EP1043121B1 - Deodorization system for lens-grinding machine - Google Patents
Deodorization system for lens-grinding machine Download PDFInfo
- Publication number
- EP1043121B1 EP1043121B1 EP20000250110 EP00250110A EP1043121B1 EP 1043121 B1 EP1043121 B1 EP 1043121B1 EP 20000250110 EP20000250110 EP 20000250110 EP 00250110 A EP00250110 A EP 00250110A EP 1043121 B1 EP1043121 B1 EP 1043121B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- waste water
- deodorization
- bad
- lens
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
- B24B9/146—Accessories, e.g. lens mounting devices
Definitions
- the present invention relates to a deodorization system for a lens-grinding machine, as per the preamble of claim 1.
- a deodorization system for a lens-grinding machine as per the preamble of claim 1.
- An example of such a system is disclosed by DE 44 11 537A.
- a deodorization apparatus disclosed in JP-U No. Hei 6-61444 deodorizes bad-smelling air having an offensive smell produced when a plastic lens and the like containing components that produce offensive smells at the time of being ground are ground by making a deodorization filter suck the bad-smelling air from a tank for storing a waste water (waste water tank) through a connection pipe provided separately from a drain hose.
- a deodorization apparatus disclosed in JP-A No. Hei 5-345268 guides a bad-smelling gas produced by a lens-grinding machine into a body of deodorization device from an inlet opening disposed near a lens-grinding region on the lens-grinding machine through a flexible tube, and removes the bad-smelling gas by a deodorization filter which is a lamination of a dust filter, a paper filter and activated carbon for deodorization.
- the deodorization apparatus disclosed in JP-A No. Hei 5-345268 that sucks the bad-smelling gas by making the gas flow from the inlet opening disposed near the lens-grinding region into the body of the deodorization device through the flexible tube also has a problem that the waste water produced in the grinding process is sucked accidentally to be accumulated in the deodorization apparatus so that the deodorization apparatus is deteriorated and damaged.
- DE 44 11 537 A describes a lens-grinding machine including a cooling medium tank and an air suction device, said air suction device being connected to the cooling medium tank via a dust and deodorization filter using this device there is a risk of the - deodorization filter being clogged.
- the offensive smells cause troubles in the maintenance of the waste water tank storing the waste water produced by the grinding process for grinding the aforementioned high-refraction plastic lens and the like.
- the deodorization filter will not be clogged with the waste water, the bubbles and the like and hence the deodorization system is able to deodorize the bad-smelling air produced by the grinding process effectively, even if the air containing the waste water, bubbles, cut chips and the like is sucked and deodorized.
- the bad-smelling air is sucked through the waste water tank, offensive smells produced by the grinding machine, as well as those produced in the waste water tank can be deodorized. A clogging of the deodorization means is prevented by the use of a fine filter.
- a deodorization system further including a water storage tank for storing the waste water separated from the bad-smelling air by the separation means.
- the water storage tank keeps the components of the deodorization system from being wet with the waste water to prevent the deterioration and damaging of the system.
- a deodorization system further including detection means for detecting the volume of the waste water stored in the water storage tank.
- a deodorization system in which the fine filter is interposed between and connected to the separation means and the deodorization means.
- reference numeral 1 designates a lens-grinding machine(lens grinder), and numeral 4 designates a lens as an object of grinding.
- the lens-grinding machine 1 has a grinding chamber 2 enclosing all the components of the lens-grinding machine 1 therein, a lens rotating shaft 3 disposed in the grinding chamber 2 to hold the lens 4 thereon and to rotate the same, a grindstone 5 for grinding the periphery of the lens 4, having an axis of rotation substantially parallel to the axis of the lens rotating shaft 3, and a nozzle 6 for spouting cooling water when grinding the lens 4 with the grindstone 5.
- the lens-grinding machine 1 is a well-known one. Only the least components of the lens-grinding machine 1 necessary for the description of the present invention are shown in Fig. 1.
- a cooling water circulating system A includes a waste water tank 7 disposed below the lens-grinding machine 1, a cover plate 7a covering the open upper end of the waste water tank 7, and a drain hose 8 for draining cooling water containing cut chips from the bottom of the grinding chamber 2 into the waste water tank 7. Waste water 9 is stored in the waste water tank 7.
- the cooling water circulating system A has a pump 10 fixed to the cover plate (covering member) 7a with its suction port 10a immersed in an upper part in the waste water 9.
- the pump 10 has a discharge port connected to the nozzle 6.
- the waste water 9 stored in the waste water tank 7 is pumped up through a filter, not shown, and is spouted through the nozzle 6 again as cooling water onto a working part of the grindstone 5 in contact with the lens 4.
- Fig. 1 Shown also in Fig. 1 are the upper surface 9a of the waste water 9, bubbles 9b floating on the upper surface 9a of the waste water 9, a space 11 between the upper surface 9a of the waste water 9 and the covering plate 7a.
- the bubbles 9b are formed when the cooling water is drained from the grinding chamber 2 through the drain hose 8 into the waste water tank 7.
- the space 11 is filled up with bad-smelling air having an offensive smell produced when the lens 4 is ground.
- suction hose 12 One end of a suction hose 12 which is open to the space 11 is connected the cover plate 7a. Another end of the suction hose 12 is connected to a dehydration filter (first separation means) 13. A deodorization apparatus (deodorization means) 15 is connected by another suction hose 14 to the dehydration filter 13.
- the dehydration filter 13 includes a cylindrical vessel 16 having an open upper and, a cover 17 covering the open upper end of the cylindrical vessel 16, a filter element 18 attached to the cover 17, and a drain valve 19 attached to the bottom of the cylindrical vessel 16.
- the cover 17 is provided with an inlet opening 17a and an outlet opening 17b.
- the inlet opening 17a and the outlet opening 17b are isolated from each other by the filter element 18.
- the end of the suction hose 12 on the side of the dehydration filter 13 is connected to the inlet opening 17a.
- the end of the suction hose 14 on the side of the dehydration filter 13 is connected to the outlet opening 17b.
- the cover 17 is removed from the cylindrical vessel 16 to remove the filter element 18 from the cylindrical vessel 16, which facilitates work for cleaning the filter element 18 and replacing the same with another one.
- the bad-smelling air sucked through the suction hose 12 and the inlet opening 17a into the dehydration filter 13 is filtered by the filter element 18.
- the filtered bad-smelling air is sucked through the outlet opening 17b into the suction hose 14.
- most part of bubbles, cut chips and mist of waste water is captured by the filter element 18 and is stored in a lower part of the cylindrical vessel 16.
- the waste water stored in the lower part of the cylindrical vessel 16 can be drained from the cylindrical vessel 16 by opening the drain valve 19.
- any other suitable filter may be used instead of the dehydration filter 13 mentioned in this embodiment, provided that the filter is capable of separating the bubbles, the cut chips and the mist of the waste water from the bad-smelling air.
- the deodorization apparatus 15 has an outer case 20 which is longer in the perpendicular direction than it is in the horizontal direction.
- the outer case 20 is provided with a side door 21 that opens and shuts in the directions of the arrows B in a lower part of a side wall thereof, and a top door 22 that opens and shuts in the directions of the arrows C in a top wall thereof.
- a centrifugal separator (second separation means) 23 is disposed in a lower part of the interior of the outer case 20.
- a water storage tank 24 is disposed under the centrifugal separator 23 in the outer case 20.
- the centrifugal separator 23 includes a main body 25 having a drawer space 25a in the lower part of the main body 25 and a storage chamber 25b over the drawer space 25a, and a separator body 26 disposed in the storage chamber 25b.
- the main body 25 is provided with an opening to which the end of the suction hose 14 whose another end is connected to the outlet opening 17b of the dehydration filter 13 is connected, and an opening to which a hose 40 is connected.
- the separator body 26 has a double tube constitution of an inner tube 27 and an outer tube 28 which has a diameter greater than that of the inner tube 27 and a connection hole 28a. And a cylindrical or annular passage (space) 29 is formed as a gas-liquid-separating passage with the inner tube 27 and the outer tube 28.
- the separator body 26 also has an annular bottom wall 30 joined to the lower ends of the inner tube 27 and the outer tube 28, and a disk-shaped cover plate 31 covering the open upper end of the outer tube 28.
