Patent Description:
As a grinding water treatment device for eyeglasses lens processing, a device that separates and treats processing chips and water by using a centrifugal separator is known (refer to <CIT>,.

<CIT> and <CIT>). In a centrifugal separator of <CIT>, water is separated by repelling water from an opening opened at an upper portion of a dehydration tank by rotating the dehydration tank. In a centrifugal separator of <CIT>, a conical filter is supported by a support frame inside a rotating dehydration tank, and water is filtered outward to be separated by the filter rotated together with the dehydration tank. In <CIT> water is filtered outwardly by a cylindrical rotating filter.

However, in the centrifugal separators disclosed in <CIT>, <CIT> and <CIT>, it is necessary for an operator to frequently take out the processing chips accumulated inside the dehydration tank, which makes the work troublesome and inefficient. <CIT> discloses a method and device for treating muddy water of slurry excavation method and industrial waste water, in which the waste muddy water, etc., are entered via a pipeline into a neutralization chamber by the effect of a liquid pump in an original liquid tank and are neutralized and coagulated by an aluminium sulfate, etc., from a coagulant tank. Inorganic flocculating agent is primarily added from flocculating agent tank to the waste muddy water during the passage of the muddy water through the inside of the pipeline by the effect of a fluid pump in the neutralization chamber. <CIT> discloses a centrifugal separation device in which a stock liquid intended for treatment is introduced into a rotating container, and the rotating container is rotated, the stock liquid is separated from a solid by the action of centrifugal force and filtration, the liquid is discharged outside a filter cloth, while the solid is left inside the filter cloth. If a predetermined quantity of the solid is accumulated inside the filter cloth, the filter cloth is rotated reversely to rotate the rotating container. The solid is scattered away from the filter cloth by centrifugal force, so that the filter cloth is prevented from being clogged.

An object of the present disclosure is to provide an eyeglasses lens processing apparatus including a grinding water treatment device for eyeglasses lens processing, which enables to efficiently and appropriately treat grinding water and processing chips, as defined in claim <NUM>. Further embodiments are defined in dependent claims <NUM>-<NUM>.

An embodiment of a grinding water treatment device for eyeglasses lens processing according to the present disclosure will be described. The items classified by < > below can be used independently or in association with each other.

The grinding water treatment device exemplified in the present disclosure (for example, a grinding water treatment device <NUM>) includes a centrifugal separator (for example, centrifugal separators <NUM> and 210B). For example, the centrifugal separator includes a dehydration tank (for example, dehydration tanks <NUM> and 211B). For example, grinding water that has been used is introduced into the dehydration tank from a processing device (for example, a processing device <NUM>) of an eyeglasses lens. For example, the centrifugal separator separates the grinding water into water and processing chips by rotation of the dehydration tank. For example, the centrifugal separator includes a scraping unit (for example, scraping mechanism units <NUM> and 600B). For example, the centrifugal separator may include a grinding water introducing unit (for example, a grinding water introduction pipe <NUM> and a grinding water introduction unit 150B). For example, the centrifugal separator may include a wash water injection unit (for example, a wash water injection unit <NUM>) that ejects wash water.

The grinding water treatment device includes a water receiving unit (for example, a water receiving unit <NUM>) that receives water discharged from the dehydration tank, which is water separated by the rotation of the dehydration tank. For example, the grinding water treatment device may include a grinding water tank (for example, a tank <NUM>) for storing the grinding water supplied to the processing device. For example, the water separated from the grinding water is discharged into the grinding water tank by a centrifugal separator, and accordingly, the grinding water is repeatedly used by the processing device. For example, the grinding water treatment device may include a notification unit (for example, a monitor <NUM>).

The scraping unit is configured to scrape out the processing chips accumulated inside the dehydration tank. For example, the scraping unit includes a scraper (for example, a scraper <NUM>) which is a member for scraping out the processing chips accumulated on an interior side of a side wall inside the dehydration tank. For example, the scraper is disposed inside the dehydration tank. For example, the scraper has a shape capable of scraping out the processing chips accumulated on the interior side of the side wall inside the dehydration tank. For example, the scraper includes a cutting edge portion (for example, a cutting edge portion 601a) having a shape along an interior wall of the side wall inside the dehydration tank. For example, the scraping unit includes a moving mechanism (for example, moving mechanisms <NUM> and 602B) for moving the scraper between a retracted position and an operating position for scraping out the processing chips.

For example, the dehydration tank includes a substantially cylindrical side wall (for example, side walls 211a and 211Ba). The side wall inside the dehydration tank may have a conical shape of which the lower diameter is larger than that of the upper diameter. It is needless to say that the shape of the dehydration tank is not limited to these shapes. For example, the shape of the dehydration tank may be any shape as long as the grinding water can be separated into processing chips and water by the rotation of the dehydration tank.

For example, the rotation shaft of the dehydration tank may be rotatably held by a holding member (for example, a holding member <NUM>) provided in a support mechanism (for example, a support mechanism <NUM>) positioned at the upper portion of the dehydration tank. Then, the lower portion of the rotation shaft (for example, a rotation shaft <NUM>) may be fixed to the bottom portion (for example, a bottom plate <NUM>) of the dehydration tank. The dehydration tank is rotated by the rotation of the rotation shaft.

For example, the rotation shaft of the dehydration tank may be rotatably held by a holding member (for example, a holding member 216B) provided in a support mechanism (for example, a base 206B) positioned at the lower portion of the dehydration tank. Then, a coupling member (for example, a coupling member 162B) for coupling the upper portion (for example, an upper wall 211Bb and a second side wall 211BaB) of the dehydration tank and the rotation shaft may be provided.

For example, an upper wall (for example, an upper wall 211b) may be provided at the upper portion of the dehydration tank. For example, the upper wall is formed in an annular shape. For example, in a case where the rotation shaft of the dehydration tank extending from the upper portion of the dehydration tank, the moving shaft of the scraping unit, and the grinding water introduction pipe are disposed inside the annular shape of the upper wall, the dehydration tank is rotated without interfering with these. For example, the upper wall is formed so as to extend in the horizontal direction from the upper end of the side wall inside the dehydration tank. It is needless to say that the shape of the upper wall is not limited thereto. For example, the upper wall may be inclined such that the rotation center side of the dehydration tank is higher than the upper portion of the side wall. Further, the upper wall may not necessarily have to be provided. For example, the upper portion of the side wall may be inclined toward the center of rotation and the side wall may also serve as the upper wall such that the bottom portion and the side wall inside the dehydration tank secure a region where processing chips are accumulated.

For example, the dehydration tank is provided with an opening (for example, opening <NUM>). For example, the opening is provided to eject the processing chips scraped out by the scraping unit to the outside of the dehydration tank. For example, the opening is formed at the bottom portion of the dehydration tank such that the dropped processing chips scraped out by the scraping unit can pass through the opening. Since this opening is formed at the bottom portion of the dehydration tank, the processing chips scraped out by the scraping unit and naturally dropped can pass through the opening and be ejected to the outside of the dehydration tank. Therefore, the processing chips accumulated in the dehydration tank can be efficiently and appropriately treated. In addition, for example, in a case where the opening is provided at the bottom portion of the dehydration tank, a chips receiving unit (for example, a chips receiving unit <NUM>) may be provided under the opening. In addition, the opening may be provided at the upper portion of the dehydration tank.

The grinding water treatment device is provided with a filter (for example, a filter <NUM>). The filter is provided in the dehydration tank. The filter allows water separated from the grinding water by the rotation of the dehydration tank to pass therethrough, and allows the processing chips to be accumulated (present) inside the dehydration tank. The filter is provided in the outer region (region outside the opening) of the opening for ejecting the processing chips. The filter may be provided in the outer region of the opening at a position where the processing chips can be accumulated inside the dehydration tank. The filter is provided at the bottom portion of the dehydration tank. The filter is provided between the opening for ejecting the processing chips and the side wall inside the dehydration tank. For example, the filter may be in the form of a mesh.

In the present disclosure, since the filter is provided in the outer region of the opening for ejecting the processing chips, the water centrifugally separated inside the dehydration tank goes out of the dehydration tank through the filter, and thus, it is possible to suppress the discharge of the water in the dehydration tank from the opening. Accordingly, it is possible to suppress the mixing of the water into the processing chips ejected from the opening by the scraping unit, and the processing chips can be efficiently and appropriately treated.

In addition, in a case where the grinding water contains processing chips lighter than water, the water separated by centrifugal separation is positioned on the side wall side of the dehydration tank. In this case as well, the centrifugally separated water is discharged to the outside of the dehydration tank through the filter, and the processing chips are accumulated inside the dehydration tank. Accordingly, the processing chips accumulated inside the dehydration tank can be efficiently dehydrated, and the processing chips can be appropriately treated.

