JP2010110835A - Cutting chip separation and discharge device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting chips separation and discharge device which lengthens a service life of an apparatus, improves operability in use, reduces load for maintenance, and improves availability of the apparatus. <P>SOLUTION: The problem is solved by that a filtering drum 150 has an exhaust pipe at both ends, the respective ends of the exhaust pipe are positioned in a pair of circular openings provided on a side face of a conveyor frame 120, an annular roller bearing plate having an outer diameter larger than a diameter of the circular opening and an inner diameter in contact with an outer peripheral surface of the end of the exhaust pipe is threaded on the side face of the conveyor frame 120 from outward concentrically with the circular opening, and a plurality of roller bearings 182 in contact with the outer peripheral surface of the exhaust pipe are pivoted to an external side face of the roller bearing plate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  In the present invention, when metal processing such as cutting and grinding by a machine tool is performed, a turbid coolant containing metal cutting waste such as iron or aluminum or cutting waste such as grinding waste discharged from the machine tool is applied to the conveyor frame. It is thrown into the turbid coolant storage tank provided in the lower horizontal part, and only the chips are caught by the hinge belt installed in the endless circulation state on the conveyor frame, and it is scooped up and carried out of the tank. Chips that are filtered by a filtration drum that is rotatably in contact with a part of the endless circulation orbit made by, and collected from the turbid coolant reservoir and discharged to the outside by machine tools The present invention relates to a sorting and unloading device.

  When machining, grinding, etc. on metal materials with machine tools, the lubricant is dissolved to suppress friction of the cutting jig, grinding jig, work material, etc., and to cool those members. Or a coolant such as lubricating oil is used. Then, the used turbid coolant containing the chips discharged from the machine tool is usually collected and collected only by the chip sorting and discharging device, and purified to a reusable level.

  FIG. 6 is a schematic side view showing a conventionally used chip sorting / discharging device 300 with the front side frame 326 in a transparent state. The chip sorting / discharging device 300 includes a turbid coolant storage tank 330 into which a turbid coolant D containing swarf discharged from the machine tool M is charged, and an endless endlessly installed in the conveyor frame 320 in an endless circulation state. Hinge belt 340. The conveyor frame 320 includes a conveyance-side inclined frame 321, a discharge unit frame 322, a return-side inclined frame 323, a horizontal floor frame 324, a metal frame continuous with the tail frame 325, and two side frames 326 that block both side surfaces thereof. It is configured.

  The chips K contained in the turbid coolant D charged into the turbid coolant storage tank 330 are scooped up by the hinge belt 340 along the partition plate 360 to the outside of the turbid coolant storage tank 330 in the conveyor frame 320 and hinged. From the chip discharge port 328 located below the upper circumferential end 342 of the belt 340, the belt 340 is carried out to the chip collection box B or the like. A drive sprocket 370 that transmits power to the hinge belt 340 is connected to a drive motor (not shown) at the upper circumferential end 342 of the hinge belt 340, while the hinge belt 340 is connected to the return side horizontal portion 343. A driven sprocket 372 is provided at the lower rotating end 344 that rotates in the direction from the conveying side horizontal portion 341 to the lower rotating end 344.

  Further, at the base of the rising portion of the conveyor frame 320, there is a filtration drum 350 wound with a filtration filter made of a nonwoven fabric for filtering the turbid coolant D stored in the turbid coolant storage tank 330 and discharging it to the outside. Is provided. Then, the filtered coolant, that is, the purification coolant, is discharged through a drain outlet 329 to a purification coolant storage tank 390 provided outside the conveyor frame 320, temporarily stored in the purification coolant storage tank 390, and then sucked up by a pump or the like. Reused in machine tools M and the like. An inspection window 327 for inspecting the properties of the filtration drum 350 is provided on the side frame 326 of the conveyor frame 320.