- a small gap 32 for air passage is formed between the upper end of the inner tube 27 and the cover plate 31 by constituting the upper end of the inner tube 27 lower than that of the outer tube 28.
- the bottom wall 30 of the separator body 26 is supported on tubular support members 33 having the shape of a tube and fixed to the bottom wall 25c of the main body 25.
- the bottom wall 30 of the separator body 26 is spaced from the bottom wall 25c of the main body 25 by the tubular support members 33. Therefore, the bad-smelling air is able to flow through a space between the bottom wall 30 of the separator body 26 and the bottom wall 25c of the main body 25.
- drain passages 33a are formed through the bottom wall 30 of the separator body 26, the bottom wall 25c of the main body 25 and the tubular support members 33. Water, cut chips produced by grinding operation and the like separated from the bad-smelling air by the separator body 26 are drained through the drain passages 33a into the water storage tank 24 described later.
- connection hole 28a is formed with its axis extended tangentially to the annular passage 29 in a lower part of the outer tube 28.
- the connection hole 28a is connected by a hose 34 to a connecting opening formed in the main body 25 to which the suction hose 14 is connected.
- the bad-smelling air sucked from the suction hose 14 flows through the hose 34 tangentially into the annular passage (space) 29 before flowing into the storage chamber 25b and whirls in the annular passage 29.
- Moisture, the cut chips and the like having specific gravities greater than that of air are forced to move radially outward and pressed against the outer tube 28 by centrifugal force.
- the bad-smelling air thus cleared of the moisture and the cut chips flows through the small gap 32 into a central region of the separator body 26.
- the bad-smelling air flows through the space secured between the bottom wall 30 of the separator body 26 and the bottom wall 25c of the main body 25 by the tubular support members 33 into the storage chamber 25b as indicated by the arrows in Fig. 3.
- the bad-smelling air flows through the other connecting opening formed in the main body 25 into the hose 40.
- the centrifugal separator 23 can separate the waste water which could not have been removed by the dehydration filter 13 from the bad-smelling air.
- the waste water and the cut chips drained through the drain passages 33a is stored in the water storage tank 24.
- the water storage tank 24 is placed in the drawer space 25a so as to be slidable to right and left direction in Fig. 2.
- the door 21 is opened and the water storage tank 24 can be pulled leftward out of the outer case 20.
- a volume detection sensor (detection means) 35 is attached to an upper part of the water storage tank 24 to detect the increase of the volume of the waste water stored in the water storage tank 24 to a predetermined volume and the rise of the waste water level to a predetermined level.
- the volume detection sensor 35 may be disposed at a position on the side of the centrifugal separator 23. Upon the increase of the volume of the waste water stored in the water storage tank 24 to a predetermined volume, by detecting that, the volume detection sensor 35 inputs a detection signal to a control circuit (control means) 35a.
- the control circuit 35a When receiving the detection signal, the control circuit 35a activates an informing device 35b, such as a buzzer, a light-emitting diode or a liquid crystal display, to inform an operator that the water storage tank 24 has been substantially fully filled up with the waste water, and stops a blower 39 which will be described later.
- an informing device 35b such as a buzzer, a light-emitting diode or a liquid crystal display
- the deodorization apparatus 15 includes a deodorization device (deodorization means) 36 placed in the outer case 20 for deodorizing the bad-smelling air, a fine filter 37 detachably attached to an upper part of the deodorization device 36 for removing the moisture and the fine cut chips, a suction box 38 attached to a lower part of the deodorization device 36 for storing deodorized air temporarily, and the blower 39 disposed between the centrifugal separator 23 and the suction box 38 and held on the outer case 20 for making the air containing offensive smells flow.
- An impregnated activated carbon (a deodorizer as a body of deodorization means) 36a which absorbs the offensive smell is built-in the deodorization device 36.
- impregnated activated carbon 36a can be replaced by removing the fine filter 37. Additional separation and removal of the waste water from the air by the centrifugal separator 23, which water could not be separated and removed from the air by the dehydration filter 13 can extend the life time of the impregnated activated carbon.
- impregnated activated carbon 36a it can not be used only the impregnated activated carbon 36a, but also any one of porous alumina ceramics, ceramic balls or photo catalysts using zinc oxide (ZnO), titanium oxide (TiO 2 ) or the like, or mixtures of impregnated activated carbon and some of those materials as the deodorizer.
- the fine filter 37 is capable of further removing the moisture and the fine cut chips which could not have been removed by the dehydration filter 13 and the centrifugal separator 23 from the air.
- the fine filter 37 can be easily taken out of the outer case 20 by opening the door 22 to replace the same with a new one.
- the storage chamber 25b of the centrifugal separator 23 is connected to the fine filter 37 by the hose 40.
- the fine filter 37, the deodorization device 36 and the suction box 38 communicate with each other.
- a suction pipe 39a of the blower 39 is connected to the suction box 38 and a discharge pipe 39b of the blower 39 is connected to an opening formed in a side wall of the outer case 20.
- the bad-smelling air discharged from the centrifugal separator 23 flows into the blower 39 through the hose 40, the fine filter 37, the deodorization device 36, the suction box 38 and the suction pipe 39a, and is discharged to the outside of the outer case 20 through the discharge pipe 39b.
- the control circuit 35a activates the informing device 35b and stops the blower 39. Thus the overflow of the waste water from the water storage tank 24 can be prevented.
- the cooling water used for cooling washes off the cut chips from the lens 4, drops down the same below the lens 4 on cooling the part to be ground of the lens 4 by the grindstone 5. And this dropped cooling water is drained into the waste water tank 7 through the drain hose 8. Bubbles 9b of the cooling water are produced on the surface of the waste water 9 on draining the cooling water into the waste water tank 7.
- the waste water 9 drained in the waste water tank 7 contains the cut chips of the lens 4. And the cut chips contained in the waste water 9 are deposited on the bottom of the waste water tank 7.
- the waste water 9 of the cooling water is pumped up from an upper layer thereof through the auction port 10a of the pump 10 and is spouted again as the cooling water through the nozzle 6 onto the part to be ground of the lens 4 by the grindstone 5.
- the lens 4 is a plastic lens
- sulfur molecules contained in the lens 4 produce a sharp offensive smell that assails the nostrils on grinding this plastic lens by the grindstone 5.
- the blower 39 is operated to generate a negative pressure on the suction side of the blower 39 in grinding process.
- the negative pressure affects the space 11 in the waste water tank 7 through the suction box 38, the deodorization device 36, the fine filter 37, the hose 40, the centrifugal separator 23, the suction hose 14, the dehydration filter 13 and the suction hose 12, and affects the grinding chamber 2 of the lens grinding machine through the drain hose 8.
- the bad-smelling air sucked into the suction hose 12 contains inevitably the waste water and the cut chips which are produced in the grinding process, and bubbles produced from the waste water.
- the bad-smelling air sucked into the suction hose 12 is sucked into the suction hose 14 from the outlet opening 17b after being filtered by the filter element 18 of the dehydration filter 13.
- Most part of the bubbles, the cut chips, the mist of the waste water and the like contained in the bad-smelling air is captured by the filter element 18 and stored in a lower part of the cylindrical vessel 16 when filtering the air by the filter element 18.
- the waste water stored in the lower part of the cylindrical vessel 16 is drained from the cylindrical vessel 16 to outside by opening the drain valve 19.
- the bad-smelling air still contains the cut chips, bubbles or the like, they are forced to move radially outward and pressed against the outer tube 28 by centrifugal force, and the cut chips, the bubbles or the like together with the condensation of the waste water drop down into and is stored in the water storage tank 24 which is arranged below through the drain ports (drain passages) 33a.
- the volume detection sensor 35 Upon the increase of the volume of the waste water or the cut chips stored in the water storage tank 24 to the predetermined volume, by detecting that, the volume detection sensor 35 inputs the detection signal to the control circuit (control means) 35a.
- control circuit 35a stops the blower 39 and activates the informing device 35b, such as a buzzer, a light-emitting diode or a liquid crystal display, to inform the operator that the water storage tank 24 is substantially fully filled up with the waste water.
