JP4290395B2 - Grinding water tank device for eyeglass lens processing, eyeglass lens processing device equipped with the same, and processing rod separating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a circulating grinding water tank device that stores a grinding liquid used for peripheral processing of spectacle lenses, a spectacle lens processing device including the same, and a processing spear separation device that separates processing sputum from grinding water.
[0002]
[Prior art]
In an apparatus for processing the peripheral edge of a spectacle lens, processing is performed while supplying grinding water in order to cool a processing portion of the lens and remove processing wrinkles (debris). As a method for supplying grinding water, there are a water supply direct connection type and a circulation type which are supplied directly from the water supply. In the circulation type, the grinding water stored in the tank is pumped up by a pump, supplied to the processing apparatus main body side, and the waste water used for processing is reintroduced into the tank to circulate and use the grinding water.
[0003]
[Problems to be solved by the invention]
However, the water supply direct connection type has a problem that the processing slag contained in the waste water from the processing apparatus flows into the sewage as it is. Even in the circulation type, the plastic soot does not readily settle, so it is difficult to separate the work soot from the grinding water and take out only the work soot, and part of the work soot is easily drained into the sewage when the grinding water is replaced.
In addition, when a plastic lens is processed in a circulation type tank, bubbles are generated and the bubbles accumulate in the tank. When an antifoaming agent is not used, the tank is filled with foam only by processing a small number of lenses, so it is necessary to frequently change the grinding water in the tank.
[0004]
An object of the present invention is to provide an apparatus capable of easily separating a processing rod in a tank from grinding water in view of the above-described problems of the prior art. Moreover, let it be a technical subject to provide the apparatus which can reduce the bubble in a tank.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is characterized by having the following configuration.
(1) A detachable lid member (211) is provided on the upper part of a grinding water storage tank (210) for storing grinding water, and is supplied by a water supply pump (220) through a water supply pipe (215) attached to the lid member. pumping grinding water supply pumped grinding water to an eyeglass lens processing apparatus main body, in the grinding water tank apparatus circulating reusing grinding water discharged into the tank from the eyeglass lens processing apparatus main body,
A suds removal means for removing foam generated in the tank (300, 400), a nozzle (310, 313) provided so as to be positioned above the water surface of the grinding water and the foam pumping grinding water from the tank has a removal suction pump (305), the grinding water pumped up by the suds removal suction pump from the tank is injected from the nozzle or with a defoaming device (300) for collapsing foam, or the water level of the grinding water It has a foam suction pipe (403) and a foam suction pump (405) provided so as to be positioned above, and the foam sucked by the foam suction pump through the foam suction pipe is discharged to the foam discharge tank. Foam removing means having a foam removing device (400) ;
Wherein attached to the lid member, the inside of the tank a partition plate provided between the water supply chamber side of the waste water from the eyeglass lens processing apparatus main body is located, the water supply pipe and drain water casting chamber side to be turned, a partition plate so as to provide a gap which grinding water flows between the inner surface and the bottom surface of the tank,
A filter disposed in the bottom of the tank with a gap that grinding water flows under the partition plate (331), provided as a hollow portion which is sealed between the bottom of the tank is formed The filtered filter,
A suction pipe filter which is linked to the hollow portion of the filter (335), connected to a suction pipe for the filter, suction filter the grinding water filtered by the filter to the suction through the hollow portion and the suction pipe filter A grinding water suction means having a pump (333) ;
It is characterized by providing.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of an entire eyeglass lens processing apparatus according to the present invention. The spectacle lens processing apparatus is generally composed of a processing apparatus main body 1, a table 100 on which the processing apparatus main body 1 is placed, and a circulating grinding water tank unit 200.
[0007]
Inside the housing of the processing apparatus main body 1, two lens rotation shafts 2R, 2L for holding the lens LE to be processed, a carriage portion 3 on which the lens rotation shafts 2R, 2L are rotatably mounted, and a periphery of the lens LE are processed. In order to do so, a processing mechanism portion 10 having a grindstone 5 attached to the rotary shaft 6 is disposed. The carriage unit 3 is configured to be movable in the axial direction of the lens rotation shaft and movable relative to the grindstone 5. The processing mechanism section 10 can be configured in a manner well known in Japanese Patent Application Laid-Open No. 5-212661 by the applicant of the present application, and therefore detailed description thereof is omitted.
