JP5703056B2 - Multifocal spectacle lens molding mold manufacturing equipment - Google Patents

Description

  The present invention relates to a multifocal spectacle lens molding mold manufacturing apparatus used for manufacturing a mold for molding a multifocal lens such as a bifocal lens.

  Conventionally, as an example of a spectacle lens, a multifocal lens in which two or more focal points are combined is known. This multifocal lens has a distance portion having a first focus for hyperopia and a near portion having a second focus for myopia (see, for example, Patent Document 1 and Patent Document 2). .) Such a multifocal lens is formed, for example, by cast polymerization using a mold (molding die) that forms a lens surface. The near portion having the second focus is formed in a substantially half moon shape. Therefore, the mold used for cast polymerization has a substantially half-moon-shaped recess serving as a near portion.

Next, a method for manufacturing a mold for molding a bifocal lens which is an example of a multifocal lens will be described with reference to FIG.
FIG. 7 is an explanatory diagram for explaining a manufacturing process of a mold for molding a bifocal lens.

  Here, it was difficult to form a substantially meniscus-shaped recess directly in the mold. Therefore, as shown in FIG. 7A, first, a region (hereinafter, referred to as a “small ball portion”) 101 that becomes the second focus for myopia in the mold 100 having the first focus for hyperopia is cut into a substantially circular shape.

  Next, as shown in FIG. 7B, a filling 200 having the same shape as the small ball portion 101 is prepared, and this filling 200 is cut to form a half-moon portion 201. Then, as shown in FIG. 7C, the half-moon part 201 cut from the filling 200 is fixed to a predetermined position of the small ball part 101 using an adhesive such as a resin. Thereby, manufacture of the mold 100 used when shape | molding a bifocal lens is completed.

Japanese Patent Application Laid-Open No. 8-94980 Japanese Patent Laid-Open No. 10-186290

  However, in the conventional mold manufacturing method, the filling cutting operation is performed in a state where the worker holds the filling directly. Therefore, there is a risk that the operator's hand accidentally touches the cutting blade of the cutting mechanism and is injured during the cutting operation of the stuffing. Moreover, since there was nothing to regulate the movement of the stuffing when cutting the stuffing, it was difficult to cut the stuffing without blurring along the cutting line, which was left to the skill of the operator.

  In view of the above problems, an object of the present invention is to provide a multifocal spectacle lens molding mold manufacturing apparatus capable of safely cutting a padding fixed to a small ball portion of a mold.

In order to solve the above-mentioned problems and achieve the object of the present invention, the multifocal spectacle lens molding mold manufacturing apparatus of the present invention cuts a pad attached to a small ball portion of a mold used when molding a multifocal lens. A cutting mechanism is provided. Moreover, the cover mechanism which covers the cutting | disconnection mechanism and was provided in the insertion window, the guide part extended from the insertion window to the cutting | disconnection location of the stuffing by a cutting mechanism, and the support tool which supports a stuffing are provided.
And a support has a pair of holding member which hold | maintains a padding in the state which pinched | interposed the padding and opened the clearance gap which the cutting blade of a cutting mechanism passes. In addition, the holding member holds the padding and holds the stuffing member and is inserted into the cover member from the insertion window. When the holding portion is inserted into the cover member, the holding member penetrates the cover member and is held by the user. And a gripping part.

The holding member has an engaging portion that is provided between the holding portion and the gripping portion and engages with the guide portion of the cover member and slides along the guide portion.
Thereby, a filling can be cut | disconnected without blurring at the time of a cutting | disconnection operation | work.

Further, the holding portion of the holding member is provided with an insertion hole into which the filling is inserted and a notch for visually recognizing the filling inserted into the insertion hole.
Therefore, it can be confirmed whether the filling is correctly inserted in the insertion hole of the holding portion.

  Further, the cover member may be formed of a transparent or translucent material.

  According to the multifocal spectacle lens molding mold manufacturing apparatus of the present invention, since the cutting mechanism covers the cutting mechanism by the cover member and holds the padding through the holding member, the user's hand cuts the cutting mechanism. The padding can be safely cut without touching the blade.

It is a perspective view which shows the manufacturing apparatus of the mold for multifocal spectacle lens molding of this invention. It is a perspective view which shows the holding member concerning the manufacturing apparatus of the mold for multifocal spectacle lens molding of this invention. It is a perspective view which shows the state which hold | maintains a stuffing using the holding member concerning the manufacturing apparatus of the mold for multifocal spectacle lens molding of this invention. It is a top view which shows the cover member of the manufacturing apparatus of the manufacturing apparatus of the multifocal spectacle lens molding of this invention in cross section. FIG. 5A is a plan view showing the cover member in cross section, and FIG. 5B is a side view showing the state in which the holding portion is inserted into the cover member in the multifocal spectacle lens molding mold manufacturing apparatus of the present invention. . It is a figure which shows the state which cut | disconnected the stuffing using the manufacturing apparatus of the mold for multifocal spectacle lens molding of this invention, FIG. 6A is a top view which shows a cover member in cross section, FIG. 6B is a side view. It is explanatory drawing explaining the process of manufacturing the mold for bifocal spectacle lenses.

Embodiments of a multifocal spectacle lens molding mold manufacturing apparatus according to the present invention (hereinafter referred to as “mold manufacturing apparatus”) will be described below with reference to FIGS. In addition, the same code | symbol is attached | subjected to the common member in each figure. The present invention is not limited to the following form.
The description will be given in the following order.
1. 1. Configuration example of mold manufacturing apparatus Operation of mold manufacturing equipment

1. Configuration Example of Mold Manufacturing Apparatus First, an embodiment of a mold manufacturing apparatus according to the present invention (hereinafter referred to as “this example”) will be described with reference to FIGS.
FIG. 1 is a perspective view showing a mold manufacturing apparatus of this example.

  The mold manufacturing apparatus 1 of this example is an apparatus for manufacturing a mold used to mold a multifocal lens for spectacles, for example. Specifically, it is an apparatus for cutting the padding 200 fixed to the small ball portion 101 as the second focus in the mold 100 having the first focus (see FIGS. 7B and 7C).

  As shown in FIG. 1, the mold manufacturing apparatus 1 of this example includes a work table 2, a cutting mechanism 3 disposed on the work table 2, a cover member 4, and a support tool 5 that supports the filling 200. have.

[Workbench]
On the work table 2, the cutting mechanism 3 is disposed in a state where the saw blade 3 a which is a cutting blade is exposed. The cutting mechanism 3 includes a disk-shaped saw blade 3a, a cover 3b that covers a part of the saw blade 3a, and a drive unit (not shown). The cutting mechanism 3 is an electric circular saw that cuts a cut object by rotating a saw blade 3a by a drive unit (not shown). As the saw blade 3a of the cutting mechanism 3, for example, a diamond blade is used. A cover member 4 is attached to the work table 2 so as to cover the saw blade 3 a of the cutting mechanism 3.

[Cover member]
The cover member 4 is formed in a hollow, substantially rectangular parallelepiped shape whose one surface is open. The cover member 4 includes an opening 4a having a substantially rectangular shape, a top plate 4b having a substantially rectangular shape, a front plate 4c, a back plate 4d, and two side plates 4e and 4e. Have.

  The upper surface plate 4b is disposed to face the opening 4a. A front plate 4c is provided on one side in the longitudinal direction of the top plate 4b so as to be substantially perpendicular to the top plate 4b, and a back plate 4d is provided on the other side in the longitudinal direction of the top plate 4b. It is provided substantially perpendicular to 4b. In addition, two side plates 4e and 4e are arranged on both sides of the upper surface plate 4b in the short direction so as to be substantially perpendicular to the upper surface plate 4b. Therefore, the two side plates 4e and 4e are arranged on both sides in the longitudinal direction of the front plate 4c.

  When the cutting mechanism 3 is covered by the cover member 4, the side plates 4 e of the cover member 4 are disposed on both sides in the axial direction of the saw blade 3 a of the cutting mechanism 3, and the back plate 4 d of the cover member 4 is disposed in the cutting mechanism 3. It arrange | positions at the cover 3b side. The front plate 4c of the cover member 4 is disposed on the side of the saw blade 3a exposed from the work table 2 and the cover 3b.

  An insertion window 7 is provided in the front plate 4c. The insertion window 7 is open along the longitudinal direction of the front plate 4c and is continuous with the two side plates 4e and 4e disposed on both sides of the front plate 4c in the longitudinal direction. The size of the insertion window 7 is set larger than two holding members 11 of the support 5 described later. And the holding part 12 of the two holding members 11 in the support tool 5 which mentions the padding 200 between the insertion windows 7 is inserted.

  The two side plates 4e, 4e are each provided with a guide portion 8 that opens along the longitudinal direction thereof. The guide portion 8 is continuous from the insertion window 7 provided on the front plate 4c and is opened with a predetermined length along the longitudinal direction of the side plate 4e. Specifically, the insertion window is provided on the front plate 4c. 7 to a cutting position by the saw blade 3a of the cutting mechanism 3.

  As the material of the cover member 4 having such a configuration, a transparent or translucent material is used in order to ensure the internal visibility, and for example, an acrylic resin or the like is applied.

  Moreover, although the example which formed the cover member 4 in the hollow substantially rectangular parallelepiped shape was demonstrated in this example, it is not limited to this, The saw blade 3a of the cutting mechanism 3 is covered, The insertion window 7 and a guide What is necessary is just to have the part 8. FIG. The shape of the cover member 4 may be various other shapes such as a hollow dome shape and a hemispherical shape.

  In addition, by covering the cutting mechanism 3 with the cover member 4, it is possible to prevent the user (operator) from accidentally touching the cutting blade 3a of the cutting mechanism 3 and being injured during the cutting operation. Furthermore, it is possible to prevent the shavings generated when cutting the filling 200 from being scattered.

[Support]
Next, the support 5 will be described with reference to FIGS.
FIG. 2 is a perspective view showing the holding member 11 constituting the support 5, and FIG. 3 is a perspective view showing a state in which the padding 200 is sandwiched by the support 5.

  As shown in FIG. 1, the support 5 is comprised from a pair of holding members 11 and 11 which have the same structure. The two holding members 11 and 11 hold the padding 200 sandwiched from both sides in a state where a gap through which the saw blade 3a of the cutting mechanism 3 passes is provided.

  As shown in FIG. 2, the holding member 11 includes a holding part 12 that holds the filling 200, a gripping part 13 that is held by a user who performs the work, and an engaging part 14.

  The holding | maintenance part 12 is formed in the flat substantially rectangular parallelepiped shape. The holding portion 12 includes a substantially rectangular front surface portion 12a, a back surface portion 12b facing the front surface portion 12a, an upper surface portion 12c that extends substantially vertically from one end in the short direction of the front surface portion 12a, and a front surface portion 12a. It has two side surface parts 12d, 12d that are substantially vertically continuous from both ends in the longitudinal direction. The holding portion 12 is provided with an insertion hole 16 into which the filling 200 is inserted.

  An insertion hole 16 is provided in the front part 12 a of the holding part 12. As shown in FIG. 3, the insertion hole 16 is a substantially half-moon shaped recess corresponding to the shape of the filling 200. A part of the filling 200 is inserted into the insertion hole 16, and the edge of the filling 200 in the radially outward direction is opposed to the inner wall of the insertion hole 16.

  A substantially semicircular opening window 17 and a notch 18 are formed in the upper surface portion 12c. The opening window 17 is formed from the corners of the upper surface portion 12 c and the front surface portion 12 a and communicates with the insertion hole 16. By providing the opening window 17 in the upper surface part 12c, the cutting state of the filling 200 can be visually recognized. Furthermore, the shavings generated when the filling 200 is cut can be discharged from the opening window 17.

  The notch 18 is formed from the edge of the opening window 17 to the inner wall of the insertion hole 16. By this cutout 18, the padding 200 inserted into the insertion hole 16 can be visually recognized, and it can be confirmed whether or not the padding 200 is correctly inserted into the insertion hole 16. Further, when inserting the filling 200 into the insertion hole 16, the holding portion 12 bends from the opening window 17 and the notch 18 according to the curvature of the filling 200, thereby facilitating insertion of the filling 200 into the insertion hole 16. Can do.

  In addition, a substantially cylindrical grip portion 13 is provided on the back surface portion 12 b of the holding portion 12. A guide plate 21 is provided on the holding portion 12 side of the grip portion 13 in the axial direction. The guide plate 21 is a substantially circular flange that protrudes radially outward from the peripheral surface of the gripping portion 13. The shape of the guide plate 21 is not limited to a substantially circular shape, and may be formed in various other shapes such as a quadrangle and an ellipse. An engaging portion 14 that engages with the guide portion 8 of the cover member 4 is formed between the guide plate 21 and the back surface portion 12 b of the holding portion 12.

