Coolant cleaner

Abstract

To provide a coolant cleaner with a low running cost by circulating a coolant by using an air flow.SOLUTION: A coolant cleaner 100 includes: a housing 10 that contains a filter unit 20 and filtered regenerated coolant; an air flow path 30 that supplies and discharges air; a coolant supply flow path 40 which allows the supply of processed coolant to the internal space 11 and has coolant flow switching means 44 for regulating the discharge of the processed coolant from the internal space 11; and a coolant discharge flow path 50 that only allows flow to the outside of the housing 10 and discharges the regenerated coolant when air is supplied to the internal space 11. A float 34 that rises and falls together with the liquid level of the regenerated coolant is contained in the air flow path 30. When the liquid level of the regenerated coolant reaches a set height, the communication part is blocked by the float 34, the supply of coolant after machining is stopped, and the regenerated coolant is discharged from the coolant discharge flow path 50 by the air pressure from the air inlet 31.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a coolant cleaner.

Background Art

[0002] A coolant cleaner that recovers the coolant after processing used for cooling a workpiece in a processing machine typified by a cutting machine from the processing machine and separates processing machine discharges such as cutting powder is known. As such a coolant cleaner, for example, a configuration as disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2008-12603) is known.

[0003] According to the coolant cleaner disclosed in Patent Document 1, processing machine discharges can be separated from the coolant after processing discharged from the processing machine, and the coolant can be reused.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the coolant cleaner disclosed in Patent Document 1, a plurality of pumps for circulating the coolant are used. Since the coolant has high permeability to metal, if the pump is immersed in the coolant, the pump is likely to be damaged. In addition, depending on the combination of the coolant and the metal material of the workpiece, there is a risk of ignition, so the pump must be explosion-proof. Thus, in order to use the coolant cleaner safely and continuously, the use of expensive pumps and frequent maintenance of the pumps are required, resulting in high running costs.

Means for Solving the Problems

[0006] Therefore, the present invention is for solving the above problems, and its object is to provide a coolant cleaner with low running costs by circulating a coolant using an air flow, eliminating the need to use an explosion-proof pump and frequent maintenance of the pump.

[0007] As a result of the inventors' intensive research to solve the above problems, the following configuration was conceived. That is, the present invention is a coolant cleaner that separates the machining waste mixed in the coolant after machining containing cutting powder and discharges it as a regenerated coolant. The coolant cleaner includes a filter unit that separates the machining waste from the coolant after machining, a housing that houses the regenerated coolant filtered by the filter unit, an air flow path that communicates with the housing and supplies and discharges air to and from the internal space of the housing by switching the flow direction of the air flow introduced from the air inlet by a flow path switching means, a coolant supply flow path that communicates with the housing, allows the supply of the coolant after machining to the filter unit by the suction force when the air is discharged from the internal space of the housing, and can regulate the discharge of the coolant after machining from the internal space of the housing to the outside by the pressure of the internal space of the housing when the air is supplied to the internal space of the housing, and a coolant discharge flow path that communicates with the housing, allows only the flow from the housing to the outside of the housing, and discharges the regenerated coolant to the outside of the housing by the pressure of the internal space of the housing when the air is supplied to the internal space of the housing. The air flow path houses a float that moves up and down in the height direction together with the liquid level height of the regenerated coolant stored in the housing. In the process where the air is discharged from the internal space of the housing by the air flow and the coolant after machining is supplied to the filter unit by the coolant supply flow path, when the liquid level height of the regenerated coolant reaches a preset height position, the communication part between the air flow path and the housing is blocked by the float, so that the supply of the coolant after machining to the housing stops. In the process where the air is supplied to the internal space of the housing by the air flow and the supply of the coolant after machining to the filter unit by the coolant supply flow path is stopped, the regenerated coolant is discharged from the coolant discharge flow path to the outside of the housing by the pressure generated by the supply of the air from the air inlet to the internal space of the housing. It is characterized by being a coolant cleaner.

[0008] By circulating the coolant using an air flow, it becomes possible to eliminate the need to use an explosion-proof pump and to perform frequent maintenance on the pump, and to provide a coolant cleaner with low running costs.

[0009] Also, it is preferable that at least the attachment portions to the housing of the air flow path and the coolant supply flow path are integrated.