Further, since the filter is provided in the outer region of the opening and at the bottom portion of the dehydration tank, even in a case where the rotation of the dehydration tank is stopped due to insufficient dehydration of the processing chips, the water remaining inside the dehydration tank passes through the filter and is discharged. Accordingly, it is possible to further suppress the outflow of water from the opening provided at the bottom portion of the dehydration tank, and it is possible to appropriately treat the processing chips.

The filter is disposed at the bottom portion of the dehydration tank and is provided at least in the outer region of the opening. As an example of the arrangement of the filter in this case, the filter may be disposed on the entire surface of the bottom portion of the dehydration tank.

Further, the filter is provided for accumulating the processing chips in the dehydration tank and discharging the water to the outside of the dehydration tank.

For example, the grinding water introducing unit introduces the grinding water from the processing device into the dehydration tank. For example, the grinding water introducing unit is configured with a flow path for introducing the grinding water into the dehydration tank. For example, the grinding water introducing unit is provided so as to discharge the grinding water toward the interior side of the side wall inside the dehydration tank. Accordingly, it is possible to suppress the direct entrance of the grinding water discharged from the grinding water introducing unit to the opening for ejecting the processing chips. Further, since the grinding water is directed toward the interior side of the side wall, the grinding water is easily subjected to the action of centrifugal separation, and the processing chips and water are efficiently separated by centrifugal separation.

In addition, "discharging the grinding water toward the interior side of the side wall inside the dehydration tank" by the grinding water introducing unit of the present disclosure includes discharging the grinding water toward the interior side of the side wall inside the dehydration tank, and the discharged grinding water hits not only the side wall.

For example, in a case where the upper wall extending from the side wall inside the dehydration tank is provided so as to be inclined such that the rotation center side of the dehydration tank is higher than the upper portion of the side wall, the grinding water is discharged toward the interior side of the side wall inside the dehydration tank, and accordingly, the grinding water may hit the upper wall. According to this, the time required for the grinding water to be transferred along the side wall inside the dehydration tank and reach the filter is longer, and thus, the time for receiving the centrifugal force due to the rotation of the dehydration tank is increased, and as a result, the water and processing chips can be more efficiently separated from the grinding water.

For example, the grinding water introducing unit includes a grinding water introduction pipe for introducing the grinding water into the dehydration tank. For example, the discharge port of the grinding water introduction pipe is arranged on the side wall side of the dehydration tank with respect to the opening provided in the dehydration tank. Accordingly, it is further suppressed that the grinding water enters the opening for allowing the processing chips to pass therethrough.

In addition, for example, the grinding water introduction pipe extends inward from the upper portion of the dehydration tank, and the grinding water is dropped due to gravity. Further, the discharge port of the grinding water introduction pipe may be directed toward the interior side of the side wall inside the dehydration tank such that the grinding water is discharged toward the interior side of the side wall inside the dehydration tank. Accordingly, the grinding water is discharged toward the interior side of the side wall inside the dehydration tank by utilizing the force of the natural drop of the grinding water without using a pump.

Further, the cross-sectional area of the discharge port of the grinding water introduction pipe may be smaller than the cross-sectional area of the introduction port of the grinding water introduction pipe. Accordingly, the force of the grinding water emitted from the discharge port toward the interior side of the side wall inside the dehydration tank is gained, the grinding water is less likely to flow into the opening that allows the processing chips to pass therethrough, and the centrifugal separation by the rotation of the dehydration tank can be efficiently performed. In addition, accordingly, it is possible to contribute to the miniaturization of the dehydration tank.

Further, the direction of the discharge port of the grinding water introduction pipe may be directed not in the normal direction of the side wall inside the dehydration tank but in the direction in which the discharged grinding water heads along the rotation direction of the dehydration tank. Accordingly, when the grinding water discharged from the discharge port collides with the side wall inside the rotating dehydration tank, the accumulated processing chips, or the grinding water collected on the side wall side, bouncing and scattering are suppressed. As a result, it is possible to further suppress the entrance of the grinding water into the opening for ejecting the processing chips.

In one example of the present disclosure, since the opening for ejecting the processing chips is provided at the bottom portion of the dehydration tank, there is a new problem that the grinding water introduced from the grinding water introduction pipe enters the opening. In order to alleviate this problem, in the present disclosure, the arrangement of the grinding water introduction pipe inside the dehydration tank is devised as described above.

Further, for example, the grinding water introducing unit may have a grinding water receiving unit (for example, a grinding water receiving unit 153B). The grinding water discharged from the processing device is introduced (charged) into the grinding water receiving unit. For example, the grinding water receiving unit is disposed inside the dehydration tank. For example, the grinding water introducing unit may include a rotation unit (for example, a rotation unit 217B) that rotates the grinding water receiving unit in a direction identical to the rotation direction of the dehydration tank. Furthermore, the grinding water receiving unit may be rotated integrally with the dehydration tank. Then, a discharge opening (for example, a discharge opening 160B) for discharging the grinding water toward the interior side of the side wall inside the dehydration tank may be provided on the outer periphery of the grinding water receiving unit. In this case, since the grinding water receiving unit is rotated in the same direction as the rotation direction of the dehydration tank, centrifugal force also acts on the grinding water received by the grinding water receiving unit, the grinding water is vigorously discharged (emitted) from the outer periphery of the discharge opening, and a force in the rotation direction acts on the grinding water discharged from the discharge opening at the same time. Accordingly, the generation of splashes (sprays) when the grinding water collides with the side wall (or the wall of the grinding water collected on the side wall) inside the dehydration tank that rotates at high speed is suppressed. In addition, the inhibition of centrifugal separation between the processing chips and water related to the grinding water collected on the side wall is suppressed, and the centrifugal separation between the processing chips and water is efficiently performed.

For example, the rotation unit of the grinding water receiving unit may be rotated integrally with the dehydration tank by being shared with the rotation unit (for example, a rotation unit 217B) of the dehydration tank. Further, the grinding water receiving unit may be attached to the rotation shaft (for example, a rotation shaft 215B) of the dehydration tank. The grinding water receiving unit may have a bottomed water receiving plate (for example, a water receiving plate 155B) that receives the grinding water discharged from the processing device, and a plurality of coupling members (for example, coupling members 162B) for coupling the water receiving plate and the dehydration tank. In this case, the discharge opening may be formed between the plurality of coupling members. Further, the coupling member may be integrally formed with the dehydration tank and the grinding water receiving unit.

For example, in a case where the grinding water introducing unit has a grinding water receiving unit, the dehydration tank has a two-stage structure including a first side wall (for example, a first side wall 211BaA) provided at a lower part of the dehydration tank and a second side wall (for example, a second side wall 211BaB) provided above the first side wall. For example, the first side wall may have a cylindrical surface or a conical surface of which the upper diameter is smaller than the lower diameter, the second side wall may have a conical surface of which the upper diameter is smaller than the lower diameter, and the angle formed by the conical surface of the second side wall with respect to the vertical direction may be larger than the angle formed by the cylindrical surface or the conical surface of the first side wall with respect to the vertical direction. In this case, the discharge opening may be positioned above the first side wall. For example, the discharge opening may be positioned between the heights of the conical surface of the second side wall.

The water receiving unit includes a region for receiving water that has passed through the filter of the dehydration tank. The water receiving unit is disposed below the filter. For example, the water receiving unit includes a drainage hole (for example, a drainage hole <NUM>) for storing the water that has passed through the filter and discharging the water to a tank (for example, a tank <NUM>) for storing the grinding water. For example, the water receiving unit may be disposed at least in a region other than the region of a part where the processing chips scraped out by the scraping mechanism unit pass through the opening. For example, the water receiving unit is disposed outside the opening for allowing the processing chips to pass therethrough.

For example, the wash water injection unit has a nozzle (for example, a nozzle <NUM>) for ejecting wash water toward the filter of the dehydration tank. For example, the wash water injection unit is driven after the processing chips of the dehydration tank are scraped out by the scraping unit. Accordingly, the clogging of the filter is eliminated and the grinding water can be treated well.

For example, the wash water injection unit may include a tank into which the wash water enters is supplied, in addition to the tank in which the grinding water is stored. In this case, regarding the wash water in the tank, by driving the pump, the wash water is pumped up from the tank, and the wash water is injected from the nozzle.