  On the other hand, residual chips that do not pass through the filtration drum 350 are again scooped up by the hinge belt 340 and discharged from the chip discharge port 328. The filtration drum 350 is provided with liquid purifying means (not shown) for purifying the filter so that the filtration filter gradually becomes clogged. The purifying coolant is sprayed from the liquid ejecting means to adhere to the surface of the filtration filter. The powder K is blown away.

Here, the pivot structure of the filtration drum 350 will be described with reference to FIG. 7 which is a sectional view taken along line VII-VII in FIG. The filtration drum 350 has a cylindrical shape in which a plurality of drum rods 351 are fixed to a pair of annular drum side plates 353 by welding or the like. And the filtration filter 352 which consists of a nonwoven fabric etc. is wound by the outer peripheral surface, and the both ends are fastened and fixed by the hose band 354. Sprocket teeth 355 are fixed to the outside of the drum side plate 353 on one side, which meshes with the hinge belt 340 running endlessly and rotates the filtration drum 350 described above. An annular metal bearing 356 is fixed inside the drum side plate 353 with bolts. The metal bearing 356 is in sliding contact with the outer peripheral surface of the drain pipe 380 fixed to the conveyor frame 320, so that the filtration drum 350 is rotatably supported. Further, in order to prevent the turbid coolant from entering the gap between the metal bearing 356 and the drain pipe 380 to wear the sliding contact surface, or to prevent the turbid coolant from leaking outside without passing through the filter 352, the cross section V A mold oil seal 382 is pressed against the side surface of the metal bearing 356 (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2005-230943 (FIG. 2)

  However, the conventional chip sorting and discharging apparatus 300 as described above cannot keep checking the wear state of the oil seal 382 unless the filter drum 350 is taken out. It was. Therefore, the turbid coolant containing chips due to the wear of the oil seal 382 enters between the metal bearing 356 and the drain pipe 380 and corrodes or wears the sliding contact surface. It was.

Further, as described above, the filtration drum 350 has the annular drum side plates 353 at both ends, and the metal bearing 356 is attached to the inside thereof, and the outer periphery of the drain pipe 380 fixed to the conveyor frame 320. Since the liquid level of the turbid coolant is lowered most, that is, even when the apparatus is stopped, the liquid level of the turbid coolant is lowered only to the position indicated by the horizontal line L in FIG. Since the conveyance-side horizontal portion 341 of the belt 340 remains immersed in the turbid coolant D, it is not known whether the apparatus is operating or stopped, and there is a problem that operability in use is poor.
Further, for the same reason, a part of the metal bearing 356 as a bearing member is always immersed in the turbid coolant, so that the deterioration of the metal bearing 356 is promoted and the life of the apparatus is reduced.

  Further, when the metal bearing 356 and the oil seal 382 are replaced, it is necessary to remove the filtration drum 350 from the conveyor frame 320, which places a heavy burden on maintenance work, leading to a reduction in the operating rate of the apparatus.

  Therefore, the technical problem to be solved by the present invention, that is, the object of the present invention is to extend the life of the apparatus, improve the operability in use, reduce the burden of maintenance work, and reduce the operating rate of the apparatus. It is to provide a chip sorting and discharging device that achieves improvement.

  First, the invention according to claim 1 is a turbid coolant storage tank provided in a lower horizontal portion of a conveyor frame into which turbid coolant containing chips discharged from a machine tool is charged, and the turbid coolant is filtered. A cylindrical filtration drum that serves as a purification coolant, and a conveyor that circulates in the conveyor frame and scoops up the chips and discharges them to the outside through a chip discharge port provided at the head of the conveyor frame. In the powder sorting and discharging apparatus, the filtration drum has drain pipes at both ends, and each end of the drain pipe is located in a pair of circular openings provided on the side surface of the conveyor frame, and the circular openings An annular roller bearing plate having an outer diameter larger than the diameter of the drain pipe and an inner diameter in contact with the outer peripheral surface of the end of the drain pipe is concentric with the circular opening on the side of the conveyor frame. Is screwed from by a plurality of roller bearings in contact with the outer peripheral surface of the drain pipe on the outer surface of the roller bearing plate is pivotally mounted, it is obtained by solving the above problems.

