JP5351525B2 - Coolant device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coolant device attaining space-saving in a simple constitution. <P>SOLUTION: The coolant device 10 for separating chips from a dirty liquid in which the chips generated during the machining of a work are mixed in the coolant is provided with a box-like casing 23 having an opened flow-in port 11 flowed with the dirty liquid on an upper surface; a conveyor device 21 arranged below the flow-in port 11 in the casing 23 and provided with a filter 20 formed in an endless form; a clean tank 30 arranged on an inner side of the filter 20 and recovering the coolant passed through the filter 20; and a chip tank 40 arranged below the conveyor device 21 in the casing 23 and recovering the chips separated by the filter 20. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a coolant device for separating chips from a dirty liquid in which chips generated during workpiece processing are mixed with coolant.

  A conventional coolant device is configured such that a scraping plate for scooping up the dirty liquid is provided on a conveyor chain that spans from the dirty liquid storage tank to the chip discharge port located obliquely above. Was common. In such a coolant device, by rotating the conveyor chain in a direction in which the scraping plate moves from the bottom of the storage tank to the discharge port, the scraping plate scrapes off the chips at the inclined portion and drops the coolant to remove the chips. And coolant are separated, and only the chips are discharged from the discharge port (see, for example, Patent Document 1).

JP 2002-177713 A

  However, in the conventional coolant device, the shape of the scraping plate and the discharge port is complicated, and fine precision is required for adjusting the scraping angle, and the conveyor chain is inclined obliquely upward with the horizontal portion in the storage tank. There is a problem that a large installation space is required in the horizontal direction. Furthermore, the conveyor chain must be constantly driven with a large load, which has led to an increase in the size of the drive mechanism.

  Accordingly, the present invention has been devised to solve the above-described problem, and an object thereof is to provide a coolant device that can save space with a simple configuration.

The invention according to claim 1 for solving the above problem is a coolant device for separating the chips from a dirty liquid in which chips generated during machining of the workpiece are mixed with the coolant, and the upper surface of the dirty liquid A box-shaped casing having an inflow opening, a conveyor device having an endless filter disposed in the casing below the inflow opening, and an inner end of the filter, and passing through the filter. a clean tank for recovering the coolant, is arranged below the conveyor device within the casing, and chips tank for collecting the separated chips in the filter, provided with, the inlet, the dirty characterized in that the tip with pivots downward is provided abutting turning cover the surface of the filter by the weight of the liquid A coolant system to be.

According to such a configuration, the dirty liquid flowing in from the inflow port falls on the filter, where the chips remain on the filter and only the coolant passes through the filter and is separated into chips and coolant. The The coolant falls into the clean tank inside the filter, and the chips fall and are collected in the chip tank below the conveyor device by driving the conveyor device and rotating the filter. As described above, according to the present invention, it is possible to separate the chips from the dirty liquid with a simple configuration as compared with the related art. Further, the conveyor device only needs to have a size that can cover the opening of the inlet, and is accommodated in the casing together with the clean tank and the chip tank, so that the entire device can be made small and space saving of the device is achieved. be able to. In addition, the rotating cover forms a wall that spans the inlet and the filter, preventing dirty liquid falling on the filter from splashing in all directions and reliably collecting coolant in the clean tank. can do.

  The invention according to claim 2 further includes a scraper that is disposed between the conveyor device and the chip tank and peels off the chip attached to the outer peripheral surface of the filter. It is a coolant apparatus of description.

  According to such a configuration, chips can be reliably dropped and efficiently collected.

  The invention according to claim 3 is the coolant according to claim 1 or 2, wherein an air blow device that blows away the chips adhering to the outer peripheral surface of the filter from the inside is provided inside the filter. Device.

  Even with such a configuration, the chips can be reliably dropped and efficiently collected.

The invention according to claim 4 is a coolant device that separates the chips from a dirty liquid in which chips generated during machining of the coolant are mixed, and has a box shape in which an inlet of the dirty liquid is opened on an upper surface. Casing, a conveyor device having an endless filter disposed below the inlet in the casing, and a clean tank disposed inside the filter and collecting coolant that has passed through the filter And a chip tank that is disposed below the conveyor device in the casing and collects the chips separated by the filter, and the filters are disposed on both sides in the width direction of the filter. A plurality of pins are spanned between a pair of endless chains at a predetermined interval, and the filter portion has a length equivalent to the pin arrangement interval. It is to torque Zealand device and wherein being configured to one end joined rotatably.

