JP2010194779A - Guide device for inserting mirror surface piece and method for inserting mirror surface piece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To insert a mirror surface piece into a form without hurting a transfer surface even by a less experienced person. <P>SOLUTION: A guide device 60 for inserting the mirror surface piece includes a guide plate 30 fixed to the form 12, a pair of jig bodies 61 attached to the mirror surface piece 40, and a screw 62 for attaching the jig body 61 to the mirror surface piece 40. The guide plate 30 includes a through-hole 32 which communicates with a mounting hole 13 when fixed to the form 12. A positioning recess 31 is formed in the through-hole 32. The jig body 61 includes an engagement part 63 engaged with the positioning recess 31 and a stop hole 64 into which the screw 62 fitted into a screw hole 46 formed in a stopper 44 is inserted and held by the specular piece 40. The specular piece 40 engages the engagement part 63 with the positioning recess 31, and the jig body 61 is detached after the tip of the specular piece 40 is inserted into the mounting hole 13 and inserted into the mounting hole 13 until the transfer surface 41 reaches a prescribed position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an assembly of a mold for molding an optical lens, and more specifically, a mirror piece having a transfer surface for transferring an optical surface shape formed on the entire surface on the front end side is attached to a mounting hole formed in a mold. The present invention relates to an insertion guide device and an insertion method for inserting the mirror piece into the mounting hole without bringing the transfer surface into contact with the insertion port edge of the mounting hole.

  Conventionally, a mold for molding an optical lens is generally constituted by an upper mold and a lower mold as shown in Patent Document 1 below. The upper die and the lower die are positioned by fitting a guide shaft provided on one of the molds into a guide hole provided on the other, and one of them can slide. The upper mold and the lower mold are each provided with a mounting hole into which a mirror piece is inserted, and the mirror piece mounted in the mounting hole is arranged so that the front end surfaces thereof are coaxially opposed when the mold is closed. Positioned. A transfer surface for transferring the optical surface shape is formed on the tip surface of the mirror piece, and a lens molding space is formed between the two transfer surfaces provided on the upper mold and the lower mold.

JP 2008-188815 A

  In the above-described mold assembly, the mirror piece is inserted into the mounting holes formed in the respective molds from the back side when the upper mold and the lower mold are combined. When the tip surface of the mirror piece comes into contact with the edge of the insertion slot, the tip surface is damaged. Here, a transfer surface for transferring the optical surface shape is formed on the tip surface, and scratches on the transfer surface are transferred to the lens to be molded, and the molded lens becomes a defective product. Thus, the insertion of the mirror piece into the mounting hole requires skill. In particular, when the transfer surface is formed on the entire front end surface, the lens may be damaged even if the end surface hits a corner, so that the front end surface does not touch the insertion port. This is a very difficult task for an inexperienced person.

  To solve the problem, the present invention provides a guide device that can insert the mirror piece so that the transfer surface is not damaged without requiring a special technique. We propose a method to insert a mirror piece.

  The mirror surface piece insertion guide device according to the present invention is configured to insert a mirror surface piece, on which the transfer surface for transferring the optical surface shape is formed on the tip side, into the mounting hole formed in the mold frame from the back side of the mold frame. A guide device for guiding the mirror piece so that a center position of the mirror piece coincides with a center position of the mounting hole, the guide piece being fixed to the back side of the mold so as to be integrated with the mold, and having one end side A guide plate having an insertion hole in communication with the mounting hole and having a positioning recess formed on the other end side; a jig body having a fitting portion to be fitted to the positioning recess on the distal end side in the insertion direction; and the jig. A holding means for holding the mirror piece so that the fitting piece is positioned in alignment with the mounting hole by fitting the fitting portion into the positioning recess. The transfer surface is inserted into the mounting hole After being, the jig main body is equal to or be removed from the optical insert. The jig main body is preferably composed of a plurality of parts and can be divided. In this way, the removal work is simplified.

