filtering device according to claim 1, wherein the filtering device is disposed along the filtered cutting oil storage soda. 4. The filtering device according to claim 1, wherein a V-shaped seal or a plate-shaped seal is used as the seal member. 5. The scooping means is fixed to the filter drum and a sprocket and a guide member disposed in the filtered cutting oil storage soda so as to share a drive source with the filter drum. The drum sprocket, an endless chain meshed with the sprocket and the drum sprocket, and guided by the guide member, and one drive means for driving the sprocket, wherein: The filtration device according to claim 1. 6. A filtering device for filtering chips from filtered cutting oil in which chips and cutting oil are mixed to obtain purified cutting oil, comprising: a purified cutting oil soda for storing the purified cutting oil; In order to temporarily store the filtered oil to be fed through the input port, the cutting oil is formed to be inclined obliquely upward from an intermediate portion from upstream to downstream, and a chip discharge port is provided at an uppermost portion, A cutting oil storage soda to be filtered disposed along the scooping means for cutting chips, and a liquid surface of the cutting oil to be filtered stored in the excess cutting oil storage soda. By dividing into two parts upstream and downstream without a gap between the inner wall surface, floating chips are prevented from reaching the downstream side, and provided rotatably in a floating state in the filtered cutting oil storage soda. A V-seal for filtration and filtration means for filtration are provided on the outer peripheral A filter drum having a side opening opened on at least one side to allow the cutting oil to flow into the purified cutting oil soda; and the filtration drum for sedimenting chips floating on a liquid surface of the cutting oil to be filtered. Floating chip sedimentation means fixed to the outer peripheral surface of the above, Injection means for backwashing the filtration means from the inside of the filtration drum, and Conveying chips continuously from upstream to downstream of the charging port A sprocket and a guide member disposed in the filtered cutting oil storage soda to drop chips from the chip discharge port and to share a drive source with the filter drum; A drum sprocket fixed to a drum, an endless chain meshed with the sprocket and the drum sprocket, and guided by the guide member, and a machine for driving the sprocket And a scooping means having a driving means. 7. A filtering device for filtering chips from filtered cutting oil in which chips and cutting oil are mixed to obtain purified cutting oil, comprising: a purified cutting oil soda for storing the purified cutting oil; A filtered cutting oil storage soda that temporarily stores the filtered cutting oil supplied through an inlet, and a liquid surface of the filtered cutting oil stored in the excessive cutting oil storage soda. By dividing into two parts upstream and downstream without any gap between the inner wall surface of the cutting oil storage soda, and to prevent floating chips from reaching the downstream side, while floating in the cutting oil storage soda to be filtered A rotatable seal member, a filter means for filtration provided on the outer peripheral surface, and a side opening portion opened on at least one surface to allow the purified cutting oil after filtration to flow into the purified cutting oil soda. A plurality of filter drums are distributed and provided from the inside of each of the filter drums. Injecting means for back-washing the filtering means, and continuously transferring chips from the upstream side to the downstream side of the input port, and scooping means arranged at predetermined intervals to drop the chips from the chip discharging port. A filtration device comprising: