JP5944753B2 - Lens removal device - Google Patents

Description

  The present invention relates to a lens removing device for removing a spectacle lens fixed to a block jig by a fixing medium made of a low melting point alloy from the block jig.

  The spectacle lens is subjected to machining such as polishing, cutting, and grinding during the manufacturing process. These processes are performed by attaching a spectacle lens to a processing apparatus. A block jig is used to attach the spectacle lens to the processing apparatus.

The block jig includes a lens support portion to which the spectacle lens is fixed and an attachment portion attached to the processing apparatus. That is, the spectacle lens is attached to the processing apparatus via the block jig while being fixed to the block jig.
In order to fix the spectacle lens to the block jig, a liquid fixing medium is filled between the spectacle lens and the block jig, and the fixing medium is solidified. The fixing medium is formed of a low melting point alloy, and is filled between the spectacle lens and the block jig in a molten state, and then cooled and solidified. When the fixing medium is solidified, the spectacle lens is fixed to the block jig.

  After the processing of the spectacle lens is completed, the spectacle lens is removed from the block jig. The operation of removing the block jig is generally called deblocking processing. As disclosed in Patent Document 1, the deblocking process is performed by a method of applying a load to the block jig to remove the block jig from the spectacle lens, a method such as impact blocking or hot water blocking.

The lens removing device disclosed in Patent Document 1 applies a load to the spectacle lens and the block jig in a direction in which they separate.
The impact deblocking is a method of removing the block jig from the spectacle lens by applying an impact. Hot water deblocking is a method in which a spectacle lens fixed to a block jig is immersed in hot water, a fixing medium is melted, and the block jig is removed from the spectacle lens.

JP 2009-233792 A

In the lens removing device disclosed in Patent Document 1, the spectacle lens may be deformed or the spectacle lens may be damaged by contact with a portion that supports the spectacle lens.
In impact deblocking, the spectacle lens may be damaged by impact. In hot water deblocking, if the temperature of the hot water is too high, the polished spectacle lens surface is roughened or deformed. On the other hand, if the temperature of the hot water is low when performing the hot water deblocking, the time for the deblocking process becomes longer and the productivity is lowered.

  The present invention has been made to solve such a problem, and a lens having high productivity by performing deblocking in a short time without causing deformation or breakage of the spectacle lens and rough or deformation of the lens surface. An object is to provide a removal device.

  In order to achieve this object, the lens removing device according to the present invention includes a separating unit in which warm water is stored so that a spectacle lens fixed to a block jig can be immersed through a fixing medium made of a low melting point alloy. And the hot water jetting part for jetting hot water having a temperature higher than the melting point of the fixing medium into the separation part and the partition member having a gap through which the molten fixing medium can pass forms the upper part. A spectacle lens is immersed in the separation unit with the block jig positioned below, and the hot water jetting unit includes the spectacle lens and the block jig. Directing the exposed portion of the fixing medium exposed to the tool to generate a water flow flowing in the circumferential direction of the spectacle lens along the exposed portion, and the partition member is removed from the spectacle lens Above It is characterized in that as it can be placed a lock jig.

  According to the present invention, in the above invention, the separation unit heats the immersion tank in which the spectacle lens is immersed, an outer tank that houses the immersion tank, and hot water that overflows from the immersion tank and flows out into the outer tank. And a hot water circulation device for supplying the hot water jetting part.

  According to the present invention, in the above invention, a conveyance device having a clamp for holding the spectacle lens and for taking the spectacle lens into and out of the separation portion, and detecting that the block jig has dropped on the partition member A detecting device, and the conveying device carries out the eyeglass lens from the separating portion when the detecting device detects a fall of the block jig.

  The present invention is characterized in that, in the above-mentioned invention, the hot water ejection portion is constituted by three nozzles, and these nozzles are positioned so as to be arranged at equal intervals in the circumferential direction of the spectacle lens when viewed from above. And

According to the present invention, the hot water jetted from the hot water jetting part turns in the circumferential direction of the spectacle lens along the exposed portion of the fixing medium. For this reason, since the substantially whole area of the exposed portion of the fixing medium is always heated with new hot water, the fixing medium is efficiently heated, the temperature rise is promoted, and the fixing medium can be melted quickly. When the fixing medium is melted, the block jig is detached from the spectacle lens and falls onto the partition member. The melted fixing medium passes through the gap between the partition members and is stored in the medium storage unit. That is, the block jig is detached from the spectacle lens by hot water deblocking without applying a load or an impact.
Therefore, according to the present invention, it is possible to provide a lens detaching apparatus that is deblocked in a short time and has high productivity without causing deformation or breakage of the spectacle lens and rough or deformation of the lens surface. .

It is a top view of the lens removal apparatus by 1st Embodiment. 1 is a sectional view of a lens removing device according to a first embodiment, which is a sectional view taken along line II-II in FIG. It is a side view of a spectacle lens and a block jig in a blocking state. It is sectional drawing of the lens removal apparatus by 2nd Embodiment.

(First embodiment)
Hereinafter, an embodiment of a lens removing apparatus according to the present invention will be described in detail with reference to FIGS.
The lens removing device 1 shown in FIGS. 1 and 2 includes a separation unit 4 having two tanks 2 and 3, a hot water jetting unit 5 provided in the separation unit 4, and a bottom of the separation unit 4. And a medium storage unit 6 provided.

The two tanks 2 and 3 are an immersion tank 2 formed in a circular shape when viewed from above and an outer tank 3 that accommodates the immersion tank 2.
The immersion bath 2 is formed in a bottomed cylindrical shape having an opening through which a spectacle lens 11 in a blocking state shown in FIG. 3 can be taken in and out from above, and warm water 12 is stored therein. In other words, the separating unit 4 stores hot water 12 so that the spectacle lens 11 can be immersed therein.
The blocking state refers to a state in which the spectacle lens 11 is fixed to the block jig 14 via a fixing medium 13 made of a low melting point alloy (hereinafter simply referred to as an alloy 13).

  As shown in FIG. 3, the alloy 13 is filled between the spectacle lens 11 and the block jig 14 in a molten state, and then solidified by cooling. The alloy 13 has a relatively thin disk shape. Further, the outer peripheral portion of the alloy 13 is exposed between the spectacle lens 11 and the block jig 14.

The block jig 14 includes a lens support portion 14a to which the spectacle lens 11 is fixed, and an attachment portion 14b that is detachably attached to a processing apparatus (not shown).
The spectacle lens 11 is mounted on a processing device via the block jig 14, and the lens surface 11 a is polished, cut, or ground by the processing device.
Although not shown, the spectacle lens 11 that has been machined is inserted into the immersion bath 2 together with the block jig 14 while being held by an operator or held by a holding device. When the spectacle lens 11 is inserted into the immersion tank 2, the block jig 14 is positioned under the spectacle lens 11.

  The outer tub 3 is for receiving hot water 12 overflowing from the dipping tub 2. The outer tub 3 according to this embodiment is formed in a box shape that opens upward. The immersion tank 2 is provided inside the outer tank 3. The outer shape of the outer tub 3 is not limited to a rectangular box shape when viewed from above, and may be circular when viewed from above. The outer tub 3 is connected to a hot water circulation device 15 that sucks in hot water accumulated in the outer tub 3. The warm water in the outer tub 3 is warm water 12 that has overflowed from the dip tank 2 and has flowed out.

  As shown in FIG. 2, the hot water circulation device 15 includes a hot water tank 18 communicated with the outer tub 3 via a suction pipe body 16 and a filter 17, and a supply pipe for sucking hot water from the hot water tank 18. And a pump 20 that supplies the hot water jetting unit 5 described later by the body 19. That is, the hot water circulation device 15 reheats the hot water 12 that has overflowed from the immersion tank 2 and has flowed into the outer tank 3, and supplies the hot water 12 to the hot water jetting unit 5 described later. The warm water tank 18 is provided with a heater 21 for heating the warm water to a predetermined temperature. The heater 21 raises the temperature of the hot water in the hot water tank 18 to a predetermined temperature that is higher than 61 ° which is the melting point of the alloy 13 and does not adversely affect the spectacle lens 11. The temperature of the hot water can be set to a temperature range of 61 ° C. or higher and lower than 85 ° C. The temperature of hot water is preferably 70 ° C. or higher and lower than 80 ° C., and more preferably 75 ° C. or higher and lower than 80 ° C.

