Grinding water treatment equipment for eyeglass lens processing

Abstract

To provide a grinding water processing device for processing of spectacle lens which can properly process grinding water and processed waste in an efficient manner.SOLUTION: A grinding water processing device for processing of spectacle lens includes: a centrifugal separator which has a dewatering bin, into which grinding water used in a spectacle lens processing device is introduced, and separates the grinding water into water and processed waste by rotation of the dewatering bin; scraping means which scrapes the processed waste deposited on a side wall of the interior of the dewatering bin; an opening provided at the dewatering bin to discharge the processed waste scraped by the scraping means to the outside of the dewatering bin; and a filter which is provided at an exterior area of the opening, causes the water separated from the processed waste by the rotation of the dewatering bin to pass therethrough, and keeps the processed waste in the dewatering bin.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a grinding water treatment device for eyeglass lens processing that separates and treats processing debris from grinding water discharged from an eyeglass lens processing device. [Background technology]

[0002] Known grinding water treatment devices for eyeglass lens processing use a centrifuge to separate and treat water from processing debris (see Patent Documents 1 and 2). In the centrifuge of Patent Document 1, the water is separated by the rotation of the dehydration tank, which flicks the water out of an opening in the top of the dehydration tank. In the centrifuge of Patent Document 2, a conical filter is supported on a support frame inside the rotating dehydration tank, and the water is filtered and separated out by the filter, which rotates together with the dehydration tank. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-283236 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-153134 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the centrifuges of Patent Documents 1 and 2, an operator must frequently remove the processing debris accumulated inside the dewatering tank, which is both time-consuming and inefficient.

[0005] In view of the above-described conventional techniques, an object of the present disclosure is to provide a grinding water treatment device for eyeglass lens processing that can efficiently and appropriately treat grinding water and processing chips. [Means for solving the problem]

[0006] The grinding water treatment device for eyeglass lens processing according to the present disclosure has a dehydration tank into which grinding water used in an eyeglass lens processing device is introduced, and is equipped with a centrifuge that separates the grinding water into water and processing chips by rotation of the dehydration tank, scraping means that scrapes out processing chips accumulated on the side wall inside the dehydration tank, an opening provided in the dehydration tank for discharging the processing chips scraped out by the scraping means to the outside of the dehydration tank, and a filter provided in an area outside the opening that passes water separated from the processing chips by rotation of the dehydration tank and causes the processing chips to remain inside the dehydration tank, The opening is formed in the bottom of the dewatering tub so that the scraps scraped out by the scraping means and dropped therethrough can pass through, and the filter is provided in the bottom of the dewatering tub in an area outside the opening. It is characterized by: [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram showing a schematic configuration of the entire eyeglass lens processing apparatus according to the present embodiment. [Figure 2] FIG. 2 is a schematic cross-sectional view for explaining the configuration of a centrifugal separator and a water receiving portion. [Figure 3] FIG. 2 is a perspective view illustrating the configuration of a bottom plate. [Figure 4] 10A and 10B are diagrams showing examples of the direction of a drain outlet of a grinding water introduction pipe. [Figure 5] FIG. 10 is a diagram illustrating the driving of the scraper. [Figure 6] FIG. 2 is a block diagram showing a control system in the present embodiment. [Figure 7] FIG. 10 is a diagram illustrating the positional relationship between processing waste and water when centrifugal separation is performed. [Figure 8] FIG. 10 is a diagram illustrating the configuration of a grinding water treatment apparatus according to a second embodiment. [Figure 9] 10A and 10B are diagrams illustrating the configuration of a grinding water receiving portion. DETAILED DESCRIPTION OF THE INVENTION

[0008] [overview] An embodiment of a grinding water treatment device for eyeglass lens processing according to the present disclosure will be described. The items grouped in < > below can be used independently or in conjunction with each other.

[0009] The grinding water treatment device exemplified in the present disclosure (e.g., grinding water treatment device 200) includes a centrifuge (e.g., centrifuges 210 and 210B). For example, the centrifuge includes a dehydration tank (e.g., dehydration tank 211 and 211B). For example, used grinding water is introduced into the dehydration tank from the eyeglass lens processing device (e.g., the processing device main body 1). For example, the centrifuge separates the grinding water into water and processing chips by rotating the dehydration tank. For example, the centrifuge includes scraping means (e.g., scraping mechanism unit 600 and 600B). For example, the centrifuge may include grinding water introduction means (e.g., grinding water introduction pipe 150, grinding water introduction unit 150B). For example, the centrifuge may include a cleaning water injection unit (e.g., cleaning water injection unit 550) that sprays cleaning water.

[0010] For example, the grinding water treatment device may be provided with a water receiving section (e.g., water receiving section 500) that receives water separated by the rotation of the spin-drying tank and discharged from the spin-drying tank. For example, the grinding water treatment device may be provided with a grinding water tank (e.g., tank 81) that stores the grinding water to be supplied to the eyeglass lens processing device. For example, the grinding water tank discharges water separated from the processing chips by a centrifuge, so that the grinding water is repeatedly used by the eyeglass lens processing device. For example, the grinding water treatment device may be provided with an informing means (e.g., monitor 12).

[0011] <Scraping method> The scraping means is configured to scrape out chips accumulated inside the spin-drying tub. For example, the scraping means includes a scraper (e.g., scraper 601) that is a member for scraping out chips accumulated on the side wall of the spin-drying tub. For example, the scraper is disposed inside the spin-drying tub. For example, the scraper has a shape that allows it to scrape out chips accumulated on the side wall of the spin-drying tub. For example, the scraper has a cutting edge (e.g., cutting edge 601a) shaped to fit the side wall of the spin-drying tub. For example, the scraping means includes a moving mechanism (e.g., moving mechanisms 602, 602B) that moves the scraper between a retracted position and an operating position for scraping out chips.

[0012] <Dehydration tank> For example, the dewatering tub has a substantially cylindrical sidewall (e.g., sidewalls 211a and 211Ba). The sidewall of the dewatering tub may be conical, with the diameter of the lower part being larger than that of the upper part. Of course, the shape of the dewatering tub is not limited to these shapes. For example, the shape of the dewatering tub may be any shape that allows the grinding water to be separated into chips and water by the rotation of the dewatering tub.

[0013] For example, the rotation shaft of the dehydration tub may be rotatably held by a holding member (e.g., holding member 216) provided on a support mechanism (e.g., support mechanism 201) located above the dehydration tub. The lower part of the rotation shaft (e.g., rotation shaft 215) may be fixed to the bottom of the dehydration tub (e.g., bottom plate 212). Rotation of the rotation shaft rotates the dehydration tub.

[0014] For example, the rotation shaft of the spin tub may be rotatably held by a holding member (e.g., holding member 216B) provided on a support mechanism (e.g., base 206B) located below the spin tub. A connecting member (e.g., connecting member 162B) may be provided to connect the rotation shaft to the upper part of the spin tub (e.g., upper wall 211Bb, second side wall 211BaB).

[0015] For example, an upper wall (e.g., upper wall 211b) may be provided on the top of the spin tub. For example, the upper wall may be formed in an annular shape. For example, if the rotation shaft of the spin tub extending from the top of the spin tub, the moving shaft of the scraping means, and the grinding water inlet pipe are arranged inside the annular shape of the upper wall, the spin tub will rotate without interfering with these. For example, the upper wall may be formed by extending horizontally from the upper end of the side wall of the spin tub. Of course, the shape of the upper wall is not limited to this. For example, the upper wall may be inclined so that the side of the rotation center of the spin tub is higher than the upper part of the side wall. Also, the upper wall may not necessarily be provided. For example, the upper part of the side wall may be inclined toward the rotation center, and the side wall may also serve as the upper wall, so that an area for accumulation of machining chips is secured by the bottom and side wall of the spin tub.

[0016] For example, an opening (e.g., opening 230) is provided in the dehydration tub. For example, the opening is provided to discharge the chips scraped out by the scraping means out of the dehydration tub. For example, the opening is formed in the bottom of the dehydration tub so that the chips scraped out by the scraping means and dropped can pass through. By forming this opening in the bottom of the dehydration tub, the chips scraped out by the scraping means and allowed to fall naturally can pass through the opening and be discharged out of the dehydration tub. This allows the chips accumulated in the dehydration tub to be efficiently and appropriately disposed of. Note that, for example, if the opening is provided in the bottom of the dehydration tub, a chip receiver (e.g., chip receiver 400) may be provided below the opening. Note that the opening may also be provided in the upper part of the dehydration tub.