  Alternatively, after the mirror piece is inserted to a predetermined position of the mounting hole without removing the jig body, the mirror piece is fixed to the jig body by a fixing means and the jig body is fixed to the guide plate. You may make it do.

  The method of inserting a mirror surface piece according to the present invention is a method of inserting a mirror surface piece, on which a transfer surface for transferring an optical surface shape is formed on the tip side, into a mounting hole formed in the form frame from the back side of the form frame. A guide plate having an insertion hole having a positioning recess that communicates with the mounting hole at one end and positions the mirror piece at the other end so that the center position is the same with respect to the mounting hole. The mounting hole and the positioning recess are positioned so that their center positions are the same, and are fixed with screws, and a fitting portion that is fitted to the positioning recess is formed on the distal end side in the insertion direction. The mirror piece is temporarily attached to the jig body by the holding means so that the fitting portion fits into the positioning recess and the mirror piece is positioned in alignment with the mounting hole. Fix A second step, a third step of fitting the fitting portion into the positioning recess and inserting the transfer surface into the mounting hole, a fourth step of removing the jig body from the mirror piece, and the transfer The fifth step of inserting the mirror piece into the mounting hole so that the surface is in a predetermined position is sequentially performed. In the fourth step, the jig body may be divided into a plurality of parts and removed.

  Alternatively, from the first step to the third step, the fourth step in which the temporary fixing by the holding means is released and the mirror piece is movable in the insertion direction, and the transfer surface is in a predetermined position. A fifth step of inserting a mirror surface piece into the mounting hole and a sixth step of fixing the mirror surface piece to the jig body and fixing the jig body to the guide plate may be sequentially performed. good.

  According to the present invention, even when an inexperienced person inserts a specular piece into the mounting hole formed in the mold, the transfer formed at the tip of the specular piece at the insertion port edge of the mounting hole. The surface is not brought into contact, and the transfer surface is not damaged.

It is sectional drawing of the lens shaping | molding die (a fixed mold | type and a movable mold | type) by which the mirror surface piece was mounted | worn with the mold using the mirror surface piece insertion guide apparatus by this invention. It is the perspective view which looked at the fixed mold from the lens molding surface side. It is explanatory drawing of the guide apparatus for mirror surface piece insertion by this invention. It is the perspective view which looked at the guide plate to which the mirror piece was fixed from the back side of the lens molding surface. It is sectional drawing of the mirror surface piece to which the jig | tool main body was attached. It is a figure explaining the initial state of the 3rd process of the specular piece insertion method by this invention. It is a figure explaining the state at the time of completion of a 3rd process. It is a figure explaining a 4th process. It is a figure explaining a 5th process. It is explanatory drawing of the guide apparatus for mirror surface piece insertion of another embodiment. It is a figure explaining the 2nd process of the specular piece insertion method by another embodiment. It is a figure explaining the initial state of the 3rd process by another embodiment. It is a figure explaining the state at the time of completion of the 3rd process by another embodiment. It is a figure explaining the 4th process of another embodiment. It is a figure explaining the 5th process of another embodiment. It is a figure explaining the 6th process of another embodiment. It is explanatory drawing of the mirror surface frame insertion guide apparatus which inserts the rectangular mirror surface frame.

  As shown in FIGS. 1 and 2, the lens molding die 10 includes a fixed die 11 and a movable die 21. The fixed mold 11 and the movable mold 21 include mold frames 12 and 22, a guide plate 30 that is integrally fixed to the mold frames 12 and 22 with screws (not shown), and mounting holes 13 that are formed in the mold frames 12 and 22. The guide holes 24 provided at the four corners of the movable die 21 are slidable on the guide shafts 14 embedded in the four corners of the fixed die 11. The fixed mold 11 and the movable mold 21 are configured to be openable and closable. When the mold is closed, the mating surface 15 of the mold 12 and the mating surface 25 of the mold 22 are pressed. The guide plate 30 is fixed to the back side of the molds 12 and 22 (opposite side of the mating surfaces 15 and 25) with screws (not shown). The specular pieces 40 and 50 are inserted into the mounting holes 13 and 23 from the back sides of the mating surfaces 15 and 25, and are positioned on the same axis when the fixed mold 11 and the movable mold 21 are closed. Thus, the transfer surfaces 41 and 51 formed at the respective leading ends face each other, and a molding space 55 is formed therebetween. The molten resin is supplied to the molding space 55 via the sprue 16 formed on the mold 12 and the runner 17 formed on the mating surfaces 15 and 25 to mold the lens.