[0008]
A processing chamber 9 is formed by a waterproof cover 8 inside the processing apparatus main body 1. A nozzle 11 for injecting grinding water extends into the processing chamber 9, and the nozzle 11 is connected to the suction pump 220 of the tank unit 200 and a water supply hose 221. During the processing of the lens LE, grinding water is jetted from the nozzle 11, and the jetted grinding water and grinding dust are received by the waterproof cover 8. A drainage hose 201 is connected to the drainage port at the bottom of the waterproof cover 8, and the drainage hose 201 extends toward the tank 210 for storing the grinding water in the tank unit 200.
[0009]
The structure of the tank part 200 is demonstrated based on FIGS. 1-3. In FIG. 1, reference numeral 211 denotes a lid for substantially sealing the inside of the tank 210, and is detachably fitted into an opening at the top of the tank 210. A partition plate 230 that divides the tank 210 into a drain input chamber side 210a and a water absorption chamber side 210b is fixed at the center of the lid 211. However, as shown in FIG. 2, a gap through which the grinding water flows is provided between the partition plate 230 and the inner side surface and the bottom surface of the tank 210.
[0010]
A connection port 212 to which the drainage hose 201 is connected is provided in the lid 211 of the drainage chamber side 210 a, and drainage guided by the drainage hose 201 is introduced into the tank 210. A water absorption pipe 215 for supplying grinding water to the processing apparatus main body 1 is attached to the lid 211 on the water absorption chamber side 210b so as to extend downward. The water absorption pipe 215 is connected to the suction pump 220 by a water absorption hose 217. The grinding water absorbed by the driving of the suction pump 220 is guided to the nozzle 11 on the processing apparatus main body 1 side via the water supply hose 221.
[0011]
The partition plate 230 is provided to make it difficult for the processing soot mixed in the wastewater to reach the water inlet of the water absorption pipe 215 and to make the processing soot easily settle at the bottom of the tank. This is not necessarily required.
[0012]
The tank unit 200 is provided with a defoaming device 300 that crushes bubbles by spraying liquid (here, grinding water). The defoaming device 300 is pumped up by a water absorption pipe 301 attached to a lid 211 to absorb grinding water from the water absorption chamber side 210b, a suction pump 305 connected by this pipe 301 and a water absorption hose 303, and this suction pump 305. A hose 307 for guiding water, and a nozzle 310 for injecting water from the hose 307 to the drainage chamber side 210a.
[0013]
The nozzle 310 is attached to the upper side of the partition plate 230. As shown in FIG. 2, the nozzle 310 has a rod-like shape, and a plurality of injection ports 310a are formed on the side surfaces in the longitudinal direction so as to inject water in a substantially horizontal direction. The grinding water from the hose 307 is introduced from a connection port 311 provided near the center of the nozzle 310. Moreover, the injection port 310a is provided so that it may be located above the water surface when grinding water is put into the tank 210. In the case of the horizontally long nozzle 310 shown in FIG. 2, it is preferable that the injection port 310 a is arranged not only in the center but also near the inner walls on both sides of the tank 210 so that the water to be injected covers the inside of the tank 210 as much as possible.
[0014]
In addition, the tank unit 210 is provided with a work cake separating device 330 that facilitates sedimentation of the work cake and separates the work cake from water and dehydrates it. The processing soot separating device 330 has a filter 331 provided at the bottom of the tank 210, a pump 333 that sucks water in the tank 210 through the filter 331, a hollow portion 339 formed by the filter 331 and the bottom surface of the tank 210. A suction pipe 335 to be connected, a hose 337 for connecting the suction pipe 335 and the pump 333, and a hose 341 for introducing the grinding water sucked by the pump 333 into the tank 210 again are provided. The hose 341 is detachably connected to a connection port 343 attached to the side surface of the tank 210.
[0015]
As the filter 331, a sintered porous body is preferable. In this embodiment, since it is lightweight, durable, and has good workability, a plastic sintered porous body manufactured by sintering plastic beads is used. ing. The plastic sintered porous body is made of polyethylene, polypropylene, ethylene-vinyl acetate copolymer or the like as a raw material. In this embodiment, the filter 331 having a pore diameter of about 15 μm is used. When the inventor experimented with pore sizes of 15 μm and 70 μm, it was found that when the pore size was 70 μm, the filtered water was white turbid and the filtration accuracy was low. Furthermore, as a result of continuing filtration, it was found that the filtration speed was reduced by clogging fine processed soot in the filter. On the other hand, when the pore diameter was 15 μm, the filtered water was transparent, and it was confirmed that there was little influence on the filtration rate even when continuous filtration was performed. Therefore, it is preferable to use a filter having a pore diameter of about 15 μm smaller than 70 μm from the viewpoint of filtration accuracy and filtration speed.