[0017] For example, a grinding water treatment device is provided with a filter (e.g., filter 200). For example, the filter is provided in the dehydration tank. The filter passes water separated from the machining chips by the rotation of the dehydration tank, causing the machining chips to accumulate (be present) inside the dehydration tank. For example, the filter can be arranged in various positions. For example, the filter is provided in the outer region of the opening for discharging the machining chips (the region outside the opening). For example, the filter may be provided in a position outside the opening where the machining chips can be accumulated inside the dehydration tank. For example, the filter is provided at the bottom of the dehydration tank. The filter may also be provided at the top of the dehydration tank. For example, the filter may be provided between the opening for discharging the machining chips and the side wall of the dehydration tank. For example, the filter may be mesh-shaped.

[0018] In the present disclosure, for example, by providing a filter in an outer region of the opening for discharging processing debris, water centrifuged inside the spin-drying tub passes through the filter and exits the spin-drying tub, preventing water from escaping from the opening. This prevents water from mixing with the processing debris discharged from the opening by the scraping means, allowing the processing debris to be disposed of efficiently and appropriately.

[0019] In addition, when the grinding water contains chips that are lighter than water, the water separated by centrifugation is located on the side wall of the dewatering tank. In this case, the centrifuged water is also discharged outside the dewatering tank through the filter, and the chips are piled up inside the dewatering tank. This allows the chips piled up inside the dewatering tank to be efficiently dewatered and properly disposed of.

[0020] Furthermore, for example, by providing a filter outside the opening and at the bottom of the spin tub, even if the spin tub stops rotating before the processing debris is sufficiently dehydrated, the water remaining inside the spin tub passes through the filter and is discharged. This further prevents water from leaking out of the opening at the bottom of the spin tub, allowing the processing debris to be properly disposed of.

[0021] In the case where an opening for discharging chips from the dehydration tank is provided in the upper part of the dehydration tank and a filter is provided in the bottom part of the dehydration tank, the filter only needs to be provided in the outer region of the opening. In this case, the filter may be provided over the entire bottom part of the dehydration tank.

[0022] Furthermore, the filter is provided to deposit processing debris in the dehydration tub and drain water out of the dehydration tub, and as long as it fulfills this function, its location is not limited to the dehydration tub. For example, the filter may be located between the water receiving section (described later) and the dehydration tub. Of course, the filter may also be located above the water receiving section. In this case, a seal may be provided to prevent water and processing debris from leaking out from between the filter and the dehydration tub.

[0023] <Means for introducing grinding water> For example, the grinding water introduction means introduces grinding water from the eyeglass lens processing machine into the dehydration tank. For example, the grinding water introduction means is configured with a flow path for introducing grinding water into the dehydration tank. For example, the grinding water introduction means is provided so as to discharge the grinding water toward the side wall of the dehydration tank. This prevents the grinding water discharged from the grinding water introduction means from directly entering the opening for discharging the processing debris. Furthermore, because the grinding water flows toward the side wall, the grinding water is more susceptible to the action of centrifugal separation, and the centrifugation of the processing debris and water is more efficient.

[0024] In addition, the grinding water introduction means of the present disclosure "discharging grinding water toward the side wall of the dewatering tank" includes discharging grinding water toward the side wall of the dewatering tank, and the discharged grinding water does not necessarily hit the side wall.

[0025] For example, in a case where the upper wall extending from the side wall of the spin tub is inclined so that the side closest to the rotation center of the spin tub is higher than the upper part of the side wall, the grinding water may be discharged to the side wall side of the spin tub and hit the upper wall. This increases the time it takes for the grinding water to flow down the side wall of the spin tub and reach the filter, increasing the time it is subjected to centrifugal force due to the rotation of the spin tub, resulting in more efficient separation of water and machining chips from the grinding water.

[0026] For example, the grinding water introduction means includes a grinding water introduction pipe for introducing grinding water into the dewatering tank. For example, the outlet of the grinding water introduction pipe is located closer to the side wall of the dewatering tank than the opening provided in the dewatering tank. This further prevents grinding water from entering the opening for passing through the chips.

[0027] For example, the grinding water inlet pipe extends from the top of the dewatering tank to the inside, and the grinding water falls by gravity. The outlet of the grinding water inlet pipe is preferably oriented toward the side wall of the dewatering tank so that the grinding water is discharged toward the side wall of the dewatering tank. This allows the grinding water to be discharged toward the side wall of the dewatering tank by utilizing the force of the natural fall of the grinding water without using a pump.

[0028] The cross-sectional area of ​​the outlet of the grinding water inlet pipe may be smaller than the cross-sectional area of ​​the inlet of the grinding water inlet pipe. This increases the force of the grinding water that exits the outlet and heads toward the side wall of the dewatering tank, making it difficult for the grinding water to flow into the opening through which the chips pass, and allowing for efficient centrifugal separation by the rotation of the dewatering tank. This also contributes to the miniaturization of the dewatering tank.

[0029] Furthermore, the direction of the outlet of the grinding water inlet pipe may be oriented so that the grinding water is discharged along the rotation direction of the spin-drying tub, rather than in the normal direction of the side wall of the spin-drying tub. This prevents the grinding water from bouncing off and splashing when it collides with the side wall of the rotating spin-drying tub, accumulated chips, or grinding water pooled on the side wall. As a result, it is possible to further prevent the grinding water from entering the chip discharge opening.

[0030] In the example of the present disclosure, an opening for discharging chips is provided at the bottom of the spin-drying tank, which causes a new problem in which grinding water introduced from the grinding water inlet pipe enters the opening. To alleviate this problem, the present disclosure devised the above-described arrangement of the grinding water inlet pipe inside the spin-drying tank.

[0031] Furthermore, for example, the grinding water introducing means may have a grinding water receiving portion (e.g., grinding water receiving portion 153B). Grinding water discharged from the eyeglass lens processing apparatus is introduced (introduced) into the grinding water receiving portion. For example, the grinding water receiving portion is disposed inside the spin-drying tank. For example, the grinding water introducing means may include a rotation means (e.g., rotation unit 217B) that rotates the grinding water receiving portion in the same direction as the rotation direction of the spin-drying tank. Furthermore, the grinding water receiving portion may rotate integrally with the spin-drying tank. The outer periphery of the grinding water receiving portion may be provided with a discharge opening (e.g., discharge opening 160B) that discharges the grinding water toward the side wall of the spin-drying tank. In this case, when the grinding water receiving portion is rotated in the same direction as the rotation direction of the spin-drying tank, centrifugal force acts on the grinding water received in the grinding water receiving portion, causing the grinding water to be forcefully discharged (released) from the outer periphery of the discharge opening, and at the same time, a force in the rotation direction acts on the grinding water exiting from the discharge opening. This reduces the generation of splashes when the grinding water collides with the side wall of the spin-drying tank (or the wall of grinding water accumulated on the side wall), which is rotating at high speed. It also reduces the interference with the centrifugal separation of the water and the processed waste due to the grinding water accumulated on the side wall, allowing for efficient centrifugal separation of the processed waste and water.

[0032] For example, the rotating means of the grinding water receiving section may be shared with the rotating means of the spin tub (e.g., rotation unit 217B) so as to rotate integrally with the spin tub. The grinding water receiving section may also be attached to the rotating shaft of the spin tub (e.g., rotating shaft 215B). The grinding water receiving section may have a bottomed water receiving plate (e.g., water receiving plate 155B) that receives grinding water discharged from the eyeglass lens processing apparatus, and a plurality of connecting members (e.g., connecting members 162B) for connecting the water receiving plate to the spin tub. In this case, the discharge opening may be formed between the plurality of connecting members. The connecting member may also be formed integrally with the spin tub and the grinding water receiving section.

[0033] For example, when the grinding water introduction means has a grinding water receiving portion, the dewatering tub may have a two-tiered structure having a first lower sidewall (e.g., first sidewall 211BaA) and a second sidewall (e.g., second sidewall 211BaB) provided above the first sidewall. For example, the first sidewall may have a cylindrical surface or a conical surface with a smaller diameter at the top than at the bottom, and the second sidewall may have a conical surface with a smaller diameter at the top than at the bottom, and the angle formed by the conical surface of the second sidewall with respect to the vertical direction may be larger than the angle formed by the cylindrical or conical surface of the first sidewall with respect to the vertical direction. In this case, the discharge opening may be located above the first sidewall. For example, the discharge opening may be located between the heights of the conical surfaces of the second sidewall.