- the informing device 35b such as a buzzer, a light-emitting diode or a liquid crystal display
- the operator opens the door 21, pulls out the water storage tank 24 outside the outer case 20, empties the tank 24 and returns the tank 24 in its place. Then, the control circuit 35a cancels the information of the information device 35b informing the state that the tank 24 is full filled and allows the blower 39 to move.
- the bad-smelling water flowing into the centrifugal separator 23 and removed of the waste water flows through the small gap 32 into a central region of the separator body 26. Then the bad-smelling air flows down through the interior of the inner tube 27 into the storage chamber 25b and flows through the hose 40 into the fine filter 37.
- the fine filter 37 further filters the fine dust and the moisture contained in the bad-smelling air.
- the impregnated activated carbon 36a of the device 36 adsorbs the offensive smell contained in the bad-smelling air.
- the deodorized air is sucked through the suction box 38 into the blower 39 and is discharged through the discharge pipe 39b into the atmosphere.
- the fine filter 37 captures and removes the fine dust (the fine cut chips contained in bubbles 9b floating on the waste water 9 stored in the water storage tank 7) and the moisture, the impregnated activated carbon 36a as the deodorizer is able to maintain a long life time.
- the discharge pipe 39b may be connected to the grinding chamber 2 by a hose to return the filtered and deodorized air into the grinding chamber 2.
- the atmosphere of the room in which the lens-grinding machine 1 is installed will not be contaminated by the offensive smell even if the filtered and deodorized air has a slight offensive smell.
- the dehydration filter 13 may be disposed above the cover plate 7a of the waste water tank 7, the drain valve 19 of the dehydration filter 13 may be connected to an upper part of the waste water tank 7 by a hose and the waste water stored in the dehydration filter 13 may be returned through the drain valve 19 into the waste water tank 7. Furthermore, the waste water stored in the water storage tank 24 may be returned into the waste water tank 7 through a hose by a pump, both are not shown. If the waste water (cooling water) contains a defoaming agent, the defoaming agent can be saved when the stored waste water is thus returned into the waste water tank 7.
- the deodorization apparatus has an outer case 20, and an impact separator 50 installed in a lower part of the interior of the outer case 20.
- the waste water separated from bad-smelling air by the impact separator 50 is stored in the water storage tank 24.
- the impact separator 50 includes a case 51, separation plates 52 and 53 extending from the top wall 51a of the case 51 near to the bottom wall 51b of the same, and the impact separator 50 is able to separate the waste water, the cut chips or the like from the air by making the air colliding with the separation plates 52, 53.
- the suction hose 12 (or the suction hose 14) shown in Fig. 1 is connected to an inlet opening formed in a side wall of the case 51.
- the bad-smelling air having an offensive smell (or having an offensive smell and containing the bubbles, the cut chips and the like) and sucked into the impact separator 50 through the suction hose 12 (or the suction hose 14) impacts the separating plate 52.
- the bad-smelling air impacted the separating plate 52 flows in turbulent currents and the turbulent currents of the bad-smelling air further collides with the separation plate 53. Consequently, components of the waste water stored in the bad-smelling water adhere as waste water drops on the separation plates 52 and 53, and the waste water drops drip onto the bottom wall 51b.
- the bottom wall 51b is provided with a drain hole, not shown, to drain the waste water and the like into the water storage tank 24.
- the separator body 26 of the centrifugal separator 23 shown in Fig. 3 is put on the fine filter 37 with the inner tube 27 of the body 26 directly communicating with the fine filter 37.
- the drain passages 33a are formed in the bottom wall 30.
- the bottom wall 30 is not provided with any drain hole and the annular passage 29 is connected to a water storage tank, not shown, by a discharge hose, not shown.
- the suction hose 12 shown in Fig. 1 is connected to a part of the case 51, and most part of the fine cut chips contained in the bubbles 9b floating on the surface of the waste water 9 stored in the waste water tank 7 is separated from the bad-smelling air by the impact separator 50 or the separator body 26 of the centrifugal separator 23.
- the fine cut chips that could not have been removed by the impact separator 50 nor the separator body 26 of the centrifugal separator 23 are captured and removed together with the moisture from the bad-smelling air by the fine filter 37.
- the life time of the impregnated activated carbon 36a as the deodorizer can be extended by thus capturing and removing the fine dust (the fine cut chips contained in the bubbles 9b floating on the surface of the waste water 9 stored in the waste water tank 7) and the moisture by the fine filter 37.
- the filter 13 When the deodorization system is provided with the dehydration filter 13, the filter 13 may be disposed above the cover plate 7a of the waste water tank 7, the drain valve 19 of the filter 13 may be connected to an upper part of the tank 7 by a hose and the waste water stored in the filter 13 may be returned through the drain valve 19 into the tank 7. Moreover, according to this embodiment, the waste water stored in the water storage tank 24 and that separated by the separator body 26 from the bad-smelling air may be returned through a hose, not shown, into the tank 7 by a pump, not shown. In this case, if the cooling water contains a defoaming agent, the defoaming agent can be saved when the stored waste water is thus returned into the tank 7.
- the deodorization apparatus is not provided with any device corresponding to the separator body 26 of the centrifugal separator 23 included in the deodorization apparatus in the second embodiment, and the hose 40 in the second embodiment is connected to the fine filter 37.
- the deodorization apparatus is not provided with any parts corresponding to the water storage tank 24 and the door 21.
- a drain pipe 54 is connected to the bottom of the case 51 of the impact separator 50, the drain pipe 54 is projected outside from the outer case 20, and a faucet 55 is connected to the free end of the drain pipe 54. The faucet 55 is opened to drain the waste water stored in the bottom of the case 51.
- the suction hose 12 shown in Fig. 1 is connected to a part of the case 51, and the most part of the fine cut chips contained in the bubbles 9b floating on the surface of the waste water 9 stored in the waste water tank 7 is separated from the bad-smelling air by the impact separator 50.
- the fine cut chips that could not have been removed by the impact separator 50 are captured and removed together with moisture from the bad-smelling air by the fine filter 37.
- the life time of the impregnated activated carbon 36 as the deodorizer can be extended by thus capturing and removing fine dust (the fine cut chips contained in the bubbles 9b floating on the surface of the waste water 9 stored in the tank 7) and the moisture by the filter 37.
- the filter 13 When the deodorization system is provided with the dehydration filter 13, the filter 13 may be disposed above the cover plate 7a of the tank 7, and the drain valve 19 of the filter 13 may be connected to an upper part of the tank 7 by a hose. Then the waste water may thereby be returned through the drain valve 19 into the tank 7.
- the waste water stored in the bottom of the impact separator 50 may be returned through a hose, not shown, into the tank 7 by a pump, not shown. In this case, if the cooling water contains a defoaming agent, the defoaming agent can be saved when the stored waste water is thus returned into the tank 7.
- the deodorization apparatus 15 includes parts different in shape and arrangement from those of the deodorization apparatus 15 in the second embodiment. That is, in this embodiment, an elongated blower 39 is set in a vertical position, the suction side of the blower 39 is connected to a suction box 38 by a hose 56.
- the deodorization apparatus 15 in this embodiment is not provided with any parts corresponding to the drain pipe 39b, and a plurality of discharge holes, not shown, are formed in a part of the outer case 20 facing the blower.
- the discharge holes are covered with a discharge filter 57, and the air discharged from the blower 39 is discharged outside after being filtered by the discharge filter 57.
- the deodorization apparatus 15 in this embodiment is provided with a vertically elongated water storage tank 24 and an impact separator 50 having a vertically elongated case 51 provided with a single separating plate 52.
- the impact separator 50 is disposed in an upper part of the deodorization apparatus 15, the deodorization device 36 is disposed beside the separator 50, the water storage tank 24 is disposed below the separator 50, and the blower 39 is disposed beside the tank 24.
- the separator 50 and the tank 24 are disposed in a vertical arrangement, and the deodorization apparatus 15 has a compact construction.
- the deodorization system in the fourth embodiment was used practically.
- the most part of substances stored in the tank 24 was the waste water scarcely containing the bubbles. By colliding the bad-smelling air with the separation plate 52, it can be done to extinguish the most part of the bubbles contained in the air.
- the volume of the waste water stored in the tank 24 after grinding one hundred lenses was about 1.1 liters. If the waste water (cooling water) contains a defoaming agent, the defoaming agent can be saved when the deodorization system, similarly to those in the first to the third embodiments, returns the waste water removed from the bad-smelling air and stored in the dehydration filter 13 and in the tank 24 through a hose, not shown, by a pump, not shown, to the waste water tank 7.