[0016]
FIG. 3 is a view of the filter 331 when viewed from the bottom side. The filter 331 is installed at the bottom of the tank 210 having a circular horizontal cross section, and has a plate shape having a circular area substantially the same as the area of the bottom of the tank 210. A processing soot is volumed on the upper surface of the filter 331. The filter 331 has a thickness of 7 mm, and a lattice-like groove 331 a (hatched portion in FIG. 3) having a depth of 2 mm is formed on the lower surface of the filter 331. A suction port 331b connected to the suction pipe 335 is provided in the central groove. The groove 331a is a passage through which filtered water passes, and is formed so as to be all connected to the suction port 331b. The filter 331 is installed on the bottom surface of the tank 210 and is adhered to the inner wall of the tank 210 so as to shield the outer periphery of the filter 331, thereby sealing the grinding liquid in the tank with the bottom surface of the tank 210 and the groove 331a. A hollow portion 339 is formed, and a passage for sucking the filtered water is secured.
[0017]
The reason why the lower surface of the filter 331 has a groove structure is to prevent the filter 331 from being damaged or deformed due to the weight of the processing trough and the grinding water that are volumed on the upper surface of the filter 331. Also good. For example, the hollow portion 339 may be formed by arranging a block on the bottom surface of the filter 331 so that the bottom surface of the filter 331 is also a flat surface and a groove 331a similar to that shown in FIG. . Further, a cloth filter such as cotton having a mesh structure can be used for the filter 331. In this case, a reinforcing frame may be provided so as to form the hollow portion 339.
[0018]
In FIG. 1, reference numeral 20 denotes a control unit of the processing apparatus main body 1. In addition to the drive unit 22 that rotates the grindstone 5 and the drive unit 21 that moves the carriage unit 3, the control unit 20 is connected to the suction pumps 220, 305, and 333. The control unit 20 controls these.
[0019]
Next, use of the apparatus having such a configuration will be described. Grinding water is placed in the tank 210. At this time, the water surface is set to be 1 to 2 cm below the nozzle 310 of the defoaming device.
[0020]
When processing of the lens is started by the processing apparatus body 1, the pump 220 is driven by the control unit 20, and the grinding water sucked up from the water absorption chamber side 210 b is jetted from the nozzle 11. The grinding water and the processing soot generated at the time of processing are discharged to the drain input chamber side 210 a of the tank 210 through the drain hose 201.
[0021]
At the time of processing the lens, the pump 333 is driven by the switch 25 connected to the control unit 20 in order to promote sedimentation of the processing soot discharged into the tank 210 by the processing soot separating device 330. Of course, the control unit 20 may control so that the pump 333 is driven in conjunction with the driving of the suction pump 220.
[0022]
When the pump 333 is driven, suction pressure is applied to the hollow portion 339 formed under the filter 331, and the grinding water in the tank 210 is sucked through the filter 331 and simultaneously filtered by the filter 331. The water sucked by the pump 333 is returned into the tank 210 from the connection port 343 via the hose 341. By this suction, the processed soot is pulled to the filter 331 side, and precipitation of the processed soot is promoted. Furthermore, the turbidity of the grinding water in the tank 210 can be suppressed by the solidification of the precipitated processing soot. For this reason, it becomes possible to take in a large amount of processing rods in the tank 210.
[0023]
In addition, the plastic lens processed wrinkle first deposits a large wrinkle with a heavy weight. Since a large soot is initially volumed on the filter 331 disposed at the bottom of the tank, the filter can be prevented from being clogged, and the soot can serve as a new filter.
[0024]
The amount of the processing soot that can be allowed in the tank 210 is possible up to a level at which the processing soot settled from the suction ports of the suction pipes 215 and 301 is not sucked. Although depending on the height of the suction port of the suction pipe 215 and the like, if it is possible to precipitate about 5 to 6 liters of processing soot in a 20 liter tank, it is possible to process as many as 200 lenses.