[0034] <Water receiving section> For example, the water receiving section has an area for receiving water that has passed through the filter of the dehydration tank. For example, the water receiving section is disposed below the filter. For example, the water receiving section has a drainage outlet (e.g., drainage outlet 501) for storing the water that has passed through the filter and discharging the water to a tank (e.g., tank 81) that stores grinding water. For example, the water receiving section only needs to be disposed outside the area where the chips scraped out by the scraping mechanism pass through the opening. For example, the water receiving section is disposed outside the opening through which the chips pass.

[0035] <Cleaning water injection section> For example, the cleaning water spraying unit has a nozzle (for example, nozzle 553) that sprays cleaning water toward the filter of the dehydration tank. For example, the cleaning water spraying unit is driven after the scraping means has scraped out the machining chips from the dehydration tank. This eliminates clogging of the filter and allows the grinding water to be disposed of effectively.

[0036] For example, the cleaning water jetting unit may be provided with a tank for storing cleaning water, separate from the tank for storing grinding water. In this case, the cleaning water in the tank is pumped up by driving a pump, and the cleaning water is jetted from the nozzle.

[0037] For example, the nozzle may be positioned to spray cleaning water from below the filter. In this case, the nozzle tip may be positioned to avoid the position where water that has passed through the filter falls and to spray cleaning water from an obliquely downward direction relative to the filter. This prevents water that has passed through the filter from directly entering the nozzle tip when cleaning water is not being sprayed, thereby preventing the nozzle from being clogged by fine processing debris that has passed through the filter. Note that the mechanism for preventing nozzle clogging is not limited to this. For example, the nozzle may be positioned in a retracted position where it is not affected by water that has passed through the filter when not being washed, and may be provided with a mechanism for moving the nozzle from the retracted position to a spraying position where it can spray cleaning water toward the filter when washing. Alternatively, the nozzle may be positioned inside the spin tub. In this case, the nozzle sprays cleaning water from above the filter.

[0038] <Layout of each mechanism relative to the spin tub> For example, the holder for the rotating shaft that rotates the spin tub and the rotation transmission mechanism may be located above the spin tub, and the movement mechanism that moves the scraper of the scraping means may also be located above the spin tub. Furthermore, the grinding water inlet pipe may also be inserted from above the spin tub. In other words, in this case, these components are not located below the opening provided in the bottom of the spin tub. Therefore, these components do not hinder the discharge of machining chips, allowing for efficient disposal of machining chips.

[0039] Of course, the locations of the rotating shaft holder and rotation transmission mechanism are not limited to this, and they may be located below the spin tub. The moving mechanism for moving the scraper may be located inside or below the spin tub. In this case, a connecting member for connecting the spin tub can be provided above the rotating shaft of the spin tub. This prevents the cutting waste that falls when the scraper of the scraping means is operated from accumulating on the connecting member for connecting the spin tub, making it easier to dispose of the cutting waste.

[0040] <Notification means> For example, the notification means is provided to notify the worker of various information. For example, the notification means notifies the worker of errors in the grinding water treatment device, work information required for the worker, etc. For example, the notification means may also be a monitor (e.g., monitor 12), which is an example of a display means provided in the eyeglass lens processing apparatus. In this way, even if the centrifuge is housed inside the table, the display means, which is an example of a notification means provided in the eyeglass lens processing apparatus, can be used to notify the worker of necessary information. For example, the notification means is provided to notify the worker when the centrifuge is not operating normally. In this way, the worker is required to take action when the centrifuge is not operating normally, thereby enabling the processing waste to be disposed of properly.

[0041] [Example] (First Example) Embodiments of the present disclosure will be described with reference to the drawings. Fig. 1 is a diagram showing a schematic configuration of the entire eyeglass lens processing apparatus according to the first embodiment. The eyeglass lens processing apparatus includes a processing apparatus main body 1 and a grinding water treatment device 200. For example, the processing apparatus main body 1 is placed on a table 20, and the grinding water treatment device 200 is arranged below the table 20.

[0042] <Processing equipment body> A processing mechanism unit 10 is disposed inside the housing of the processing device main body 1. The processing mechanism unit 10 is generally composed of lens chuck shafts (lens rotation shafts) 2R, 2L, a carriage unit 3, a grinding wheel 5, which is an example of a processing tool, and the like. The lens chuck shafts (lens rotation shafts) 2R, 2L hold and rotate eyeglass lenses LE. The carriage unit 3 moves the lens chuck shafts 2R, 2L relative to the grinding wheel 5. The grinding wheel 5 is attached to a rotation shaft 6 and rotated by the rotation shaft 6. A lens refractive surface shape measuring unit 8 is also disposed inside the processing device main body 1. The lens refractive surface shape measuring unit 8 measures the shape of the refractive surface (front and rear surfaces) of the lens LE held by the lens chuck shafts 2R, 2L. The configurations of the processing mechanism unit 10 and the lens refractive surface shape measuring unit 8 are described, for example, in JP 2014-4677 A, and detailed description thereof will be omitted.

[0043] During peripheral processing of the lens LE, grinding water is sprayed from a nozzle 11 onto the lens LE and the grinding portion of the grinding wheel 5, thereby cooling the grinding portion of the grinding wheel 5. Furthermore, processing chips generated during processing are washed away by the grinding water to the bottom of the processing chamber 9. A drainage hose 15 is connected to the bottom of the processing chamber 9, through which the grinding water containing the processing chips is discharged.

[0044] <Grinding water treatment equipment> The grinding water treatment device 200 is equipped with a centrifuge 210 that separates the grinding water discharged from the processing device main body 1 into water and machining chips. The centrifuge 210 is equipped with a scraping mechanism 600 that scrapes out the debris accumulated inside the spin-drying tank 211 (see FIG. 2) of the centrifuge 210. The grinding water treatment device 200 also has a water receiving unit 500 that receives the water separated and discharged by the centrifuge 210. Note that the water separated from the machining chips by the rotation of the spin-drying tank 211 may not always be completely separated from the machining chips.

[0045] The grinding water treatment device 200 may be provided with a cleaning water spraying unit 550 that sprays cleaning water to clean the filter 220 (see FIG. 2) provided in the centrifuge 210. The grinding water treatment device 200 may also be provided with a pump tank unit 80 that stores grinding water to be supplied to the processing device main body 1. A chip receiving unit (bucket) 400 is removably disposed at the bottom of the centrifuge 210 to receive the processing chips separated and discharged by centrifugation.

[0046] <Pump tank section> The pump tank section 80 includes a tank 81 that stores grinding water, and a pump 83 that pumps up the grinding water stored in the tank 81. Water is poured into the tank 81 from the water receiving section 500, and the water separated by the centrifuge 210 is reused as grinding water. In this embodiment, the pump tank section 80 is of a circulation type that reuses the grinding water. The grinding water pumped up by the pump 83 is led to the nozzle 11 of the processing device main body 1 by a hose 85.

[0047] <Centrifuge> The configuration of the centrifugal separator 210 will be described with reference to Figures 2 to 5. Figure 2 is a schematic cross-sectional view for explaining the configuration of the water receiving section 500 in addition to the centrifugal separator 210.

[0048] The centrifuge 210 includes a spin-drying tank 211 into which used grinding water is introduced from the processing apparatus main body 1. The spin-drying tank 211 is rotatably supported by a support mechanism 201. For example, the support mechanism 201 includes four support columns 203, and a top plate 205 is fixed to the four support columns 203. The spin-drying tank 211 is disposed below the top plate 205. A holding member 216 that rotatably holds a rotation shaft 215 of the spin-drying tank 211 is fixed to the top plate 205. The rotation shaft 215 is rotated by a drive source disposed above the spin-drying tank 211. For example, the rotation shaft 215 is rotated by a motor 225 disposed on the top plate 205 via a rotation transmission mechanism 227. The rotation transmission mechanism 227 may include a mechanism such as a belt, a pulley, or a gear.

[0049] For example, dehydration tub 211 has a substantially cylindrical sidewall 211a. In this embodiment, sidewall 211a is conical, with a larger diameter at the bottom than at the top. Top wall 211b of dehydration tub 211 has an annular shape and is integrally connected to sidewall 211a. Holding member 216 is disposed through an opening inside annular top wall 211b.

[0050] Bottom plate 212 is attached to the bottom of side wall 211a of dehydration tub 211. Bottom plate 212 forms the bottom of dehydration tub 211. Bottom plate 212 may be attached to side wall 211a in a detachable manner.