- a deodorization system in a fifth embodiment according to the present invention will be described with reference to Fig. 8.
- a funnel like separator 60 for separating the waste water and the bad- smelling air from each other is disposed between the drain hose 8 in the first embodiment and the cover plate 7a of the waste water tank 7 in the first embodiment.
- the suction hose 12 is connected to this separator 60.
- the separator 60 has a tapered part 61 tapered in a manner such that the diameter of its lower part is smaller than that of its upper part, a cylindrical part 62 connected to the lower end of the tapered part 61, and a top wall 63 covering the open upper end of the tapered part 61.
- the cylindrical part 62 penetrates the cover plate 7a of the tank 7 and is hermetically fixed to the cover plate 7a.
- a lower end part of the drain hose 8 is inserted in a penetrated hole 63a formed in the center of the top wall 63 so as to extend into the cylindrical part 62.
- a small annular gap 64 is formed between the lower end part of the drain hose 8 and the cylindrical part 62.
Description
- The present invention relates to a deodorization system for a lens-grinding machine, as per the preamble of claim 1. An example of such a system is disclosed by DE 44 11 537A.
- It is known that when grinding a high-refraction plastic lens or the like by a conventional lens-grinding machine, the plastic lens produces an offensive smell owing to the effect of sulfur molecules contained in the plastic lens. Various deodorization systems have been developed to solve the problems resulting from such an offensive smell.
- A deodorization apparatus disclosed in JP-U No. Hei 6-61444 deodorizes bad-smelling air having an offensive smell produced when a plastic lens and the like containing components that produce offensive smells at the time of being ground are ground by making a deodorization filter suck the bad-smelling air from a tank for storing a waste water (waste water tank) through a connection pipe provided separately from a drain hose.
- A deodorization apparatus disclosed in JP-A No. Hei 5-345268 guides a bad-smelling gas produced by a lens-grinding machine into a body of deodorization device from an inlet opening disposed near a lens-grinding region on the lens-grinding machine through a flexible tube, and removes the bad-smelling gas by a deodorization filter which is a lamination of a dust filter, a paper filter and activated carbon for deodorization.
- However, when the air having an offensive smell is sucked into the deodorization apparatus, waste water, cut chips and bubbles produced in the waste water are sucked together with the air into the deodorization apparatus.
- Accordingly, there is a problem that the deodorization filter of the deodorization apparatus disclosed in JP-U No. Hei 6-61444 is clogged in a short operating time with highly humid gas, cut chips or the bubbles sucked through the connection pipe and is unable to function effectively.
- The deodorization apparatus disclosed in JP-A No. Hei 5-345268 that sucks the bad-smelling gas by making the gas flow from the inlet opening disposed near the lens-grinding region into the body of the deodorization device through the flexible tube also has a problem that the waste water produced in the grinding process is sucked accidentally to be accumulated in the deodorization apparatus so that the deodorization apparatus is deteriorated and damaged.
- DE 44 11 537 A describes a lens-grinding machine including a cooling medium tank and an air suction device, said air suction device being connected to the cooling medium tank via a dust and deodorization filter using this device there is a risk of the - deodorization filter being clogged.
- Moreover, there is also a problem that a deodorizer is unable to function effectively because the bad-smelling air contains the waste water, the bubbles and the cut chips.
- Besides, problems caused by the offensive smells are not radically solved because the offensive smells cannot be removed from the waste water storage tank.
- Furthermore, the offensive smells cause troubles in the maintenance of the waste water tank storing the waste water produced by the grinding process for grinding the aforementioned high-refraction plastic lens and the like.
- It is an object of the present invention to provide a deodorization system for a lens-grinding machine, which system is able to maintain sufficient deodorizing effect for a long operating time without clogging of its deodorization means by a waste water containing bubbles, cut chips and the like produced in a grinding process.
- The aforementioned object, being achieved by the features of claim 1.
- It is obtained the effect that the deodorization filter will not be clogged with the waste water, the bubbles and the like and hence the deodorization system is able to deodorize the bad-smelling air produced by the grinding process effectively, even if the air containing the waste water, bubbles, cut chips and the like is sucked and deodorized. In addition, since the bad-smelling air is sucked through the waste water tank, offensive smells produced by the grinding machine, as well as those produced in the waste water tank can be deodorized. A clogging of the deodorization means is prevented by the use of a fine filter.
- Additionally there is provided a deodorization system further including a water storage tank for storing the waste water separated from the bad-smelling air by the separation means.
- It is obtained the effect that the water storage tank keeps the components of the deodorization system from being wet with the waste water to prevent the deterioration and damaging of the system.
- Additionally there is provided a deodorization system further including detection means for detecting the volume of the waste water stored in the water storage tank.
- Additionally there is provided a deodorization system in which the detection means is incorporated into the water storage tank.
- Additionally there is provided a deodorization system in which the detection means is incorporated into the separation means.
- In the deodorization systems in the above embodiments of the present invention, it is obtained the effect that the volume of the waste water separated from the bad-smelling air by the separation means can be known without directly examining the water storage tank and hence the overflow of the waste water from the water storage tank can be prevented. Consequently, the deterioration and damaging of the deodorization system can be prevented and the maintenance of the components of the deodorization system can be facilitated.
- According to an optional embodiment of the present invention, there is provided a deodorization system in which the fine filter is interposed between and connected to the separation means and the deodorization means.
- In the deodorization systems according to these embodiments of the present invention, moisture and fine cut chips that could not have been separated from the bad-smelling air by the separation means can be separated and removed from the air. Consequently, it is obtained the effect that the cleanliness of the bad-smelling air supplied to the deodorization means is improved and thereby the life time of activated carbon serving as a deodorizer of the deodorization system can be extended.
- The above and other objects, features and advantages of the present invention will become apparent from the following description taken in connection with the accompanying drawings, in which:
- Fig. 1 is a schematic front elevation of a deodorization system for a lens-grinding machine in a first embodiment according to the present invention;
- Fig. 2 is a schematic front elevation of an internal structure of the deodorization apparatus included in the deodorization system shown in Fig. 1;
- Fig. 3 is a sectional view of a centrifugal separator included in the deodorization apparatus shown in Fig. 2 taken along a plane parallel to the paper substantially centered in the centrifugal separator;
- Fig. 4 is a perspective view of an essential part of a separator body included in the centrifugal separator shown in Fig. 3;
- Fig. 5 is a front elevation of an internal structure of a deodorization apparatus included in a deodorization system for a lens-grinding machine in a second embodiment according to the present invention;
- Fig. 6 is a front elevation of an internal structure of a deodorization apparatus included in a deodorization system for a lens-grinding machine in a third embodiment according to the present invention;
- Fig. 7 is a front elevation of an internal structure of a deodorization apparatus included in a deodorization system for a lens-grinding machine in a fourth embodiment according to the present invention; and
- Fig. 8 is a schematic front elevation of a deodorization system for a lens-grinding machine in a fifth embodiment according to the present invention.