[0010] Thereby, the structure at the attachment portion to the housing can be simplified, and the coolant cleaner can be manufactured at a lower cost.

[0011] Also, it is preferable that the flow path switching means and the coolant circulation switching means are connected so as to be interlockable.

[0012] Thereby, the operability of the coolant cleaner is improved.

[0013] Also, the inner bottom surface of the housing is preferably formed as an inclined surface, and the lower end portion of the coolant discharge flow path is preferably disposed at a position above the lowermost position of the inclined surface.

[0014] Thereby, it is possible to prevent the mixing of machining discharges into the purified coolant.

[0015] Also, the filter unit includes a bottomed cylindrical body whose bottom surface and side circumferential surface are formed of perforated plates, a basket having a grip portion attached to the bottomed cylindrical body, and a mesh material disposed on the inner side surface of the bottomed cylindrical body. The housing is provided with an openable lid and a seal member disposed at the contact portion between the lid and the housing, and it is preferable that the filter unit is detachably accommodated in the opening when the lid is opened.

[0016] Thereby, the labor for disposing of machining discharges can be reduced.

[0017] Further, it is preferable that a notch extending in the extending direction of the coolant supply passage is formed in a part of the outer peripheral edge of the suction port of the processed coolant in the coolant supply passage.

[0018] Thereby, when supplying the processed coolant to the internal space of the housing, clogging of the processed coolant with machining waste at the nozzle tip is prevented, and the processed coolant can be reliably supplied to the internal space of the housing.

Effect of the Invention

[0019] The configuration of the coolant cleaner in the present invention circulates the coolant using an air flow, so that it is not necessary to immerse a machine for circulating the coolant in the coolant, and it is not necessary to use an explosion-proof pump or perform frequent maintenance on the pump. Therefore, it is possible to provide a coolant cleaner with low introduction costs and running costs and high reliability in continuous use.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0021] Hereinafter, an embodiment of the coolant cleaner 100 according to the present invention will be specifically described with reference to FIGS. 1 to 9. As shown in FIGS. 1 to 4, the coolant cleaner 100 in this embodiment includes a housing 10, a filter section 20, an air flow path 30, a coolant supply flow path 40, a coolant discharge flow path 50, a coolant circulation pipe 80, and a connection meter R1. The downstream end of the coolant circulation pipe 80 communicates with the coolant supply flow path 40 and the coolant discharge flow path 50 via a joint 70. A nozzle 82 is attached to the tip of the coolant circulation pipe 80 and is inserted into the processed coolant storage tank 90.

[0022] In the housing 10 of this embodiment, casters 12 with a locking function are attached to the bottom surface, and it can be moved on the installation surface by pushing the handle 10A or the like. As shown in FIGS. 5 to 7, the lid 10B of the housing 10 can be opened and closed by a hinge 10E, and by opening the lid 10B, access to the internal space 11 (filter section 20) from the upper surface of the housing 10 becomes possible. A seal member 10C is attached along the outer peripheral edge of the lid 10B on the lower surface side, which is the contact portion of the lid 10B with the housing 10. On the upper surface of the housing 10, fasteners 10D for pressing the lid 10B in a closed state against the upper surface of the housing 10 are attached at a plurality of locations along the outer peripheral edge of the lid 10B. A stepped portion 10F is formed on the outer peripheral edge of the opening when the lid 10B is opened, and the flange portion 21 of the filter section 20 is placed on this stepped portion 10F. The filter section 20 held on the stepped portion 10F in this way is accommodated in the housing 10 in a detachable state.

[0023] In addition, a part of the air flow path 30, the coolant supply flow path 40, and the coolant discharge flow path 50 are accommodated in the internal space 11. As shown in FIGS. 1 and 8, the inner bottom surface 14 of the housing 10 is formed into an inverted quadrangular pyramid-shaped inclined surface that gradually slopes downward from the outer portion of the housing 10 toward the central position in the plane. A discharge hole 16 is disposed at the lowest portion of the inner bottom surface 14 (the central position in the plane of the housing 10), and a drain pipe 18 is connected to the discharge hole 16. A manual opening / closing lever 19 is disposed at the tip of the drain pipe 18.