[0051] FIG. 3 is a perspective view illustrating the configuration of the bottom plate 212. A rotating shaft 215 is fixed to a center portion 212a of the bottom plate 212. For example, the lower end of the rotating shaft 215 is fixed to the center portion 212a. The bottom plate 212 is provided with an opening 230 through which chips scraped out by the scraping mechanism 600 pass and are discharged to the outside of the spin-drying tank 211. In this embodiment, four connecting portions 212c are formed to connect the peripheral portion 212b of the bottom plate 212 to the center portion 212a, and four openings 230 are provided between these connecting portions 212c. Of course, the number of connecting portions 212c and the number of openings 230 are merely examples and are not limited thereto. For example, the connecting portions 212c extend in a cross shape. The peripheral portion 212b, in cooperation with the side wall 211a and the upper wall 211b, forms an area where chips accumulate. With this configuration, rotation of rotating shaft 215 by motor 225 also rotates spin tub 211. Note that connecting portion 212c does not have to be integral with peripheral portion 212b and central portion 212a, and may be a separate connecting member for connecting a member of peripheral portion 212b and a member of central portion 212a so as to form opening 230.

[0052] A filter 220 is provided in peripheral portion 212b, which is the outer region of opening 230, for passing water separated from the processing debris by the rotation of spin-drying tank 211 and discharging the water outside spin-drying tank 211. That is, filter 220 is provided between opening 230 for discharging processing debris and side wall 211a of spin-drying tank 211. In this embodiment, four elongated holes 212d are formed in peripheral portion 212b, and a filter 220 is attached to each hole 212d. Filter 220 may be attached to bottom plate 212 in a removably manner.

[0053] For example, the filter 220 used may be a mesh-like (net-like) reusable filter, but is not limited thereto. The filter 220 may be made of nonwoven fabric or other materials. For example, the filter 220 may be made of metal. For example, the filter 220 may be made of synthetic fiber. For example, if the filter 220 has a mesh shape, processing debris adhering to the filter 220 can be efficiently cleaned. In this case, the filter 220 is cleaned, for example, by a cleaning water spraying unit 550 described below. For example, the mesh size of the filter 220 may be determined depending on the size of the processing debris that does not pass through the filter 220 and is to be deposited inside the dehydration tank 211. Note that by arranging the filter 220 so that its area extends to the side wall 211a of the dehydration tank 211, water near the side wall 211a passes through the filter 220. This allows the processing debris deposited in the dehydration tank 211 to be efficiently dehydrated.

[0054] <Grinding water introduction unit> A grinding water inlet pipe 150 for introducing grinding water from the processing apparatus main body 1 into the dewatering tank 211 passes through an opening in the upper wall 211b of the dewatering tank 211. That is, the grinding water inlet pipe 150 extends from the top of the dewatering tank 211 to the interior. An inlet 150a of the grinding water inlet pipe 150 is disposed on the top plate 205, and a drain hose 15 extending from the processing apparatus main body 1 is connected to the inlet 150a. An inner pipe 150b of the grinding water inlet pipe 150 inserted into the dewatering tank 211 is thinner than the inlet 150a. Furthermore, a tip pipe 150c extending further from the inner pipe 150b is bent toward the side wall 211a so as to discharge the grinding water toward the side wall 211a. That is, an outlet 151 of the grinding water inlet pipe 150 is oriented toward the side wall 211a so that the grinding water falling due to gravity flows toward the side wall 211a. As a result, the grinding water is directed toward the side wall 211a of the dewatering tank 211 by utilizing the momentum of the natural fall of the grinding water without using a pump. Also, the grinding water discharged from the grinding water inlet pipe 150 is prevented from directly entering the opening 230 for discharging machining chips. Also, the cross-sectional area of ​​the outlet 151 is smaller than the cross-sectional area of ​​the inlet 150a, so that the momentum of the grinding water emitted from the outlet 151 and directed toward the side wall 211a is increased, making it difficult for the grinding water to flow into the opening 230 for discharging machining chips, and allowing efficient centrifugation by the rotation of the dewatering tank 211. Of course, a pump may be provided to impart momentum to the grinding water discharged from the outlet 151.

[0055] Furthermore, it is preferable that the discharge port 151 is disposed closer to the sidewall 211a than the opening 230 for discharging machining waste. This further prevents the grinding water from entering the opening 230.

[0056] 4, the direction of the discharge port 151 may be oriented so that the grinding water is discharged along the rotation direction R of the spin-drying tank 211, rather than the normal direction of the side wall 211a. This prevents the grinding water discharged from the discharge port 151 from bouncing back and splashing when it collides with the side wall 211a of the rotating spin-drying tank 211, accumulated chips, or grinding water accumulated on the side wall 211a side. As a result, the grinding water is further prevented from entering the chip discharge opening 230.

[0057] In addition, the discharge port 151 of the grinding water inlet pipe 150 is positioned above the center of the dewatering tank 211. This increases the distance that the grinding water discharged from the discharge port 151 travels to reach the bottom plate 212 of the dewatering tank 211, making it easier for the grinding water to be subjected to centrifugal force caused by the rotation of the dewatering tank 211. This allows the separation of the water from the machining chips mixed in the grinding water to be carried out more efficiently.

[0058] <Scraping mechanism> The scraping mechanism 600 includes a scraper 601 for scraping away chips accumulated on the sidewall 211a, and a moving mechanism 602 for moving the scraper 601 between a retracted position and an operating position.

[0059] The scraper 601 is disposed inside the spin tub 211. For example, the scraper 601 is flat, and a cutting edge 601a of the scraper 601 is formed in a shape that follows the side wall 211a. The scraper 601 is not limited to a flat shape, and may have any shape that can scrape away processing waste. A rotating shaft 604 that extends above the spin tub 211 is attached to the scraper 601. The rotating shaft 604 is rotatably held by a holder 605 attached to the top plate 205. The rotating shaft 604 is rotated (forward and reverse rotation) by a motor 603 via a rotation transmission mechanism (a belt, a pulley, a gear, etc.). The motor 603 is attached to the top plate 205. In this embodiment, the rotating shaft 604, the holder 605, the motor 603, etc. constitute a moving mechanism 602. The movement mechanism 602 of the scraper 601 is not limited to the rotation described above, but may be a linear movement.

[0060] For example, the retracted position of the scraper 601 is set to a position where the scraper 601 does not come into contact with the side wall 211a or the accumulated chips when the dewatering tank 211 is rotated to separate the grinding water and chips by centrifugal separation, as shown by the dotted line in Fig. 5. When scraping out chips accumulated on the side wall 211a, the scraper 601 is moved to an operating position where the cutting edge 601a of the scraper 601 is pressed against the side wall 211a, as shown by the solid line in Fig. 5.

[0061] <Water receiving section> A water receiving section 500 is disposed below the centrifugal separator 210. The water receiving section 500 is attached to, for example, the support 203. The water receiving section 500 is positioned below the filter 220 at the bottom of the spin tub 211 to receive water that has passed through the filter 220. For example, the water receiving section 500 has U-shaped channels arranged in a circular ring. For example, the water receiving section 500 is disposed in accordance with the arrangement of the filter. That is, the water receiving section 500 has a water receiving area capable of receiving water that passes through the filter 220 and drops. The water receiving section 500 is disposed outside the opening 230. For example, a sidewall 500a on the inner side (the side facing the rotating shaft 215) of the water receiving section 500 is disposed outside the opening 230 formed in the bottom plate 212. This prevents processing debris that passes through the opening 230 from entering the water receiving section 500. In addition, the water that has passed through the filter 220 is prevented from flowing into the debris receiving section 400. Furthermore, water that has passed through filter 220 can flow into water receiving section 500. Furthermore, the upper end of outer side wall 500b of water receiving section 500 is provided at a position higher than the bottom (bottom plate 212) of spin tub 211. This makes it possible to prevent water that has passed through filter 220 from flowing out of water receiving section 500 to the outside of centrifuge 210.

[0062] The water receiving section 500 may be disposed in any area that receives water that has passed through the filter 220, and at least outside the area where chips scraped out by the scraping mechanism 600 pass through the opening 230. For example, chips scraped out by the scraping mechanism 600 are mainly discharged from the opening 230 near the position where the scraper 601 is disposed. Therefore, the water receiving section 500 may be disposed in a position away from the scraper 601 (e.g., 180° opposite the operating position of the scraper 601) in a part of the opening 230 outside the area where chips pass through. This prevents chips scraped out by the scraping mechanism 600 from entering the water receiving section 500, while preventing grinding water introduced from the outlet 151 of the grinding water inlet pipe 150 from entering the chip receiving section 400.