-
- Referring to Fig. 1, reference numeral 1 designates a lens-grinding machine(lens grinder), and numeral 4 designates a lens as an object of grinding. The lens-grinding machine 1 has a grinding chamber 2 enclosing all the components of the lens-grinding machine 1 therein, a
lens rotating shaft 3 disposed in the grinding chamber 2 to hold the lens 4 thereon and to rotate the same, agrindstone 5 for grinding the periphery of the lens 4, having an axis of rotation substantially parallel to the axis of thelens rotating shaft 3, and anozzle 6 for spouting cooling water when grinding the lens 4 with thegrindstone 5. The lens-grinding machine 1 is a well-known one. Only the least components of the lens-grinding machine 1 necessary for the description of the present invention are shown in Fig. 1. - Referring to Fig. 1, a cooling water circulating system A includes a
waste water tank 7 disposed below the lens-grinding machine 1, acover plate 7a covering the open upper end of thewaste water tank 7, and adrain hose 8 for draining cooling water containing cut chips from the bottom of the grinding chamber 2 into thewaste water tank 7.Waste water 9 is stored in thewaste water tank 7. The cooling water circulating system A has a pump 10 fixed to the cover plate (covering member) 7a with itssuction port 10a immersed in an upper part in thewaste water 9. - The pump 10 has a discharge port connected to the
nozzle 6. When grinding a peripheral part of the lens (raw spectacle lens or the like) 4 with thegrindstone 5, thewaste water 9 stored in thewaste water tank 7 is pumped up through a filter, not shown, and is spouted through thenozzle 6 again as cooling water onto a working part of thegrindstone 5 in contact with the lens 4. - Shown also in Fig. 1 are the
upper surface 9a of thewaste water 9,bubbles 9b floating on theupper surface 9a of thewaste water 9, a space 11 between theupper surface 9a of thewaste water 9 and thecovering plate 7a. Thebubbles 9b are formed when the cooling water is drained from the grinding chamber 2 through thedrain hose 8 into thewaste water tank 7. The space 11 is filled up with bad-smelling air having an offensive smell produced when the lens 4 is ground. - One end of a
suction hose 12 which is open to the space 11 is connected thecover plate 7a. Another end of thesuction hose 12 is connected to a dehydration filter (first separation means) 13. A deodorization apparatus (deodorization means) 15 is connected by anothersuction hose 14 to thedehydration filter 13. - The
dehydration filter 13 includes acylindrical vessel 16 having an open upper and, acover 17 covering the open upper end of thecylindrical vessel 16, afilter element 18 attached to thecover 17, and adrain valve 19 attached to the bottom of thecylindrical vessel 16. Thecover 17 is provided with aninlet opening 17a and anoutlet opening 17b. Theinlet opening 17a and theoutlet opening 17b are isolated from each other by thefilter element 18. The end of thesuction hose 12 on the side of thedehydration filter 13 is connected to theinlet opening 17a. The end of thesuction hose 14 on the side of thedehydration filter 13 is connected to theoutlet opening 17b. That is, the bad-smelling air sucked through the inlet opening 17a into thedehydration filter 13 flows necessarily through thefilter element 18 to theoutlet opening 17b. Thecover 17 is removed from thecylindrical vessel 16 to remove thefilter element 18 from thecylindrical vessel 16, which facilitates work for cleaning thefilter element 18 and replacing the same with another one. - The bad-smelling air sucked through the
suction hose 12 and the inlet opening 17a into thedehydration filter 13 is filtered by thefilter element 18. The filtered bad-smelling air is sucked through the outlet opening 17b into thesuction hose 14. When the bad-smelling air passes through thefilter element 18, most part of bubbles, cut chips and mist of waste water is captured by thefilter element 18 and is stored in a lower part of thecylindrical vessel 16. The waste water stored in the lower part of thecylindrical vessel 16 can be drained from thecylindrical vessel 16 by opening thedrain valve 19. - Any other suitable filter may be used instead of the
dehydration filter 13 mentioned in this embodiment, provided that the filter is capable of separating the bubbles, the cut chips and the mist of the waste water from the bad-smelling air. - As shown in Fig. 2, the
deodorization apparatus 15 has anouter case 20 which is longer in the perpendicular direction than it is in the horizontal direction. Theouter case 20 is provided with aside door 21 that opens and shuts in the directions of the arrows B in a lower part of a side wall thereof, and atop door 22 that opens and shuts in the directions of the arrows C in a top wall thereof. A centrifugal separator (second separation means) 23 is disposed in a lower part of the interior of theouter case 20. Awater storage tank 24 is disposed under thecentrifugal separator 23 in theouter case 20. - As shown in Fig. 3, the
centrifugal separator 23 includes amain body 25 having adrawer space 25a in the lower part of themain body 25 and astorage chamber 25b over thedrawer space 25a, and aseparator body 26 disposed in thestorage chamber 25b. Themain body 25 is provided with an opening to which the end of thesuction hose 14 whose another end is connected to the outlet opening 17b of thedehydration filter 13 is connected, and an opening to which ahose 40 is connected. - Referring to Figs. 3 and 4, the
separator body 26 has a double tube constitution of aninner tube 27 and anouter tube 28 which has a diameter greater than that of theinner tube 27 and aconnection hole 28a. And a cylindrical or annular passage (space) 29 is formed as a gas-liquid-separating passage with theinner tube 27 and theouter tube 28. Theseparator body 26 also has anannular bottom wall 30 joined to the lower ends of theinner tube 27 and theouter tube 28, and a disk-shapedcover plate 31 covering the open upper end of theouter tube 28. Asmall gap 32 for air passage is formed between the upper end of theinner tube 27 and thecover plate 31 by constituting the upper end of theinner tube 27 lower than that of theouter tube 28. - The
bottom wall 30 of theseparator body 26 is supported ontubular support members 33 having the shape of a tube and fixed to thebottom wall 25c of themain body 25. Thebottom wall 30 of theseparator body 26 is spaced from thebottom wall 25c of themain body 25 by thetubular support members 33. Therefore, the bad-smelling air is able to flow through a space between thebottom wall 30 of theseparator body 26 and thebottom wall 25c of themain body 25. As shown in Fig. 3,drain passages 33a are formed through thebottom wall 30 of theseparator body 26, thebottom wall 25c of themain body 25 and thetubular support members 33. Water, cut chips produced by grinding operation and the like separated from the bad-smelling air by theseparator body 26 are drained through thedrain passages 33a into thewater storage tank 24 described later. - The
connection hole 28a is formed with its axis extended tangentially to theannular passage 29 in a lower part of theouter tube 28. Theconnection hole 28a is connected by ahose 34 to a connecting opening formed in themain body 25 to which thesuction hose 14 is connected. - The bad-smelling air sucked from the
suction hose 14 flows through thehose 34 tangentially into the annular passage (space) 29 before flowing into thestorage chamber 25b and whirls in theannular passage 29. Moisture, the cut chips and the like having specific gravities greater than that of air are forced to move radially outward and pressed against theouter tube 28 by centrifugal force. The bad-smelling air thus cleared of the moisture and the cut chips flows through thesmall gap 32 into a central region of theseparator body 26. Then the bad-smelling air flows through the space secured between thebottom wall 30 of theseparator body 26 and thebottom wall 25c of themain body 25 by thetubular support members 33 into thestorage chamber 25b as indicated by the arrows in Fig. 3. Finally, the bad-smelling air flows through the other connecting opening formed in themain body 25 into thehose 40. - The
centrifugal separator 23 can separate the waste water which could not have been removed by thedehydration filter 13 from the bad-smelling air. - The waste water and the cut chips drained through the
drain passages 33a is stored in thewater storage tank 24. Thewater storage tank 24 is placed in thedrawer space 25a so as to be slidable to right and left direction in Fig. 2. Thedoor 21 is opened and thewater storage tank 24 can be pulled leftward out of theouter case 20. - A volume detection sensor (detection means) 35 is attached to an upper part of the
water storage tank 24 to detect the increase of the volume of the waste water stored in thewater storage tank 24 to a predetermined volume and the rise of the waste water level to a predetermined level. Thevolume detection sensor 35 may be disposed at a position on the side of thecentrifugal separator 23. Upon the increase of the volume of the waste water stored in thewater storage tank 24 to a predetermined volume, by detecting that, thevolume detection sensor 35 inputs a detection signal to a control circuit (control means) 35a. When receiving the detection signal, thecontrol circuit 35a activates an informingdevice 35b, such as a buzzer, a light-emitting diode or a liquid crystal display, to inform an operator that thewater storage tank 24 has been substantially fully filled up with the waste water, and stops ablower 39 which will be described later. - The
deodorization apparatus 15 includes a deodorization device (deodorization means) 36 placed in theouter case 20 for deodorizing the bad-smelling air, afine filter 37 detachably attached to an upper part of thedeodorization device 36 for removing the moisture and the fine cut chips, asuction box 38 attached to a lower part of thedeodorization device 36 for storing deodorized air temporarily, and theblower 39 disposed between thecentrifugal separator 23 and thesuction box 38 and held on theouter case 20 for making the air containing offensive smells flow. An impregnated activated carbon (a deodorizer as a body of deodorization means) 36a which absorbs the offensive smell is built-in thedeodorization device 36. And the impregnated activatedcarbon 36a can be replaced by removing thefine filter 37. Additional separation and removal of the waste water from the air by thecentrifugal separator 23, which water could not be separated and removed from the air by thedehydration filter 13 can extend the life time of the impregnated activated carbon. - In addition, it can not be used only the impregnated activated
carbon 36a, but also any one of porous alumina ceramics, ceramic balls or photo catalysts using zinc oxide (ZnO), titanium oxide (TiO2) or the like, or mixtures of impregnated activated carbon and some of those materials as the deodorizer. - And the
fine filter 37 is capable of further removing the moisture and the fine cut chips which could not have been removed by thedehydration filter 13 and thecentrifugal separator 23 from the air. Thefine filter 37 can be easily taken out of theouter case 20 by opening thedoor 22 to replace the same with a new one. - The
storage chamber 25b of thecentrifugal separator 23 is connected to thefine filter 37 by thehose 40. Thefine filter 37, thedeodorization device 36 and thesuction box 38 communicate with each other. Furthermore, asuction pipe 39a of theblower 39 is connected to thesuction box 38 and adischarge pipe 39b of theblower 39 is connected to an opening formed in a side wall of theouter case 20. - In the constitution described above, the bad-smelling air discharged from the
centrifugal separator 23 flows into theblower 39 through thehose 40, thefine filter 37, thedeodorization device 36, thesuction box 38 and thesuction pipe 39a, and is discharged to the outside of theouter case 20 through thedischarge pipe 39b. - If the
volume detection sensor 35 inputs the detection signal in case of the increase of the volume of the waste water stored in thewater storage tank 24 to the predetermined volume, thecontrol circuit 35a activates the informingdevice 35b and stops theblower 39. Thus the overflow of the waste water from thewater storage tank 24 can be prevented. - The operation of the deodorization system for a lens-grinding machine will be explained hereinafter.