  The diameter of the engaging portion 14 is set to be approximately equal to or slightly smaller than the length of the side surface plate 4 e in the guide portion 8 of the cover member 4 in the short direction. On the other hand, the diameter of the guide plate 21 is set to be larger than the length of the side plate 4 e in the short side direction in the guide portion 8. Further, the axial length of the engaging portion 14, that is, the distance between the back surface portion 12 b and the guide plate 21 is set to be approximately equal to or slightly longer than the plate thickness of the side plate 4 e of the cover member 4.

  In addition, although the example which formed the holding part 13 in the substantially cylindrical shape was demonstrated in this example, it is not limited to this, For example, you may form in various other shapes, such as a square pillar and a hexagonal pillar. In other words, the gripping portion 13 may have a shape that can be gripped by the user.

  The thickness of the holding portion 12, that is, the length in the short direction of the front portion 12 a is set to be larger than the length in the short direction of the side plate 4 e in the guide portion 8 of the cover member 4. Moreover, although the example which formed the holding | maintenance part 12 in the substantially rectangular parallelepiped shape was demonstrated in this example, it is not limited to this, For example, you may form in various other shapes, such as a disk shape.

  In addition, in this example, although the pair of holding members 11 and 11 which comprise the support tool 5 were set as the same structure, it is not limited to this, Two holding members 11 and 11 according to the location which cuts the padding 200 11, the shape of the insertion hole 16 may be changed. For example, the insertion hole 16 of the holding member 11 on one side of the pair of holding members 11, 11 may be formed larger than the insertion hole 16 of the holding member 11 on the other side.

2. Operation of Mold Manufacturing Apparatus Next, the cutting operation of the filling 200 using the mold manufacturing apparatus 1 having the above-described configuration will be described with reference to FIGS.
4 is a plan view of the mold manufacturing apparatus 1 shown by cutting the cover member 4, FIG. 5 is a view showing a state in which the holding portion 12 of the holding member 11 is inserted into the cover member 4, and FIG. 6 is a cutting mechanism. FIG. 3 is a diagram showing a state in which the filling 200 is cut by 3.

  First, as shown in FIG. 3, the front portions 12 a of the holding portions 12 of the two holding members 11 and 11 are brought close to each other, and the padding 200 is inserted into the insertion holes 16 of the holding portions 12 of the pair of holding members 11 and 11. To do. Thereby, the stuffing 200 can be supported by the support 5 by the stuffing 200 being sandwiched between the pair of holding members 11, 11. In addition, the user can confirm whether the padding 200 has been inserted to the back of the insertion hole 16 by visually recognizing the notch 18 provided in the upper surface part 12 c of the holding part 12.

  At this time, as shown in FIG. 4, a cutting line L for cutting the padding 200 is disposed in a gap formed between the holding portions 12 of the pair of holding members 11 and 11. The saw blade 3a of the cutting mechanism 3 passes through the gap between the two holding members 11 and 11.

  Next, the user grips the grip portion 13 and causes the side surface portion 12 d of the holding portion 12 of the two holding members 11 to face the insertion window 7 provided on the front plate 4 c of the cover member 4. At this time, the upper surface portion 12 c of the holding portion 12 in the holding member 11 is directed toward the upper surface plate 4 b of the cover member 4.

  Then, as shown in FIGS. 5A and 5B, the holding portions 12 of the two holding members 11, 11 are inserted into the cover member 4 from the insertion window 7. At this time, as shown in FIG. 5A, the grip portion 13 of the holding member 11 passes through the side plate 4 e of the cover member 4. Then, the engaging portion 14 of the holding member 11 is engaged with the guide portion 8 of the cover member 4.

  Here, the width of the engaging portion 14, that is, the distance between the back surface portion 12 b of the holding portion 12 and the guide plate 21 is set to be approximately equal to or slightly longer than the plate thickness of the side plate 4 e of the cover member 4. As shown in FIG. 5B, the diameter of the guide plate 21 is set to be larger than the length of the side plate 4e in the lateral direction of the guide portion 8, and the thickness of the holding portion 12 is the guide of the cover member 4. The length of the side plate 4e in the portion 8 is set larger than the length in the short direction. Therefore, the guide plate 21 comes into contact with the outer wall of the side plate 4e, and the back surface portion 12b of the holding unit 12 comes into contact with the inner wall of the side plate 4e. As a result, the movement of the grip portion 13 in the holding member 11 in the axial direction is restricted.

