JP7173831B2 - Spectacle lens manufacturing apparatus and manufacturing method - Google Patents

Description

The present invention relates to a spectacle lens manufacturing apparatus and manufacturing method.

A spectacle lens manufacturing process includes a spectacle lens cutting process and a polishing process. Specifically, the spectacle lens is a semi-finished lens in which one of both surfaces is optically finished, and is also called a lens material. Both the cutting process and the polishing process are often performed by a spectacle lens processing apparatus. This spectacle lens is held by a holder. Next, this holder is installed in the processing apparatus. Then, at least one of a cutting process and a polishing process (hereinafter referred to as a processing process or simply processing) is performed on the spectacle lens.

As shown in FIG. 1 of Patent Document 1, for example, the holder includes a base and a low-melting-point metal member that are installed in a spectacle lens processing apparatus. This low-melting-point metal member adheres to the base, has a shape that follows the optical surface of the spectacle lens, and has a lower melting point than the base. Hereinafter, the base will be referred to as a fixture. Also, the low-melting-point metal member is preferably made of a low-melting-point alloy, so is referred to as an alloy. When the holder is installed in the processing device, the shape following the optical surface of the spectacle lens in the alloy and the optical surface of the spectacle lens (semi-finished lens) before the processing process are fixed via the protective film. ing.

JP 2010-284761 A

When manufacturing a spectacle lens with a thin center thickness, a spectacle lens with a prism, etc., depending on the specifications (prescription), there are cases where the semi-finished lens (lens material) has a non-circular shape. Such a lens material is also called a Met's product.

1 is a schematic cross-sectional side view of a retainer with lens blank in which the lens blank does not extend beyond the outer edge of the alloy; FIG. Reference numeral 100 is for the lens material, 101 for the protective film, 102 for the alloy, 104 for the holder, and L for the holder with the lens material. Henceforth, these codes may be omitted. This holder is also called the yatoi mentioned above, and plays the role of the base. In other words, the alloy acts as an adhesive by being sandwiched between the eyelet and the lens material.

In the case of the Metz product, that is, the lens material shown in FIG. 1, the shape of the boundary portion with the alloy in plan view has an acute angle. The shape of this lens material is also called a knife edge.

Normally, the lens material is circular in plan view. Also, the lens material usually has a larger diameter than the alloy in plan view. On the other hand, when a lens material that is a Metz product that is not circular in plan view is fixed to the alloy, the alloy protrudes (extends) from the outer edge of the lens material as shown in FIG. When grinding (CG processing) is performed in this state, the alloy fixing the lens material is also ground. In this case, the alloy surface appears on the extension of the ground surface of the lens material in plan view.

After grinding, if the alloy protrudes from the outer edge of the lens material in plan view, the alloy may adhere to the polishing pad during subsequent polishing. If this happens, alloy shavings will be generated during polishing, and there is a risk that the shavings will damage the lens material.

An object of one embodiment of the present invention is to provide a technique for suppressing the generation of shavings from a low-melting-point metal member (alloy).

The present invention has been devised to achieve the above objects. Specifically, an alloy melting section is provided as part of the device configuration. Then, it is assumed that when the holder with the lens material is viewed from the lens material side, the alloy extends outward beyond the outer edge of the lens material. Then, while rotating the holder with the lens material, the alloy fixed to the lens material is brought into contact with the alloy dissolving portion to melt the alloy. At that time, the position of the melted alloy portion is made variable following the rotational trajectory of the contacting alloy outer edge. Moreover, the melted alloy portion is set so as to follow the outer edge of the alloy and change its position. This will eventually melt the alloy along the outer edge contour of the lens material. In other words, the alloy can be melted without scraping the portion of the lens material that extends outward from the outer edge. Based on the above findings, the following aspects have been devised.