The invention according to claim 2 is the chip sorting and discharging apparatus according to claim 1, wherein the roller bearing is disposed above the normal liquid level of the purification coolant, so that the problem is solved. Is a further solution.
Here, “the normal liquid level height of the purifying coolant” in the present invention means the position where the fluctuation of the liquid level of the purifying coolant when the apparatus is operating normally is the highest.

  The invention according to claim 3 is the chip sorting and discharging apparatus according to claim 1 or 2, wherein the convex portion projecting in the circumferential direction on the outer peripheral surface of the end portion of the drain pipe and the roller bearing are provided. The gland packing for preventing leakage of the turbid coolant is disposed in close contact with the outer peripheral surface of the drain pipe between the plates, thereby further solving the above problem.

  The “chip” in the present invention is discharged from a machine tool such as grinding scrap discharged from a grinding machine device as well as metal cutting scraps such as iron and aluminum discharged from a cutting device or the like. It is a general term for metal scrap.

  According to the first aspect of the present invention, the turbid coolant storage tank provided in the lower horizontal portion of the conveyor frame into which the turbid coolant containing the chips discharged from the machine tool is charged, and the turbid coolant are filtered. Chip separation discharge having a cylindrical filtration drum as purification coolant and a conveyor that circulates in the conveyor frame and scoops up the chips and discharges them to the outside from the chip discharge port provided at the head of the conveyor frame In the apparatus, the filtration drum has drain pipes at both ends, and each end of the drain pipe is located in a pair of circular openings provided on the side surface of the conveyor frame, and has an outer diameter larger than the diameter of the circular opening. And an annular roller bearing plate having an inner diameter in contact with the outer peripheral surface of the end of the drain pipe is concentrically formed with the circular opening and is screwed from the outside to the side surface of the conveyor frame. A plurality of roller bearings that contact the outer peripheral surface of the drain pipe are pivotally provided on the side surface, so that the roller bearings are located outside the conveyor frame and do not contact the turbid coolant. Since the roller bearing can be removed without taking it out, deterioration and wear of the roller bearing can be suppressed, the life of the apparatus can be extended, the maintenance work load can be reduced, and the operating rate of the apparatus can be improved.

  In addition, since the diameter of the drainage port and the diameter of the filtration drum can be made almost equal, the liquid level of the turbid coolant when the equipment is stopped can be lowered below the horizontal part on the conveyor side of the conveyor, and the operating state of the equipment can be reduced. Since it can be visually observed, operability in use is improved.

  Furthermore, since the filtration drum is rotatably supported by a plurality of roller bearings, a metal bearing over the entire circumference of the filtration drum, which has been conventionally used, is unnecessary, so that the cost of the apparatus can be reduced.

  According to the second aspect of the present invention, in the chip sorting and discharging apparatus according to the first aspect, the roller bearing is disposed above the normal liquid level height of the purification coolant. Is prevented from being exposed to the state of being immersed in the purification coolant for a long time, so that the life of the roller bearing can be extended.

And according to the invention which concerns on this Claim 3, in the chip separation discharge apparatus which concerns on Claim 1 or Claim 2, the convex part and roller bearing which protruded in the circumferential direction on the outer peripheral surface of the edge part of a drain pipe Since the gland packing that prevents leakage of turbid coolant between the plate and the outer peripheral surface of the drain pipe is disposed in close contact with the plate, the gap between the drain pipe and the roller bearing plate is sealed. Contributes greatly to improving the workplace environment without leaking.
Moreover, since this gland packing can be exchanged from the outside of the conveyor case, it is possible to reduce the maintenance work load and improve the operating rate of the apparatus.