  The hot water jetting unit 5 jets hot water supplied from the hot water circulation device 15, that is, hot water 12 having a temperature higher than the melting point of the alloy 13 into the immersion bath 2. As shown in FIG. 1, the hot water jetting unit 5 according to this embodiment includes three nozzles 22. These nozzles 22 are respectively connected to the supply pipe body 19 of the hot water circulation device 15, and the hot water 12 is supplied from the supply pipe body 19. The hot water 12 ejected from the hot water ejection part 5 fills the immersion tank 2, overflows from the upper end of the immersion tank 2, and flows into the outer tank 3. As described above, the hot water 12 in the outer tub 3 is reheated by the hot water circulation device 15 and supplied to the hot water ejection unit 5.

  As shown in FIG. 1, the three nozzles 22 are positioned so as to be arranged at equal intervals in the circumferential direction of the circular immersion tank 2 as viewed from above, and are horizontally directed toward the center of the immersion tank 2. It extends to. The tip of each nozzle 22 is arranged so that the block jig 14 can be inserted from above into a region surrounded by these three nozzles 22. This tip portion is directed to the exposed portion 13a (see FIG. 2) of the alloy 13 in a state where the block jig 14 is inserted into the central portion of the immersion tank 2, and the peripheral edge of the spectacle lens 11 along the exposed portion 13a. It is formed so that a water flow flowing in the direction is generated.

  That is, the exposed portion 13 a of the alloy 13 is exposed to the hot water 12 ejected from the three nozzles 22. The warm water 12 flows around the alloy 13 as a swirling flow along the exposed portion 13a as indicated by an arrow in FIG. When the hot water 12 hits the alloy 13 in this way, the temperature of the alloy 13 exceeds the melting point, and the alloy 13 melts. The specific gravity of Alloy 13 is greater than the specific gravity of water. For this reason, the molten alloy 13 falls to the medium storage part 6 located at the bottom in the immersion tank 2. Further, when the alloy 13 is melted, the block jig 14 is detached from the spectacle lens 11 and falls in the immersion tank 2.

  The medium storage section 6 is for storing the molten alloy 13. In the medium storage unit 6 according to this embodiment, the first partition member 23 provided at the bottom of the immersion tank 2 and the second partition member 24 provided at the bottom of the outer tank 3 form an upper end. Is provided at the bottom of the two tanks 2,3. The medium storage portion 6 according to this embodiment is configured by an inner storage portion 6 a formed using the bottom portion of the immersion tank 2 and an outer storage portion 6 b formed using the bottom portion of the outer tank 3. Yes. In addition, as the medium storage part 6, it can form separately from the immersion tank 2 and the outer tank 3, and can be formed so that it can remove from these tanks 2 and 3. FIG.

  The first and second partition members 23 and 24 are plates having a large number of holes 23 a and 24 a sized to allow the molten alloy 13 to pass through, and the block jig removed from the spectacle lens 11. It is formed by a rigid plate on which the tool 14 can be placed. In this embodiment, the holes 23a and 24a constitute the “gap through which the fixing medium can pass” as referred to in the present invention. In addition, the structure of the 1st, 2nd partition members 23 and 24 is not limited to the "plate in which the hole was formed" as shown in this Embodiment, It can change suitably. For example, although not shown, the first and second partition members 23 and 24 can be formed of a wire mesh or punching metal.