[0063] A drain port 501 for discharging water is provided in a part of the bottom surface 502 of the water receiving portion 500. The water that has entered the water receiving portion 500 flows from the drain port 501 through a flow path 510 into the tank 81.

[0064] The bottom surface 502 of the water receiving portion 500 may be inclined toward the drain outlet 501. For example, the bottom surface 502 of the water receiving portion 500 is inclined so that the highest point is on the side 180 degrees opposite to the drain outlet 501. This allows the grinding water that flows into the water receiving portion 500 to be efficiently drained from the drain outlet 501.

[0065] <Cleaning water injection section> The cleaning water jetting unit 550 is provided in the grinding water treatment device 200 in order to wash the filter 220 arranged at the bottom of the dewatering tank 211. In Fig. 1, the cleaning water jetting unit 550 includes a tank 554 for storing cleaning water, a pump 551 for sucking in the cleaning water, a nozzle 553 (see Fig. 2) for jetting the cleaning water toward the filter 220, and a pipe 552 connecting the pump 551 and the nozzle 553.

[0066] Nozzle 553 is provided at a position where it sprays cleaning water from below filter 220. In this embodiment, nozzle 553 is provided on outer side wall 500b of water receiving section 500. The tip of nozzle 553 is directed toward filter 220 (i.e., the bottom of spin tub 211). Note that the tip of nozzle 553 may be provided at a position that avoids the position where water that has passed through filter 220 falls, so that it sprays cleaning water obliquely downward toward filter 220. In this case, when cleaning water is not being sprayed, water that has passed through filter 220 is prevented from directly entering the tip of nozzle 553. This prevents nozzle 553 from being clogged with fine machining debris that has passed through filter 220. The mechanism for preventing nozzle 553 from being clogged is not limited to this. For example, a mechanism may be provided where nozzle 553 is located at a retracted position where it is not affected by water that has passed through filter 220 when not being used for cleaning, and moves to a spraying position where it can spray cleaning water toward filter 220 when being used for cleaning. Alternatively, nozzle 553 may be provided inside dehydration tank 211. In this case, nozzle 553 sprays cleaning water from above filter 220. For example, nozzle 553 may be attached to a member such as scraper 601 inside dehydration tank 211.

[0067] When cleaning filter 220, cleaning water stored in tank 554 is sucked by pump 551, passed through pipe 552, and sprayed from nozzle 553 toward filter 220. This unclogs filter 220. Note that the cleaning water may be tap water, and pipe 552 may be connected to a water pipe instead of tank 554.

[0068] <Dust tray> A removably disposed scrap receiver 400 is provided below the opening 230 to receive the processing scraps scraped out by the scraping mechanism 600. For example, the scrap receiver 400 is large enough to accommodate an amount of processing scraps greater than the amount of processing scraps that can be accumulated in the spin tub 211. This reduces the frequency with which the worker must remove (dispose of) the processing scraps, thereby reducing the burden on the worker. A bag may also be placed in the scrap receiver 400. This allows the worker to discard the processing scraps accumulated inside the bag together with the bag, thereby reducing the burden on the worker.

[0069] <Control unit> 6 is a block diagram of the control system in this embodiment. The eyeglass lens processing apparatus according to the present disclosure is provided with a processing apparatus main body 1 and a control unit 70 for controlling the operation of the grinding water treatment device 200. Of course, the control unit for controlling the operation of the processing apparatus main body 1 and the control unit for controlling the operation of the grinding water treatment device 200 may be provided separately. The control unit 70 is connected to each drive source provided in the processing mechanism unit 10 of the processing apparatus main body 1 and the lens refractive surface shape measuring unit 8. The control unit 70 is also connected to each drive source (pump 83, motor 225, motor 603, and pump 551) provided in the grinding water treatment device 200. The control unit 70 is also connected to a monitor 12 used as an example of a notification means.

[0070] <Notification means> The grinding water treatment device 200 may be provided with a monitor 12 that is used as an example of a notification means for notifying an operator of various information. The monitor 12 is connected to the control unit 70 (see FIG. 6). For example, when the centrifuge 210 does not operate normally due to vibration or the like, the control unit 70 can notify the operator of the error through the monitor 12 and request the operator to take action.

[0071] In this embodiment, the monitor 12 is also used as a monitor provided as a notification means (and input means) in the processing device main body 1. Of course, the notification means may not be also used as the notification means provided in the processing device main body 1, but may be provided separately.

[0072] The monitor 12 is an example of a component for notifying the operator, and is not limited to this. For example, the notifying means may be a speaker. In this case, the grinding water treatment device 200 notifies the operator of an error by sound from the speaker. Also, for example, the notifying means may be a lamp. In this case, the grinding water treatment device 200 notifies the operator of an error by lighting up the lamp. Furthermore, the notifying means may be a means for communicating with an external device such as a computer. In this case, the grinding water treatment device 200 notifies the operator of an error via the external device with which it communicates.

[0073] Furthermore, for example, the control unit 70 may issue instructions to the operator via a notification means. For example, the control unit 70 may instruct the operator via the monitor 12 to remove processing debris from the debris receiver 400 when lens processing has been performed a predetermined number of times by the processing device main body 1.

[0074] <Operation> The operation of the eyeglass lens processing apparatus and grinding water treatment device having the above-described configuration will now be described. When the lens LE is held by the lens chuck shafts 2R, 2L and an operation start signal is input to the processing apparatus main body 1, the control unit 70 first operates the lens refractive surface shape measurement unit 8 based on the previously acquired lens shape to measure the refractive surface shape of the lens LE. After measurement of the refractive surface shape of the lens LE is completed, the control unit 70 then drives the pump 83 to spray grinding water from the nozzle 11 while controlling the drive of the carriage unit 3, and grinds the periphery of the lens LE with the grindstone 5. The grinding water, including processing debris generated during processing of the lens LE, is led to the centrifuge 210 by a drainage hose 15 connected to the bottom of the processing chamber 9.

[0075] Here, before supplying grinding water (before driving the pump 83), the control unit 70 drives the motor 225 to rotate the spin tank 211 of the centrifuge 210 at high speed based on a predetermined operation signal from the processing device main body 1. By rotating the spin tank 211 at high speed before the grinding water from the processing device main body 1 flows into the spin tank 211, it is possible to reduce the inflow of grinding water into the opening 230 for discharging processing chips. For example, a trigger signal for starting processing of the processing device main body 1 can be used as the predetermined operation signal. Of course, a measurement start signal or measurement end signal for the lens LE by the lens refractive surface shape measuring unit 8 may also be used. Alternatively, a signal for holding the lens LE on the lens chuck shafts 2R and 2L may be used as the predetermined operation signal.

[0076] Grinding water from the drain hose 15 flows into the inlet 150a of the grinding water inlet pipe 150, passes through the inner pipe 150b and the tip pipe 150c, and is introduced into the spin-drying tub 211, where it is discharged from the outlet 151 toward the side wall 211a of the spin-drying tub 211. In this embodiment, the grinding water inlet pipe 150 is arranged so that the grinding water discharged from the outlet 151 flows toward the side wall 211a. The outlet 151 is also arranged closer to the side wall 211a than the opening 230. This prevents the grinding water from directly entering the opening 230 in the bottom plate 212. Furthermore, because the cross-sectional area of ​​the outlet 151 is smaller than the cross-sectional area of ​​the inlet 150a, the grinding water flows more forcefully toward the side wall 211a, preventing the grinding water from entering the opening 230.

[0077] Furthermore, because the discharge port 151 is oriented in a direction such that the grinding water is discharged along the rotation direction R of the dewatering tank 211 (see FIG. 4), the grinding water discharged from the discharge port 151 is prevented from bouncing back and splashing when it collides with the side wall 211a, accumulated machining chips, etc. This further prevents the grinding water from entering the opening 230.

[0078] An openable / closable shutter may be provided between the opening 230 and the upper part of the chip receiving section 400. In this case, by closing the shutter except when the scraping mechanism 600 is removing the machining chips, it is possible to prevent the grinding water from flowing into the chip receiving section 400 from the opening 230.

[0079] The grinding water containing machining chips introduced into the dewatering tank 211 is separated into the machining chips and water by centrifugal force generated by the high-speed rotation of the dewatering tank 211. When the machining chips contained in the grinding water are heavier than water, the machining chips and water are separated so that the machining chips accumulate first on the side wall 211a side and the water is located on the inside (rotation shaft 215 side), as shown in Fig. 7(a). In Fig. 7, PW indicates the machining chips and GW indicates the separated water.