[0024] As shown in FIGS. 1 and 7, the filter unit 20 includes a bottomed cylindrical body 22 whose bottom surface and side circumferential surface are formed by perforated plates, a basket 24 having a grip portion 23 attached to the opening of the bottomed cylindrical body 22, and a mesh material 25 disposed on the inner surface of the bottomed cylindrical body 22. Here, punching metal is used as the perforated plate, but the perforated plate is not limited to punching metal. The grip portion 23 is rotatably attached to the opening (opening surface) of the bottomed cylindrical body 22. The mesh size of the mesh material 25 can be appropriately selected according to the size of the machining waste K1 typified by cutting powder. The mesh material 25 in the present embodiment is detachably attached to the inner surface of the bottomed cylindrical body 22. The filter unit 20 formed in this way is mounted in a suspended state in the internal space 11 of the housing 10 by holding the flange portion 21 on the stepped portion 10F of the upper surface opening of the housing 10.

[0025] As shown in FIG. 1, the air flow path 30 includes an air inlet 31, an on / off switching lever 32, an air flow pipe 33, and an air discharge pipe 36. The air inlet 31 is for connecting a tube connected to a compressed air supply machine (not shown) typified by a compressor, and is formed in a nipple shape. The on / off switching lever 32 switches the on / off of the inflow of the air flow supplied to the air inlet 31 into the air flow path 30. The air flow pipe 33 is connected to the air inlet 31 and communicates with the internal space 11 of the housing 10, and supplies and discharges air to and from the internal space 11 of the housing 10 by the air flow supplied from the air inlet 31.

[0026] As shown in FIGS. 1, 5, and 6, a float 34 is accommodated in the internal space of the air flow pipe 33 so as to be movable in the pipe length direction. Further, an opening 35 that opens into the internal space 11 is formed in a part of the side peripheral surface of the air flow pipe 33. Furthermore, a reduced diameter portion 38 is formed in the internal space of the air flow pipe 33 so as to be aligned with the height position of the lower surface of the lid body 10B. When the float 34 is separated from the reduced diameter portion 38, the internal space 11 communicates with the outside of the housing 10 through the opening 35, the air flow pipe 33, the reduced diameter portion 38, and the air discharge pipe 36. When the float 34 that has risen in the air flow pipe 33 together with the liquid level of the regenerative coolant abuts against the reduced diameter portion 38, the reduced diameter portion 38 is blocked, so that the internal space 11 of the housing 10 is blocked from the outside. Since the float 34 protrudes from above the liquid level of the regenerative coolant, a gap (not shown) is formed between the liquid level of the regenerative coolant in the state where the reduced diameter portion 38 is blocked by the float 34 and the lower surface of the lid body 10B.

[0027] The air discharge pipe 36 communicates with the air inlet 31 and is disposed outside the housing 10, and discharges the air flow supplied from the air inlet 31 to the outside of the housing 10. The air discharge pipe 36 is provided with a flow path switching means 37 including a switching valve 37A for switching on and off the discharge of the air flow (the flow direction of the air flow introduced from the air inlet 31) and an on-off switching operation lever 37B for switching the switching valve 37A. When the discharge of the air flow from the air discharge pipe 36 is turned on by the flow path switching means 37, as shown by the broken line arrow in FIG. 1, due to the suction force of the air flow discharged from the air discharge pipe 36, the air in the internal space 11 is sucked from the opening 35 of the air flow pipe 33 and discharged to the outside of the housing 10 via the air discharge pipe 36. As a result, the internal space 11 of the housing 10 is in a decompressed state.

[0028] On the contrary, when the air flow discharge from the air discharge pipe 36 is turned off by the flow path switching means 37, the air flow supplied from the air inlet 31 is supplied into the internal space 11 of the housing 10 from the opening 35 of the air flow pipe 33 as indicated by the solid arrow in FIG. 1, and the internal space 11 is pressurized. By increasing or decreasing the pressure in the internal space 11 of the housing 10 by operating the flow path switching means 37 in this way, it is possible to supply the processed coolant to the internal space 11 of the housing 10 and discharge the regenerated coolant from the internal space 11 of the housing 10.