[0025]
In addition, although the filtration speed of the filter 331 is high at the time of a filtration start, if a processing wrinkle adheres to the filter 331, speed will fall. Although the filtration speed depends on the pump performance, even if a powerful pump is used, the passage loss of the filter increases rapidly due to the increase of the passage flow rate. For this reason, driving the pump with an appropriate suction force is good without overloading the pump. In this apparatus, a gear pump using a DC motor is adopted as the pump 333, and this is driven at a constant current. Such a pump has a high motor speed and a high pump flow rate when the filter resistance (insertion loss) is low. On the other hand, when the filter resistance increases and a load is applied to the motor, a low current operation is performed, and the motor speed is controlled so as not to be overloaded.
[0026]
By the way, for the purpose of suppressing the generation of bubbles, an antifoaming agent is usually added to the grinding liquid of the circulating tank unit. However, when the grinding fluid containing the antifoaming agent is filtered by the filter 331, the filtration performance is greatly reduced by the surfactant contained in the antifoaming agent. This is because the processing soot enters the filter 331 and causes clogging. To prevent this, defoaming agents should not be used in this device. However, if an antifoaming agent is not used, a large amount of foam is generated just by processing a small amount (20 to 30) of plastic lenses, and it is necessary to immediately replace the grinding fluid.
[0027]
In order to avoid frequent replacement of the grinding fluid, foam generated without using a defoaming agent is suppressed by the defoaming apparatus 300 in this apparatus. Small processing sputum of plastic of several microns or less generated by processing does not dissolve in water. An air layer is formed on the surface of the grindstone by the high-speed rotation of the grindstone, and water and air are mixed by adding cooling water to the grindstone. Water and air are discharged from the drain hose 201 together. Bubbles are created by the processed soot that does not dissolve in the air and water. Once the foam is made, processed soot with a large particle size also adheres to the foam, and the foam becomes more difficult to collapse. If many plastic lenses are processed due to the generation of such bubbles, the inside of the tank 210 (here, the drainage chamber side 210a) is filled with bubbles.
[0028]
In order to suppress the generation of such bubbles, the suction pump 305 is driven in conjunction with the driving of the suction pump 220, and water is injected from the injection port 310a of the nozzle 310 into the drainage input chamber side 210a. Grinding water is sucked from the water absorption chamber side 210 b by driving the suction pump 305, and the water is guided to the nozzle 310 via the hose 307. Water is injected from the injection port 310a toward the inner surface of the tank 210 like a shower. The jetted water collides with the bubbles formed in the tank 210, and the bubbles are crushed by stirring the water. In this way, the processable soot contained in the foam can be separated and precipitated. Since the injection port 310a is disposed near the inner walls on both sides of the tank 210, the injected water can be applied to most of the bubbles generated in the tank 210.
[0029]
The shape and arrangement of the nozzle 310 are not limited to the above, and may be as follows. FIG. 4 is a diagram showing a modification example of the defoaming apparatus 300. The nozzle 313 shown in FIG. 4A has a hemispherical shape, and a large number of injection ports 313a are formed on the hemispherical surface. The connection port 314 is attached to the lid 211 so that the nozzle 313 is located in the vicinity of the center of the drainage chamber 210a. Water from the suction pump 305 is injected from the injection port 313a of the nozzle 313 through the hose 307 and the connection port 314, and is applied to the foam in the tank 210. Furthermore, if a mechanism for rotating the nozzle 313 is provided to change the injection direction, water is injected so as to reach the entire tank 210 (in the water drainage input chamber side 210a), and the bubbles are crushed efficiently. Can do. As for the rotation of the nozzle having the injection port, in addition to using a motor, a method of rotating using a reaction force of water pressure or a jet flow can be adopted.
[0030]
The nozzle shown in FIG. 4 (b) is an example of a rotation method using the reaction force of the jet flow. A rotation support base 321 is attached to the connection port 314 in FIG. 4 (a), and three rotation support bases 321 are provided. A rod-shaped nozzle 320 is attached. An injection port 320a is provided on the side surface of each nozzle 320, and the nozzle 320 rotates together with the rotation support base 321 by the reaction force of water injected from the injection port 320a.
[0031]
The nozzle 310 shown in FIGS. 1 and 2 also has a mechanism such as a motor that swings the nozzle 310 so that the injection angle of the water injected from the injection port 310a is repeatedly changed slightly downward from the horizontal direction. If provided, the bubbles can be crushed more efficiently. Further, the defoaming device may be configured to mechanically stir the foam by a method of rotating a rotating body having a rod-like arm. This causes the foam to rupture when the arm of the rotating body collides with the foam.