  According to such a configuration, when the filter member moves from the upper part to the lower part of the conveyor, the filter member rotates about the pin, so that chips on the filter can be efficiently dropped.

The invention according to claim 5 is a coolant device that separates the chips from a dirty liquid in which chips generated during workpiece processing are mixed with the coolant, and has a box shape in which an inlet of the dirty liquid is opened on an upper surface. Casing, a conveyor device having an endless filter disposed below the inlet in the casing, and a clean tank disposed inside the filter and collecting coolant that has passed through the filter And a chip tank that is disposed below the conveyor device in the casing and collects the chips separated by the filter, and the filters are disposed on both sides in the width direction of the filter. A plurality of pins are bridged between a pair of endless chains at a predetermined interval, and a corrugated filter member is bridged between the adjacent pins. Be configured by providing passing a to torque Zealand device and said.

  According to such a configuration, when the dirty liquid falls on the upper portion and the inclined portion of the wave shape, it smoothly flows to the lower side along the inclination, while when the dirty liquid falls on the lower portion of the wave shape, Even if it bounces around, it collides with the inclined portion, so that it is possible to prevent the dirty liquid from scattering around the conveyor device.

  According to the present invention, in the coolant device, an excellent effect is achieved such that space can be saved with a simple configuration.

It is the perspective view which showed the coolant apparatus which concerns on 1st embodiment. It is the perspective view which showed the conveyor apparatus and the clean tank. It is sectional drawing which showed the coolant apparatus which concerns on 1st embodiment. It is sectional drawing which showed the coolant apparatus which concerns on 2nd embodiment. It is the perspective view which showed the filter which concerns on 2nd embodiment. It is sectional drawing which showed the coolant apparatus which concerns on 3rd embodiment. It is the perspective view which showed the filter which concerns on 3rd embodiment.

(First embodiment)
A first embodiment for implementing a coolant device according to the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, a case where such a coolant apparatus is installed in a bedless type machine tool having no bed below the work processing chamber area will be described as an example.

  The machine tool collects the machining unit that processes the workpiece and the dirty liquid mixed with the chips and coolant generated during the workpiece processing, separates the chips and coolant, and circulates the coolant to the workpiece processing chamber area. And a control unit for controlling the operation of the machine tool.

  According to the bedless type machine tool, there is no bed provided at the bottom of the column in a normal machine tool, so the bed does not protrude below the work processing chamber area, and the space for installing the coolant device in the vertical direction It can be secured larger than a normal machine tool.

  As shown in FIGS. 1 and 3, the coolant device 10 includes a casing 23 having a size arranged in a lower space of the work processing chamber area. On the upper surface of the casing 23, an inflow port 11 for the dirty liquid is formed so as to face the work processing chamber area. The periphery of the inflow port 11 is formed in a funnel shape so that the dirty liquid flows toward the inflow port 11. In the casing 23, a conveyor device 21 including an endless filter 20 is provided below the inlet 11. A clean tank 30 that collects the coolant that has passed through the filter 20 is provided inside the filter 20. Further, in the casing 23, a chip tank 40 that collects chips separated by the filter 20 is provided below the conveyor device 21.

  As shown in FIGS. 2 and 3, the filter 20 is made of, for example, a metal mesh such as stainless steel, or a thin plate frame bonded with a cloth filter, and the roughness of the eyes is, for example, # 40 mesh. The filter 20 is formed in an endless shape by connecting both longitudinal ends of a metal mesh formed in a band shape. The filter 20 is wound around the pair of rollers 22 and 22 and has flexibility so that the roller 20 can be folded back. The filter 20 has a width equivalent to the inner dimension of the casing 23 that surrounds the filter 20 (the length in the direction orthogonal to the moving direction), and the wall surface 23 a of the casing 23 is close to both ends in the width direction of the filter 20. It is configured. The filter 20 includes an upper side portion 20a and a lower side portion 20b with the rollers 22 and 22 interposed therebetween.