[0029] The coolant supply flow path 40 is integrally formed with the air flow path 30 at the attachment portion with the lid body 10B. The coolant supply flow path 40 includes a processed coolant supply pipe 42, a switching valve 44A for switching on and off the flow of the processed coolant in the processed coolant supply pipe 42 (the allowable state and restricted state of the flow of the processed coolant), and a switching valve operation lever 44B for operating the switching valve 44A, and has a coolant flow switching means 44. The supply-side end of the processed coolant supply pipe 42 is connected to the joint 70, and merges into the coolant flow pipe 80 together with the coolant discharge pipe 52 of the coolant discharge flow path 50 described later.

[0030] In the present embodiment, the on-off switching operation lever 37B of the flow path switching means 37 and the switching valve operation lever 44B of the coolant flow switching means 44 are connected by a connecting rod 60. When one of the on-off switching operation lever 37B or the switching valve operation lever 44B is switched, the other also interlocks to be in a state corresponding to the switching operation. Specifically, when the on-off switching operation lever 37B is in a state of discharging the air flow from the air discharge pipe 36, the switching valve operation lever 44B is connected by the connecting rod 60 so that the processed coolant is supplied from the processed coolant supply pipe 42 to the internal space 11.

[0031] The coolant discharge passage 50 is disposed separately from the air passage 30 and the coolant supply passage 40. The coolant discharge passage 50 in the present embodiment has a coolant discharge pipe 52 communicating with the internal space 11 of the housing 10 and a check valve 54 disposed on the path of the coolant discharge pipe 52. The end portion (lower end portion) of the coolant discharge pipe 52 on the side communicating with the housing 10 is disposed at a planar position (i.e., a position above the lowermost position of the inclined surface on the inner bottom surface 14) close to the side peripheral surface position of the housing 10 on the inner bottom surface 14 of the housing 10. According to the coolant discharge pipe 52 disposed in this way, it is advantageous in that the suction of the fine machining machine discharge K1 that has passed through the filter portion 20 staying on the inner bottom surface 14 of the housing 10 is prevented.

[0032] Also, a check valve 54 is disposed in the middle portion of the coolant discharge pipe 52. As a result, the regenerated coolant flowing through the coolant discharge pipe 52 is only allowed to flow from the internal space 11 of the housing 10 to the outside of the housing 10. Therefore, even when the internal space 11 of the housing 10 is in a depressurized state, the suction of foreign matter in the external space of the housing 10 into the internal space 11 of the housing 10 via the coolant discharge pipe 52 is prevented. Further, the discharge side end portion of the coolant discharge pipe 52 is connected to a joint 70 and merges into a coolant flow pipe 80 also connected to the joint 70.

[0033] In this embodiment, the coolant circulation pipe 80 supplies the processed coolant from the processed coolant storage tank 90 to the housing 10, and supplies the regenerated coolant from the housing 10 to a regenerated coolant storage tank (not shown). Thus, the coolant circulation pipe 80 in this embodiment also serves as a part of the coolant supply passage 40 and the coolant discharge passage 50. A nozzle 82 is detachably attached to the tip end portion of the coolant circulation pipe 80 on the side opposite to the housing 10. As shown in FIG. 9, a notch 84 extending in the extension direction of the coolant circulation pipe 80 (coolant supply passage 40) is formed in a part of the outer peripheral edge of the tip opening (suction port for the processed coolant) of the nozzle 82. By adopting such a nozzle 82 having the notch 84, as shown in FIG. 1, the tip portion of the nozzle 82 inserted into the processed coolant storage tank 90 is prevented from being in close contact with the bottom surface of the processed coolant storage tank 90 or the processing machine discharge K1. Therefore, the nozzle 82 can surely suck up the processed coolant and supply it to the internal space 11 of the housing 10. The nozzle 82 when not in use is held by a nozzle holder 86 erected on the upper surface of the lid body 10B.

[0034] The processed coolant storage tank 90 temporarily stores the processed coolant recovered from the coolant recovery section of a processing machine (not shown), and since a known configuration can be adopted, detailed description thereof is omitted here. Instead of disposing the processed coolant storage tank 90, a configuration in which the end portion on the processed coolant supply side of the coolant circulation pipe 80 is connected to the coolant recovery section of the processing machine can also be adopted.