For example, the nozzle is provided at a position where the wash water is ejected from below the filter. In this case, the tip end port of the nozzle may be provided so as to eject the wash water in the diagonally downward direction with respect to the filter at a position avoiding the position where the water that has passed through the filter is dropped. Accordingly, it is possible to suppress the direct entrance of the water that has passed through the filter into the tip end port of the nozzle when the wash water is not injected, and it is possible to suppress the clogging of the nozzle due to the fine processing chips that have passed through the filter. In addition, the mechanism for suppressing the clogging of the nozzle is not limited thereto. For example, the nozzle may be provided with a mechanism which is positioned at the retracted position that is not affected by the water that has passed through the filter during non-washing, and moves from the retracted position to the injection position where the wash water can be ejected toward the filter during the washing. Otherwise, the nozzle may be provided inside the dehydration tank. In this case, the nozzle injects the wash water from above the filter.

For example, the holding unit of the rotation shaft for rotating the dehydration tank and the rotation transmission mechanism may be disposed at the upper portion of the dehydration tank, and the moving mechanism for moving the scraper of the scraping unit may also be disposed at the upper portion of the dehydration tank. Furthermore, the grinding water introduction pipe may be inserted from the upper portion of the dehydration tank. In other words, in this case, these components are not disposed below the opening provided at the bottom portion of the dehydration tank. Therefore, these components do not hinder the ejection of the processing chips, and the processing chips can be treated well.

It is needless to say that the arrangement of the holding unit of the rotation shaft and the rotation transmission mechanism is not limited thereto, and the rotation transmission mechanism may be disposed below the dehydration tank. The moving mechanism for moving the scraper may be disposed inside or at the lower portion of the dehydration tank. In this case, a coupling member for coupling the dehydration tank can be provided at the upper portion of the rotation shaft of the dehydration tank. Accordingly, accumulation of the processing chips that are dropped when the scraper of the scraping unit is operated on the coupling member for coupling the dehydration tank is avoided, and the processing chips can be easily processed.

For example, the notification unit is provided to notify the operator of various types of information. For example, the notification unit notifies an error of the grinding water treatment device, work information necessary for the operator, and the like. For example, the notification unit may also be used as a monitor (for example, a monitor <NUM>) which is an example of a display unit provided in the processing device. Accordingly, even in a case where the centrifugal separator is accommodated inside the table, the necessary information can be notified to the operator by using the display unit which is an example of the notification unit of the processing device. For example, the notification unit is provided to notify the operator of the status in a case where the centrifugal separator does not operate normally. According to this, when the centrifugal separator does not operate normally, the operator is required to take action, and thus, the processing chips can be treated well.

Examples of the present disclosure will be described with reference to the drawings.

<FIG> is a view illustrating a schematic configuration of the whole of an eyeglasses lens processing apparatus according to the first example. The eyeglasses lens processing apparatus includes a processing device <NUM> of an eyeglasses lens and a grinding water treatment device <NUM>. For example, the processing device <NUM> is placed on the table <NUM>, and the grinding water treatment device <NUM> is disposed under the table <NUM>.

A processing mechanism unit <NUM> is disposed inside the housing of the processing device <NUM>. The processing mechanism unit <NUM> is substantially configured with lens chuck shafts (lens rotating shafts) 2R and <NUM>, a carriage unit <NUM>, a grindstone <NUM> which is an example of a machining tool, and the like. The lens chuck shafts (lens rotating shafts) 2R and <NUM> hold and rotate a lens LE for eyeglasses. The carriage unit <NUM> moves the lens chuck shafts 2R and <NUM> relative to the grindstone <NUM>. The grindstone <NUM> is attached to a rotation shaft <NUM> and is rotated by the rotation shaft <NUM>. Further, a lens refractive surface shape measuring unit <NUM> is disposed inside the processing device <NUM>. The lens refractive surface shape measuring unit <NUM> measures the shape of the refractive surface (front surface and rear surface of the lens) of the lens LE held by the lens chuck shafts 2R and <NUM>. In addition, for the configuration of the processing mechanism unit <NUM> and the lens refractive surface shape measuring unit <NUM>, for example, the description of <CIT> is incorporated, and detailed description thereof will be omitted.

At the time of peripheral processing of the lens LE, the grinding water is injected from a nozzle <NUM> to the grinding part of the lens LE and the grindstone <NUM>, and the grinding unit of the grindstone <NUM> is cooled. Further, the processing chips generated during the processing is washed away to the bottom portion of a processing chamber <NUM> by the grinding water. A drainage hose <NUM> for discharging the grinding water containing processing chips are connected to the bottom portion of the processing chamber <NUM>.

The grinding water treatment device <NUM> includes the centrifugal separator <NUM> that separates the grinding water discharged from the processing device <NUM> into processing chips and water. The centrifugal separator <NUM> is provided with the scraping mechanism unit <NUM> for scraping out the past chips accumulated inside the dehydration tank <NUM> (refer to <FIG>) of the centrifugal separator <NUM>. Further, the grinding water treatment device <NUM> includes the water receiving unit <NUM> that receives water separated and discharged by the centrifugal separator <NUM>. In addition, there is also a case where the grinding water is completely separated into the water and the processing chips.

The grinding water treatment device <NUM> may include the wash water injection unit <NUM> for injecting the wash water in order to wash a filter <NUM> (refer to <FIG>) provided in the centrifugal separator <NUM>. Further, the grinding water treatment device <NUM> may include a pump tank unit <NUM> for storing the grinding water supplied to the processing device <NUM>. At the lower portion of the centrifugal separator <NUM>, the chips receiving unit (bucket) <NUM> that receives the processing chips separated and ejected by the centrifugal separator is detachably disposed.

The pump tank unit <NUM> includes the tank <NUM> for storing the grinding water and the pump <NUM> for pumping up the grinding water stored in the tank <NUM>. Water from the water receiving unit <NUM> is charged into the tank <NUM>, and the water separated by the centrifugal separator <NUM> is reused as grinding water. In the present example, the pump tank unit <NUM> is a circulation type in which the grinding water is reused. The grinding water pumped up by the pump <NUM> is guided to the nozzle <NUM> of the processing device <NUM> by the hose <NUM>.

The configuration of the centrifugal separator <NUM> will be described with reference to <FIG>. In addition, <FIG> is a schematic sectional view for describing a configuration of the water receiving unit <NUM> in addition to the centrifugal separator <NUM>.

The centrifugal separator <NUM> includes the dehydration tank <NUM> into which the used grinding water from the processing device <NUM> is introduced. The dehydration tank <NUM> is rotatably supported by the support mechanism <NUM>. For example, the support mechanism <NUM> includes four columns <NUM>, and a top plate <NUM> is fixed to the four columns <NUM>. The dehydration tank <NUM> is disposed below the top plate <NUM>. The holding member <NUM> that rotatably holds the rotation shaft <NUM> of the dehydration tank <NUM> is fixed to the top plate <NUM>. The rotation shaft <NUM> is rotated by a drive source disposed above the dehydration tank <NUM>. For example, the rotation shaft <NUM> is rotated by a motor <NUM> disposed on the top plate <NUM> via a rotation transmission mechanism <NUM>. As the rotation transmission mechanism <NUM>, a mechanism such as a belt, a pulley, or a gear is used.

For example, the dehydration tank <NUM> includes the substantially cylindrical side wall 211a. In the example, the side wall 211a has a conical shape having a larger lower diameter than an upper diameter. The upper wall 211b of the dehydration tank <NUM> has an annular shape and is integrally connected to the side wall 211a. The holding member <NUM> is disposed through the opening inside the annular upper wall 211b.

The bottom plate <NUM> is attached to the bottom portion of the side wall 211a of the dehydration tank <NUM>. The bottom plate <NUM> configures the bottom portion of the dehydration tank <NUM>. In addition, the bottom plate <NUM> may be detachably attached to the side wall 211a.

<FIG> is a perspective view describing a configuration of the bottom plate <NUM>. The rotation shaft <NUM> is fixed to a center portion 212a of the bottom plate <NUM>. For example, the center portion 212a and the lower end of the rotation shaft <NUM> are fixed. The bottom plate <NUM> is provided with the opening <NUM> for allowing the dropped processing chips scraped out by the scraping mechanism unit <NUM> to pass therethrough and ejecting the processing chips to the outside of the dehydration tank <NUM>. In the present example, four coupling units 212c that couples a peripheral portion 212b and the center portion 212a of the bottom plate <NUM> are formed, and four openings <NUM> are provided therebetween. It is needless to say that the number of coupling units 212c and the number of openings <NUM> are examples, and are not limited thereto. For example, the coupling unit 212c extends in the cross direction. In addition, the peripheral portion 212b becomes a region where processing chips are accumulated in cooperation with the side wall 211a and the upper wall 211b. With such a configuration, the rotation shaft <NUM> is rotated by the motor <NUM>, and accordingly, the dehydration tank <NUM> is also rotated. In addition, the coupling unit 212c may not have to be integrated with the peripheral portion 212b and the center portion 212a, and may be another coupling member for coupling the member of the peripheral portion 212b and the member of the center portion 212a so as to form the opening <NUM>.