[0080] Here, if filter 220 is not provided on peripheral portion 212b of bottom plate 212, when spin tub 211 stops rotating (or when spin tub 211 starts rotating at a low speed), the water accumulated inside spin tub 211 flows out through opening 230 located inside peripheral portion 212b and into scrap receiving portion 400.

[0081] In contrast to this, in the present disclosure, filter 220 is provided on peripheral portion 212b of bottom plate 212, so that water accumulated inside dehydration tank 211 passes through filter 220 and is discharged to the outside of dehydration tank 211, preventing it from entering opening 230. In this embodiment, the water that passes through filter 220 enters water receiving portion 500 provided outside opening 230 and is reused as grinding water.

[0082] The present inventors have also newly discovered that, depending on the material of the lens LE, separation of the processing debris from water may be difficult, and processing debris lighter than water may be included. Processing debris lighter than water occurs, for example, when the lens LE is made of a thermoplastic material such as polycarbonate. Polycarbonate is heavier than water before processing, but the processing debris ground by the grinding wheel 5 is softened by the heat during processing, contains air, and is thought to become lighter than water. When the processing debris is lighter than water, centrifugal separation due to the rotation of the dewatering tank 211 causes the water (including grinding water from which the processing debris is not completely separated) to be located on the side of the side wall 211a, and the processing debris to be located on the inside (the side of the rotation shaft 215), as shown in FIG. 7(b).

[0083] Here, as in the above description, if filter 220 is not provided on peripheral portion 212b of bottom plate 212, when rotation of dehydration tank 211 stops (or when dehydration tank 211 starts rotating at a low speed), the machining chips will flow out from opening 230 together with the water accumulated inside dehydration tank 211. In other words, grinding water containing machining chips that have not been centrifuged will flow into chip receiver 400.

[0084] In contrast, in the present disclosure, filter 220 is provided on peripheral portion 212b of bottom plate 212, so that water located closer to sidewall 211a than the processing debris passes through filter 220 and is discharged to the outside of spin-drying tank 211. As a result, only the processing debris accumulates inside spin-drying tank 211.

[0085] After the processing of the lens LE is completed and the supply of grinding water from the nozzle 11 is stopped, the control unit 70 does not immediately stop the rotation of the dewatering tank 211, but stops the driving of the motor 225 a certain time after the processing of the lens LE is completed, thereby stopping the rotation of the dewatering tank 211. By continuing to rotate the dewatering tank 211 even after the processing of the lens LE is completed, dewatering of processing debris accumulated inside the dewatering tank 211 is promoted.

[0086] The scraping mechanism 600 is operated by the control unit 70 to discharge the processing debris accumulated inside the spin-drying tank 211 from the spin-drying tank 211. The control unit 70 may operate the scraping mechanism 600 when the processing amount of the lens LE reaches a predetermined standard, rather than operating the scraping mechanism 600 each time the processing of one lens LE is completed. This allows for continuous and efficient processing of multiple lenses LE. The predetermined standard for the processing amount is determined based on, for example, at least one of the number of lenses LE processed, the processing time for the lenses LE, and the amount of grinding water used. Of course, the predetermined standard for the processing amount is not limited to these, and various information can be used. If the control unit 70 is provided separately from the control unit of the processing apparatus main body 1, information from the control unit of the processing apparatus main body 1 is transmitted to the control unit 70.

[0087] When the amount of processing of the lens LE reaches a predetermined standard, the control unit 70 drives the motor 225 so that the rotation speed of the spin tank 211 becomes slower than the rotation speed during centrifugation of the grinding water. The control unit 70 also drives the motor 603 to move the scraper 601, which was placed in the retracted position, to the operating position (the position where the cutting edge 601a contacts the side wall 211a) (see FIG. 5). With the scraper 601 in the operating position, the spin tank 211 is rotated multiple times or for a certain period of time, whereby processing debris accumulated on the side wall 211a is scraped off by the scraper 601, falls downward, and is discharged outside the spin tank 211 through an opening 230 provided in the bottom plate 212. The processing debris discharged through the opening 230 is received by the debris receiver 400. When the removal of the processing waste accumulated on the side wall 211a is completed, the control unit 70 controls the driving of the motor 603 to move the scraper 601 to the retracted position.

[0088] The control unit 70 may control the operation of the processing device main body 1 when processing debris is removed in the grinding water treatment device 200. For example, while processing debris is being removed, the processing device main body 1 may stop the lens processing operation so that grinding water does not flow into the dewatering tank 211. In this case, the control unit 70 may notify the operator via the monitor 12 that processing debris is being removed.

[0089] As described above, the processing debris accumulated inside the dehydration tank 211 is automatically discharged outside the dehydration tank 211 by the control unit 70 operating the scraping mechanism 600, eliminating the need for an operator to take out the processing debris. Furthermore, the time required to scrape out the processing debris by operating the scraping mechanism 600 may be shorter than the processing time for one lens LE. This prevents a significant decrease in the processing efficiency of the lenses LE, even in continuous processing of lenses LE at a processing center (a lens processing factory where eyeglass lenses are processed in a concentrated manner). Furthermore, the amount of processing debris that can be accommodated in the scrap receiver 400 can be made larger than the amount of processing debris accumulated in the dehydration tank 211, allowing an operator to efficiently dispose of the processing debris collectively without increasing the size of the dehydration tank 211.

[0090] After removing the processing debris accumulated in the spin tub 211 using the scraping mechanism 600, the control unit 70 activates the cleaning water spraying unit 550. The control unit 70 rotates the spin tub 211 while driving the pump 551 to spray cleaning water from the nozzle 553 toward the filter 220. For example, the control unit 70 rotates the spin tub 211 multiple times or for a fixed period of time. This allows the filter 220 to be unclogged even if it has become clogged with processing debris, and the filter 220 can be reused.

[0091] The cleaning water spraying unit 550 does not have to be operated every time the scraping mechanism 600 removes processing debris from inside the spin tank 211, but may be operated after the scraping mechanism 600 has been operated multiple times. In this case, the operation of the cleaning water spraying unit 550 reduces the time that lens processing by the processing device main body 1 is stopped, and therefore the lenses LE can be processed efficiently at the processing center.

[0092] During the operation of the grinding water treatment device 200 as described above, if the centrifuge 210 does not operate normally due to vibration or the like, the control unit 70 displays an error on the monitor 12 to notify the operator of an abnormality in the centrifuge 210. In this case, the monitor 12 of the processing device main body 1 may also be used. When the centrifuge 210 is housed inside the table 20, the operator usually does not directly observe the centrifuge 210 while it is operating. For this reason, the operator may not notice an abnormality in the centrifuge 210. Since the processing device main body 1 is mounted on the table 20, the operator can observe the monitor 12 of the processing device main body 1 even while the centrifuge 210 is operating. This allows the operator to easily know of an abnormality in the centrifuge 210.

[0093] (Second Example) The second embodiment is an example in which the grinding water introduction unit is mainly different from the first embodiment. In the second embodiment, the grinding water introduction unit has a different configuration, and therefore the spin-drying tank 211 of the centrifuge 210, the mechanism for rotating the spin-drying tank 211, the scraping mechanism 600, etc., of the first embodiment are partially different in configuration. The grinding water treatment device of the second embodiment will be described below with reference to Figures 8 and 9. Note that components that perform the same functions as those of the first embodiment are given the same reference numerals, and detailed description thereof will be omitted. The following description will focus on the differences from the first embodiment.

[0094] <Centrifuge> FIG. 8 is a diagram illustrating the configuration of a grinding water treatment apparatus 200 of a second embodiment. A spin-drying tub 211B of a centrifuge 210B provided in the grinding water treatment apparatus 200 is rotatably supported by a support mechanism 201. A base 206B is fixed to four support columns 203 of the support mechanism 201. The spin-drying tub 211B is rotated by a rotation unit 217B. The rotation unit 217B includes a rotation shaft 215B of the spin-drying tub 211B and a motor 225 (see FIG. 6), which is an example of a drive source. The rotation shaft 215B is rotatably held by a holding member 216B. The holding member 216B is disposed on and fixed to the base 206B. The rotation shaft 215B is rotated by a motor 225 (illustration of the motor 225 is omitted in FIG. 8) attached below the base 206B.

