JP4529698B2 - Lens holding jig - Google Patents

Description

  The present invention relates to a lens holding jig used for immersing a lens in a treatment liquid such as a hard coat liquid.

  Since plastic spectacle lenses are easily scratched, a hard coat film that imparts scratch resistance is formed. As a method for forming a hard coat film on a lens, a method is generally used in which a primer solution and a hard coat solution are applied to the surface of a lens having both surfaces processed into a predetermined lens surface shape, and then dried and cured. The primer solution is applied according to the specifications of the hard coat film in order to improve the adhesion between the lens and the hard coat film, and improve the impact resistance. In addition, as a method for applying the primer solution and the hard coat solution to the lens, a spin coating method, a dipping method, or the like is used. From the viewpoint of productivity, the dipping method is the mainstream.

In the conventional dipping method, the lens is mounted on a lens holding jig capable of mounting several tens of lenses at a time, and the lens is immersed in the processing solution together with the lens holding jig, and then lifted after a predetermined time, and the lens holding jig is fixed. A method of drying with the lens attached to the tool is used.
However, as for the lens holding jig for mounting a large number of lenses, various types of lens holding jigs are prepared according to the lens diameter and the side thickness (edge thickness) of the lens, and the lens holding according to the lens diameter and edge thickness. Since it is necessary to select a jig, there is a problem that equipment costs increase and management becomes complicated. Further, in recent years, the number of custom-made lenses has increased, and in order to cope with a wide variety and a small lot, there has been a remarkable problem that the filling rate of the lenses mounted on the lens holding jig is lowered.
In order to cope with such a problem, the applicant of the present invention has a coil holding spring and holds at least three places: a side holding portion that holds the left and right end edges of the lens, and a lower holding portion that holds the lower end edge of the lens. A leaf-type lens holding jig has been proposed (see Patent Document 1).

JP 2004-268013 A

  According to this lens holding jig, the lens holding part is formed of a coil spring, so that various types of lenses having different lens shapes, diameters, thicknesses, etc. can be held by one type of lens holding jig. Can do. In addition, because it is a leaf type that holds one lens, it is possible to hang many types of lenses held by a lens holding jig on one transport jig and immerse them in various processing solutions, etc. Can handle small lots.

However, when using a treatment liquid using a solvent with a large amount of water, repelling (a phenomenon in which the thickness of the primer liquid and the hard coat liquid becomes thin, that is, uneven thickness) occurs on the lens surface in contact with the side holding part. It is allowed to occur. This phenomenon is caused by the fact that the surface tension increases due to the large amount of water in the processing liquid, and the contact area between the lens and the lens holding jig is wide, so that the surface tension when pulling up from the processing liquid causes It is assumed that the amount of the processing liquid that is attracted increases. When repellency occurs, the repellency part will enter the lens shape that is framed into the spectacle frame, so the appearance quality of the lens is impaired. Especially, elliptical non-circular lenses that thin the entire convex lens, etc. In this case, there is little margin in the distance between the target lens shape and the edge of the lens, which causes a decrease in yield.
That is, it is necessary to improve the lens holding portion, particularly the side holding portion of the existing lens holding jig.

  The present invention has been made in view of such circumstances, and a lens holding unit that can reduce the occurrence of lens appearance defects as much as possible in a lens holding unit, particularly a side holding unit that holds the left and right edges of the lens. An object is to provide a jig.

In order to solve the above-described problems, a lens holding jig according to the present invention includes a side holding portion that holds left and right end edges of a lens having end edges arranged in the vertical direction, and a lower side that holds the lower end edge of the lens. In the lens holding jig used for holding the lens by at least three holding parts of the holding part and immersing the lens in the liquid, the side holding part is inclined first and extends downward. A vertically extending portion is formed, bent at a substantially right angle with respect to the first vertically extending portion, a second vertically extending portion extending upwardly and extending is formed, and bent upward from the second vertically extending portion. A third vertically extending portion that is inclined upward and extends to abut the edge of the lens, and is bent upward from the third vertically extending portion so as to be separated from the lens surface side of the lens. Inclined and stretched to contact the edge of the lens L 4 vertically extending portion is formed, has a third vertical extending portion and the V-shaped holding portion formed by the fourth upper and lower extending portion, in accordance with the third vertical extending portion is directed downward of the lens, The lens is separated from the lens surface.