  The chip separation and discharge device of the present invention is a turbid coolant storage tank provided in a lower horizontal portion of a conveyor frame into which turbid coolant containing chips discharged from a machine tool is charged, and filters the turbid coolant. Chip separation and discharge device having a cylindrical filtration drum as a purification coolant, and a conveyor that circulates in the conveyor frame and scoops up the chips and discharges them to the outside from a chip discharge port provided at the head of the conveyor frame. In each of the above, the filtration drum has drain pipes at both ends, and each end of the drain pipe is located in a pair of circular openings provided on the side surface of the conveyor frame, and has an outer diameter larger than the diameter of the circular openings. An annular roller bearing plate having an inner diameter in contact with the outer peripheral surface of the end of the drain pipe is screwed from the outside to the side of the conveyor frame concentrically with the circular opening, and the outer side of the roller bearing plate. Multiple roller bearings that are in contact with the outer peripheral surface of the drain pipe are pivotally mounted on the surface, so that deterioration and wear of the roller bearings are suppressed and the life of the equipment is extended, reducing the burden of maintenance work and operating the equipment As long as the improvement of the rate is realized and the cost reduction of the apparatus is realized, any specific embodiment may be used.

  For example, in the chip sorting and discharging apparatus of the present invention, a hinge belt is preferably used as a conveyor that circulates in the conveyor frame and scoops up the chips, but it can efficiently scoop up the chips from the turbid coolant. If possible, other types of conveyors, such as a scraper conveyor, are not a problem.

  Further, the conveyor frame of the chip sorting and discharging apparatus according to the present invention is a head provided with a chip discharge port for discharging chips from a lower horizontal portion provided with a turbid coolant storage tank into which turbid coolant is charged. Although it has a shape that rises toward the head, even if the side shape that rises with a gentle slope from the lower horizontal part toward the head is substantially S-shaped, it faces the head from the lower horizontal part. There is no problem even if the shape of the side surface in which the inclination is steep and the conveyor on the return side is almost vertical is substantially L-shaped. The latter case is particularly preferable because the installation area of the apparatus is reduced and the degree of freedom of arrangement layout of the apparatus is improved.

  Hereinafter, a chip sorting and discharging apparatus 100 according to an embodiment of the present invention will be described with reference to the drawings.

  Here, FIG. 1 is a schematic side view showing the side frame 126 on the near side of the conveyor frame 120 of the chip sorting and discharging apparatus 100 according to the embodiment of the present invention in a transparent state, and FIG. FIG. 3 is a cross-sectional view showing the cross-section taken along line II-II of FIG. 2 with the hinge belt 140 omitted, FIG. 3 is an enlarged view of part III of FIG. 2, and FIG. FIG. 5 is a perspective view of a filtration drum 150 attached to the chip sorting / discharging device 100. FIG.

  First, the overall structure of the chip sorting / discharging device 100 of this embodiment will be described with reference to FIG.

  As shown in FIG. 1, the chip sorting and discharging apparatus 100 according to the present embodiment includes a turbid coolant storage tank 130 into which a turbid coolant D containing chips discharged from the machine tool M is charged, and a conveyor frame 120. And a hinge belt 140 provided in an endless circulation state. The conveyor frame 120 includes a conveyance-side inclined frame 121, a discharge unit frame 122, a return-side vertical frame 123, a horizontal floor frame 124, a metal frame continuous with the tail frame 125, and two side frames 126 that block both side surfaces thereof. It is configured.

  Chips contained in the turbid coolant D put into the turbid coolant reservoir 130 are scooped up by the hinge belt 140 along the partition plate 160 to the outside of the turbid coolant reservoir 130, and the upper peripheral end of the hinge belt 140 It is discharged from a chip discharge port 128 located below the portion 142 to a chip collection box (not shown). A drive sprocket 170 that transmits power to the hinge belt 140 is disposed at an upper circumferential end 142 of the hinge belt 140, and this drive sprocket 170 is connected to a drive motor (not shown). A driving force for circulatingly rotating 140 is applied. On the other hand, a driven sprocket 172 is provided at the lower circumferential end 144 where the hinge belt 140 rotates in the circumferential direction from the return side horizontal part 143 to the transport side horizontal part 141.