[0035] A specific method of using the coolant cleaner 100 described above will be explained. The user connects a pipe (not shown) that supplies compressed air from a compressor to the air inlet 31. Subsequently, the user operates the on / off switching operation lever 37B of the flow path switching means 37 to put the air flow from the air discharge pipe 36 into a state of being discharged, and then operates the on / off switching lever 32 to turn on the supply of the air flow from the air inlet 31. Although the air inlet 31 communicates with both the air flow pipe 33 and the air discharge pipe 36, since the flow path cross-sectional area of the air discharge pipe 36 is significantly larger than that of the reduced-diameter portion 38 of the air flow pipe 33, almost all of the air flow that has flowed in from the air inlet 31 is discharged to the outside from the air discharge pipe 36. As a result, the internal space of the air flow pipe 33 is depressurized, and the air in the internal space 11 of the housing 10 is sucked out of the housing 10 from the opening 35 and the reduced-diameter portion 38, and the internal space 11 of the housing 10 is also depressurized.

[0036] A part of the post-process coolant supply pipe 42 communicates with the internal space 11 of the housing 10. A coolant flow pipe 80 inserted into the post-process coolant storage tank 90 is connected to the post-process coolant supply pipe 42. Also, when the on / off switching operation lever 37B of the flow path switching means 37 is operated, since the inflow of the post-process coolant into the internal space 11 of the housing 10 through the post-process coolant supply pipe 42 is allowed, the post-process coolant is supplied from the post-process coolant storage tank 90 to the internal space 11 of the housing 10. The post-process coolant supply pipe 42 opens into the internal space of the filter section 20. Therefore, the post-process coolant passes through the filter section 20 from the inside to the outside, so that machining waste K1 such as cutting powder mixed in the post-process coolant is filtered and stored as the regenerated coolant in the internal space 11 of the housing 10. A coolant discharge pipe 52 also communicates with the internal space 11 of the housing 10, but air and foreign matter from outside the housing 10 are not supplied to the internal space 11 of the housing 10 by the check valve 54.

[0037] The supply process of the processed coolant to the internal space 11 of the above-mentioned housing 10 is continuously carried out while supplying an air flow to the air inlet 31, and the regenerated coolant is sequentially stored in the internal space 11 of the housing 10. When the liquid level of the regenerated coolant reaches the height position of the air flow pipe 33, the float 34 rises in the height direction of the air flow pipe 33 together with the liquid level of the regenerated coolant. When the liquid level of the regenerated coolant stored in the internal space 11 of the housing 10 reaches the full level position, the float 34 abuts against the reduced diameter portion 38, and the internal space 11 of the housing 10 and the air discharge pipe 36 are blocked. As a result, the air flow that reduces the pressure in the internal space 11 of the housing 10 also stops, and the supply of the processed coolant from the processed coolant supply pipe 42 also stops. The user can check the pressure state of the internal space 11 of the housing 10 while supplying the air flow to the air inlet 31 by checking the connection meter R1 provided on the housing 10.

[0038] If, despite flowing an air flow into the air inlet 31, the value of the connection meter R1 does not indicate a depressurized state (the same value as the atmospheric pressure), it means that the processed coolant stored in the internal space 11 of the housing 10 is full. The user operates the on-off switching operation lever 37B of the flow path switching means 37 to regulate (stop) the discharge of the air flow from the air discharge pipe 36. By this operation, the switching valve operation lever 44B rotates together with the on-off switching operation lever 37B, and the flow path of the processed coolant supply pipe 42 is blocked. At this time, the user may also operate the on-off switching lever 32 simultaneously to stop the supply of the air flow from the air inlet 31. Further, the user may take out the coolant flow pipe 80 from the processed coolant storage tank 90, clean the internal space of the coolant flow pipe 80, and then insert the coolant flow pipe 80 into a regenerated coolant storage tank (not shown).

[0039] Next, the user operates to turn off the connecting rod 60 between the switching lever 37B and the switching lever 44B, and then operates the on / off switching lever 32 again to resume the supply of the air flow from the air inlet 31. When the air flow is supplied from the air inlet 31 in this state, no air flow is discharged from the air discharge pipe 36, and the entire amount of the air flow from the air inlet 31 is supplied to the air flow pipe 33. As a result, the air flow presses down the float 34 that was pressing the reduced-diameter portion 38 from the inner space side of the housing 10, and the air flow is supplied to the inner space 11 of the housing 10. The float 34 is located on the inner space 11 side of the housing 10 in a depressurized state and has a gap between the lower surface of the lid body 10B and the liquid level of the regenerative coolant, so the blocked state of the reduced-diameter portion 38 is easily released by the air flow from the air inlet 31.