The peripheral portion 212b, which is the outer region of the opening <NUM>, is provided with the filter <NUM> for allowing the water separated from the grinding water to pass therethrough by the rotation of the dehydration tank <NUM> and discharging the water to the outside of the dehydration tank <NUM>. In other words, the filter <NUM> is provided between the opening <NUM> for ejecting the processing chips and the side wall 211a of the dehydration tank <NUM>. In the example, four elongated holes 212d are formed in the peripheral portion 212b, and the filter <NUM> is attached to each of the holes 212d. The filter <NUM> may be detachably attached to the bottom plate <NUM>.

For example, as the filter <NUM>, a mesh-like filter that can be used repeatedly is used, but the filter <NUM> is not limited thereto. The filter <NUM> may be a non-woven fabric or may be made of another material. For example, the filter <NUM> may be metal. For example, the filter <NUM> may be a chemical fiber. For example, when the shape of the filter <NUM> is a mesh shape, the processing chips adhering to the filter <NUM> can be efficiently washed. In this case, the filter <NUM> is washed by, for example, the wash water injection unit <NUM> described later. For example, the size of the mesh of the filter <NUM> may be determined according to the size of the processing chips accumulated inside the dehydration tank <NUM> without passing through the filter <NUM>. In addition, by disposing the region of the filter <NUM> so as to extend to the side wall 211a of the dehydration tank <NUM>, water in the vicinity of the side wall 211a will pass through the filter <NUM>. Accordingly, the processing chips accumulated in the dehydration tank <NUM> can be efficiently dehydrated.

The grinding water introduction pipe <NUM> for introducing the grinding water from the processing device <NUM> into the dehydration tank <NUM> passes through the opening of the upper wall 211b of the dehydration tank <NUM>. In other words, the grinding water introduction pipe <NUM> extends inward from the upper portion of the dehydration tank <NUM>. An introduction port 150a of the grinding water introduction pipe <NUM> is arranged on the top plate <NUM>, and the drainage hose <NUM> extending from the processing device <NUM> is connected to the introduction port 150a. An internal pipe 150b of the grinding water introduction pipe <NUM> that enters the inside of the dehydration tank <NUM> is thinner than the introduction port 150a. Further, a tip end pipe 150c further extending from the internal pipe 150b is bent toward an interior side of the side wall 211a such that the grinding water is discharged toward the interior side of the side wall 211a. In other words, a discharge port <NUM> of the grinding water introduction pipe <NUM> is directed toward the interior side of the side wall 211a such that the advancing direction of the grinding water dropped by gravity is oriented toward the interior side of the side wall 211a. Accordingly, the grinding water is directed toward the interior side of the side wall 211a of the dehydration tank <NUM> by utilizing the force of the natural drop of the grinding water without using a pump. In addition, it is possible to suppress the direct entrance of the grinding water discharged from the grinding water introduction pipe <NUM> to the opening <NUM> for ejecting the processing chips. Further, since the cross-sectional area at the discharge port <NUM> is smaller than the cross-sectional area at the introduction port 150a, the force of the grinding water emitted from the discharge port <NUM> and oriented toward the interior side of the side wall 211a is gained, the grinding water is less likely to flow into the opening <NUM> for ejecting the processing chips, and the centrifugal separation by rotation of the dehydration tank <NUM> can be performed efficiently. In addition, it is needless to say that a pump may be provided in order to give a force to the grinding water discharged from the discharge port <NUM>.

Further, the discharge port <NUM> may be arranged on the side wall 211a side of the opening <NUM> for ejecting the processing chips. Accordingly, it is further suppressed that the grinding water enters the opening <NUM>.

Further, as illustrated in <FIG>, the direction of the discharge port <NUM> may not be the normal direction of the side wall 211a, but may be a direction in which the discharged grinding water heads along the rotation direction R of the dehydration tank <NUM>. Accordingly, when the grinding water discharged from the discharge port <NUM> collides with the side wall 211a of the rotating dehydration tank <NUM>, the accumulated processing chips, or the grinding water collected on the side wall 211a side, bouncing and scattering are suppressed. As a result, the entrance of the grinding water into the opening <NUM> for ejecting the processing chips is further suppressed.

Further, the discharge port <NUM> of the grinding water introduction pipe <NUM> is arranged above the center of the dehydration tank <NUM>. Accordingly, the distance until the grinding water discharged from the discharge port <NUM> reaches the bottom plate <NUM> of the dehydration tank <NUM> becomes long, and the grinding water is easily subjected to the centrifugal force due to the rotation of the dehydration tank <NUM>. Accordingly, the processing chips and the water which are mixed with the grinding water can be separated more efficiently.

The scraping mechanism unit <NUM> includes the scraper <NUM> for scraping out the processing chips accumulated on the interior side of the side wall 211a; and the moving mechanism <NUM> for moving the scraper <NUM> between the retracted position and the operating position.

The scraper <NUM> is disposed inside the dehydration tank <NUM>. For example, the scraper <NUM> has a flat plate shape, and the cutting edge portion 601a of the scraper <NUM> is formed in a shape along the interior side of the side wall 211a. In addition, the scraper <NUM> is not limited to a flat plate shape, and may have a shape capable of scraping out the processing chips. A rotation shaft <NUM> extending above the dehydration tank <NUM> is attached to the scraper <NUM>. The rotation shaft <NUM> is rotatably held by a holding unit <NUM> mounted on the top plate <NUM>. Then, the rotation shaft <NUM> is rotated (forward rotation, reverse rotation) by a motor <NUM> via the rotation transmission mechanism (belt, pulley, gear, and the like). The motor <NUM> is attached onto the top plate <NUM>. In the example, the moving mechanism <NUM> is configured with the rotation shaft <NUM>, the holding unit <NUM>, the motor <NUM>, and the like. In addition, the moving mechanism <NUM> of the scraper <NUM> is not limited to the above-described rotation, and may be a linear movement.

For example, the retracted position of the scraper <NUM> is set to be a position where the scraper <NUM> does not hit the side wall 211a and the accumulated processing chips as illustrated by the dotted line in <FIG> when the dehydration tank <NUM> is rotated to centrifugally separate the grinding water and the processing chips. In a case of scraping out the processing chips accumulated on the interior side of the side wall 211a, the scraper <NUM> is moved to the operating position where the cutting edge portion 601a of the scraper <NUM> is pressed against the side wall 211a as illustrated by the solid line in <FIG>.

The water receiving unit <NUM> is disposed under the centrifugal separator <NUM>. The water receiving unit <NUM> is attached to, for example, the column <NUM>. The water receiving unit <NUM> is positioned below the filter <NUM> to receive the water that has passed through the filter <NUM> at the bottom portion of the dehydration tank <NUM>. For example, as the water receiving unit <NUM>, a U-shaped flow path is arranged in an annular shape. For example, the water receiving unit <NUM> is disposed corresponding to the arrangement of the filter. In other words, the water receiving unit <NUM> has a water receiving region capable of receiving the water that passes through the filter <NUM> and is dropped. The water receiving unit <NUM> is disposed outside the opening <NUM>. For example, a side wall 500a on the inside (rotation shaft <NUM> side) of the water receiving unit <NUM> is arranged outside the opening <NUM> formed on the bottom plate <NUM>. Accordingly, the processing chips that pass through the opening <NUM> are prevented from being mixed into the water receiving unit <NUM>. Further, the water that has passed through the filter <NUM> is prevented from flowing into the chips receiving unit <NUM>. Further, the water that has passed through the filter <NUM> can flow into the water receiving unit <NUM>. Further, the upper end of a side wall 500b on the outer side of the water receiving unit <NUM> is provided at a position higher than the bottom portion (bottom plate <NUM>) of the dehydration tank <NUM>. Accordingly, it is possible to suppress the outflow of the water that has passed through the filter <NUM> from the water receiving unit <NUM> to the outside of the centrifugal separator <NUM>.

In addition, regarding the arrangement of the water receiving unit <NUM>, the water receiving unit <NUM> may be disposed in a region for receiving water that has passed through the filter <NUM>, that is, at least in a region other than the region where the processing chips scraped out by the scraping mechanism unit <NUM> pass through the opening <NUM>. For example, the processing chips scraped out by the scraping mechanism unit <NUM> are mainly ejected from the vicinity of the position where the scraper <NUM> is disposed in the opening <NUM>. Therefore, for example, at a position (for example, <NUM>° opposite to the operating position of the scraper <NUM>) away from the scraper <NUM>, the water receiving unit <NUM> may be disposed at the part of the opening <NUM> outside the region through which the processing chips pass. Accordingly, while the entrance of the processing chips scraped out by the scraping mechanism unit <NUM> into the water receiving unit <NUM> is suppressed, the entrance of the grinding water introduced from the discharge port <NUM> of the grinding water introduction pipe <NUM> into the chips receiving unit <NUM> can be suppressed.