[0032]
Next, the case where the processing waste accumulated in the tank 210 is discarded will be described. In this case, the hose 341 is removed from the connection port 343 and the water sucked by the pump 333 is drained without returning to the tank 210. Since the water sucked by the pump 333 is sufficiently filtered by the filter 331, it can be drained as it is, but it may be reused by putting it in a drain drain tank prepared separately. The switch 25 is turned on to drive the pump 333. The grinding water in the tank 210 is gradually sucked through the filter 331 and discharged out of the tank 210. Finally, the water contained in the processed slag is also sucked. When the moisture content of the processed soot decreases, the processed soot cracks and air is directly sucked from the filter, making it impossible to suck water. When water is no longer discharged, the driving of the pump 333 is stopped.
[0033]
When the water can no longer be sucked, the water content of the processed soot is about 40 to 50%, and the processed soot is solidified. Since the solidified processing rod can be easily taken out by turning the tank 210 upside down, it can be disposed in a plastic bag or the like. When the water content is 50% or less, water does not ooze out from the processed soot, and the disposal process becomes easy. When the moisture content is further reduced, it may be left to dry naturally. Processed waste is treated as industrial waste by a contractor.
[0034]
As described above, the processing soot separating apparatus including the filter 331, the pump 333, and the like is provided in the circulation tank unit 200 integrally with the tank 210, but may be configured as a single unit. FIG. 5 shows an example of the configuration, 350 is a filter made of a plastic porous body, and its shape is a cylindrical shape. Lids 352 and 353 are fixed to both ends of the filter 350 so that the inside of the filter 350 is a hollow portion 351. A suction pipe 355 connected to the hollow portion 351 is attached to one lid 352, and this suction pipe 355 is connected to a suction pump 357 by a hose 356. Water sucked by the suction pump 357 is discharged from the hose 358. When discarding the processing soot collected in the tank 210, if the filter 350 is placed in the tank 210 and the suction pump 357 is operated in the same manner as described above, the grinding water in the tank 210 is filtered and sucked. Can be separated and taken out.
[0035]
A plurality of such cylindrical filters 350 may be prepared in order to accelerate the dewatering of the processed soot. Of course, if the plate-like filter 331 shown in FIGS. 1 and 3 is used, and a sealing plate is fixed to the bottom of the filter 331 so as to secure the hollow portion 339, it can be used alone. it can. In addition, the filter 350 and the like may be placed in a tank prepared separately from the tank 210, and grinding water containing a processing rod may be poured therein to dehydrate the processing rod.
[0036]
FIG. 6 schematically shows a case where a foam removing device 400 that sucks and removes bubbles generated in the tank 210 is provided instead of the defoaming device 300 included in the grinding water tank unit 200 of the eyeglass lens processing apparatus of FIG. It is a block diagram.
[0037]
In FIG. 6, a suction pipe 403 to which a suction hose 401 is connected is attached to a lid 211 on the tank 210 side so as to be positioned on the drainage input chamber 210 a side. The suction port of the suction pipe 403 is located slightly above the water surface in the drainage chamber 210a. The suction hose 401 is connected to a foam suction pump 405. The pump 405 is fixed to the top of the lid 411 of the foam discharge tank 410 that stores the sucked foam waste liquid. A drain hose 407 is connected to the pump 405, and bubbles sucked by the pump 405 are discharged from the drain hose 407 into the tank 410.
[0038]
The tank 410 is the same as the tank 210 that stores grinding water. A filtration filter 420 having the same structure as the filter 331 on the tank 210 side is provided at the bottom of the tank 410. A sealed hollow portion 421 is formed between the filter 420 and the bottom surface of the tank 410, and a suction pipe 423 is connected to the hollow portion 421. Further, a hose 425 is connected to the suction pipe 423. The hose 425 is connected to a hose 337 connected to the pump 333. Since the hose 337 is also connected to a hollow portion 339 formed in the filter 331 on the tank 210 side, the pump 333 for sucking the grinding water on the tank 210 side is commonly used as a driving source for waste liquid suction on the foam removing device 400 side. used. A dedicated pump may be provided for the waste liquid suction of the foam removing device 400, but it is advantageous in terms of cost if it is shared with the pump 333 on the tank 210 side.