  Further, a cylindrical filter drum around which a filter made of a nonwoven fabric or the like is wound around the root of the rising portion of the conveyor frame 120 to filter out the turbid coolant stored in the turbid coolant storage tank 130 and discharge it to the outside. 150 (see FIG. 5) is provided. Then, the filtered coolant, that is, the purification coolant is discharged to the purification coolant storage tank 190 provided outside the conveyor frame 120 through the drain port 129, and once stored in the purification coolant storage tank 190, the pump (not shown) Is re-used on the machine tool M and the like. The side frame 126 of the conveyor frame 120 is provided with an inspection window 127 for inspecting the properties of the filtration drum 150.

  On the other hand, residual chips that do not pass through the filtration drum 150 are scooped up again by the hinge belt 140 and discharged from the chip discharge port 128. Such a filtration drum 150 is provided with a liquid jetting means (not shown) for purifying the filter because the filter gradually becomes clogged, and a cleaning coolant is jetted from the liquid jetting means to adhere to the surface of the filter. The blown chips are blown away.

  Next, the structure of the filtration drum 150 which is the main part of the present embodiment and the mounting structure to the conveyor frame 120 will be described with reference to FIGS. As shown in FIG. 5, the cylindrical filter drum 150 has drain pipes 156 at both ends of the opening, and a plurality of drum rods 151 are fixed between the drain pipes 156. And the filtration filter 152 which consists of a nonwoven fabric etc. is wound by the outer peripheral surface, and it is fastened and fixed to the drain pipe 156 by the large diameter hose band 154 (refer FIG. 2). Furthermore, sprocket teeth 155 for rotating the filtration drum 150 in contact with a part of the endless circulation track of the hinge belt 140 are provided on one drain pipe 156 so as to project.

  Each end of the drain pipe 156 is located in a pair of circular openings 120a provided in the side frame 126 of the conveyor frame 120 (see FIG. 3). An annular roller bearing plate 180 having an outer diameter larger than the diameter of the circular opening 120a and an inner diameter in contact with the outer peripheral surface of the end of the drain pipe 156 is concentric with the circular opening 120a. The side frame 126 is screwed from the outside.

  In order to firmly screw the roller bearing plate 180 to the side frame 126 of the conveyor frame 120, an annular frame reinforcing plate 189 having an inner diameter substantially equal to the diameter of the circular opening 120a is disposed outside the side frame 126. ing. A plurality of roller bearings 182 that are in contact with the outer peripheral surface of the drain pipe 154 are screwed to the outer surface of the roller bearing plate 180 by bolts 186 and bearing seats 185 via washers 184. The bearing seat 185 is welded to the roller bearing plate 180.

In this embodiment, four roller bearings 182 are provided as shown in FIG. These roller bearings 182 are disposed above the normal liquid level height H of the purifying coolant, and the roller bearings 182 are structured not to be immersed in the purifying coolant for a long period of time. As a result, corrosion of the roller bearing 182 is prevented. Further, since the roller bearing 182 is located outside the conveyor frame 120, the roller bearing 182 can be replaced from the outside of the conveyor frame 120, and the work load during maintenance is greatly reduced.
The number of roller bearings 182 is not limited to four, and can stably support the filtration drum 150 and can be disposed above the normal liquid level height H of the purification coolant. There may be three, or five or more.
However, in order to stably support the filtration drum 150, at least one of the plurality of roller bearings 182 is below a horizontal line I passing through the center O of the filtration drum 150 and is perpendicular to the vertical line. It is necessary to arrange in a line symmetrical position. That is, when the number of roller bearings 182 is three, it is desirable that one is disposed directly above and the remaining two are disposed at equal intervals with a central angle of 120 degrees.