[0095] The side wall 211Ba of the dehydration tank 211B has a first side wall 211BaA at the bottom and a second side wall 211BaB provided on the first side wall 211BaA. The first side wall 211BaA and the second side wall 211BaB may be integrally formed. The first side wall 211BaA has a cylindrical surface or a conical surface with a smaller diameter at the top than at the bottom. The second side wall 211BaB has a conical surface with a smaller diameter at the top than at the bottom. The angle β formed by the conical surface of the second side wall 211BaB with respect to the vertical direction is larger than the angle α formed by the conical surface of the first side wall 211BaA with respect to the vertical direction. For example, the angle α is set to be 0 to 10 degrees, and the angle β is set to be 20 to 50 degrees. The upper end of the first side wall 211BaA and the lower end of the second side wall 211BaB are formed to be continuously connected with the same diameter so as to avoid any step. An upper wall 211Bb of the dehydration tank 211B is formed on the second side wall 211BaB.

[0096] As in the first embodiment, a bottom plate 212B is attached to the bottom of the side wall 211Ba. The bottom plate 212B is provided with an opening 230 for discharging the chips scraped out by the scraping mechanism 600B to the outside of the spin tub 211B. In the centrifuge 210B of the second embodiment, a connecting member 162B (described in detail below) that connects the rotating shaft 215B to the spin tub 211B is provided on the upper part of the rotating shaft 215B. Therefore, the bottom plate 212B does not include the center portion 212a and four connecting portions 212c of the bottom plate 212 shown in FIG. 3 (an explanatory diagram of the bottom plate 212B is omitted, and FIG. 3 is used instead). The absence of the connecting portions 212c in the bottom plate 212B prevents chips from falling and piling up on the connecting portions 212c when scraped out by the scraping mechanism 600B.

[0097] As in Figure 3, in the bottom plate 212B, a filter 220 is provided in the peripheral portion 212b, which is the outer area of ​​the opening 230, to allow water separated from the processing debris by the rotation of the dehydration tank 211 to pass through and be discharged outside the dehydration tank 211.

[0098] In the second embodiment, motor 225 and a rotation transmission mechanism (not shown) for rotating rotation shaft 215B are attached below spin tub 211B, and a waterproof cover (not shown) is placed above them. Base 206B is also provided with hole 207B for passing through chips that fall when scraped out by scraping mechanism 600B.

[0099] <Grinding water introduction unit> A grinding water receiving portion 153B constituting a grinding water introduction unit 150B for introducing grinding water from the processing apparatus main body 1 into the dewatering tank 211B is disposed on the rotation shaft 215B of the dewatering tank 211B. The grinding water receiving portion 153B is disposed inside the dewatering tank 211B and is rotated in the same direction as the dewatering tank 211B by a rotation unit 217B. In the second embodiment, the rotation unit 217B is also used as a rotation unit that rotates the dewatering tank 211B. The rotation unit 217B rotates the grinding water receiving portion 153B integrally with the dewatering tank 211B. A discharge opening 160B for discharging grinding water toward a side wall 211Ba of the dewatering tank 211B (in the embodiment, the second side wall 211BaB) is provided on the outer periphery of the grinding water receiving portion 153B.

[0100] Above the grinding water receiving section 153B, an inlet 150Ba is provided for introducing grinding water discharged from the processing apparatus main body 1. The inlet 150Ba is attached to the top plate 205B. The top plate 205B is fixed to four supports 203. A drain hose 15 extending from the processing apparatus main body 1 is connected to the inlet 150Ba. For example, the inlet 150Ba is a circular pipe and is arranged concentrically with the rotation shaft 215B. A lid member 214B is attached to the top wall 211Bb of the spin tank 211B. The lid member 214B has a hole formed therein through which the inlet 150Ba is inserted, and the lid member 214B rotates together with the spin tank 211B. The lid member 214B reduces the outflow of grinding water from the top of the spin tank 211B when grinding water is introduced into the grinding water receiving section 153B through the inlet 150Ba. The cover member 214B may be formed integrally with the upper wall 211Bb.

[0101] FIG. 9 is a diagram illustrating the configuration of the grinding water receiving portion 153B. FIG. 9(a) is a diagram illustrating the vicinity of the grinding water receiving portion 153B in FIG. 8, and FIG. 9(b) is a cross-sectional view (cross-sectional view seen from above) taken along line A-A in FIG. 9(a). For example, the grinding water receiving portion 153B includes a water receiving plate 155B with a bottom that receives grinding water introduced from the inlet 150Ba. The water receiving plate 155B is attached to the top of the rotating shaft 215B. The water receiving plate 155B rotates together with the rotating shaft 215B, thereby rotating integrally with the spin tub 211B. For example, the water receiving plate 155B is formed in a disk shape concentric with the rotating shaft 215B. The height of the top surface of the water receiving plate 155B (the surface that receives grinding water) is located above the first side wall 211BaA and between the heights of the first and second side walls 211BaA and 211BaB. For example, the upper surface of the water receiving plate 155B is positioned at the center of the height width of the second side wall 211BaB, so that grinding water poured onto the upper surface of the water receiving plate 155B is directed toward the second side wall 211BaB when it is released from the water receiving plate 155B by centrifugal force (the detailed operation will be described later).

[0102] Furthermore, for example, the water receiving plate 155B is formed in a disk shape with a diameter larger than that of the inlet 150Ba. The inlet 150Ba is located above the water receiving plate 155B and need not necessarily be arranged concentrically with the rotation shaft 215B, as long as it can introduce the grinding water discharged from the processing apparatus main body 1 onto the water receiving plate 155B. The shape of the upper surface of the water receiving plate 155B is not limited to a horizontal plane. For example, the shape of the upper surface of the water receiving plate 155B may be a conical surface with a convex central portion. For example, the inclination of the conical surface relative to the horizontal direction may be 40 degrees or less, preferably 10 to 20 degrees. In this case, the grinding water flowing from the inlet 150Ba can be prevented from splashing upward when it hits the conical surface of the water receiving plate 155B, and the centrifugal force also makes it easier for the grinding water to flow sideways.

[0103] <Connection structure between dehydration tank and rotating shaft> Furthermore, centrifuge 210B is provided with connecting member 162B that connects rotating shaft 215B and spin tub 211B to rotate spin tub 211B integrally with rotating shaft 215B. In the second embodiment, a plurality of (e.g., four) connecting members 162B that connect water receiving plate 155B and spin tub 211B are provided between water receiving plate 155B and spin tub 211B. That is, in the disclosure of the second embodiment, water receiving plate 155B is interposed between spin tub 211B and water receiving plate 155B, and spin tub 211B rotates integrally with rotating shaft 215B. In the disclosure of FIGS. 8 and 9, connecting member 162B is provided at a position that connects the upper surface of water receiving plate 155B to upper wall 211Bb (which may further include second side wall 211BaB). Discharge openings 160B for discharging grinding water toward the side wall 211Ba are formed between the plurality of connecting members 162B. In the disclosure of Figures 8 and 9, the discharge openings 160B are provided so as to discharge the grinding water horizontally, but they may also be provided so as to discharge the grinding water obliquely upward.

[0104] <Scraping mechanism> The scraping mechanism 600B includes a scraper 601 for scraping away chips accumulated on the sidewall 211Ba. A moving mechanism 602B for moving the scraper 601 between a retracted position and an operating position uses a rotary moving mechanism in the first embodiment, but a linear moving mechanism in the second embodiment. The moving mechanism 602B is attached to the holding member 216B inside the dewatering tub 211B, and moves two support members 607B that support the scraper 601 linearly in the horizontal direction, thereby moving the scraper 601 between the retracted position and the operating position. The moving mechanism 602B includes a motor 603 (see FIG. 6), which is an example of a drive source for moving the support members 607B.

[0105] As in the first embodiment, a chip receiving section (bucket) 400 for receiving chips is removably disposed below the centrifuge 210. In the second embodiment, a base 206B to which a holding member 216B is fixed is disposed between the centrifuge 210 and the chip receiving section 400, and holes 207B for passing chips through the base 206B may be formed so as to correspond to the retracted position and operating position of the scraper 601.

[0106] <Operation of the second embodiment> The operation of the grinding water treatment device of the second embodiment will be described, focusing on the differences from the first embodiment.