  As shown in FIG. 3, the mirror piece insertion guide device 60 according to the present invention is a guide device used when the mirror piece main body 42 is inserted into the mounting hole 13 from the transfer surface 41 side. The guide plate 30 is integrally screwed to the frame 12, a jig body 61 attached to the mirror piece 40, and a screw (holding means) 62 that attaches the jig body 61 to the mirror piece 40. The guide plate 30 includes an insertion hole 32 having a center at the same position as the center of the mounting hole 13 when fixed to the mold 12, and a positioning recess 31 on the opposite side of the insertion hole 32 from the mold 12. Is formed. The jig body 61 is used as a pair of two, and includes a fitting portion 63 and a stop hole 64 that fit into the positioning recess 31, and the screw 62 inserted into the stop hole 64 constitutes the mirror piece 40. The jig body 61 is temporarily fixed (held) to the mirror piece 40 by screwing with a screw hole 46 provided in the stopper 44.

  The mirror surface piece 40 has a transfer surface 41 for transferring the optical surface shape formed on the tip side and inserted into the mounting hole, a stopper 44 as a positioning member of the mirror surface body 42, and a stopper 44. The spacer 43 for adjusting the dimension from the transfer surface 41 to the transfer surface 41 is integrated by a screw 45. The stopper 44 is fitted into the positioning recess 31 formed in the guide plate 30 when the mirror piece main body 42 is inserted into the mounting hole 13, and the insertion-side end surface 44 a abuts against the bottom surface 34 of the positioning recess 31 to The position of the transfer surface 41 in the insertion direction is positioned. At this time, the cylindrical surface 44b of the stopper 44 and the cylindrical surface 35 of the positioning recess 31 are formed to have the same size in the insertion direction. Therefore, as shown in FIG. A holding plate 57 that is flush with the guide plate 30 and is screwed to the guide plate 30 with screws 58 covers a part of the end face 44c so that the mirror piece 40 inserted into the mold 12 does not come off. Locked. The mirror surface piece 50 attached to the movable mold 21 is the same except that the transfer surface 51 has a shape different from the transfer surface 41 of the mirror surface piece 40.

  Next, a method of inserting a specular piece using the specular piece insertion guide device 60 will be described in the order of steps. Although the fixed mold 11 will be described here, the same applies to the movable mold 21.

  (First Step) As shown in FIG. 2, the guide plate 30 is fitted into the bowl-shaped recess 19 formed in the mold 12 and fixed with screws (not shown).

  (Second Step) As shown in FIGS. 3 and 5, the screw 62 inserted through the stop hole 64 of the jig main body 61 is screwed into the screw hole 46 provided in the stopper 44 of the mirror surface piece 40, and the jig is repaired. The tool body 61 is attached to the mirror piece 40. Two jig bodies 61 are attached so as to cover almost the entire circumference of the mirror piece 40 in pairs.