  Further, as shown in FIG. 3, in order to prevent the turbid coolant from leaking out between the drain pipe 156 and the roller bearing plate 180, a convex projecting in the circumferential direction on the outer peripheral surface of the end of the drain pipe 156. A ground packing 188 made of carbonized fiber is disposed between the portion 156 a and the roller bearing plate 180 so as to be in close contact with the outer peripheral surface of the drain pipe 156. In order to prevent the ground packing 188 from being worn by chips, a steel chip intrusion prevention plate 157 is welded to the convex portion 156a. A sponge rubber 183 is disposed between the chip intrusion prevention 157 and the gland packing 188, and the rigid gland packing 188 is pressed against the roller bearing plate 180 by using the restoring force of the sponge rubber 183 to convey the conveyor frame. 120 can errors are absorbed. Further, a tapping screw 153 is screwed into the chip intrusion prevention plate 157 from the inside to the outside of the conveyor frame 120 and the tip of the screw 153 protrudes from the chip intrusion prevention plate 157. By causing the ground packing 188 to bite into the tip of the tapping screw 153, the anti-rotation function is achieved.

  In FIG. 3, a member denoted by reference numeral 158 is a chip intrusion preventing member that is welded and fixed to the chip intrusion preventing plate 157 for dimensioning the insertion portion of the ground packing 188. The member denoted by reference numeral 181 is a roller bearing plate 180 for the purpose of keeping the gap between the rotating portion of the filtration drum 150 and the peripheral edge of the circular opening 120a of the conveyor frame constant and centering the roller bearing plate 180. It is the space | interval holding member currently fixed by welding.

  As described above, the chip sorting and discharging apparatus 100 according to the embodiment of the present invention has a structure in which the roller bearing 182 is located outside the conveyor frame 120 and does not contact the turbid coolant, and the filter drum 150 is removed from the apparatus. Since the roller bearing 182 can be removed without taking it out, deterioration and wear of the roller bearing 182 can be suppressed, the life of the apparatus can be extended, the maintenance work load can be reduced, and the operating rate of the apparatus can be improved.

  Further, since the diameter of the drainage port 129 and the diameter of the filtration drum 150 can be made substantially equal, the liquid level of the turbid coolant when the apparatus is stopped can be made lower than the conveyance side horizontal part 141 of the hinge belt 140, and the apparatus Since the operation state of can be visually checked, the operability in use is improved.

  Further, since the filtration drum 150 is rotatably supported by the plurality of roller bearings 182, the metal bearings around the entire circumference of the filtration drum 350 as used in the prior art are not required, so that the cost of the apparatus can be reduced. Further, the roller bearing 182 is a highly available component and can be replaced on the user side in a short delivery time, so that maintenance costs can be reduced.

  Further, since the roller bearing 182 is disposed above the normal liquid level height H of the purification coolant, the roller bearing 182 is prevented from being exposed to the state of being immersed in the purification coolant for a long time. Therefore, the life of the roller bearing 182 can be extended.

In addition, a gland packing 188 is provided on the outer peripheral surface of the drain pipe 156 between the convex portion 150a projecting in the circumferential direction on the outer peripheral surface of the drain pipe 156 and the roller bearing plate 182. Since the gap between the drain pipe 156 and the roller bearing plate 182 is sealed due to the close contact, the cleanliness of the apparatus is improved without leakage of turbid coolant.
Moreover, since the gland packing 188 can be exchanged from the outside of the conveyor case 120, the maintenance work load can be reduced and the operating rate of the apparatus can be improved, and the effect is enormous.

  The chip sorting and discharging apparatus of the present invention solves the long-standing problems required of the coolant system, such as the improvement of the environment of the work site, the improvement of the operating rate of the machine tool, the reduction of the maintenance work load, Its industrial applicability is extremely high.