  A rotation drive mechanism (not shown) is connected to at least one of the rollers 22, and the filter 20 is rotated by rotating the roller 22. The filter 20, the rollers 22, 22 and the rotation driving mechanism constitute a conveyor device 21. The conveyor device 21 is stopped without rotating the filter 20 when the workpiece is processed. Then, the dirty liquid falls on the upper side portion 20 a and the chips are placed for a predetermined time, so that the coolant passes through the filter 20 and falls downward, and the chips remain on the filter 20. When the chip reaches a predetermined amount, the roller 22 is rotated and the filter 20 is rotated. As a result, the chips on the filter 20 move together with the filter 20, and are dropped downward and collected in the chip tank 40 at a portion where the filter 20 is folded downward by the roller 22.

  As shown in FIG. 3, the chip tank 40 is formed in a box shape having an open top and covers the entire lower part of the filter 20. The chip tank 40 is provided below the filter 20 so as to be drawn out of the coolant device 10. Note that the shape of the chip tank 40 is not limited to the above-described shape, and the chip tank 40 may be separately formed below the pair of rollers 22 and 22 so as to be drawn out to the outside.

  In the casing 23, a scraper 24 that peels off chips adhering to the outer peripheral surface of the filter 20 is provided between the conveyor device 21 and the chip tank 40. The scraper 24 is constituted by a thin plate or a brush, and is fixed to the casing 23 or the chip tank 40. The scraper 24 is provided close to the outer peripheral surface of the filter 20 and has a width equivalent to the width of the filter 20. The scraper 24 is disposed below the roller 22 on the side where the filter 20 is folded back downward. The tip of the scraper 24 is close to the surface of the filter 20, and the chip protruding from the filter 20 is locked and dropped. The scraper 24 is disposed above the opening of the chip tank 40, and the dropped chip is collected in the chip tank 40. The installation position of the scraper 24 is not limited to the above position, and may be an arbitrary position on the lower side 20b of the filter 20. The shape and material of the scraper 24 are not limited to those described above.

  On the other hand, the roller 22 on the side where the filter 20 is turned up is provided with an air blow device 25 that blows off chips adhering to the outer peripheral surface of the filter 20 (relatively small chips that clog the filter 20) from the inside. It has been. The air blow device 25 includes a support shaft 26 that rotatably supports the roller 22, and compressed air supply means (not shown) that supplies compressed air to the support shaft 26. Through holes (not shown) are formed in the support shaft 26 at a predetermined pitch over the entire length of the filter 20 in the width direction, and compressed air is blown out from the through holes. The through hole is formed in the lower portion of the support shaft 26 and is configured to blow off chips from the inside of the filter 20 downward. The blown off chips fall into the lower chip tank 40 and are collected.

  The inflow port 11 located above the filter 20 is provided with a rotation cover 12 that rotates downward due to the weight of the dirty liquid and whose tip abuts against the surface of the filter 20. The inflow port 11 has a rectangular shape, and a rotation cover 12 is provided on sides facing each other at both ends in the moving direction of the filter 20. The rotation cover 12 is configured by a rectangular plate, and one side of the rotation cover 12 is rotatably supported on each side of the inflow port 11 facing each other via a spring hinge 13. The spring hinge 13 is configured to keep the rotating cover 12 in a horizontal state (a state indicated by a two-dot chain line in FIG. 3) by the spring force when the dirty liquid does not flow and no load is applied. The spring force of the spring hinge 13 is set to an urging force such that when the dirty liquid flows on the rotation cover 12, the rotation cover 12 is rotated downward by its weight. When the rotation cover 12 is rotated downward, the lower end thereof has a length that contacts the surface of the filter 20 (a state indicated by a solid line in FIG. 3).

  As shown in FIG. 2, the clean tank 30 is accommodated in the casing 23, and is disposed below the side of the primary clean tank 30 a adjacent to the casing 23 and the primary clean tank 30 a that receives the coolant inside the filter 20. And a secondary clean tank 30b. A primary clean tank 30a is disposed in the space between the rollers 22 and 22 between the upper side 20a and the lower side 20b of the filter 20. The primary clean tank 30a temporarily receives the coolant that has passed through the upper side 20a of the filter 20 and flows it to the secondary clean tank 30b. The secondary clean tank 30b has a larger capacity than the primary clean tank 30a and stores coolant. The secondary clean tank 30b is provided with a pump for circulating the coolant to the work processing chamber area. In addition, the case part 23b (refer FIG. 1) which accommodates the secondary clean tank 30b is integrally formed or combined with the casing 23, and is integrated.