[0040] When the inner space 11 of the housing 10 is pressurized in this way, the regenerative coolant is pushed into the coolant discharge pipe 52 from the inner space 11 of the housing 10, and the regenerative coolant is discharged into the regenerative coolant storage tank via the coolant discharge pipe 52. The discharge process of the regenerative coolant from the inner space 11 of the housing 10 is continuously performed while the supply of the air flow from the air inlet 31 is being carried out. The user can check the numerical value of the coupling meter R1 and, if the regenerative coolant is not discharged even though the pressure in the inner space 11 of the housing 10 is in a pressurized state, can determine that the regenerative coolant in the inner space 11 of the housing 10 has become empty.

[0041] The user alternately and repeatedly executes a process of supplying the processed coolant to the internal space 11 of the housing 10 and storing the regenerated coolant in the internal space 11 of the housing 10, and a process of discharging the regenerated coolant stored in the internal space 11 of the housing 10. In the present embodiment, the process of supplying the processed coolant to the internal space 11 of the housing 10 and storing the regenerated coolant and the process of discharging the regenerated coolant stored in the internal space 11 of the housing 10 are counted as one processing frequency. When the number of processing times by the coolant cleaner 100 reaches the preset number of processing times, the user opens the lid 10B, takes out the filter unit 20, and discharges the machining waste K1 accumulated in the basket 24. The user may replace the mesh material 25 as necessary. At the same time or when the preset number of processing times is reached, it is preferable to operate the opening / closing lever 19 to discharge the fine machining waste K1 and the like accumulated on the inner bottom surface 14 of the housing 10 to the outside of the housing 10 through the discharge hole 16 and the drain pipe 18.

[0042] As described above, according to the coolant cleaner 100 in the present embodiment, since the pump is not immersed in the coolant liquid and the processed coolant is supplied and the regenerated coolant is discharged in a non-contact manner with the coolant liquid using air pressure, the use of the pump becomes unnecessary. In addition, the maintenance frequency of the coolant cleaner 100 can be reduced. Therefore, it is advantageous in that the initial cost and running cost of the coolant cleaner 100 can be significantly reduced.

[0043] The coolant cleaner 100 in the above embodiment has been described. However, the coolant cleaner 100 according to the present invention is not limited to the above embodiment. For example, in the above embodiment, the air flow path 30 and the coolant supply flow path 40 are integrated at the lid 10B of the housing 10, and an example of a simplified seal structure at the communication part of the lid 10B, the air flow path 30, and the coolant supply flow path 40 is illustrated. However, it is not limited to this form. The air flow path 30 and the coolant supply flow path 40 can also adopt a form in which they are made independent and communicated with the lid 10B of the housing 10. Further, the air flow path 30 and the coolant supply flow path 40 may adopt a form in which they communicate with the internal space 11 of the housing 10 at a part different from the lid 10B.

[0044] Also, in the above embodiment, the post-process coolant supply pipe 42 and the coolant discharge pipe 52 are connected to the coolant circulation pipe 80 via the joint 70. However, a form in which the post-process coolant supply pipe 42 and the coolant discharge pipe 52 are made independent without being connected to the coolant circulation pipe 80 can be adopted. In this case, the nozzle 82 is attached to the end of the post-process coolant supply pipe 42 on the side of the post-process coolant storage tank 90. Also, the discharge-side end of the coolant discharge pipe 52 is connected to a regenerated coolant storage tank (not shown).

[0045] Also, in the above embodiment, the configuration of the coolant flow switching means 44 having the switching valve 44A and the switching valve operation lever 44B for switching the switching valve 44A is illustrated. However, it is not limited to this configuration. As long as the coolant supply flow path 40 (post-process coolant supply pipe 42) can switch between a state in which only the flow from the outside of the housing 10 to the internal space 11 is allowed and a state in which the flow from the internal space 11 of the housing 10 to the outside is restricted, a form in which the coolant flow switching means 44 is configured as a check valve can also be adopted.

[0046] In addition, in the above embodiments, the form in which the on-off switching operation lever 37B and the switching valve operation lever 44B are connected by the connecting rod 60 is illustrated, but the present invention is not limited to this form. A form in which the on-off switching operation lever 37B and the switching valve operation lever 44B can be independently operated may be adopted.