A first aspect of the present invention is
A lens material comprising an alloy that is a low melting point metal member, a lens material having an optical surface fixed to the alloy, and a holder fixed to the alloy on the opposite side of the alloy to the lens material. a retainer holder for holding a retainer with
a holding fixture holder driving unit that rotates the holding fixture holder with the thickness direction of the lens material as a rotation axis;
the alloy dissolving part that melts the alloy while changing its position following the outer edge of the alloy when the holder with the lens material comes into contact with the alloy dissolving part while being rotated by the holder holder driving part;
A spectacle lens manufacturing apparatus comprising:

A second aspect of the present invention is the aspect according to the first aspect,
The alloy dissolving part is elongated in the thickness direction of the lens material of the holder with the lens material held by the holder, and has a plurality of openings for supplying a liquid for dissolving the alloy. A first liquid supply mechanism comprising a tube.

A third aspect of the present invention is the aspect according to the second aspect,
When the direction of heaven and earth is upward and the direction of earth is downward,
The spectacle lens manufacturing apparatus further comprises a second liquid supply mechanism above the first liquid supply mechanism,
The second liquid supply mechanism supplies liquid toward the lens material from a direction facing the holder holder.

A fourth aspect of the present invention is the aspect according to any one of the first to third aspects,
The positional variation of the alloy melting portion is realized by an equal load spring.

A fifth aspect of the present invention is
A lens material comprising an alloy that is a low melting point metal member, a lens material having an optical surface fixed to the alloy, and a holder fixed to the alloy on the opposite side of the alloy to the lens material. a rotating step of rotating a holding fixture holder that holds a holding fixture with the lens material with the thickness direction of the lens material as a rotation axis;
an alloy melting step of melting the alloy while the position of the alloy melting portion following the outer edge of the alloy is changed when the holder with the lens material comes into contact with the alloy melting portion while rotating;
A method for manufacturing a spectacle lens, comprising:

A sixth aspect of the present invention is the aspect according to the fifth aspect,
The alloy dissolving part is elongated in the thickness direction of the lens material of the holder with the lens material held by the holder, and has a plurality of openings for supplying a liquid for dissolving the alloy. A first liquid supply mechanism comprising a tube,
The liquid supplied from the first liquid supply mechanism is hot water of 60° C. or higher.

Other aspects that can be combined with the above aspects are listed below.

A seventh aspect of the present invention is
The melted alloy portion is elongated in the thickness direction of the lens material of the holder with the lens material held by the holder holder.

An eighth aspect of the present invention is
The alloy dissolving part has (preferably 3 to 5) openings for supplying the liquid for dissolving the alloy.

A ninth aspect of the present invention is
The alloy melted portion is a mode in which the alloy melted portion itself is heated.

A tenth aspect of the present invention is
When the lens material is viewed from above, the alloy protrudes outward from the lens material.

An eleventh aspect of the present invention is
The alloy melting section comprises a tube, and at least the portion of the outer surface of the tube that contacts the alloy has a cylindrical shape. More preferably, the entire outer surface of said tube is cylindrical.

According to one embodiment of the present invention, it is possible to provide a technique for suppressing the generation of shavings from low-melting-point metal members (alloys).

FIG. 1 is a schematic cross-sectional view of a holder with spectacle lenses in which the spectacle lenses do not extend outward beyond the outer edge of the alloy. FIG. 2 is a schematic perspective view of a spectacle lens manufacturing apparatus according to one aspect of the present invention, showing how a holder with a lens material is attached to a holding unit by a material supply/removal unit. FIG. 3 is a schematic side view of the melted alloy part according to one aspect of the present invention when viewed in the X' direction. FIG. 4 is a schematic front view when viewed in the Y′ direction, showing in chronological order how the alloy melting part according to one aspect of the present invention melts the alloy while having positional stability. . FIG. 5 is a schematic perspective view of a spectacle lens manufacturing apparatus according to one aspect of the present invention, showing how an alloy is melted. FIG. 6 is a schematic perspective view of a spectacle lens manufacturing apparatus according to an aspect of the present invention, and shows how the lens material is chamfered.

In this specification, the "eyeball side surface" of the spectacle lens refers to a surface (e.g., concave surface) arranged on the eyeball side when spectacles having the spectacle lens are worn by the wearer. "Face" refers to a face (eg, convex face) located on the object side.
In this specification, "~" means "a predetermined value or more and a predetermined value or less".
In this specification, the top and bottom directions are defined as upward and the downward directions. In this specification, the Z direction is the upward direction and the Z' direction is the downward direction. The opposite direction is the rearward or Y' direction, and the direction perpendicular to these two directions, which is the X direction and the right direction as viewed from the direction facing the holding unit, is the X' direction.

[Manufacturing Apparatus and Manufacturing Method for Spectacle Lenses According to One Embodiment of the Present Invention]
An eyeglass lens manufacturing apparatus according to an aspect of the present invention includes:
A lens material comprising an alloy that is a low melting point metal member, a lens material having an optical surface fixed to the alloy, and a holder fixed to the alloy on the opposite side of the alloy to the lens material. a retainer holder for holding a retainer with
a holder holder driving unit that rotates (performs a rotating step) the holder holder about the thickness direction of the lens material as a rotation axis;
When the holder with the lens material comes into contact with the alloy dissolving portion while being rotated by the holder holder driving portion, the alloy is melted (performs the alloy melting step) while changing its position following the outer edge of the alloy. a dissolving section;
Prepare.

The holding tool holder is not particularly limited as long as it can hold the holding tool with the lens material and can be rotated by the holding tool holder driving section.

Although the details, preferred examples, and modified examples of the alloy melting portion will be described later, it is assumed that the alloy extends outward from the outer edge of the lens material when the holder with the lens material is viewed from the lens material side. In this case, the alloy dissolving section melts the alloy by bringing the alloy fixed to the lens material into contact with the alloy dissolving section while rotating the holder with the lens material.

One of the features of one aspect of the present invention is to set the position of the alloy melting portion so as to be variable following the rotational trajectory of the outer edge of the alloy in contact. This will eventually melt the alloy along the outer edge contour of the lens material. Note that the melted alloy portion may be referred to as a copying member.

As a result, the alloy can be melted without shaving the portion that extends outward from the outer edge of the lens material, suppressing the generation of shavings of the alloy and improving the yield when finally obtaining the spectacle lens. .

[Preferred example and modified example of spectacle lens manufacturing apparatus according to one aspect of the present invention]
Details, preferred examples, and modified examples of one embodiment of the present invention are described below.

FIG. 2 is a schematic perspective view of the spectacle lens manufacturing apparatus 1 according to one aspect of the present invention, and shows how a holder with lens material is attached to the holding unit 2 by the supply/removal unit 3 .

A spectacle lens manufacturing apparatus 1 (hereinafter also simply referred to as apparatus 1) according to an aspect of the present invention is mainly composed of the following units.
・Lens material holding unit 2
・Material supply/removal unit 3 for lens material in device 1
・Alloy melting unit 4 in holder with lens material
・Chamfering unit 5 for lens material
・Liquid supply unit 6 (second liquid supply mechanism 6) different from the above units
・Drainage unit 7 for liquid used in this device 1
Of these units, at least the holding unit 2, the alloy dissolving unit 4, the chamfering unit 5, and the second liquid supply mechanism 6 (optionally also the drainage unit 7) are arranged inside the housing (not shown) of the device 1. be done. The operation of each unit is controlled by a controller (not shown) within the apparatus 1 .

<Holding unit 2>
The holding unit 2 for the lens material in the upper left direction in FIG. 21b.

Two holders 21a and 21b are arranged side by side in the X direction. Thus, the apparatus 1 according to one aspect of the present invention can work on two lens blanks simultaneously. Henceforth, a and b attached after a code|symbol point out a set of two members, and code|symbol a and b may be abbreviate|omitted.

A retainer holder drive unit 22 is arranged behind the retainer holder 21 . The holder driving portion 22 is connected to the holder 21 via a connecting portion 23 having a rod shape. The holding tool holder driving section 22 has a function of rotating the holding tool holder 21 together with the connecting section 23 . In addition, the holding tool holder 21 has a function of holding the holding tool with the lens material (for example, a vacuum suction function).