The schematic side view of the chip separation discharge apparatus of a present Example. Sectional drawing in the arrow II-II line | wire of FIG. The enlarged view of the III section of FIG. FIG. 4 is an exploded three-dimensional view of part IV in FIG. 2. The perspective view of the filtration drum of the chip separation discharge apparatus of a present Example. The schematic side view of the conventional chip classification discharge apparatus. Sectional drawing in the arrow VII-VII line of FIG.

Explanation of symbols

100, 300 ... Chip sorting and discharging device 120, 320 ... Conveyor frame 120a ... Circular openings 121, 321 (of the conveyor frame) ... Conveying side inclined frames 122, 322 (of the conveyor frame) .. discharge section frame 123 (of conveyor frame) return vertical frame 124 (of conveyor frame), horizontal floor frame 125, 325 (of conveyor frame), tail (of conveyor frame) Part frames 126, 326 ... side frames 127, 327 (conveyor frame) inspection windows 128, 328 ... (conveyor frame) chip outlets 129, 329 ... (conveyor frame) Drain port 130, 330 (conveyor frame) ... Turbid coolant reservoir 14 340... Hinge belt 141, 341... Transport side horizontal part 142, 342... Upper rotation end part 143, 343... (Return side of hinge belt) Horizontal part 144, 344 ... Lower circular end part 150 (350) of hinge belt ... Filtration drum 151, 351 ... Drum rod 152, 352 (of filtration drum) ... Filtration (of filtration drum) Filter 153 ... Tapping screws 154, 354 ... Hose bands 155, 355 (of the filtration drum) Sprocket teeth 156 (of the filtration drum) Drain pipe 156a (of the filtration drum) ... (Drain pipe) ) Projection 157... Chip entry prevention plate 158 (of filtration drum)... Chip entry prevention member 160, 360. ... Drive sprockets 172, 372 ... Driven sprocket 180 ... Roller bearing plate 181 ... Spacing member 182 ... Roller bearing 183 ... Sponge rubber 184 ... Washer 185 ... Bearing seat 186... Bolt 188... Ground packing 189... Frame reinforcing plate 190, 390... Purification coolant storage tank 323... Return side inclined frame 353 (of conveyor frame). Drum side plate 356 ・ ・ ・ Metal bearing 380 ・ ・ ・ Drain pipe 382 ・ ・ ・ Oil seal B ・ ・ ・ Chip collection box H ・ ・ ・ Liquid level height I (of turbid coolant at normal time) ・ ・ ・ (Filtration Horizontal line K (through the center of the drum) ... Chip L ... Horizontal line M (of the turbid coolant level when the machine is stopped)・ ・ ・ Machine tool O ・ ・ ・ Center of filtration drum

Claims (3)

A turbid coolant storage tank provided at a lower horizontal portion of a conveyor frame into which turbid coolant containing chips discharged from a machine tool is charged, and a cylindrical filter drum that purifies the turbid coolant into a purification coolant And a chip sorting and discharging device having a conveyor that circulates in the conveyor frame and scoops up the chips and discharges the chips to the outside from a chip discharge port provided at the head of the conveyor frame.
The filtration drum has drain pipes at both ends, and each end of the drain pipe is located in a pair of circular openings provided on the side surface of the conveyor frame, and has an outer diameter larger than the diameter of the circular opening. An annular roller bearing plate having a diameter and an inner diameter in contact with the outer peripheral surface of the end of the drain pipe is screwed from the outside on the side surface of the conveyor frame concentrically with the circular opening, and on the outer surface of the roller bearing plate. A plurality of roller bearings that contact the outer peripheral surface of the drain pipe are pivotally provided.   The chip sorting and discharging device according to claim 1, wherein the roller bearing is disposed above a normal liquid level of the purification coolant.   A gland packing that prevents leakage of turbid coolant is disposed in close contact with the outer peripheral surface of the drain pipe between the convex portion protruding in the circumferential direction on the outer peripheral surface of the end of the drain pipe and the roller bearing plate. The chip sorting and discharging apparatus according to claim 1 or 2, wherein the chip sorting and discharging apparatus is provided.

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