  (Third Step) As shown in FIG. 6, the fitting portion 63 of the jig body 61 and the positioning recess 31 of the guide plate 30 are aligned and begin to be fitted. At this time, since the dimension from the front end side of the fitting portion 63 of the jig body 61 to the transfer surface 41 of the mirror piece main body 42 is set to be shorter than the thickness dimension of the guide plate 30, the transfer surface 41 is the mold frame 12. It does not reach the insertion port 18 of the mounting hole 13 formed in the. As shown in FIG. 7, the aligned fitting portion 63 is pushed into the positioning recess 31. Since the mirror surface piece main body 42 and the mounting hole 13 are coaxially positioned by fitting the fitting portion 63 into the positioning recess 31, the transfer surface 41 is inserted into the insertion hole 18 of the mounting hole 13. The tip of the mirror piece main body 42 is inserted into the mounting hole 13 without hitting the edge and being damaged.

  (Fourth Step) As shown in FIG. 8, the jig body 61 is removed from the mirror piece 40 with the tip of the mirror piece main body 42 inserted into the mounting hole 13. Two jig bodies 61 are removed. Note that the number of jig bodies 61 is not limited to two, and may be one set of three or one set of four. However, if the number of jig main bodies 61 is too large, it takes time to remove them.

  (Fifth Step) As shown in FIG. 9, the mirror piece 40 is pushed in until the stopper 44 is fitted in the positioning recess 31 and stopped. The mirror piece main body 42 further enters the mounting hole 13 and the transfer surface 41 is set at a predetermined position.

  In the embodiment, the fitting portion 63 is fitted and inserted into the positioning recess 31, and the transfer surface 41 is inserted into the mounting hole 13 until the fitting is completed by hitting the bottom surface 34 of the positioning recess 31. Although an example in which the transfer surface 41 is inserted is shown, the transfer surface 41 is outside the mounting hole 13 and the center position and posture of the held mirror surface piece 40 are aligned with the mounting hole 13. From this state, the mirror piece 40 may be pushed toward the mounting hole 13, guided and moved by the jig body 61, and inserted into the mounting hole 13.

  Next, another embodiment will be described. Since the mirror piece 40 is the same as that in the above embodiment, the same symbols are used and detailed description is omitted. As shown in FIG. 11, the jig main body 70 is a single part having a cylindrical shape, and a fixing hole for fixing a fitting portion 71 for fitting with the positioning recess 31 and a stopper hole 72 for holding the mirror piece 40. 73. The jig main body 70 is formed with a hole 74 into which the mirror surface main body 42 is inserted at the center of the fitting portion 71, and a stopper hole through which a screw 62 (holding means) is inserted in the cylindrical portion excluding the fitting portion 71. 72 and a fixing hole 73 through which a screw 78 (fixing means) is inserted. Inside the cylindrical portion, the stopper 44 is guided to guide the stopper 44 when the mirror surface main body 42 is inserted into the mounting hole 13. An inner cylindrical surface 75 that helps smooth insertion of the mirror surface piece main body 42 is formed. The screw 62 is screwed into the screw hole 46 and holds the specular piece 40 before being inserted into the mounting hole 13. The screw 78 is inserted into the fixing hole 73 and the hole 81 formed in the fixing plate 80, screwed into the screw hole 46, and fixes the mirror piece 40 after being inserted into the mounting hole 13. The fixing plate 80 is formed in a substantially L shape, and the hole 81 is formed on one side and the hole 82 is formed on the other side. The fixing plate 80 is fixed to the guide plate 30 by screws 84 inserted through the holes 82.

  Next, a method of inserting the mirror piece 40 using the jig body 70 will be described in the order of steps.

  (First Step) As shown in FIG. 2, the guide plate 30 is fixed to the mold 12 with screws (not shown).

  (Second Step) As shown in FIG. 12, the mirror piece main body 42 is inserted into the hole 74 of the jig main body 70, and the screw 62 inserted through the stop hole 72 is provided in the stopper 44 of the mirror piece 40. The mirror surface piece 40 is held by the jig body 70 by being screwed into the screw hole 46.