  Further, the diameter of the engaging portion 14 is set to be substantially equal to or slightly smaller than the length of the side plate 4 e in the short direction of the guide portion 8 of the cover member 4. Therefore, the movement of the side plate 4 e of the cover member 4 in the holding member 11 in the short direction is restricted. Accordingly, the movement of the two holding members 11 and 11 in the direction intersecting the direction in which the guide portion 8 of the cover member 4 extends is restricted, and the direction in which the guide portion 8 extends, that is, the length of the side plate 4e. It can move only in the direction. Therefore, the support 5 that supports the padding 200 can be moved along the longitudinal direction of the side plate 4e without being shaken, and the padding 200 can be cut straight.

  Next, as shown in FIGS. 6A and 6B, the user operates the grip portion 13 of the holding member 11. At this time, the engaging portion 14 of the holding member 11 slides along the guide portion 8 toward the back plate 4 d side, and the holding portion 12 moves to the cutting position by the saw blade 3 a of the cutting mechanism 3. Then, the saw blade 3a of the cutting mechanism 3 is inserted into the gap between the two holding members 11, 11, and the padding 200 supported by the support 5 is cut.

  Next, the holding part 13 is operated to pull out the holding part 12 of the holding member 11 from the cover member 4. Thereby, the cutting | disconnection operation | work of the filling 200 using the manufacturing apparatus 1 is completed, and the half-moon part 201 fixed to the small ball part 101 of the mold 100 can be cut out from the filling 200 (refer FIG. 7B).

  In this example, the cutting mechanism 3 is covered with the cover member 4, and the grip portion 13 of the holding member 11 gripped by the user is disposed outside the cover member 4. Thereby, since a user's hand does not touch the saw blade 3a of the cutting mechanism 3 at the time of a cutting operation, the cutting operation of the filling 200 can be performed safely.

  Further, the cover member 4 is formed of a transparent or semi-transparent material that can be visually recognized, and an opening window 17 that communicates with the insertion hole 16 is provided on the upper surface portion 12 c of the holding portion 12. As a result, the user can perform the cutting operation of the filling 200 while confirming the cutting state of the filling 200.

  The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the spirit of the invention described in the claims.

  DESCRIPTION OF SYMBOLS 1 ... Manufacturing apparatus, 2 ... Work bench, 3 ... Cutting mechanism, 3a ... Saw blade (cutting blade), 4 ... Cover member, 4a ... Opening part, 4b ... Top plate, 4c ... Front plate, 4d ... Back plate, 4e ... side plate, 5 ... support tool, 7 ... insertion window, 8 ... guide part, 11 ... holding member, 12 ... holding part, 12a ... front part, 12b ... back part, 12c ... top part, 12d ... side part, DESCRIPTION OF SYMBOLS 13 ... Holding part, 14 ... Engagement part, 16 ... Insertion hole, 17 ... Opening window, 18 ... Notch, 21 ... Guide plate, 100 ... Mold, 101 ... Kodama part, 200 ... Stuffing, 201 ... Half moon part

Claims (4)

A cutting mechanism for cutting the pad attached to the small ball part of the mold used when molding the multifocal lens;
Covering the cutting mechanism, and a cover member provided with an insertion window, and a guide portion extending from the insertion window to the cutting position of the padding by the cutting mechanism,
A support for supporting the padding,
The support has a pair of holding members that hold the padding in a state where the padding is sandwiched therebetween and a gap through which a cutting blade of the cutting mechanism passes is provided,
The holding member is
A holding portion that holds the padding and is inserted into the cover member from the insertion window;
An apparatus for manufacturing a multifocal spectacle lens molding mold, comprising: a grip portion that penetrates the cover member from the guide portion and is gripped by a user when the holding portion is inserted into the cover member. The said holding member has an engaging part which is provided between the said holding part and the said holding part, and engages with the said guide part of the said cover member, and slides along the said guide part. Manufacturing equipment for molding multifocal spectacle lens. In the holding part of the holding member,
An insertion hole into which the padding is inserted;
The multifocal spectacle lens molding mold manufacturing apparatus according to claim 1, wherein a notch for visually recognizing the padding inserted into the insertion hole is provided. The apparatus for manufacturing a spectacle lens molding mold according to any one of claims 1 to 3, wherein the cover member is formed of a transparent or translucent material.

Images