Drain valves 25 and 26 for discharging the alloy 13 are provided at the lower end of the medium storage unit 6.
The alloy 13 melted in the immersion tank 2 passes through the hole 23a of the first partition member 23, flows into the inner storage portion 6a, and is stored. The alloy 13 melted in the immersion tank 2 may flow out from the immersion tank 2 to the outer tank 3 side along with the hot water 12. The alloy 13 that has come out of the outer tub 3 falls in the outer tub 3, passes through the hole 24 a of the second partition member 24, flows into the outer storage portion 6 b, and is stored.

  In order to remove the block jig 14 from the spectacle lens 11 by the lens removing device 1 according to this embodiment, first, hot water 12 having a predetermined temperature is jetted from the hot water jetting part 5 and the immersion tank 2 is heated with hot water 12. Fulfill. Next, the eyeglass lens 11 in the blocking state is immersed in the immersion bath 2 with the block jig 14 positioned below the eyeglass lens 11. At this time, the spectacle lens 11 is immersed in the central part of the immersion tank 2 so that the block jig 14 is surrounded by the three nozzles 22 when viewed from above. The vertical position of the spectacle lens 11 is adjusted so that the exposed portion 13 a of the alloy 13 is positioned at the same height as the nozzle 22.

  Thus, by immersing the spectacle lens 11 in the immersion tank 2, the hot water 12 ejected from the warm water ejection section 5 turns in the circumferential direction of the spectacle lens 11 along the exposed portion 13 a of the alloy 13. For this reason, since the substantially entire region of the exposed portion 13a of the alloy 13 is always heated by the new warm water 12, the alloy 13 is efficiently heated, the temperature rise of the alloy 13 is promoted, and the alloy 13 can be melted quickly. it can. The molten alloy 13 falls in the immersion tank 2, passes through the hole 23 a of the first partition member 23, and is stored in the inner storage portion 6 a of the medium storage portion 6.

The block jig 14 is detached from the spectacle lens 11 when the alloy 13 is melted, and falls onto the first partition member 23. That is, the block jig 14 is detached from the spectacle lens 11 by hot water deblocking without applying a load or an impact.
Therefore, according to this embodiment, there is provided a lens detaching device which is deblocked in a short time and has high productivity without causing deformation or breakage of the spectacle lens 11 and rough or deformation of the lens surface. be able to.

  The spectacle lens 11 is pulled up from the immersion tank 2 after the block jig 14 is removed, and sent to the apparatus for the next step. After the eyeglass lens 11 is taken out of the immersion tank 2, the block jig 14 is taken out of the immersion tank 2 by, for example, an operator or a block jig transport device (not shown).

The separation unit 4 according to this embodiment includes an immersion tank 2, an outer tank 3, and a hot water circulation device 15. The immersion tank 2 is for immersing the spectacle lens 11. The outer tub 3 accommodates the immersion tub 2. The hot water circulation device 15 heats the hot water 12 overflowing from the immersion tank 2 and flowing out into the outer tank 3 and supplies the hot water 12 to the hot water jetting section 5.
According to this embodiment, the hot water 12 can be separated from the alloy 13 in the immersion tank 2 and reused.

That is, according to this embodiment, since the hot water 12 is reused, the hot water 12 at a temperature at which the alloy 13 melts can be obtained quickly. Moreover, since the immersion tank 2 is a structure where the warm water 12 overflows, it is filled with the warm water 12 ejected from the warm water ejection part 5. That is, the temperature in the immersion tank 2 is based on the temperature of the hot water 12, the supply amount, and the like.
Therefore, according to this embodiment, the hot water 12 having a predetermined temperature can be obtained quickly, and the water temperature in the dipping bath 2 automatically becomes a desired temperature. An apparatus can be provided.

The hot water jetting part 5 according to this embodiment is constituted by three nozzles 22. These nozzles 22 are positioned so as to be arranged at equal intervals in the circumferential direction of the spectacle lens 11 (immersion tank 1) when viewed from above.
For this reason, since it is possible to generate a swirl flow around the alloy 13 with the hot water 12 with a simple structure, it is possible to provide a lens removing device with low manufacturing cost despite high productivity.