By the way, the part of the lens material that protrudes outward from the alloy may be held (so-called perimeter chucking may be performed), but as described above, it is conceivable that the part of the lens material does not protrude. Therefore, it is preferable to hold the holder with a vacuum suction function.

As long as the holding unit 2 has the above functions, there is no limitation on the configuration of the holding unit 2 itself, and a known configuration may be used.

<Material supply and removal unit 3>
After the lens tray 31 flowing from the conveyor arranged in the XX' direction is fixed by two stoppers 32, the material supply/removal unit 3 on the right side of FIG. It has a function of moving the attached holder to the holder 21 . Conversely, it also has a function of moving the chamfered holder with the lens material from the holder 21 to the lens tray 31 . The material supply/removal unit 3 itself is not limited in construction as long as it has these functions, and a known construction may be used.

<Alloy melting unit 4>
The alloy melting unit 4 is arranged below the lens material held by the holding tool holder 21 . The alloy melting unit 4 includes an alloy melting part 41 that melts the alloy while following the outer edge of the alloy and changing its position when it comes into contact with the alloy melting part 41 . The melted alloy parts 41 are provided symmetrically (symmetrically in the XX′ direction) with respect to each holder holder 21 .

Furthermore, the alloy melting unit 4 includes an alloy melting guide 42 connected at one end to the alloy melting section 41 and elongated in the XX' direction. The other end of the guide is connected to the upper end of an alloy melting elevating section 43 elongated in the Z-Z' direction, and the lower end of the alloy melting elevating section 43 is connected to an alloy melting driving section 44 . The alloy melting lifting part 43 can be expanded and contracted in the Z direction by the alloy melting driving part 44 .

The melted alloy portion 41 is preferably elongated in the thickness direction (YY' direction) of the lens material of the holder with the lens material held by the holder 21 . In this case, when the lens material is viewed from above, the melted alloy portion 41 is evenly brought into contact with the thickness of the alloy projecting outward from the lens material. As a result, undissolved alloy can be suppressed. In addition, this "planar view" means that when viewed facing the lens material, more specifically, as shown in FIG. Refers to when you see

FIG. 3 is a schematic side view of the melted alloy portion 41b according to one aspect of the present invention when viewed in the X' direction.

A preferred aspect of the alloy dissolving section 41 according to one aspect of the present invention includes a tube having an opening 411 for supplying a liquid for dissolving the alloy.

The liquid is not particularly limited as long as it can melt the alloy and does not interfere with the apparatus 1. For example, it may be hot water having a melting point of the alloy or higher (e.g., 60° C. or higher, preferably 80° C. or higher). It has less environmental impact and lower costs. Henceforth, the "liquid" in this specification is the same.

With this configuration, the liquid (the white arrow in FIG. 3 and the same applies to FIG. 4 described later) flows from the inside of the alloy dissolving section 41 through the opening 411 without washing away the melted alloy by the second liquid supply mechanism 6 described later. ) is fed and the dissolved alloy is washed away. This configuration has the effect of making it possible for the liquid to heat the alloy melting part 41 for melting the alloy and also to wash away the melted alloy. The alloy dissolving part 41 of this aspect is also referred to as a "first liquid supply mechanism 41".

Although both ends of the tube in the longitudinal direction (YY' direction) may be penetrated, the liquid can be efficiently supplied to the alloy from the opening 411 by not penetrating one end 413 . At this time, one end 412 of the tube on the penetration side, that is, on the liquid inflow side may be provided on the Y' direction side.

At least the portion of the outer surface of the tube that contacts the alloy is preferably cylindrical, and more preferably the entire tube is cylindrical. As a result, good contact with the alloy is possible, and the alloy can be efficiently dissolved.

In addition, it is preferable that there are a plurality of openings 411 (for example, 3 to 5, or 3 in one aspect of the present invention), and it is preferable that there are a plurality of openings 411 along the longitudinal direction (YY' direction). . In this case, the melted alloy portion 41 is evenly brought into contact with the thickness direction of the alloy protruding outward from the lens material. As a result, undissolved alloy can be further suppressed.