[0039]
When processing the lens, the bubble suction pump 405 is driven in conjunction with the pump 220, and bubbles generated on the water surface on the drainage chamber side 210 a are sucked through the suction pipe 403 and the suction hose 401. The sucked foam is discharged to the tank 410. Since foam is also attached to the foam, the waste liquid of foam discharged to the tank 410 includes processed soot. When the pump 333 is driven, the water in the tank 410 is sucked through the filter 420 and separated from the processing soot contained in the foam waste liquid. The processed soot settles on the filter 410. The water sucked from the tank 410 side by the pump 333 is returned to the tank 210 through the hose 341 in the same manner as the water sucked from the tank 210 side.
[0040]
In the apparatus of FIG. 6, since the processing soot contained in the foam is also removed from the tank 210 side by sucking the foam, the grinding in the tank 210 is performed compared to the case where the defoaming apparatus 300 of FIG. 1 is used. The turbidity of the liquid is suppressed. In addition, since the amount of processing rods in the tank 210 is reduced, the number of cleaning operations is also reduced.
[0041]
Note that a suction path switching mechanism (such as a three-way stopcock) may be provided at a connection portion between the hose 425 and the suction pipe 335 with respect to the hose 337 so that the suction path by the pump 333 is selectively switched. The waste liquid on the tank 410 side is sucked when the processing rod is discarded, and the grinding water on the tank 210 side is always sucked. In this way, the suction pressure applied to the filter 331 on the tank 210 side can be secured without increasing the size of the pump 333.
[0042]
【The invention's effect】
As described above, according to the present invention, since the processing bar can be easily separated and taken out from the grinding water containing the processing bar placed in the tank, the processing bar can be appropriately processed. Further, during the processing of the spectacle lens, it is possible to increase the number of lenses that can be processed by accelerating sedimentation of the processing rod and reducing the number of times of exchanging the grinding water. Furthermore, bubbles generated in the tank can be reduced.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of an entire spectacle lens processing apparatus.
FIG. 2 is a diagram illustrating a configuration of an antifoaming device.
FIG. 3 is a diagram when the filter is viewed from the bottom side.
FIG. 4 is a diagram showing a modification example of the defoaming apparatus.
FIG. 5 is a diagram showing an example in which the processing rod separating apparatus is configured as a single device.
FIG. 6 is a schematic configuration diagram in the case where a foam removing device that sucks and removes foam is provided.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Processing apparatus main body 200 Grinding water tank part 210 Tank 300 Defoaming apparatus 330 Processing soot separation apparatus 331 Filtration filter 333 Suction pump 339 Hollow part 341 Hose 400 Foam removal apparatus 405 Suction pump 410 Tank 420 Filtration filter

Claims (1)

A detachable lid member (211) is provided on the upper part of the grinding water storage tank (210) for storing the grinding water, and the grinding water is supplied by the water supply pump (220) through the water supply pipe (215) attached to the lid member. pumping supplies pumping grinding water eyeglass lens processing apparatus main body, in the grinding water tank apparatus circulating reusing grinding water discharged into the tank from the eyeglass lens processing apparatus main body,
A suds removal means for removing foam generated in the tank (300, 400), a nozzle (310, 313) provided so as to be positioned above the water surface of the grinding water and the foam pumping grinding water from the tank has a removal suction pump (305), the grinding water pumped up by the suds removal suction pump from the tank is injected from the nozzle or with a defoaming device (300) for collapsing foam, or the water level of the grinding water It has a foam suction pipe (403) and a foam suction pump (405) provided so as to be located above, and the foam sucked by the foam suction pump through the foam suction pipe is discharged to a foam discharge tank. Foam removing means having a foam removing device (400) ;
Wherein attached to the lid member, the inside of the tank a partition plate provided between the water supply chamber side of the waste water from the eyeglass lens processing apparatus main body is located, the water supply pipe and drain water casting chamber side to be turned, a partition plate so as to provide a gap which grinding water flows between the inner surface and the bottom surface of the tank,
A filter disposed in the bottom of the tank with a gap that grinding water flows under the partition plate (331), provided as a hollow portion which is sealed between the bottom of the tank is formed The filtered filter,
A suction pipe filter which is linked to the hollow portion of the filter (335), connected to a suction pipe for the filter, suction filter the grinding water filtered by the filter to the suction through the hollow portion and the suction pipe filter A grinding water suction means having a pump (333) ;
A grinding water tank apparatus comprising:

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