- Techniques for grinding a peripheral part of the lens 4 by the lens-grinding machine 1 is well-known and hence the description thereof will be omitted. When grinding the lens 4 in a globe type shape with the
grindstone 5 of the lens-grinding machine 1, the pump 10 is operated. The pump 10 pumps up thewaste water 9 through a filter, not shown, and to spout the waste water as cooling water through thenozzle 6 onto a part to be ground of the lens 4 by thegrindstone 5. Consequently, the part of the lens 4 ground by thegrindstone 5 is cooled. - The cooling water used for cooling washes off the cut chips from the lens 4, drops down the same below the lens 4 on cooling the part to be ground of the lens 4 by the
grindstone 5. And this dropped cooling water is drained into thewaste water tank 7 through thedrain hose 8.Bubbles 9b of the cooling water are produced on the surface of thewaste water 9 on draining the cooling water into thewaste water tank 7. - The
waste water 9 drained in thewaste water tank 7 contains the cut chips of the lens 4. And the cut chips contained in thewaste water 9 are deposited on the bottom of thewaste water tank 7. On the other hand, thewaste water 9 of the cooling water is pumped up from an upper layer thereof through theauction port 10a of the pump 10 and is spouted again as the cooling water through thenozzle 6 onto the part to be ground of the lens 4 by thegrindstone 5. - Incidentally, supposing that the lens 4 is a plastic lens, sulfur molecules contained in the lens 4 produce a sharp offensive smell that assails the nostrils on grinding this plastic lens by the
grindstone 5. - Therefore, when the lens 4 is made of a plastic material, the
blower 39 is operated to generate a negative pressure on the suction side of theblower 39 in grinding process. The negative pressure affects the space 11 in thewaste water tank 7 through thesuction box 38, thedeodorization device 36, thefine filter 37, thehose 40, thecentrifugal separator 23, thesuction hose 14, thedehydration filter 13 and thesuction hose 12, and affects the grinding chamber 2 of the lens grinding machine through thedrain hose 8. - Consequently, the bad-smelling air produced in the grinding chamber 2 when grinding the lens 4 is sucked into the
blower 39 through thedrain hose 8, thesuction hose 12, thedehydration filter 13, thesuction hose 14, thecentrifugal separator 23, thehose 40, thefine filter 37, thedeodorization device 36 and thesuction box 38. - The bad-smelling air sucked into the
suction hose 12 contains inevitably the waste water and the cut chips which are produced in the grinding process, and bubbles produced from the waste water. However, the bad-smelling air sucked into thesuction hose 12 is sucked into thesuction hose 14 from theoutlet opening 17b after being filtered by thefilter element 18 of thedehydration filter 13. Most part of the bubbles, the cut chips, the mist of the waste water and the like contained in the bad-smelling air is captured by thefilter element 18 and stored in a lower part of thecylindrical vessel 16 when filtering the air by thefilter element 18. The waste water stored in the lower part of thecylindrical vessel 16 is drained from thecylindrical vessel 16 to outside by opening thedrain valve 19. - When the bad-smelling air from which the most part of the bubbles, the cut chips, the mist of the waste water and the like is removed flows into the
centrifugal separator 23, the bad-smelling air whirls in theannular passage 29. Then the waste water still contained in the bad-smelling air adheres to theinner tube 27 and theouter tube 28 as condensation, the condensed waste water drops down onto thebottom wall 30 and dropped waste water further drops down into and is stored in thewater storage tank 24 which is arranged below through the drain ports (drain passages) 33a. If the bad-smelling air still contains the cut chips, bubbles or the like, they are forced to move radially outward and pressed against theouter tube 28 by centrifugal force, and the cut chips, the bubbles or the like together with the condensation of the waste water drop down into and is stored in thewater storage tank 24 which is arranged below through the drain ports (drain passages) 33a. Upon the increase of the volume of the waste water or the cut chips stored in thewater storage tank 24 to the predetermined volume, by detecting that, thevolume detection sensor 35 inputs the detection signal to the control circuit (control means) 35a. Consequently, thecontrol circuit 35a stops theblower 39 and activates the informingdevice 35b, such as a buzzer, a light-emitting diode or a liquid crystal display, to inform the operator that thewater storage tank 24 is substantially fully filled up with the waste water. - The operator opens the
door 21, pulls out thewater storage tank 24 outside theouter case 20, empties thetank 24 and returns thetank 24 in its place. Then, thecontrol circuit 35a cancels the information of theinformation device 35b informing the state that thetank 24 is full filled and allows theblower 39 to move. - The bad-smelling water flowing into the
centrifugal separator 23 and removed of the waste water flows through thesmall gap 32 into a central region of theseparator body 26. Then the bad-smelling air flows down through the interior of theinner tube 27 into thestorage chamber 25b and flows through thehose 40 into thefine filter 37. Thefine filter 37 further filters the fine dust and the moisture contained in the bad-smelling air. When the bad-smelling air filtered by thefine filter 37 flows into thedeodorization device 36, the impregnated activatedcarbon 36a of thedevice 36 adsorbs the offensive smell contained in the bad-smelling air. Thus, the deodorized air is sucked through thesuction box 38 into theblower 39 and is discharged through thedischarge pipe 39b into the atmosphere. Moreover, since thefine filter 37 captures and removes the fine dust (the fine cut chips contained inbubbles 9b floating on thewaste water 9 stored in the water storage tank 7) and the moisture, the impregnated activatedcarbon 36a as the deodorizer is able to maintain a long life time. - The
discharge pipe 39b may be connected to the grinding chamber 2 by a hose to return the filtered and deodorized air into the grinding chamber 2. When the filtered and deodorized air is returned to the grinding chamber 2, the atmosphere of the room in which the lens-grinding machine 1 is installed will not be contaminated by the offensive smell even if the filtered and deodorized air has a slight offensive smell. - The
dehydration filter 13 may be disposed above thecover plate 7a of thewaste water tank 7, thedrain valve 19 of thedehydration filter 13 may be connected to an upper part of thewaste water tank 7 by a hose and the waste water stored in thedehydration filter 13 may be returned through thedrain valve 19 into thewaste water tank 7. Furthermore, the waste water stored in thewater storage tank 24 may be returned into thewaste water tank 7 through a hose by a pump, both are not shown. If the waste water (cooling water) contains a defoaming agent, the defoaming agent can be saved when the stored waste water is thus returned into thewaste water tank 7. - An internal structure of a deodorization apparatus included in a deodorization system for a lens-grinding machine in a second embodiment according to the present invention will be described with reference to Fig. 5.The deodorization apparatus has an
outer case 20, and animpact separator 50 installed in a lower part of the interior of theouter case 20. The waste water separated from bad-smelling air by theimpact separator 50 is stored in thewater storage tank 24. Theimpact separator 50 includes acase 51,separation plates top wall 51a of thecase 51 near to thebottom wall 51b of the same, and theimpact separator 50 is able to separate the waste water, the cut chips or the like from the air by making the air colliding with theseparation plates case 51. The bad-smelling air having an offensive smell (or having an offensive smell and containing the bubbles, the cut chips and the like) and sucked into theimpact separator 50 through the suction hose 12 (or the suction hose 14) impacts the separatingplate 52. The bad-smelling air impacted the separatingplate 52 flows in turbulent currents and the turbulent currents of the bad-smelling air further collides with theseparation plate 53. Consequently, components of the waste water stored in the bad-smelling water adhere as waste water drops on theseparation plates bottom wall 51b. In this time, if the cut chips and the bubbles are contained in the bad-smelling air, the bubbles and the cut chips adhere to theseparation plates bottom wall 51b is provided with a drain hole, not shown, to drain the waste water and the like into thewater storage tank 24. - The