  (Third Step) As shown in FIG. 13, the fitting portion 71 of the jig body 70 and the positioning recess 31 of the guide plate 30 are aligned and begin to fit. At this time, since the dimension from the front end side of the fitting portion 71 of the jig main body 70 to the transfer surface 41 of the mirror piece main body 42 is set to be shorter than the thickness dimension of the guide plate 30, the transfer surface 41 is formed on the mold 12. It does not reach the insertion port 18 of the mounting hole 13 formed in the. As shown in FIG. 14, the aligned fitting portion 71 is pushed into the positioning recess 31. Since the mirror surface piece main body 42 is coaxially positioned by fitting the fitting portion 71 into the positioning recess 31, the transfer surface 41 is inserted into the insertion hole 18 of the attachment hole 13. The tip of the mirror piece main body 42 is inserted into the mounting hole 13 without hitting the edge and being damaged.

  (Fourth Step) As shown in FIG. 15, the screw 62 is removed from the jig main body 70 in a state where the tip of the mirror surface main body 42 is inserted into the mounting hole 13.

  (Fifth Step) As shown in FIG. 16, the mirror surface piece 40 is pushed in as far as the stopper 44 is guided by the inner cylindrical surface 75. The mirror piece main body 42 penetrates deeply through the mounting hole 13 and the transfer surface 41 is set at a predetermined position.

  (Sixth Step) As shown in FIG. 17, the mirror piece 40 inserted at a predetermined position of the mold 12 is fixed to the jig body 70 with screws 78. The screw 78 is inserted into the hole 81 formed in the fixing plate 80 and the fixing hole 73 of the jig body 70 and screwed into the screw hole 46. A screw 84 is inserted into a hole 82 formed in the fixing plate 80 and is screwed to the guide plate 30 by the screw 84.

  In the above embodiment, the lens to be molded is described as being circular, but there is also a lens having a rectangular shape like a finder lens of a camera. In that case, for example, as shown in FIG. 18, the mirror piece main body 42b of the mirror piece 40b and the transfer surface 41b formed on the tip side thereof are also rectangular, and the mounting hole 13b formed in the mold 12b is also a guide plate. Since the positioning recess 31b formed in 30b is also rectangular, the fitting portion 63b formed in the jig body 61b may be rectangular. Other configurations and insertion methods are the same as those in the above embodiment.

  The mirror piece insertion guide device 60 according to the present invention can be used as it is even when the size of the lens molded by the molding die is changed. When the size of the lens is changed, the size of the mirror piece main body 42 is changed, so that the size of the mounting hole 13 is also changed. Therefore, the mold 12 is reworked or is replaced with another mold. Become. However, the positioning recess 31 for positioning and fixing the mirror piece 40 is provided in the guide plate 30 and the stopper 44 fitted therein does not need to be changed even if the size of the mirror piece main body 42 is changed. The positioning recess 31 does not need to be changed, and the guide plate 30 can be removed from the mold 12 and used repeatedly. The jig main body 61 is not changed as long as there is a margin in the portion through which the specular frame main body 42 is inserted, and this can also be used repeatedly.

  In the above embodiment, the multi-cavity mold has been described, but a single-cavity mold or a mold press mold may be used.

DESCRIPTION OF SYMBOLS 10 Lens shaping die 11 Fixed mold 12, 12b, 22 Mold frame 13, 13b Mounting hole 21 Movable mold 30, 30b Guide plate 31, 31b Positioning recessed part 40, 40b, 50 Mirror surface piece 41, 41b, 51 Transfer surface 42, 42b Mirror surface piece main body 43 Spacer 44 Stopper 45, 58 Screw 46 Screw hole 55 Molding space 60 Mirror surface piece insertion guide device 61, 61b, 70 Jig body 62 Screw (holding means)
63, 63b, 71 Fitting portion 64, 72 Stop hole 73 Fixing hole 74 Hole 75 Inner cylinder surface 78, 84 Screw (fixing means)
80 Fixing plate (fixing means)

Claims (6)