Although the size and shape of the opening 411 are not particularly limited, it may be a circular hole with a diameter of 0.5 to 1.5 mm, for example. Also, when there are a plurality of openings 411, each opening 411 may have a different size or shape. Moreover, the intervals between the respective openings 411 may be varied.

Incidentally, the alloy melting portion 41 according to one aspect of the present invention is not particularly limited as long as the alloy melting portion 41 itself is heated. For example, a configuration in which the alloy melting part 41 generates heat by itself like a soldering iron may be adopted. Alternatively, the alloy dissolving part 41 may be hollow without the opening 411 and may be configured to continuously supply a high-temperature liquid into the hollow. However, in these cases, it is preferable to supply the liquid from above the alloy dissolving section 41 by the second liquid supply mechanism 6, which will be described later, to wash away the dissolved alloy.

The material of the alloy melting portion 41 is not particularly limited. Therefore, a material with relatively high thermal conductivity (for example, aluminum, iron, or stainless steel) is preferable.

FIG. 4 is a schematic front view when viewed in the Y′ direction, showing in chronological order how the alloy melting part 41b according to one aspect of the present invention melts the alloy while having position stability. be.

As shown in FIG. 4, the melted alloy portion 41 according to one aspect of the present invention has positional stability. This "position restorability" refers to the property that, when the holder with the lens material is placed in the device 1, it tries to return to the position of the melted alloy portion 41b when the holder with the lens material is not placed. point to This state is shown in FIG. 4. Each time the alloy is melted by repeating the rotation of the holder with the lens material in the direction of the black arrow, the alloy melting guide 42b is no longer bent, and the alloy melting portion 41b is melted. It shows a state of returning to the original upper position (for example, the arrangement of FIG. 4(c)). In other words, the position restorability of the melted alloy portion 41 means that the position changes following the outer edge of the alloy.

This position restoring property may be realized, for example, by using the alloy melting guide 42 elongated in the X-X' direction as an equal load spring. However, as long as the position of the melted alloy portion 41 can be changed following the rotational trajectory of the outer edge of the alloy in contact, the spring is not limited to a constant load spring. Further, in one aspect of the present invention, the melted alloy portion 41 is brought into contact with the lens material below, but it may be brought into contact with the lens material from above or from the side.

<Chamfering unit 5>
The chamfering unit 5 is arranged between the alloy melting unit 4 and the material supply/removal unit 3 . The chamfering unit 5 includes a chamfering member 51 (polishing jig, ie, grindstone) for chamfering the lens material at the tip of a chamfering member drive section 52 . Two chamfering members 51 and two chamfering member driving portions 52 are arranged side by side in the XX′ direction.

The lens material can be chamfered by rotating the chamfering member 51 with the chamfering member drive unit 52 . The chamfering member driving portion 52 is connected to one end of a chamfering extension/contraction portion 53 that can be extended/contracted in the YY' direction. The chamfering expansion/contraction part 53 is connected to the chamfering first driving part 54 at the other end. The chamfering expansion/contraction portion 53 can be expanded/contracted in the YY′ direction by the first chamfering driving portion 54 . The chamfering first driving part 54 is connected to the upper end of the chamfering elevating part 55 which can be moved up and down in the Z-Z' direction. The chamfering lifting section 55 is connected to the chamfering second driving section 56 at the lower end. The second chamfering drive unit 56 allows the chamfering elevating unit 55 to extend and contract in the Z-Z' direction.

The configuration of the chamfering member driving unit 52 itself is not limited as long as it has the functions described above, and a known configuration of a lens material chamfering device may be used.

<Liquid Supply Unit 6 (Second Liquid Supply Mechanism 6) Different from Each Unit Above>
This unit is a second liquid supply mechanism 6 arranged separately from the first liquid supply mechanism 41 . A second liquid supply mechanism 6 is arranged above the holding unit 2 and the alloy dissolving unit 4 . The second liquid supply mechanism 6 supplies the liquid toward the lens material from the direction facing the holder holder 21 .