separator body 26 of thecentrifugal separator 23 shown in Fig. 3 is put on thefine filter 37 with theinner tube 27 of thebody 26 directly communicating with thefine filter 37. In thebody 26 shown in Fig. 3, thedrain passages 33a are formed in thebottom wall 30. In thebody 26 according to the second embodiment, thebottom wall 30 is not provided with any drain hole and theannular passage 29 is connected to a water storage tank, not shown, by a discharge hose, not shown. - When the deodorization system is not provided with a device corresponding to the
dehydration filter 13, thesuction hose 12 shown in Fig. 1 is connected to a part of thecase 51, and most part of the fine cut chips contained in thebubbles 9b floating on the surface of thewaste water 9 stored in thewaste water tank 7 is separated from the bad-smelling air by theimpact separator 50 or theseparator body 26 of thecentrifugal separator 23. The fine cut chips that could not have been removed by theimpact separator 50 nor theseparator body 26 of thecentrifugal separator 23 are captured and removed together with the moisture from the bad-smelling air by thefine filter 37. The life time of the impregnated activatedcarbon 36a as the deodorizer can be extended by thus capturing and removing the fine dust (the fine cut chips contained in thebubbles 9b floating on the surface of thewaste water 9 stored in the waste water tank 7) and the moisture by thefine filter 37. - When the deodorization system is provided with the
dehydration filter 13, thefilter 13 may be disposed above thecover plate 7a of thewaste water tank 7, thedrain valve 19 of thefilter 13 may be connected to an upper part of thetank 7 by a hose and the waste water stored in thefilter 13 may be returned through thedrain valve 19 into thetank 7. Moreover, according to this embodiment, the waste water stored in thewater storage tank 24 and that separated by theseparator body 26 from the bad-smelling air may be returned through a hose, not shown, into thetank 7 by a pump, not shown. In this case, if the cooling water contains a defoaming agent, the defoaming agent can be saved when the stored waste water is thus returned into thetank 7. - An internal structure of a deodorization apparatus included in a deodorization system for a lens-grinding machine in a third embodiment according to the present invention will be described with reference to Fig. 6. As shown in Fig. 6, the deodorization apparatus is not provided with any device corresponding to the
separator body 26 of thecentrifugal separator 23 included in the deodorization apparatus in the second embodiment, and thehose 40 in the second embodiment is connected to thefine filter 37. The deodorization apparatus is not provided with any parts corresponding to thewater storage tank 24 and thedoor 21. As shown in Fig. 6, adrain pipe 54 is connected to the bottom of thecase 51 of theimpact separator 50, thedrain pipe 54 is projected outside from theouter case 20, and afaucet 55 is connected to the free end of thedrain pipe 54. Thefaucet 55 is opened to drain the waste water stored in the bottom of thecase 51. - When the deodorization system is not provided with any device corresponding to the
dehydration filter 13, thesuction hose 12 shown in Fig. 1 is connected to a part of thecase 51, and the most part of the fine cut chips contained in thebubbles 9b floating on the surface of thewaste water 9 stored in thewaste water tank 7 is separated from the bad-smelling air by theimpact separator 50. The fine cut chips that could not have been removed by theimpact separator 50 are captured and removed together with moisture from the bad-smelling air by thefine filter 37. The life time of the impregnated activatedcarbon 36 as the deodorizer, can be extended by thus capturing and removing fine dust (the fine cut chips contained in thebubbles 9b floating on the surface of thewaste water 9 stored in the tank 7) and the moisture by thefilter 37. - When the deodorization system is provided with the
dehydration filter 13, thefilter 13 may be disposed above thecover plate 7a of thetank 7, and thedrain valve 19 of thefilter 13 may be connected to an upper part of thetank 7 by a hose. Then the waste water may thereby be returned through thedrain valve 19 into thetank 7. The waste water stored in the bottom of theimpact separator 50 may be returned through a hose, not shown, into thetank 7 by a pump, not shown. In this case, if the cooling water contains a defoaming agent, the defoaming agent can be saved when the stored waste water is thus returned into thetank 7. - An internal structure of a deodorization apparatus included in a deodorization system for a lens-grinding machine in a fourth embodiment according to the present invention will be described with reference to Fig. 7. As shown in Fig. 7, the
deodorization apparatus 15 includes parts different in shape and arrangement from those of thedeodorization apparatus 15 in the second embodiment. That is, in this embodiment, anelongated blower 39 is set in a vertical position, the suction side of theblower 39 is connected to asuction box 38 by a hose 56. Thedeodorization apparatus 15 in this embodiment is not provided with any parts corresponding to thedrain pipe 39b, and a plurality of discharge holes, not shown, are formed in a part of theouter case 20 facing the blower. The discharge holes are covered with adischarge filter 57, and the air discharged from theblower 39 is discharged outside after being filtered by thedischarge filter 57. - Furthermore, the
deodorization apparatus 15 in this embodiment is provided with a vertically elongatedwater storage tank 24 and animpact separator 50 having a vertically elongatedcase 51 provided with asingle separating plate 52. Theimpact separator 50 is disposed in an upper part of thedeodorization apparatus 15, thedeodorization device 36 is disposed beside theseparator 50, thewater storage tank 24 is disposed below theseparator 50, and theblower 39 is disposed beside thetank 24. - Thus, the
separator 50 and thetank 24 are disposed in a vertical arrangement, and thedeodorization apparatus 15 has a compact construction. - The deodorization system in the fourth embodiment was used practically. The most part of substances stored in the
tank 24 was the waste water scarcely containing the bubbles. By colliding the bad-smelling air with theseparation plate 52, it can be done to extinguish the most part of the bubbles contained in the air. The volume of the waste water stored in thetank 24 after grinding one hundred lenses was about 1.1 liters. If the waste water (cooling water) contains a defoaming agent, the defoaming agent can be saved when the deodorization system, similarly to those in the first to the third embodiments, returns the waste water removed from the bad-smelling air and stored in thedehydration filter 13 and in thetank 24 through a hose, not shown, by a pump, not shown, to thewaste water tank 7. - A deodorization system in a fifth embodiment according to the present invention will be described with reference to Fig. 8. As shown in Fig. 8, a funnel like
separator 60 for separating the waste water and the bad- smelling air from each other is disposed between thedrain hose 8 in the first embodiment and thecover plate 7a of thewaste water tank 7 in the first embodiment. Thesuction hose 12 is connected to thisseparator 60. - The
separator 60 has a taperedpart 61 tapered in a manner such that the diameter of its lower part is smaller than that of its upper part, acylindrical part 62 connected to the lower end of thetapered part 61, and atop wall 63 covering the open upper end of thetapered part 61. And thecylindrical part 62 penetrates thecover plate 7a of thetank 7 and is hermetically fixed to thecover plate 7a. A lower end part of thedrain hose 8 is inserted in a penetrated hole 63a formed in the center of thetop wall 63 so as to extend into thecylindrical part 62. A smallannular gap 64 is formed between the lower end part of thedrain hose 8 and thecylindrical part 62. - When a negative pressure is applied through the
suction hose 12 to a space in thetapered part 61 of theseparator 60 while the cooling water as the waste water is flowing down through thedrain hose 8 into thewaste water tank 7, the bad-smelling air in the grinding chamber 2 and in thetank 7 is separated from the cooling water as the waste water flowing down in thedrain hose 8 and is sucked through thedrain hose 8 and theannular gap 64 into the space in thetapered part 61. Then, the bad-smelling air which is sucked into the space in thetapered part 61 is guided to thedeodorization apparatus 15 after thedehydration filter 13, and is discharged outside after being deodorized in the same way as the first embodiment.