  An oil skimmer 31 that collects floating oil such as driving oil mixed in the coolant is provided on the upper portion of the secondary clean tank 30b. The oil skimmer 31 rotates the metal or resin belt 31a from above the coolant to the inside, so that the floating oil on the surface is entangled with the belt 31a and collected. In the present embodiment, the drive shaft 31 b of the belt 31 a is connected to the rotation shaft of the roller 22 and rotates simultaneously with the rotation of the filter 20. The rotation of the belt 31a is not limited to the above-described configuration, and may be rotated by providing a separate drive rotation mechanism.

  As shown in FIG. 1, a liquid level gauge 32 is provided above the secondary clean tank 30b so that the amount of coolant in the tank can be detected. Furthermore, a low-pressure tank 33a and an intermediate-pressure tank 33b are provided above the secondary clean tank 30b, and are used for the operation of the conveyor device 21 and the oil skimmer 31 and the circulation of the coolant.

  A cover unit (not shown) for covering and partitioning the work processing chamber area is provided at the upper portion of the coolant device 10 to prevent chips and coolant from scattering outside the work processing chamber area. .

  Next, the operation of the coolant device when machining a workpiece using a machine tool will be described.

  When machining a workpiece with a machine tool, the pump is operated by the low-pressure tank 33a and the intermediate-pressure tank 33b, and the coolant is circulated and supplied to the workpiece machining chamber area.

  At this time, the coolant and chips do not scatter to the outside by the cover unit and fall onto the coolant device 10 below. Then, the dirty liquid in which the chips are mixed with the coolant flows from the inclined portion at the top of the coolant device to the inlet 11. Then, when the dirty liquid flows on the rotating cover 12 of the inflow port 11, the rotating cover 12 is rotated downward by the weight of the dirty liquid, as shown in FIG. Fall on the top. At this time, the lower end of the rotating cover 12 comes into contact with the surface of the filter 20 to form wall surfaces on both sides of the moving direction of the filter 20. Together with this, the wall surface 23 a of the casing 23 is close to both ends of the filter 20 in the width direction. As a result, the periphery of the dirty liquid falling region of the filter 20 is covered with the wall surface, and even if the falling dirty liquid jumps up, it can be prevented from falling below the filter.

  And from the dirty liquid which fell on the filter 20, a coolant permeate | transmits the filter 20 and falls to the primary clean tank 30a. The dropped coolant flows to and is stored in the secondary clean tank 30b. The coolant stored in the secondary clean tank 30b is freed of floating oil by the oil skimmer 31 to become clean coolant, and is sent to the work processing chamber area by the pump.

  When the amount of chips on the filter 20 reaches a predetermined amount, the processing of the workpiece is temporarily stopped, the rotating cover 12 is returned to the original horizontal state, and then the conveyor device 21 is driven to rotate the filter 20. As a result, the chips from which the coolant has been removed are conveyed to the end of the conveyor and then dropped downward and collected into the chip tank 40 where the filter 20 is folded back. Here, the chips adhering to the filter 20 without being dropped downward are scraped off by the scraper 24 provided on the downstream side and collected into the chip tank 40. In the scraper 24, relatively large chips protruding from the surface of the filter 20 are scraped off. Furthermore, the chips that have not fallen by the scraper 24 are further blown down by the air blow device 25 provided on the downstream side and collected into the chip tank 40. In the air blowing device 25, relatively small chips that are clogged in the filter 20 are blown off. When a predetermined amount of chips accumulates in the chip tank 40, the chip tank 40 is taken out to discharge the chips.

  As described above, according to the coolant device 10 according to the present embodiment, the dirty liquid that has flowed in from the inlet 11 falls on the filter 20, where chips remain on the filter and only the coolant remains in the filter 20. And is separated into chips and coolant. In particular, in the present invention, since the filter 20 is stopped when the coolant is separated, no driving energy is required. Moreover, although the chip | tip is made to fall to the chip tank 40 below the conveyor apparatus 21 by driving the conveyor apparatus 21 and rotating the filter 20, the rotational load moves a chip | tip horizontally. Therefore, it is very small as compared with the conventional scraping type conveyor that moves the coolant and chips upward, and simplification and energy saving of the rotary drive mechanism can be achieved. Furthermore, since the coolant device 10 generally has a space for installing the casing 23 in accordance with the size of the filter 20, it is possible to separate the chips from the dirty liquid with a simple configuration as compared with the related art. Further, the conveyor device 21 only needs to have a size that can cover the opening of the inlet, and is accommodated in the casing together with the clean tank 30 and the chip tank 40, so that the entire device can be made small, and the space of the device can be saved. Can be achieved.