[0047] Furthermore, a form in which the above-described embodiments and the modified examples described in each embodiment are appropriately combined can also be adopted.

Explanation of Reference Numerals

[0048] 10: Housing 10A: Handle, 10B: Lid, 10C: Sealing member, 10D: Fastener, 10E: Hinge, 10F: Step portion, 11: Internal space, 12: Caster, 14: Inner bottom surface, 16: Drain hole, 18: Drain pipe, 19: Opening / closing lever 20: Filter section 21: Flange portion, 22: Bottomed cylindrical body, 23: Gripping portion, 24: Basket, 25: Mesh material 30: Air flow path 31: Air inlet, 32: On-off switching lever, 33: Air flow pipe, 34: Float, 35: Opening, 36: Air discharge pipe, 37: Flow path switching means, 37A: Switching valve, 37B: On-off switching operation lever, 38: Reduced diameter portion 40: Coolant supply flow path 42: Processed coolant supply pipe, 44: Coolant flow switching means, 44A: Switching valve, 44B: Switching valve operation lever 50: Coolant discharge flow path 52: Coolant discharge pipe, 54: Check valve 60: Connecting rod 70: Joint 80: Coolant flow pipe 82: Nozzle, 84: Notch, 86: Nozzle holder 90: Processed coolant storage tank 100: Coolant cleaner K1: Process machine emissions R1: Connection plan

Claims

1. A coolant cleaner that separates machining machine emissions mixed in coolant after machining containing cutting powder and discharges it as recycled coolant, a filter section that separates the machining machine emissions from the coolant after machining and a housing that houses the recycled coolant filtered by the filter section, an air flow path that communicates with the housing and supplies and discharges air to and from the internal space of the housing by switching the flow direction of the air flow introduced from the air inlet by flow path switching means, a coolant supply flow path that communicates with the housing, allows the supply of the coolant after machining to the filter section by the suction force when the air is discharged from the internal space of the housing, and can regulate the discharge of the coolant after machining from the internal space of the housing to the outside by the pressure of the internal space of the housing when the air is supplied to the internal space of the housing, a coolant discharge flow path that communicates with the housing, allows only flow from the housing to the outside of the housing, and discharges the recycled coolant to the outside of the housing by the pressure of the internal space of the housing when the air is supplied to the internal space of the housing, and is provided with, in the air flow path, a float that moves up and down in the height direction together with the liquid level height of the recycled coolant stored in the housing, and when the air is discharged from the internal space of the housing by the air flow and the coolant after machining is supplied to the filter section by the coolant supply flow path, when the liquid level height of the recycled coolant reaches a preset height position, the communication part between the air flow path and the housing is blocked by the float, and the supply of the coolant after machining to the housing stops, In the process in which the air is supplied to the internal space of the housing by the air flow and the supply of the coolant after machining to the filter section by the coolant supply flow path is stopped, the recycled coolant is discharged from the coolant discharge flow path to the outside of the housing by the pressure generated by the supply of the air from the air inlet to the internal space of the housing. A coolant cleaner characterized by this.

2. The coolant cleaner according to claim 1, characterized in that at least the attachment portion to the housing of the air flow path and the coolant supply flow path is integrated.

3. The coolant cleaner according to claim 1 or 2, characterized in that the flow path switching means and the coolant flow switching means are connected in an interlockable manner.

4. The inner bottom surface of the housing is formed as an inclined surface, The coolant cleaner according to claim 1 or 2, characterized in that the lower end portion of the coolant discharge flow path is disposed at a position above the lowermost position of the inclined surface.

5. The filter section includes a bottomed cylindrical body whose bottom surface and side circumferential surface are formed by perforated plates, a basket having a gripping portion attached to the bottomed cylindrical body, and a mesh material disposed on the inner surface of the bottomed cylindrical body. The housing is provided with an openable lid body and a seal member disposed at the contact portion between the lid body and the housing, The coolant cleaner according to claim 1 or 2, characterized in that the filter section is detachably accommodated in the opening when the lid body is opened.

6. The coolant cleaner according to claim 1 or 2, characterized in that a notch extending in the extension direction of the coolant supply flow path is formed in a part of the outer peripheral edge of the suction port of the processed coolant in the coolant supply flow path.

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