A drainage hole <NUM> for draining water is provided at a part of the bottom surface <NUM> of the water receiving unit <NUM>. The water that has entered the water receiving unit <NUM> flows into the tank <NUM> from the drainage hole <NUM> through the flow path <NUM>.

In addition, the bottom surface <NUM> of the water receiving unit <NUM> may be inclined toward the drainage hole <NUM>. For example, the bottom surface <NUM> of the water receiving unit <NUM> is inclined such that <NUM> degrees opposite side of the drainage hole <NUM> is the highest. Accordingly, the grinding water flowing into the water receiving unit <NUM> can be efficiently drained from the drainage hole <NUM>.

The wash water injection unit <NUM> is provided in the grinding water treatment device <NUM> for washing the filter <NUM> disposed at the bottom portion of the dehydration tank <NUM>. In <FIG>, the wash water injection unit <NUM> includes a tank <NUM> for storing wash water; a pump <NUM> for suctioning wash water; the nozzle <NUM> for injecting the wash water toward the filter <NUM> (refer to <FIG>); and a pipe <NUM> that couples the pump <NUM> and the nozzle <NUM>.

The nozzle <NUM> is provided at a position where the wash water is ejected from below the filter <NUM>. In the example, the nozzle <NUM> is installed on the side wall 500b on the outside of the water receiving unit <NUM>. The tip end port of the nozzle <NUM> is directed toward the filter <NUM> (that is, the bottom portion of the dehydration tank <NUM>). In addition, the tip end port of the nozzle <NUM> may be provided so as to eject the wash water in the diagonally downward direction with respect to the filter <NUM> at a position avoiding the position where the water that has passed through the filter <NUM> is dropped. In this case, it is suppressed that the water that has passed through the filter <NUM> directly enters the tip end port of the nozzle <NUM> when the wash water is not injected. Accordingly, it is possible to suppress the clogging of the nozzle <NUM> due to fine processing chips that have passed through the filter <NUM>. The mechanism for suppressing the clogging of the nozzle <NUM> is not limited to this. For example, the nozzle <NUM> may be provided with a mechanism which is positioned at the retracted position that is not affected by the water that has passed through the filter <NUM> during non-washing, and moves to the injection position where the wash water can be ejected toward the filter <NUM> during the washing. Otherwise, the nozzle <NUM> may be provided inside the dehydration tank <NUM>. In this case, the nozzle <NUM> injects the wash water from above the filter <NUM>. For example, the nozzle <NUM> may be attached to a member such as the scraper <NUM> or the like inside the dehydration tank <NUM>.

At the time of washing the filter <NUM>, the wash water stored in the tank <NUM> is suctioned by the pump <NUM> and injected from the nozzle <NUM> toward the filter <NUM> via the pipe <NUM>. Accordingly, the clogging of the filter <NUM> is eliminated. In addition, the wash water may be tap water, and the pipe <NUM> may be connected to a water pipe instead of the tank <NUM>.

Below the opening <NUM>, the chips receiving unit <NUM> that receives the processing chips scraped out by the scraping mechanism unit <NUM> is detachably provided. For example, the chips receiving unit <NUM> has a size capable of accommodating an amount larger than the amount of the processing chips that can be accumulated in the dehydration tank <NUM>. Accordingly, the frequency of the work (disposal work) of taking out the processing chips performed by the operator can be reduced, and the troublesome of the operator can be alleviated. Further, a bag may be disposed in the chips receiving unit <NUM>. Accordingly, the operator can dispose of the processing chips collected inside the bag together for each of the bags, and the burden on the operator can be reduced.

<FIG> is a block diagram of a control system in the present example. The eyeglasses lens processing apparatus according to the present disclosure includes the processing device <NUM> and a control unit <NUM> for controlling the operation of the grinding water treatment device <NUM>. It is needless to say that a control unit that controls the operation of the processing device <NUM> and a control unit that controls the operation of the grinding water treatment device <NUM> may be provided separately. The control unit <NUM> is coupled to each of the drive source included in the processing mechanism unit <NUM> of the processing device <NUM> and the lens refractive surface shape measuring unit <NUM>. Further, the control unit <NUM> is coupled to each of the drive sources (the pump <NUM>, motor <NUM>, motor <NUM>, and pump <NUM>) included in the grinding water treatment device <NUM>. Further, the control unit <NUM> is coupled to the monitor <NUM> used as an example of the notification unit.

The grinding water treatment device <NUM> may include the monitor <NUM> used as an example of the notification unit notifying the operator of various types of information. The monitor <NUM> is connected to the control unit <NUM> (refer to <FIG>). For example, in a case where the centrifugal separator <NUM> does not operate normally due to oscillation or the like, the control unit <NUM> can notify the operator of an error through the monitor <NUM> and request a response.

In the present example, the monitor <NUM> is also used as a monitor provided as the notification unit (and an input unit) in the processing device <NUM>. It is needless to say that the notification unit may not be shared with the notification unit provided in the processing device <NUM>, but may be provided separately.

In addition, the monitor <NUM> is an example of a member for notifying the operator, and is not limited thereto. For example, the notification unit may be a speaker. In this case, the grinding water treatment device <NUM> notifies the operator of the error by the voice of the speaker. Further, for example, the notification unit may be a lamp. In this case, the grinding water treatment device <NUM> notifies the operator of the error by lighting the lamp. Furthermore, the notification unit may be communication means with an external device such as a computer. In this case, the grinding water treatment device <NUM> notifies the operator of the error by the communication external device.

Further, for example, the control unit <NUM> may notify the operator of an instruction via the notification unit. For example, the control unit <NUM> may instruct the operator via the monitor <NUM> to take out the processing chips from the chips receiving unit <NUM> when the lens is processed by the processing device <NUM> a predetermined number of times.

The operations of the processing device and the grinding water treatment device having the above-described configuration will be described. When the lens LE is held by the lens chuck shafts 2R and <NUM> and the operation start signal of the processing device <NUM> is input, the control unit <NUM> first operates the lens refractive surface shape measuring unit <NUM> based on the previously acquired target lens shape, and measures the refractive surface shape of the lens LE. When the measurement of the refractive surface shape of the lens LE is completed, the control unit <NUM> then drives the pump <NUM> to control the drive of the carriage unit <NUM> while injecting the grinding water from the nozzle <NUM>, and the peripheral edge of the lens LE is ground by the grindstone <NUM>. The grinding water containing processing chips generated by processing the lens LE is guided to the centrifugal separator <NUM> by the drainage hose <NUM> connected to the bottom portion of the processing chamber <NUM>.

Here, the control unit <NUM> drives the motor <NUM> so as to rotate the dehydration tank <NUM> of the centrifugal separator <NUM> at high speed based on a predetermined operation signal of the processing device <NUM> before supplying the grinding water (before driving the pump <NUM>). Since the dehydration tank <NUM> is rotated at high speed before the grinding water from the processing device <NUM> flows into the dehydration tank <NUM>, it is possible to reduce the inflow of the grinding water into the opening <NUM> for ejecting the processing chips. For example, as a predetermined operation signal, a trigger signal for starting the processing of the processing device <NUM> can be used. It is needless to say that the measurement start signal or the measurement end signal of the lens LE by the lens refractive surface shape measuring unit <NUM> may be used. Otherwise, as a predetermined operation signal, a signal for holding the lens LE on the lens chuck shafts 2R and <NUM> may be used.

The grinding water from the drainage hose <NUM> flows into the introduction port 150a of the grinding water introduction pipe <NUM>, is guided to the inside of the dehydration tank <NUM> via the internal pipe 150b and the tip end pipe 150c, and is discharged from the discharge port <NUM> toward the interior side of the side wall 211a of the dehydration tank <NUM>. In the present example, the grinding water introduction pipe <NUM> is provided such that the grinding water discharged from the discharge port <NUM> is oriented toward the interior side of the side wall 211a. Further, the discharge port <NUM> may be arranged on the side wall 211a side of the opening <NUM>. Accordingly, it is suppressed that the grinding water directly enters the opening <NUM> provided on the bottom plate <NUM>. Furthermore, since the cross-sectional area at the discharge port <NUM> is smaller than the cross-sectional area at the introduction port 150a, the force of the grinding water oriented toward the interior side of the side wall 211a is gained to suppress the entrance of the grinding water into the opening <NUM>.