This liquid is supplied when the alloy dissolving unit 4 is in operation and when the chamfering unit 5 is in operation.

When the alloy dissolving unit 4 is in operation, liquid is supplied toward the lens material. The alloy is dissolved mainly by the first liquid supply mechanism 41, which is the alloy dissolving section 41, and the liquid is also supplied from the second liquid supply mechanism 6 to assist the alloy dissolution. By supplying the liquid toward the lens material, the second liquid supply mechanism 6 has the effect of ensuring the washing away of the molten alloy. Also, normally, it is the convex surface of the lens material that is fixed to the alloy, and the concave surface of the lens material is supplied with the liquid from the second liquid supply mechanism 6, and the high-temperature liquid accumulates on the concave surface, so that the lens material itself It also has the effect of making the alloy easier to dissolve by warming it.

Liquid is supplied toward the lens material even when the chamfering unit 5 is in operation. As a result, it is possible to wash off the shavings of the lens material during chamfering. It should be noted that normal temperature water may be used instead of hot water for this rinsing.

The second liquid supply mechanism 6 itself is not limited in construction as long as it has the functions described above, and a known construction of a lens material chamfering device may be used. Further, another liquid supply mechanism may be provided.

<Drainage unit 7>
Regarding the drainage unit 7, the drainage path is changed depending on whether the alloy dissolving unit 4 or the chamfering unit 5 is operated. The following mode changes are performed by the controller (not shown) in the device 1 described above.

(alloy melting unit 4 operation mode)
When the alloy dissolving unit 4 is operated, the alloy-containing waste liquid flows down onto the tray 71 arranged below the alloy dissolving section 41 . After that, the waste liquid is stored in the first storage portion 73 through the pipe 72 . A water level gauge/temperature sensor 74 and a heater 75 are provided in the reservoir.

The supernatant liquid of the waste liquid stored in the first storage section 73 is sucked up by the pump mechanism 76 and reused as the liquid supplied by the second liquid supply mechanism 6 . A series of configurations (in particular, the pump mechanism 76 ) related to this reuse is called a circulation mechanism 76 . Hot water is added from above to the first reservoir 73 by the pump mechanism 76 according to the detection result of the water level gauge/temperature sensor 74 .

Incidentally, the melted alloy accumulated at the bottom of the first reservoir 73 may be recovered and regenerated. In other words, the recovered melted alloy may be reused as the alloy in the holder with the lens material to be newly manufactured.

(Chamfering unit 5 operation mode)
When the chamfering unit 5 is operated, the chamfering drainage tray 77 arranged as part of the drainage unit 7 is placed below the holding unit 2 between the alloy dissolving section 41 and the second liquid supply mechanism 6 . to be placed. The Y′ direction side portion of the chamfering drainage tray 77 is connected to the chamfering drainage expansion/contraction portion 78 , and the chamfering drainage expansion/contraction portion 78 is connected to the chamfering drainage driving portion 79 . During the operation of the chamfering unit 5 , the chamfering drainage drive section 79 extends the expansion/contraction section in the Y direction, and the chamfering drainage tray 77 is placed between the alloy dissolving section 41 and the second liquid supply mechanism 6 . Deploy.

The waste liquid supplied from the second liquid supply mechanism 6 and used for chamfering flows down to the chamfering waste liquid tray 77 . Then, the waste liquid is stored in the second reservoir (not shown) from a pipe (not shown) connected to the chamfering waste liquid tray 77 . The waste liquid after chamfering contains shavings of the lens material. Like the alloy shavings discussed above, lens material shavings also affect the yield of the final spectacle lens. Therefore, the waste liquid stored in the second storage section is not reused and is treated separately.

[One specific example of a method for manufacturing a spectacle lens according to one aspect of the present invention]
A specific example of a method for manufacturing a spectacle lens according to one aspect of the present invention will be described. However, the present invention is not limited to the following aspects. In addition, the above-mentioned [spectacle lens manufacturing apparatus 1 according to one aspect of the present invention] and [preferred examples and modifications of the spectacle lens manufacturing apparatus 1 according to one aspect of the present invention] (especially functions, effects) are partially omitted.