  Further, by providing the scraper 24 and the air blow device 25, the chips can be reliably dropped and efficiently recovered. Furthermore, since the chips adhering to the filter 20 can be removed, it is possible to prevent a decrease in the coolant transmittance at the position where the dirty liquid falls on the upper side portion 20a.

  Further, since the rotation cover 12 is provided at the inlet 11, a wall surface is formed around the area where the dirty liquid falls, so even if the dirty liquid falling on the filter 20 is scattered, the wall is formed below the filter 20. The coolant can be reliably recovered in the clean tank 30.

(Second embodiment)
The coolant device 110 according to the second embodiment is different from the first embodiment in the shape of the conveyor device 121. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  As shown in FIGS. 4 and 5, the filter 120 of the conveyor device 121 according to this embodiment includes a plurality of filters in a pair of endless chains 122 (only one is shown in FIG. 4) disposed on both sides in the width direction of the filter 120. .. Of the filter member 124 having a length equivalent to the arrangement interval of the pins 123 is rotatably joined.

  The endless chains 122 and 122 are wound around two pairs of sprockets 125 and 125 (only one pair is shown in FIG. 4) provided on both ends of the filter 120 in the width direction at both ends of the conveyor device 121.

  The pin 123 is a member for rotatably supporting the filter member 124, and extends in the width direction of the filter 120. Both ends of the pin 123 are fixed to a pair of endless chains 122 and move simultaneously with the rotation of the endless chain 122.

  The filter member 124 is configured by fixing a metal mesh 124b inside a rectangular frame-shaped frame body 124a. A pin 123 is rotatably attached to one end of the frame body 124a. The frame body 124a is attached to the pin 123 so that the pin 123 is located in front of the moving direction of the conveyor. A rising portion 126 is formed at the other end of the frame 124a (the tip opposite to the side where the pin 123 is attached). The rising portion 126 locks chips on the filter 120. It is designed to move reliably. The pin 123 is provided with a stopper (not shown) so as to stop at a predetermined rotation angle when the filter member 124 moves to the lower side portion 120b.

  A rotation drive mechanism (not shown) is connected to at least one sprocket 125, and by rotating the sprocket 125, the endless chain 122 is rotated to rotate the filter 120.

  According to the coolant device 110 provided with the conveyor device 121 having such a configuration, the following operational effects can be obtained in addition to the first embodiment. According to such a coolant device 110, when the filter member 124 is folded back from the upper side portion 120a to the lower side portion 120b beyond the one sprocket 125, the filter member 124 turns around the pin 123 and hangs obliquely. At this time, the filter member 124 rotates, and the rotation of the filter member 124 is suddenly stopped at a predetermined angle by the stopper of the pin 123, so that the chips adhering to the filter member 124 are efficiently dropped by the impact at this time. be able to. Further, the chips that have not fallen here are blown downward by the air blow device 25 provided on the further downstream side, and are collected into the chip tank 40.

(Third embodiment)
The coolant device 210 according to the third embodiment is different from the second embodiment in the shape of the filter 220 of the conveyor device 221. In addition, since the other structure is the same as that of 2nd embodiment, it attaches | subjects the same code | symbol and abbreviate | omits description.

  As shown in FIGS. 6 and 7, the filter 220 according to the present embodiment includes a plurality of pins 223 on a pair of endless chains 222 (only one is shown in FIG. 6) disposed on both sides in the width direction of the filter 220. 223... Are bridged at a predetermined interval, and a corrugated filter member 224 is bridged between adjacent pins 223 and 223.

  The endless chain 222 has the same configuration as the endless chain 122 of the second embodiment, and two pairs of sprockets 125 and 125 (a pair in FIG. 6) provided on both ends of the filter 120 in the width direction at both ends of the conveyor device 121. (Only shown). A rotation drive mechanism (not shown) is connected to at least one sprocket 125, and by rotating the sprocket 125, the endless chain 222 is rotated and the filter 220 is rotated.