Further, since the discharge port <NUM> is directed in a direction in which the discharged grinding water heads along a rotation direction R of the dehydration tank <NUM> (refer to <FIG>), bouncing and scattering are suppressed in a case where the grinding water discharged from the discharge port <NUM> collides with the side wall 211a, the accumulated processing chips and the like. Accordingly, it is further suppressed that the grinding water enters the opening <NUM>.

In addition, a shutter that can be opened and closed may be provided between the opening <NUM> and the upper portion of the chips receiving unit <NUM>. In this case, the shutter is closed except when the processing chips are removed by the scraping mechanism unit <NUM>, and accordingly, it is possible to suppress the inflow of the grinding water into the chips receiving unit <NUM> from the opening <NUM>.

The grinding water containing the processing chips introduced into the dehydration tank <NUM> is separated into the processing chips and water by the centrifugal force caused by the high-speed rotation of the dehydration tank <NUM>. In a case where the processing chips contained in the grinding water is heavier than water, as illustrated in <FIG>, the processing chips and water are separated such that the processing chips are accumulated first on the side wall 211a side and the water is positioned on the inside (rotation shaft <NUM> side). In <FIG> and <FIG>, PW indicates processing chips and GW indicates separated water.

Here, in a case where the filter <NUM> is not provided on the peripheral portion 212b of the bottom plate <NUM>, when the rotation of the dehydration tank <NUM> stops (or when the dehydration tank <NUM> rotates at low speed), the water collected inside the dehydration tank <NUM> flows out from the opening <NUM> positioned inside the peripheral portion 212b and flows into the chips receiving unit <NUM>.

On the other hand, in the present disclosure, by providing the filter <NUM> on the peripheral portion 212b of the bottom plate <NUM>, it is suppressed that the water collected inside the dehydration tank <NUM> passes through the filter <NUM>, is discharged to the outside of the dehydration tank <NUM>, and enters the opening <NUM>. In the present example, the water that has passed through the filter <NUM> enters the water receiving unit <NUM> provided outside the opening <NUM> and is reused as grinding water.

Further, it has been newly found by the present inventor that there is a case where it is difficult to separate the processing chips and water depending on the material of the lens LE, and the processing chips are lighter than water. The processing chips lighter than water are generated, for example, in a case where the material of the lens LE is thermoplastic such as polycarbonate. Polycarbonate is heavier than water in a state before processing, but it is considered that the processing chips ground by the grindstone <NUM> are softened by the heat during processing and contain air, and are lighter than water. In a case where the processing chips are lighter than water, water (including a case of grinding water in which the processing chips are not completely separated) is positioned on the side wall 211a side as illustrated in <FIG> by centrifugal separation by rotation of the dehydration tank <NUM>, and the processing chips will be positioned inside (the rotation shaft <NUM> side).

Here, similar to the description above, in a case where the filter <NUM> is not provided on the peripheral portion 212b of the bottom plate <NUM>, when the rotation of the dehydration tank <NUM> stops (or when the dehydration tank <NUM> rotates at low speed), the processing chips flow out from the opening <NUM> together with the water collected inside the dehydration tank <NUM>. In other words, the grinding water containing the processing chips that have not been centrifugally separated flows into the chips receiving unit <NUM>.

On the other hand, in the present disclosure, by providing the filter <NUM> on the peripheral portion 212b of the bottom plate <NUM>, the water positioned further on the side wall 211a side than the processing chips passes through the filter <NUM> and is discharged to the outside of the dehydration tank <NUM>. Accordingly, only the processing chips are accumulated inside the dehydration tank <NUM>.

The control unit <NUM> does not stop the rotation of the dehydration tank <NUM> immediately after the processing of the lens LE is completed and the supply of the grinding water from the nozzle <NUM> is stopped, but the drive of the motor <NUM> is stopped after a certain period of time after the processing of the lens LE is completed, and the rotation of the dehydration tank <NUM> is stopped. Even after the processing of the lens LE is completed, the dehydration tank <NUM> is rotated to promote the dehydration of the processing chips accumulated inside the dehydration tank <NUM>.

The processing chips accumulated inside the dehydration tank <NUM> are ejected from the dehydration tank <NUM> by operating the scraping mechanism unit <NUM> by the control unit <NUM>. In addition, the control unit <NUM> does not operate the scraping mechanism unit <NUM> every time the processing of one lens LE is completed, but may operate the scraping mechanism unit <NUM> when the processing amount of the lens LE reaches a predetermined reference. Accordingly, the processing of the plurality of lenses LE can be continuously and efficiently performed. In addition, the predetermined reference of the processing amount is determined based on, for example, at least one of the number of processed lenses LE, the processing time of the lens LE, and the amount of grinding water used. It is needless to say that the predetermined reference of the processing amount is not limited to these, and various information can be used. In addition, in a case where the control unit <NUM> is provided separately from the control unit of the processing device <NUM>, information from the control unit of the processing device <NUM> is transmitted to the control unit <NUM>.

When the processing amount of the lens LE reaches a predetermined reference, the control unit <NUM> drives the motor <NUM> such that the rotation speed of the dehydration tank <NUM> is lower than the rotation speed at the time of centrifugal separation of the grinding water. Further, the control unit <NUM> drives the motor <NUM> and moves the scraper <NUM> placed at the retracted position to the operating position (the position where the cutting edge portion 601a is in contact with the side wall 211a) (refer to <FIG>). In a state where the scraper <NUM> is positioned at the operating position, the dehydration tank <NUM> is rotated a plurality of times or for a certain period of time, and accordingly, the processing chips accumulated on the interior side of the side wall 211a are scraped off by the scraper <NUM> and dropped, and are ejected to the outside of the dehydration tank <NUM> from the opening <NUM> provided on the bottom plate <NUM>. The processing chips ejected through the opening <NUM> is received by the chips receiving unit <NUM>. In addition, when the work of removing the processing chips accumulated on the interior side of the side wall 211a is completed, the control unit <NUM> controls the drive of the motor <NUM> and moves the scraper <NUM> to the retracted position.

In addition, the control unit <NUM> may control the operation of the processing device <NUM> in a case where the processing chips are removed by the grinding water treatment device <NUM>. For example, while the processing chips are being removed, the lens processing operation of the processing device <NUM> may be stopped such that the grinding water does not flow into the dehydration tank <NUM>. In this case, the control unit <NUM> may notify the operator via the monitor <NUM> that the processing chips are being removed.

As described above, the processing chips accumulated inside the dehydration tank <NUM> are automatically ejected to the outside of the dehydration tank <NUM> by the control unit <NUM> operating the scraping mechanism unit <NUM>, and thus, there is no troublesome for the operator to take out the processing chips. Further, the scraping time of the processing chips by the operation of the scraping mechanism unit <NUM> may be shorter than the processing time of one lens LE. Accordingly, the processing efficiency of the lens LE is not significantly reduced even in the continuous processing of the lens LE at the processing center (lens processing factory that concentrates the processing of eyeglasses lenses). Further, since the amount of the processing chips that can be stored in the chips receiving unit <NUM> can be larger than the amount of the processing chips accumulated in the dehydration tank <NUM>, the operator can efficiently dispose of the processing chips collectively without increasing the size of the dehydration tank <NUM>.

The control unit <NUM> operates the wash water injection unit <NUM> after removing the processing chips accumulated in the dehydration tank <NUM> by the scraping mechanism unit <NUM>. The control unit <NUM> rotates the dehydration tank <NUM> while driving the pump <NUM> to inject the wash water from the nozzle <NUM> toward the filter <NUM>. For example, the control unit <NUM> rotates the dehydration tank <NUM> a plurality of times or for a certain period of time. Accordingly, even in a case where the filter <NUM> is clogged with the processing chips, the clogging of the filter <NUM> is eliminated and the filter <NUM> can be used repeatedly.

In addition, the operation of the wash water injection unit <NUM> was not executed each time the processing chips in the dehydration tank <NUM> was removed by the scraping mechanism unit <NUM>, but the operation of the scraping mechanism unit <NUM> may be performed a plurality of times. In this case, since the time for stopping the lens processing by the processing device <NUM> by the operation of the wash water injection unit <NUM> is reduced, the lens LE can be efficiently processed at the processing center.

In the operation of the grinding water treatment device <NUM> as described above, in a case where the centrifugal separator <NUM> does not operate normally due to oscillation or the like, the control unit <NUM> displays an error on the monitor <NUM> and notifies the operator of the abnormality of the centrifugal separator <NUM>. In this case, the monitor <NUM> included in the processing device <NUM> may also be used. In a case where the centrifugal separator <NUM> is accommodated inside the table <NUM>, the operator usually does not directly observe the centrifugal separator <NUM> while the centrifugal separator <NUM> is in operation. Therefore, there is a case where the operator does not notice the abnormality of the centrifugal separator <NUM>. The processing device <NUM> is mounted on the table <NUM>, and the operator can observe the monitor <NUM> of the processing device <NUM> even while the centrifugal separator <NUM> is in operation. Accordingly, the operator can easily know the abnormality of the centrifugal separator <NUM>.