When the mirror surface piece having the transfer surface for transferring the optical surface shape formed on the front end side is inserted into the mounting hole formed in the mold frame from the back side of the mold frame, the center position of the mirror surface piece is the position of the mounting hole. A guide device for guiding the mirror piece so as to coincide with a center position,
A guide plate having an insertion hole fixed on the back side of the mold so as to be integrated with the mold, one end communicating with the mounting hole and a positioning recess formed on the other end;
A jig body in which a fitting portion that fits with the positioning recess is formed on the distal end side in the insertion direction;
A holding means for holding the specular piece so that the specular piece is aligned with the mounting hole and positioned by fitting the fitting portion into the positioning recess;
Consisting of
The mirror piece insertion guide device, wherein the jig body is removed from the mirror piece after the transfer surface is inserted into the mounting hole.   The mirror piece insertion guide device according to claim 1, wherein the jig main body is divided into a plurality of parts and removed. When the mirror surface piece having the transfer surface for transferring the optical surface shape formed on the front end side is inserted into the mounting hole formed in the mold frame from the back side of the mold frame, the center position of the mirror surface piece is the position of the mounting hole. A guide device for guiding the mirror piece so as to coincide with a center position,
A guide plate having an insertion hole which is fixed to the back side of the mold so as to be integrated with the mold, and has one end connected to the mounting hole and a positioning recess formed on the other end;
A jig body in which a fitting portion that fits with the positioning recess is formed on the distal end side in the insertion direction;
A holding means for holding the specular piece so that the specular piece is aligned with the mounting hole and positioned by fitting the fitting portion into the positioning recess;
Fixing means for fixing the mirror piece inserted to a predetermined position of the mounting hole to the jig body and fixing the jig body to the guide plate;
A mirror surface piece insertion guide device characterized by comprising: A method of inserting a mirror piece formed with a transfer surface for transferring an optical surface shape on the front end side into a mounting hole formed in the mold frame from the back side of the mold frame,
A guide plate having an insertion hole having a positioning recess on one end side communicating with the mounting hole and positioning the mirror piece on the other end side so as to have the same center position with respect to the mounting hole. First, the mounting hole and the positioning recess are positioned so that their center positions are the same, and are fixed with screws.
The mirror piece is axially aligned with the mounting hole by fitting the fitting portion into the positioning recess in a jig body in which a fitting portion that fits with the positioning recess is formed on the distal end side in the insertion direction. A second step of detachably temporarily fixing the mirror piece by the holding means so as to be positioned;
A third step of fitting the fitting portion into the positioning recess and inserting the transfer surface into the mounting hole;
A fourth step of removing the jig body from the mirror piece;
A fifth step of inserting the mirror piece into the mounting hole so that the transfer surface is in a predetermined position;
Are sequentially performed.   5. The method of inserting a specular piece according to claim 4, wherein in the fourth step, the jig main body is divided into a plurality of parts and removed. A method of inserting a mirror piece formed with a transfer surface for transferring an optical surface shape on the front end side into a mounting hole formed in the mold frame from the back side of the mold frame,
A guide plate having an insertion hole having a positioning recess on one end side communicating with the mounting hole and positioning the mirror piece on the other end side so as to have the same center position with respect to the mounting hole. First, the mounting hole and the positioning recess are positioned so that their center positions are the same, and are fixed with screws.
The mirror piece is axially aligned with the mounting hole by fitting the fitting portion into the positioning recess in a jig body in which a fitting portion that fits with the positioning recess is formed on the distal end side in the insertion direction. A second step of detachably temporarily fixing the mirror piece by the holding means so as to be positioned;
A third step of fitting the fitting portion into the positioning recess and inserting the transfer surface into the mounting hole;
A fourth step of releasing the temporary fixing by the holding means and making the mirror piece movable in the insertion direction;
A fifth step of inserting the mirror piece into the mounting hole so that the transfer surface is in a predetermined position;
A sixth step of fixing the mirror piece to the jig body and fixing the jig body to the guide plate;
Are sequentially performed.

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