  The pins 223 are members for fixing the filter member 224, and both ends thereof are fixed to the pair of endless chains 222, and move simultaneously with the rotation of the endless chain 222.

  The filter member 224 is configured by forming a metal mesh in a circular arc shape in cross section, and is fixed by being spanned between adjacent pins 223 and 223. The filter member 224 is arranged so as to repeat upward and downward, and the entire filter 220 forms a wave shape. In the present embodiment, the two filter members 224 and 224 form one wave-shaped period, but the present invention is not limited to this, and one filter member forms unevenness (one period). It may be a wave shape.

  According to the coolant device 210 provided with the conveyor device 221 having such a configuration, the following operational effects can be obtained in addition to the first embodiment. According to the coolant device 210, since the filter 220 is formed in a wave shape, when the dirty liquid falls on the upper portion and the inclined portion of the wave shape, the filter 220 smoothly flows to the lower side along the inclination. When the dirty liquid falls on the lower part of the mold, even if it bounces around, it collides with the adjacent inclined portion, so that it is possible to prevent the dirty liquid from scattering around the conveyor device 221.

  The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and it is needless to say that the design can be changed as appropriate without departing from the spirit of the present invention. For example, in the present embodiment, the case where the present invention is applied to the bedless type machine tool 1 has been described as an example, but it is needless to say that the present invention can also be applied to a normal machine tool provided with a bed. Also in this case, the effect that the space saving of the coolant device can be achieved can be obtained.

DESCRIPTION OF SYMBOLS 10 Coolant apparatus 11 Inflow port 12 Rotating cover 20 Filter 21 Conveyor apparatus 23 Casing 24 Scraper 25 Air blow apparatus 30 Clean tank 40 Chip tank 110 Coolant apparatus 120 Filter 121 Conveyor apparatus 210 Coolant apparatus 220 Filter 221 Conveyor apparatus

Claims (5)

A coolant device for separating the chips from a dirty liquid in which chips generated during workpiece processing are mixed with the coolant,
A box-shaped casing having an inlet for the dirty liquid opened on the upper surface;
A conveyor device provided with an endless filter disposed in the casing below the inlet,
A clean tank that is disposed inside the filter and collects coolant that has passed through the filter;
A chip tank disposed below the conveyor device in the casing and collecting chips separated by the filter, and
A coolant device, characterized in that a rotating cover is provided at the inflow port so as to rotate downward by the weight of the dirty liquid and a tip of which contacts the surface of the filter . The coolant device according to claim 1, further comprising a scraper that is disposed between the conveyor device and the chip tank and peels off the chip attached to the outer peripheral surface of the filter. The coolant device according to claim 1 or 2, wherein an air blow device that blows off the chips adhering to the outer peripheral surface of the filter from the inside is provided inside the filter. A coolant device for separating the chips from a dirty liquid in which chips generated during workpiece processing are mixed with the coolant,
A box-shaped casing having an inlet for the dirty liquid opened on the upper surface;
A conveyor device provided with an endless filter disposed in the casing below the inlet,
A clean tank that is disposed inside the filter and collects coolant that has passed through the filter;
A chip tank disposed below the conveyor device in the casing and collecting chips separated by the filter, and
The filter spans a pair of endless chains arranged on both sides of the filter in the width direction, and a plurality of pins are spanned at a predetermined interval, and one end of a filter member having a length equivalent to the arrangement interval of the pins can be rotated. A coolant device, characterized in that it is configured to be joined to the coolant. A coolant device for separating the chips from a dirty liquid in which chips generated during workpiece processing are mixed with the coolant,
A box-shaped casing having an inlet for the dirty liquid opened on the upper surface;
A conveyor device provided with an endless filter disposed in the casing below the inlet,
A clean tank that is disposed inside the filter and collects coolant that has passed through the filter;
A chip tank disposed below the conveyor device in the casing and collecting chips separated by the filter, and
The filter is configured by providing a plurality of pins across a pair of endless chains arranged on both sides of the filter in the width direction at predetermined intervals, and a wave-type filter member between the adjacent pins. A coolant device characterized by that.

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