The second example is an example in which the grinding water introduction unit is mainly different from that of the first example. In the second example, due to the different configuration of the grinding water introduction unit, the dehydration tank <NUM> of the centrifugal separator <NUM> of the first example, the mechanism for rotating the dehydration tank <NUM>, the scraping mechanism unit <NUM>, and the like have a partially different configuration. Hereinafter, the grinding water treatment device according to the second example will be described with reference to <FIG>, <FIG>, and <FIG>. In addition, the components having the same functions as those in the first example will be given the same reference numerals, and the detailed description thereof will be omitted. Further, in the following, the differences from the first example will be mainly described.

<FIG> is a view describing a configuration of the grinding water treatment device <NUM> according to the second example. The dehydration tank 211B of the centrifugal separator 210B included in the grinding water treatment device <NUM> is rotatably supported by the support mechanism <NUM>. The base 206B is fixed to the four columns <NUM> of the support mechanism <NUM>. The dehydration tank 211B is rotated by the rotation unit 217B. The rotation unit 217B includes the rotation shaft 215B of the dehydration tank 211B and the motor <NUM> (refer to <FIG>) as an example of a drive source. The rotation shaft 215B is rotatably held by the holding member 216B. The holding member 216B is disposed on the base 206B and fixed to the base 206B. The rotation shaft 215B is rotated by the motor <NUM> (the motor <NUM> is not illustrated in <FIG>) attached under the base 206B.

The side wall 211Ba of the dehydration tank 211B has the lower first side wall 211BaA and the 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 of which the upper diameter is smaller than the lower diameter. The second side wall 211BaB has a conical surface of which the upper diameter is smaller than the lower diameter. In addition, an angle β formed by the conical surface of the second side wall 211BaB with respect to the vertical direction is larger than an 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 formed at <NUM> to <NUM> degrees, and the angle β is formed at <NUM> to <NUM> degrees. In addition, the upper end of the first side wall 211BaA and the lower end of the second side wall 211BaB are formed so as to be continuously connected with the same diameter so as not to cause a step. The upper wall 211Bb of the dehydration tank 211B is formed on the second side wall 211BaB.

Similar to the first example, a bottom plate 212B is attached to the bottom portion of the side wall 211Ba. The bottom plate 212B is provided with the opening <NUM> for ejecting the processing chips scraped out by the scraping mechanism unit 600B to the outside of the dehydration tank 211B. In addition, in the centrifugal separator 210B of the second example, the coupling member 162B (details will be described later) for coupling the rotation shaft 215B and the dehydration tank 211B is provided on the upper portion of the rotation shaft 215B. Therefore, the bottom plate 212B omits the center portion 212a of the bottom plate <NUM> and the four coupling units 212c illustrated in <FIG> (the explanatory view of the bottom plate 212B is omitted, and <FIG> is used). Since the bottom plate 212B does not have the coupling unit 212c, it is possible to avoid the inconvenience that the processing chips that are dropped when the processing chips are scraped out by the scraping mechanism unit 600B are accumulated on the coupling unit 212c.

On the bottom plate 212B, similar to <FIG>, the peripheral portion 212b, which is the outer region of the opening <NUM>, is provided with the filter <NUM> for allowing the water separated from the grinding water to pass therethrough by the rotation of the dehydration tank <NUM> and discharging the water to the outside of the dehydration tank <NUM>.

In addition, in the second example, since the motor <NUM> for rotating the rotation shaft 215B and the rotation transmission mechanism (not illustrated) are attached under the dehydration tank 211B, a waterproof cover (not illustrated) is disposed thereon. Further, the base 206B is provided with a hole 207B for allowing the processing chips that are dropped to pass therethrough when the processing chips are scraped out by the scraping mechanism unit 600B.

On the rotation shaft 215B of the dehydration tank 211B, the grinding water receiving unit 153B that configures the grinding water introduction unit 150B for introducing the grinding water from the processing device <NUM> into the dehydration tank 211B is disposed. The grinding water receiving unit 153B is disposed inside the dehydration tank 211B, and is rotated in the same direction as the dehydration tank 211B by the rotation unit 217B. In the second example, the rotation unit 217B is shared with the rotation unit that rotates the dehydration tank 211B. The rotation unit 217B rotates the grinding water receiving unit 153B integrally with the dehydration tank 211B. On the outer periphery of the grinding water receiving unit 153B, the discharge opening 160B for discharging the grinding water toward an interior side of the side wall 211Ba (in the example, the second side wall 211BaB) of the dehydration tank 211B is provided.

Above the grinding water receiving unit 153B, an introduction port 150Ba for introducing the grinding water discharged from the processing device <NUM>, that is, an introduction port 150Ba attached to a top plate 205B is provided. The top plate 205B is fixed to the four columns <NUM>. The drainage hose <NUM> extending from the processing device <NUM> is connected to the introduction port 150Ba. For example, the introduction port 150Ba is a circular pipe and is arranged concentrically with the rotation shaft 215B. Further, a lid member 214B is attached onto the upper wall 211Bb of the dehydration tank 211B. The lid member 214B is formed with a hole into which the introduction port 150Ba is inserted, and is rotated together with the dehydration tank 211B. The lid member 214B reduces the outflow of the grinding water from the top of the dehydration tank 211B when the grinding water is introduced into the grinding water receiving unit 153B from the introduction port 150Ba. In addition, the lid member 214B may be integrally formed with the upper wall 211Bb.

<FIG> and <FIG> are views describing a configuration of the grinding water receiving unit 153B. <FIG> is a view in the vicinity of the grinding water receiving unit 153B in <FIG>, and <FIG> is a sectional view taken along the line A-A of <FIG> (sectional view seen from above). For example, the grinding water receiving unit 153B includes the bottomed water receiving plate 155B that receives the grinding water charged from the introduction port 150Ba. The water receiving plate 155B is attached onto the rotation shaft 215B. The water receiving plate 155B is rotated together with the rotation shaft 215B, and accordingly, the water receiving plate 155B is rotated integrally with the dehydration tank 211B. For example, the water receiving plate 155B is formed in a disk shape concentric with the rotation shaft 215B. Further, the height of the upper surface (surface receiving the grinding water) of the water receiving plate 155B is positioned above the first side wall 211BaA and between the heights of the second side wall 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. Accordingly, the grinding water charged on the upper surface of the water receiving plate 155B is oriented toward the second side wall 211BaB when the grinding water is emitted from the water receiving plate 155B by the centrifugal force (detailed operation will be described later).

Further, for example, the water receiving plate 155B is formed in a disk shape having a diameter larger than the diameter of the introduction port 150Ba. In addition, the introduction port 150Ba is positioned on the water receiving plate 155B, and it is sufficient that the grinding water discharged from the processing device <NUM> can be introduced onto the water receiving plate 155B, and may not necessarily be arranged concentrically with the rotation shaft 215B. Further, the upper surface shape of the water receiving plate 155B is not limited to the horizontal plane shape. For example, the upper surface shape of the water receiving plate 155B may be a conical surface shape having a convex center portion. For example, the inclination of the conical surface with respect to the horizontal direction may be <NUM> degrees or less, and preferably <NUM> to <NUM> degrees. In this case, it is possible to suppress that the grinding water flowing from the introduction port 150Ba hits the conical surface of the water receiving plate 155B and is bounced and scattered upward, and the grinding water is easily directed in the lateral direction due to the action of the centrifugal force.

Further, the centrifugal separator 210B is provided with the coupling member 162B for coupling the rotation shaft 215B and the dehydration tank 211B in order to rotate the dehydration tank 211B integrally with the rotation shaft 215B. In the second example, a plurality (for example, four) of coupling members 162B for coupling the water receiving plate 155B and the dehydration tank 211B are provided between the water receiving plate 155B and the dehydration tank 211B. In other words, in the disclosure of the second example, the dehydration tank 211B and the water receiving plate 155B are rotated integrally with the rotation shaft 215B with the water receiving plate 155B interposed therebetween. In the disclosure of <FIG>, <FIG>, and <FIG>, the coupling member 162B is provided at a position where the upper surface of the water receiving plate 155B and the upper wall 211Bb (which may further include the second side wall 211BaB) are coupled. In addition, the discharge opening 160B for discharging the grinding water toward the interior side of the side wall 211Ba is formed between each of the plurality of coupling members 162B. In the disclosure of <FIG>, <FIG>, and <FIG>, the discharge opening 160B is provided so as to emit the grinding water in the horizontal direction, but may be provided so as to emit the grinding water in the diagonally upward direction.