[0107] Grinding water from the processing apparatus main body 1 is introduced (introduced) into the grinding water receiving section 153B from the inlet 150Ba via the drain hose 15. Before the grinding water is introduced into the grinding water receiving section 153B, the water receiving plate 155B of the grinding water receiving section 153B is rotated at high speed together with the spin-drying tank 211B based on a predetermined operation signal from the processing apparatus main body 1. The grinding water introduced from the inlet 150Ba is received by the water receiving plate 155B. Because the water receiving plate 155B is rotating in the same direction as the spin-drying tank 211, centrifugal force acts on the grinding water received by the water receiving plate 155B, causing the grinding water to be sprayed radially. The grinding water is then splashed out of the discharge opening 160B and forcefully discharged (released) out of the grinding water receiving section 153B. At the same time, a force acts on the grinding water in the direction of rotation of the water receiving plate 155B. That is, when the water receiving plate 155B is rotated integrally with the dewatering tank 211, the grinding water discharged from the discharge opening 160B is subjected to substantially the same rotational force in the same direction as the rotation of the dewatering tank 211B. The water receiving plate 155B is rotated at the same high speed as the dewatering tank 211B for separating the grinding water into machining chips and water, so that the grinding water is discharged from the discharge opening 160B at a speed faster than the falling speed due to gravity in the first embodiment.

[0108] In the grinding water introduction unit 150B of the second embodiment, as described above, the grinding water discharged from the discharge opening 160B is subjected to substantially the same rotational force in the same direction as the rotation of the dewatering tank 211B. Therefore, when the grinding water collides with the side wall 211Ba (the wall of grinding water accumulated on the side wall 211a), which is rotating at high speed, the generation of splashes of grinding water is more suppressed than in the configuration of the grinding water introduction pipe 150 of the first embodiment. Furthermore, the suppression of the generation of splashes of grinding water reduces the possibility that unfiltered grinding water will flow out of the chip discharge opening 230 and the possibility that grinding water will flow into the chip receiver 400. Furthermore, the suppression of the generation of splashes of grinding water also reduces the interference with the centrifugation of the chips and water caused by the grinding water accumulated on the side wall 211Ba compared to the configuration of the first embodiment. This allows the spin-drying tank 211B to efficiently separate the chips and water from each other by centrifugation.

[0109] Furthermore, in the example of sidewall 211Ba of dewatering tub 211B shown in FIG. 8, the angle β formed by the conical surface of second sidewall 211BaB with respect to the vertical direction is larger than the angle α formed by the conical surface of first sidewall 211BaA with respect to the vertical direction. The height of the upper surface (surface receiving grinding water) of water receiving plate 155B is located higher than that of first sidewall 211BaA. Therefore, the grinding water discharged from discharge opening 160B is directed to collide with second sidewall 211BaB. The grinding water that collided with second sidewall 211BaB flows toward first sidewall 211B, which has a larger diameter than second sidewall 211BaB, due to the centrifugal force of dewatering tub 211B. This also allows efficient separation of chips and water by dewatering tub 211B, and allows chips to accumulate on the first sidewall 211B side.

[0110] Furthermore, in the disclosure of the first embodiment, when the amount of grinding water introduced from the inlet 150Ba is small, the force of the grinding water toward the side wall 211a is weak (the speed is slow), and the grinding water is likely to fall toward the bottom plate 212. In contrast, in the grinding water introduction unit 150B of the second embodiment, centrifugal force also acts on the grinding water that flows in from the inlet 150Ba and is received by the water receiving plate 155B, so that even when the amount of grinding water is small, the force of the grinding water discharged from the discharge opening 160B and splashed toward the side wall 211Ba is strong (the speed is fast), and the grinding water is prevented from directly falling toward the bottom plate 212B. As a result, even when the amount of grinding water is small, the high-speed rotating dewatering tank 211B efficiently separates the machining chips from the water.

[0111] The grinding water accumulated inside the dewatering tank 211B (side wall 211Ba) is separated into chips and water by the centrifugal force of the dewatering tank 211B. Then, as shown in Fig. 7, the water separated from the chips passes through filter 220 provided at the bottom of the dewatering tank 211B and is discharged outside the dewatering tank 211B. As a result, only chips accumulate inside the dewatering tank 211B.

[0112] When the amount of processing of the lens LE reaches a predetermined standard, the scraping mechanism 600B is driven under the control of the control unit 70, and the scraper 601, which was placed in the retracted position, is moved to the operating position. In this state, the spin-drying tank 211B is rotated, and the processing debris accumulated on the first side wall 211B is scraped off by the scraper 601, drops, and is discharged outside the spin-drying tank 211B through the opening 230 provided in the bottom plate 212B.

[0113] The grinding water treatment device 200 of the second embodiment includes a water receiving section 500 and a cleaning water spraying section 550, but the operation thereof is basically the same as that of the first embodiment, so a description thereof will be omitted.

[0114] <Modification of the second embodiment> The arrangement of the coupling member 162B shown in FIG. 9 is not limited to the above, as long as it can rotate the spin tub 211B integrally with the rotating shaft 215B. For example, the coupling member 162B may be attached to the rotating shaft 215B. The coupling member 162B may also be separate from the grinding water receiving portion 153B (water receiving plate 155B). For example, as in the first embodiment, the coupling member 162B may be provided on the bottom plate 212B of the spin tub 211B. When the coupling member 162B is separate from the grinding water receiving portion 153B, the discharge opening 160B can be provided around the entire circumference of the water receiving plate 155B. When the coupling member 162B is provided on the water receiving plate 155B as shown in FIG. 9, the coupling member 162B acts as a barrier, potentially causing grinding chips mixed in the grinding water to accumulate on the water receiving plate 155B. In contrast, if the discharge openings 160B are provided around the entire periphery of the water receiving plate 155B, the accumulation of grinding chips on the water receiving plate 155B is further reduced.

[0115] Although typical embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments shown here, and various modifications are possible within the scope of the same technical concept of the present disclosure. [Explanation of symbols]

[0116] 1 Processing equipment main body 70 Control Unit 80 Pump tank section 150 Grinding water inlet pipe 150B Grinding water introduction unit 153B Grinding water receiver 160B Discharge opening 200 Grinding water treatment equipment 210, 210B centrifuges 211, 211B Dehydration tank 211a, 211Ba side wall 212, 212B bottom plate 215, 215B Rotating shaft 217B Rotating Unit 220 filters 230 Aperture 500 Water receiving section 550 Cleaning water injection unit 600, 600B scraping mechanism

Claims

1. Grinding water treatment equipment for eyeglass lens processing a centrifugal separator having a dehydration tank into which grinding water used in the eyeglass lens processing device is introduced, and which separates the grinding water into water and processing chips by rotation of the dehydration tank; scraping means for scraping out chips accumulated on the side wall inside the dewatering tank; an opening provided in the dewatering tub for discharging the scraps scraped out by the scraping means to the outside of the dewatering tub; a filter provided in an area outside the opening, for passing water separated from the processing debris by the rotation of the dewatering tub, and for allowing the processing debris to remain inside the dewatering tub; the opening is formed in the bottom of the dewatering tank so that the scraps scraped out by the scraping means and dropped therethrough can pass through; 10. The grinding water treatment device for eyeglass lens processing, wherein the filter is provided at the bottom of the dewatering tank in an area outside the opening.

2. 2. The grinding water treatment device for eyeglass lens processing according to claim 1, 10. The grinding water treatment device for eyeglass lens processing, wherein the filter is provided between the opening and a side wall of the dewatering tank.

3. 3. The grinding water treatment device for eyeglass lens processing according to claim 1, A grinding water treatment device for eyeglass lens processing, characterized by comprising a grinding water introduction means for introducing grinding water from an eyeglass lens processing device into the dehydration tank, and a grinding water introduction means for discharging the grinding water toward the side wall of the dehydration tank.

4. 4. The grinding water treatment device for eyeglass lens processing according to claim 3, The grinding water introducing means is a grinding water receiving section into which grinding water discharged from the eyeglass lens processing device is introduced, and includes a grinding water receiving section disposed inside the dehydration tank, and a rotating means for rotating the grinding water receiving section in the same direction as the rotation direction of the dehydration tank, 10. A grinding water treatment device for eyeglass lens processing, comprising: a drain opening provided on the outer periphery of said grinding water receiving portion for draining grinding water toward a side wall of said dewatering tank.

5. 5. The grinding water treatment device for eyeglass lens processing according to claim 4, 1. A grinding water treatment device for eyeglass lens processing, characterized in that the rotating means is also used as a rotating means for rotating the dewatering tank, and the grinding water receiving section rotates integrally with the dewatering tank.

6. The grinding water treatment device for eyeglass lens processing according to any one of claims 1 to 5, A grinding water treatment device for eyeglass lens processing, characterized in that it comprises a water receiving portion arranged below the filter to receive water that passes through and falls down, the receiving portion being arranged in an area outside the opening.

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