FIG. 5 is a schematic perspective view of the spectacle lens manufacturing apparatus 1 according to one aspect of the present invention, showing how the alloy is melted.
FIG. 6 is a schematic perspective view of the spectacle lens manufacturing apparatus 1 according to one aspect of the present invention, showing how the lens material is chamfered.

<Holding process>
First, as shown in FIG. 2 mentioned above, the material supply/removal unit 3 moves the holder with the lens material on the lens tray 31 to the holder 21 . In FIG. 2, the material supply/removal unit 3 contacts and holds the lens material in the Z' direction, and rotates (the black arrow in FIG. 2) in the X' direction toward the holder holder 21. The holder with the lens material is delivered, and the holder with the lens material is held by the holder 21 (holding step).

<Rotation process>
After that, the holding tool holder drive unit 22 rotates the holding tool holder 21 holding the holding tool with the lens material around the thickness direction (YY' direction) of the lens material as a rotation axis. The number of revolutions is not particularly limited, but may be 1 to 60 rpm in the alloy melting process, and may be 1 to 300 rpm in the chamfering process.

<Alloy melting process>
When the alloy dissolving part 41 is used as the first liquid supply mechanism, hot water of 60° C. or higher is passed through the first liquid supply mechanism 41, and the liquid is discharged from the plurality of openings 411 formed along the YY′ direction. Let the hot water squirt out. It should be noted that the liquid passing through the first liquid supply mechanism 41 may be performed by a liquid passing tube (not shown). Incidentally, the flow rate of hot water is not particularly limited, but may be set to 10 to 500 cc/min.

After that, as shown in FIG. 5, the alloy dissolving drive unit 44 extends the alloy dissolving elevating unit 43 in the Z direction, and rotates the holder with the lens material to melt the alloy protruding outward from the lens material. The part 41 is brought into contact. At that time, the second liquid supply mechanism 6 extends downward (in the Z' direction), the liquid supply nozzle is arranged to face the concave surface of the lens material, and the liquid is supplied.

As shown in FIG. 4 mentioned above, even if the holder with the lens material rotates, the first liquid supply mechanism 41 (alloy dissolution part 41) is in contact with the alloy dissolution guide 42 as an equal load spring. The position fluctuates following the outer edge of the alloy.

It should be noted that it may be confirmed by detecting the presence or absence of the alloy using a sensor or the like whether or not the alloy protruding to the outside of the lens material has been completely melted. Moreover, even if the confirmation is not performed, it is possible to spend more time in this step than the time required to completely dissolve the alloy protruding outward from the lens material.

After the alloy melting process is completed, the alloy melting driving part 44 retracts the lifting part in the Z' direction, and returns the alloy melting part 41 to the position before the alloy melting process.

<Chamfering process>
As shown in FIG. 6, while the chamfering member driving unit 52 rotates the chamfering member 51, the second chamfering driving unit 56 extends the chamfering elevating unit 55 in the Z direction so that the chamfering member 51 faces the edge of the lens material. to Then, the first chamfering driving section 54 extends the chamfering expansion/contraction section 53 in the Y' direction, and the chamfering member 51 is brought into contact with the edge of the lens material to perform chamfering.

During this step, the liquid is supplied from the second liquid supply mechanism 6 . Further, the holder 21 is also rotated according to the chamfering process designed in advance. Then, the drainage unit 7 is put into the chamfering unit 5 operation mode. That is, the chamfering liquid drain driving unit 79 extends the expandable portion in the Y direction, and the chamfering liquid drain tray 77 is arranged between the alloy dissolving unit 41 and the second liquid supply mechanism 6 . Then, the waste liquid supplied from the second liquid supply mechanism 6 and used for the chamfering is collected through a path different from the waste liquid in the alloy dissolving step.

After the chamfering step, the rotation of the chamfering member 51 by the chamfering member driving section 52 is stopped, and the chamfering unit 5 is returned to its original position by the first chamfering driving section 54 and the second chamfering driving section 56 .