(Second Embodiment)
The lens removing device according to the present invention can be configured as shown in FIG. 4, members identical or equivalent to those described with reference to FIGS. 1 to 3 are given the same reference numerals, and detailed description thereof is omitted as appropriate.

  The lens removing device 1 according to this embodiment includes a transport device 31 for transporting the spectacle lens 11 and a detection device 32 for detecting the fall of the block jig 14. The transport device 31 includes a clamp 33 that holds the spectacle lens 11 in a state where the lens surface 11a is oriented in the vertical direction. As the clamp 33, one that sandwiches the outer peripheral portion of the spectacle lens 11 from three radial directions can be used. The transport device 31 performs a carry-in operation for immersing the spectacle lens 11 held by the clamp 33 in the immersion tank 2 (separation unit 4) and a carry-out operation for lifting the spectacle lens 11 from the immersion tank 2.

  The detection device 32 detects that the block jig 14 has dropped onto the first partition member 23. In order to detect the fall of the block jig 14, a sensor for detecting the weight of the block jig 14, a sensor for optically detecting the block jig 14, and a magnetic field change caused by the fall of the block jig 14 are detected. This can be realized by using a sensor to detect.

The transport device 31 is configured to carry the eyeglass lens 11 out of the immersion bath 2 when the detection device 32 detects the fall of the block jig 14.
Therefore, in the lens take-out device according to this embodiment, the detection device 32 detects the fall of the block jig 14 immediately after the alloy 13 is melted and the block jig 14 is detached from the spectacle lens 11, and the conveying device 31 Carries the eyeglass lens 11 out of the immersion tank 2.
Therefore, according to this embodiment, since the spectacle lens 11 is quickly carried out from the immersion tank 2 immediately after the block jig 14 is detached, a lens detaching device with further improved productivity is provided. can do.

  DESCRIPTION OF SYMBOLS 1 ... Lens removal apparatus, 13 ... Alloy (fixing medium), 14 ... Block jig, 11 ... Eyeglass lens, 4 ... Separation part, 12 ... Hot water, 5 ... Hot water ejection part, 23 ... 1st partition member, 24 ... 2nd partition member, 6 ... Medium storage part, 6a ... Inner storage part, 6b ... Outer storage part, 13a ... Exposed part, 2 ... Immersion tank, 3 ... Outer tank, 15 ... Hot water circulation apparatus, 31 ... Conveyance Device, 32 ... detection device.

Claims (4)

A separation part in which hot water is stored so that the spectacle lens fixed to the block jig can be immersed through a fixing medium made of a low melting point alloy;
A hot water ejection part for ejecting hot water having a temperature higher than the melting point of the fixing medium into the separation part;
A partition member having a gap through which the molten fixing medium can pass, and a medium storage part provided at the bottom of the separation part so as to form an upper end part,
The spectacle lens is immersed in the separation portion with the block jig positioned below,
The hot water jetting portion is directed to an exposed portion of the fixing medium exposed between the spectacle lens and the block jig, and generates a water flow that flows in the circumferential direction of the spectacle lens along the exposed portion. Yes,
The lens removing device, wherein the partition member is capable of placing the block jig removed from the spectacle lens. The lens removing device according to claim 1, wherein the separating unit includes an immersion tank in which the spectacle lens is immersed,
An outer tank containing this immersion tank;
A lens removing device, comprising: a hot water circulation device that heats the hot water that has overflowed from the immersion bath and has flowed into the outer bath, and supplies the hot water to the hot water ejection portion. The lens removing device according to claim 1 or 2, wherein the conveying device has a clamp for holding the spectacle lens and takes the spectacle lens in and out of the separating portion;
A detection device that detects that the block jig has dropped on the partition member;
The lens removing device according to claim 1, wherein the conveying device is configured to carry out the spectacle lens from the separating portion when the detecting device detects the fall of the block jig. In the lens detaching device according to any one of claims 1 to 3, the warm water ejection part is constituted by three nozzles,
These nozzles are positioned so as to be arranged at equal intervals in the circumferential direction of the spectacle lens when viewed from above.

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