Claims (6)
- A deodorization system for a lens-grinding machine, said deodorization system comprising:a suction hose (12, 14) for sucking bad-smelling air from a grinding chamber (2) and a waste water tank (7) storing waste water drained from the grinding chamber (2) through the waste water tank (7); anda deodorization means (36, 36a) for deodorizing the bad-smelling air, said deodorization means (36, 36a) being connected to the suction hose (12, 14),separation means (18, 23, 50) for separating the waste water, bubbles and cut chips from the bad-smelling air and removing the same, characterized by:said separation means being interposed between the suction hose (12, 14) and the deodorization means (36, 36a); anda fine filter (37) capable of capturing further the cut chips and moisture that are sucked together with the bad-smelling air from the grinding chamber (2) and the waste water tank (7) and not being removed by the separation means.
- The deodorization system according to claim 1, characterized in that it further comprises a water storage tank (24) for storing the waste water separated from the bad-smelling air by the separation means (23, 50).
- The deodorization system according to claim 2, characterized in that it further comprises detection means (35) for detecting the volume of the waste water stored in the water storage tank (24).
- The deodorization system according to claim 3, characterized in that said detection means (35) is incorporated into the water storage tank (24).
- The deodorization system according to claim 3, characterized in that said detection means (35) is incorporated into the separation means (23, 50).
- The deodorization system according to claim 1, characterized in that the fine filter (37) is interposed between and connected to the separation means (23, 50) and the deodorization means (36, 36a).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09807699A JP4364342B2 (en) | 1999-04-05 | 1999-04-05 | Lens grinder deodorization system |
JP9807699 | 1999-04-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1043121A1 EP1043121A1 (en) | 2000-10-11 |
EP1043121B1 true EP1043121B1 (en) | 2004-07-07 |
Family
ID=14210268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20000250110 Expired - Lifetime EP1043121B1 (en) | 1999-04-05 | 2000-04-04 | Deodorization system for lens-grinding machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1043121B1 (en) |
JP (1) | JP4364342B2 (en) |
DE (1) | DE60011954T2 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3990106B2 (en) | 2000-12-27 | 2007-10-10 | 株式会社ニデック | Eyeglass lens processing equipment |
DE60303256T2 (en) * | 2002-03-12 | 2006-09-28 | Kabushiki Kaisha Topcon | Plant for the preparation of grinding fluid |
JP4322464B2 (en) * | 2002-03-28 | 2009-09-02 | 株式会社ニデック | Grinding water tank apparatus and spectacle lens processing apparatus including the same. |
KR20030081789A (en) * | 2002-04-12 | 2003-10-22 | 주식회사 알오환경시스템 | Treatment system for glasses process waste water |
JP4397153B2 (en) * | 2002-08-30 | 2010-01-13 | 株式会社ニデック | Grinding water tank equipment |
JP4541271B2 (en) * | 2005-10-17 | 2010-09-08 | 株式会社トプコン | Deodorization system for eyeglass lens grinding machine |
JP5328195B2 (en) * | 2008-03-26 | 2013-10-30 | 株式会社トプコン | Grinding water treatment method and apparatus for lens grinding apparatus |
JP4728408B2 (en) * | 2009-01-19 | 2011-07-20 | 株式会社トプコン | Deodorizing device for lens grinding machine |
CN106425842A (en) * | 2016-11-28 | 2017-02-22 | 南京慧智灵杰信息技术有限公司 | Single-station polishing chamber |
CN108044479B (en) * | 2017-11-20 | 2019-11-19 | 上海华力微电子有限公司 | Polishing machine platform waste water collection tank |
CN107932337A (en) * | 2017-11-20 | 2018-04-20 | 苏州博来喜电器有限公司 | Dust removal device of cutter |
CN108673344A (en) * | 2018-05-11 | 2018-10-19 | 柏佳佳 | A kind of dust-extraction unit of metal polishing processing |
CN109955150A (en) * | 2019-05-06 | 2019-07-02 | 温州富华安全设备有限公司 | The dry throwing of one kind is wet to remove all-in-one machine |
JP2022033653A (en) * | 2020-08-17 | 2022-03-02 | 株式会社ニデック | Spectacle lens processing information processing program and spectacle lens processing device |
CN114643509B (en) * | 2021-12-09 | 2023-02-14 | 宁波喜尔美厨房用品有限公司 | Pot body frosting device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05345268A (en) * | 1991-11-20 | 1993-12-27 | Seiko Epson Corp | Deodorizing device for automatic lens edger and automatic lens edger |
DE4411537C2 (en) * | 1994-04-02 | 1996-02-08 | Wernicke & Co Gmbh | Spectacle lens edge grinding machine |
-
1999
- 1999-04-05 JP JP09807699A patent/JP4364342B2/en not_active Expired - Fee Related
-
2000
- 2000-04-04 DE DE2000611954 patent/DE60011954T2/en not_active Expired - Fee Related
- 2000-04-04 EP EP20000250110 patent/EP1043121B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1043121A1 (en) | 2000-10-11 |
JP4364342B2 (en) | 2009-11-18 |
JP2000288934A (en) | 2000-10-17 |
DE60011954T2 (en) | 2005-08-04 |
DE60011954D1 (en) | 2004-08-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1043121B1 (en) | Deodorization system for lens-grinding machine | |
KR100377016B1 (en) | Upright type Vacuum Cleaner | |
RU2249425C2 (en) | Vacuum cleaner for wet and dry cleaning | |
US5417848A (en) | Coalescence separator with changeable coalescence element | |
KR20040075574A (en) | Cyclone dust collecting apparatus for Vacuum Cleaner | |
AU2004202211B2 (en) | Dust Collecting Apparatus for a Vacuum Cleaner having Two Cyclone Chambers | |
KR102000611B1 (en) | Vacuum cleaner | |
JP2012503522A (en) | Water separator | |
EP1894671B1 (en) | Apparatus of treating grinding water for processing periphery of eyeglass lens | |
JPH11267434A (en) | Vacuum filter | |
JPH05184809A (en) | Device for separating contamination in water | |
KR100800655B1 (en) | Vacuum cleaner with dry filter and water filter | |
KR100547286B1 (en) | Water Wash Vacuum Cleaner | |
JP4094116B2 (en) | Method and apparatus for removing grinding bubbles from a ball grinder | |
EP2200730B1 (en) | Air filter device | |
KR20180131853A (en) | Vacuum liquid recovery and drainage of cutting oil suction cleaner | |
EP1062901B1 (en) | Liquid bath vacuum cleaner | |
JPH11320407A (en) | Filtration device for automatic lens edger and grinding chip removal device | |
KR100691256B1 (en) | A portable multi functional cleaner for liquid storing tanks | |
KR20080086190A (en) | Built-in air cleaner | |
JP2001038623A (en) | Lens grinding attachment | |
JP4438673B2 (en) | Filtration water supply device | |
JPH08247035A (en) | Air compressor | |
KR200343679Y1 (en) | Vacuum Cleaner having Dust Filtering Equipment | |
KR200305523Y1 (en) | Water Wash Vacuum Cleaner |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT NL |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 20001222 |
|
AKX | Designation fees paid |
Free format text: DE FR GB IT NL |
|
17Q | First examination report despatched |
Effective date: 20030114 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT NL |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REF | Corresponds to: |
Ref document number: 60011954 Country of ref document: DE Date of ref document: 20040812 Kind code of ref document: P |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20050408 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20090427 Year of fee payment: 10 Ref country code: DE Payment date: 20090402 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20090401 Year of fee payment: 10 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: V1 Effective date: 20101101 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20100404 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101101 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101103 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100404 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20160418 Year of fee payment: 17 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 18 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 19 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170404 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20180315 Year of fee payment: 19 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190430 |