By the above steps (and thus the configuration of the device 1), the alloy can be melted without shaving the portion extending outward from the outer edge of the lens material, the generation of shavings of the alloy can be suppressed, and finally the spectacles can be obtained. The yield of lenses can be improved. Moreover, the above steps can be performed by automation. For example, it becomes possible to incorporate in-line between grinding processing (CG processing) and polishing processing for a lens material. This means that work efficiency and lead time can be shortened.

1 Spectacle lens manufacturing apparatus 2 Holding units 21a, b Holding tool holders 22a, b Holding tool holder driving units 23a, b Connecting unit 3 Material supply/removal unit 31 Lens tray 32 Stopper 4 Alloy dissolving unit 41a, b Alloy dissolving unit (second 1 liquid supply mechanism)
411a, b Opening 412a, b One end (through)
413a,b one end (non-penetrating)
42a, b alloy melting guides 43a, b alloy melting elevating units 44a, b alloy melting driving unit 5 chamfering units 51a, b chamfering members 52a, b chamfering member driving units 53a, b chamfering expansion/contraction units 54a, b first chamfering driving unit 55a , b chamfering elevation unit 56a,b chamfering second driving unit 6 liquid supply unit (second liquid supply mechanism)
7 drainage unit 71 tray 72 pipe 73 first reservoir 74 water level gauge and temperature sensor 75 heater 76 pump mechanism (circulation mechanism)
77 chamfering drainage tray 78 chamfering drainage expansion/contraction section 79 chamfering drainage driving section 100 lens material 101 protective film 102 low melting point metal member (alloy)
104 holder (Yatoi)
L holder with lens material

Claims (6)

A lens material comprising an alloy that is a low melting point metal member, a lens material having an optical surface fixed to the alloy, and a holder fixed to the alloy on the opposite side of the alloy to the lens material. a retainer holder for holding a retainer with
a holding fixture holder driving unit that rotates the holding fixture holder with the thickness direction of the lens material as a rotation axis;
The outer edge of the alloy , which is an alloy that protrudes outward from the lens material when the lens material is viewed from above, when the holder with the lens material is rotated by the holder holder driving portion and comes into contact with the alloy melting portion. The alloy dissolving part that melts the alloy while changing its position following the
A spectacle lens manufacturing device. The alloy dissolving part is elongated in the thickness direction of the lens material of the holder with the lens material held by the holder, and has a plurality of openings for supplying a liquid for dissolving the alloy. 2. The spectacle lens manufacturing apparatus according to claim 1, wherein the first liquid supply mechanism includes a pipe. When the direction of heaven and earth is upward and the direction of earth is downward,
The spectacle lens manufacturing apparatus further comprises a second liquid supply mechanism above the first liquid supply mechanism,
3. The spectacle lens manufacturing apparatus according to claim 2, wherein the second liquid supply mechanism supplies the liquid toward the lens material from a direction facing the holder holder. 4. The spectacle lens manufacturing apparatus according to claim 1, wherein said positional variation of said alloy melting portion is realized by an equal load spring. A lens material comprising an alloy that is a low melting point metal member, a lens material having an optical surface fixed to the alloy, and a holder fixed to the alloy on the opposite side of the alloy to the lens material. a rotating step of rotating a holding fixture holder that holds a holding fixture with the lens material with the thickness direction of the lens material as a rotation axis;
When the holder with the lens material comes into contact with the melted alloy portion while rotating, the melted alloy portion is formed on the outer edge of the alloy, which is the alloy protruding outward from the lens material when the lens material is viewed from above. an alloy melting step of melting the alloy while following and changing the position;
A method for manufacturing a spectacle lens, comprising: The alloy dissolving part is elongated in the thickness direction of the lens material of the holder with the lens material held by the holder, and has a plurality of openings for supplying a liquid for dissolving the alloy. A first liquid supply mechanism comprising a tube,
6. The spectacle lens manufacturing method according to claim 5, wherein the liquid supplied from the first liquid supply mechanism is hot water of 60[deg.] C. or higher.

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