The scraping mechanism unit 600B includes the scraper <NUM> for scraping out the processing chips accumulated on the interior side of the side wall 211Ba. The moving mechanism 602B for moving the scraper <NUM> between the retracted position and the operating position uses the rotary moving mechanism in the first example, but uses the linear moving mechanism in the second example. The moving mechanism 602B is attached to the holding member 216B inside the dehydration tank 211B, and by linearly moving two support members 607B supporting the scraper <NUM> in the horizontal direction, the scraper <NUM> is moved between the retracted position and the operating position. The moving mechanism 602B includes the motor <NUM> (refer to <FIG>) which is an example of a drive source for moving the support member 607B.

In addition, similar to the first example, the chips receiving unit (bucket) <NUM> for receiving the processing chips is detachably disposed at the lower portion of the centrifugal separator <NUM>. In the second example, the base 206B to which the holding member 216B is fixed is disposed between the centrifugal separator <NUM> and the chips receiving unit <NUM>, but the hole 207B for allowing the processing chips to pass therethrough may be formed on the base 206B so as to correspond to the retracted position and the operating position of the scraper <NUM>.

The operation of the grinding water treatment device according to the second example will be described. Here, the operation of the points different from those of the first example will be mainly described.

The grinding water from the processing device <NUM> is introduced (charged) into the grinding water receiving unit 153B from the introduction port 150Ba via the drainage hose <NUM>. In addition, before the grinding water is introduced into the grinding water receiving unit 153B, the water receiving plate 155B of the grinding water receiving unit 153B is rotated at high speed together with the dehydration tank 211B based on a predetermined operation signal of the processing device <NUM>. The grinding water introduced from the introduction port 150Ba is received by the water receiving plate 155B. At this time, since the water receiving plate 155B is rotated in the same direction as the dehydration tank <NUM>, the centrifugal force also acts on the grinding water received by the water receiving plate 155B, and the grinding water is sprinkled in the radial direction. Then, the grinding water is repelled from the discharge opening 160B and is vigorously discharged (emitted) to the outside of the grinding water receiving unit 153B, and at the same time, a force acts on the grinding water in the rotation direction of the water receiving plate 155B. In other words, in a case where the water receiving plate 155B is rotated integrally with the dehydration tank <NUM>, substantially the same rotational force acts on the grinding water discharged from the discharge opening 160B in the same rotation direction as the rotation of the dehydration tank 211B. The water receiving plate 155B is rotated at high speed at the same rotation speed as the dehydration tank 211B for separating the grinding water into processing chips and water, and accordingly, the grinding water is discharged from the discharge opening 160B at speed faster than the falling speed due to gravity in the first example.

Here, in the grinding water introduction unit 150B of the second example, as described above, substantially the same rotational force acts on the grinding water discharged from the discharge opening 160B in the same direction as the rotation of the dehydration tank 211B. Therefore, when the grinding water collides with the side wall 211Ba (the wall of the grinding water collected in the side wall 211a) that is rotated at high speed, the generation of splashes of the grinding water is further suppressed with respect to the configuration of the grinding water introduction pipe <NUM> of the first example. In addition, by suppressing the generation of splashes of the grinding water, the possibility that the unfiltered grinding water flows out from the opening <NUM> for ejecting the processing chips is reduced, and the possibility that the grinding water flows into the chips receiving unit <NUM> is also reduced. Further, by suppressing the generation of splashes of the grinding water, the inhibition of the centrifugal separation between the processing chips and water related to the grinding water accumulated on the side wall 211Ba can be further suppressed with respect to the configuration of the first example. Accordingly, the processing chips and water are efficiently centrifugally separated by the dehydration tank 211B.

In addition, furthermore, in an example of the side wall 211Ba of the dehydration tank 211B disclosed in <FIG>, 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. Further, the height of the upper surface (surface receiving the grinding water) of the water receiving plate 155B is positioned above the first side wall 211BaA. Therefore, the grinding water discharged from the discharge opening 160B tends to collide with the second side wall 211BaB. The grinding water that has collided with the second side wall 211BaB flows toward the first side wall 211BaA having a diameter larger than that of the second side wall 211BaB due to the centrifugal force of the dehydration tank 211B. Accordingly, the processing chips and water are also efficiently separated by the dehydration tank 211B, and the processing chips are deposited on the first side wall 211BaA side.

Further, in a case where the amount of grinding water introduced from the introduction port 150Ba is small, in the disclosure of the first example, the force of the grinding water toward the interior side of the side wall 211a side is weak (the speed is slow), and the grinding water tends to fall to the bottom plate <NUM> side. On the other hand, in the grinding water introduction unit 150B of the second example, even in a case where the amount of grinding water is small because the centrifugal force also acts on the grinding water received by the water receiving plate 155B flowing in from the introduction port 150Ba, the force of the grinding water discharged from the discharge opening 160B and blown toward the interior side of the side wall 211Ba is strong (the speed is high), and the grinding water is suppressed from falling directly toward the bottom plate 212B. Accordingly, even in a case where the amount of grinding water is small, the processing chips and water can be efficiently separated by the dehydration tank 211B that is rotated at high speed.

The grinding water collected inside the dehydration tank 211B (the interior side of the side wall 211Ba) is separated into the processing chips and water by the centrifugal force of the dehydration tank 211B. Then, as illustrated in <FIG> and <FIG>, the water separated from the grinding water passes through the filter <NUM> provided at the bottom portion of the dehydration tank 211B and is discharged to the outside of the dehydration tank 211B. Accordingly, only the processing chips are accumulated inside the dehydration tank 211B.

When the processing amount of the lens LE reaches a predetermined reference, the scraping mechanism unit 600B is driven by the control of the control unit <NUM>, and accordingly, the scraper <NUM> placed at the retracted position is moved to the operating position. In this state, as the dehydration tank 211B is rotated, the processing chips accumulated on the interior side of the first side wall 211BaA are scraped off by the scraper <NUM> and dropped, and are ejected to the outside of the dehydration tank 211B from the opening <NUM> provided on the bottom plate 212B.

The grinding water treatment device <NUM> of the second example includes the water receiving unit <NUM> and the wash water injection unit <NUM>, but the operation thereof is basically the same as that of the first example and is omitted.

The arrangement of the coupling member 162B disclosed in <FIG> and <FIG> is not limited to the above as long as the dehydration tank 211B can be rotated integrally with the rotation shaft 215B. For example, the coupling member 162B may be attached to the rotation shaft 215B. Further, the coupling member 162B may be separated from the grinding water receiving unit 153B (water receiving plate 155B). For example, similar to the first example, the coupling member 162B may be provided on the bottom plate 212B of the dehydration tank 211B. In a case where the coupling member 162B is separated from the grinding water receiving unit 153B, the discharge opening 160B can be provided on the entire circumference of the water receiving plate 155B. As illustrated in <FIG> and <FIG>, in a case where the coupling member 162B is provided on the water receiving plate 155B, the coupling member 162B serves as a barrier, and there is a possibility that the grinding chips mixed into the grinding water stay on the water receiving plate 155B. On the other hand, when the discharge opening 160B is provided on the entire circumference of the water receiving plate 155B, it is possible to further reduce the staying of grinding chips on the water receiving plate 155B.

Claim 1:
An eyeglasses lens processing apparatus including a processing device (<NUM>) of an eyeglasses lens and a grinding water treatment device (<NUM>), comprising:
a centrifugal separator (<NUM>, 210B) that includes a dehydration tank (<NUM>, 211B) into which grinding water used in the processing device (<NUM>) of the eyeglasses lens is introduced, and separates the grinding water into water and processing chips by rotation of the dehydration tank;
a scraping unit (<NUM>, 600B) that scrapes out the processing chips accumulated on a side wall inside the dehydration tank;
an opening (<NUM>) provided in the dehydration tank and through which the processing chips scraped out by the scraping unit are ejected to an outside of the dehydration tank;
a filter (<NUM>) provided in an outer region, which is between the opening and the side wall inside the dehydration tank, outside the opening, and through which the water separated from the grinding water by rotation of the dehydration tank passes to allow the processing chips to be present inside the dehydration tank, a water receiving unit (<NUM>) configured to receive water discharged from the dehydration tank (<NUM>, 211B) and positioned below the filter to receive the water that has passed through the filter (<NUM>) at the bottom portion of the dehydration tank (<NUM>, 211B),
wherein the opening is formed at a bottom portion of the dehydration tank such that the dropped processing chips scraped out by the scraping unit pass through the openings, and
the filter is provided at the bottom portion of the dehydration tank in the outer region outside the opening.