According to this, as the third vertically extending portion moves downward, it is separated from the lens surface of the lens, so that when the lens holding jig is pulled out of the liquid, the liquid (processing liquid) ) Flows along the third vertically extending portion integrated with the V-shaped holding portion without flowing down the lens surface, thereby preventing the occurrence of defective appearance of the lens. In the holding part shape of the present invention, a liquid film is formed between the lens and the side holding part (V-shaped holding part), but when the film bounces, one part of the lower part of the second vertically extending part is formed. Since the part is immersed in the liquid, the film is attracted to the liquid surface side along the second vertically extending part , and does not scatter on the lens surface, thereby preventing appearance quality defects.

Moreover, the lens holding jig of the present invention is characterized in that the V-shaped holding portion and the vertically extending portion are integrally formed by bending a wire.
According to this, since the V-shaped holding part and the vertically extending part of the side holding part are integrally formed by bending the wire, the side holding part reduces the amount of treatment liquid attached, A uniform treatment film can be formed on the lens surface including the vicinity of the lens edge in contact with the side holding portion.

Further, the lens holding jig according to the present invention includes a conveyance fixing part mounted on the conveyance jig and the side holding part provided on each of the plurality of arms coupled to the conveyance fixing part. It is preferable to support and hold the edge of the lens.
According to this, the lens holding jig is composed of a conveyance fixing part mounted on the conveyance jig and a holding part provided on each of the plurality of arms coupled to the conveyance fixing part. Since the lens is held while supporting the edge, it is possible to suppress the occurrence of a lens appearance defect of the leaf-type lens holding jig as much as possible by applying it to the leaf-type lens holding jig.

The lens holding jig according to the present invention, a lens holding jig, said being acutely bent through the coil spring from the conveyance fixing unit, with so as to contact the edge of the lens by the coil spring to the distal end side A first arm having a biased first side holding portion; and a second side holding portion abutting on an edge opposite to an edge of the lens with which the first side holding portion abuts. A lower arm that abuts a lower edge of the lens between a second arm and an edge of the lens that contacts the first side holding portion and an edge of the lens that contacts the second side holding portion. It is preferable to have a 3rd arm provided with a side holding part.
According to this, since the lens holding part has the coil spring, it can cope with the difference in the diameter of the lens, so that various types of lenses can be held by one type of lens holding jig regardless of the lens diameter.

Hereinafter, embodiments of the lens holding jig of the present invention will be described with reference to the drawings.
The lens holding jig of the present invention is used for immersion treatment such as hard coat film formation of a lens having a thin side surface (edge) or a lens having a sharp edge like a blade edge.

An embodiment of the lens holding jig of the present invention having an improved side holding portion will be described with reference to FIGS. In addition, this lens holding jig is shown by the case where it applies to every leaf type as an example.
1A and 1B are configuration diagrams showing a lens holding jig according to the present invention in which an edge is arranged in the vertical direction, that is, holding a vertical lens, (a) is a front view, and (b) is a lens holding. It is a bottom view of a part.

  In FIG. 1, a lens holding jig 1 is entirely made of stainless steel, and a lens holding portion 2 for holding a lens L arranged vertically supports the lens holding jig 1 and is mounted on a conveying jig. It has a structure that is coupled to a transport fixing unit 3 that is detachably mounted.

  The conveyance fixing part 3 has a spring part 300 that can be attached and fixed to a conveyance jig 600 shown in FIG. The spring portion 300 is formed in a spring shape by bending a wire having a circular cross section at an acute angle, and finger hooks 301 and 302 having a wire shape in a circular shape are provided at both opposing end edges. A curved portion 303 is formed on a part of the spring portion 300 so as to be curved outward and project.

  The lens holding portion 2 is coupled to the lower end of the spring portion 300 that expands and contracts in the vertical direction by welding or the like. The lens holding unit 2 includes a first arm 21, a second arm 22, and a third arm 23 whose distal ends are free ends. The first arm 21, the second arm 22, and the third arm 23 are basically composed of a wire having a substantially circular cross section. As the wire diameter of the wire constituting the first arm 21, the second arm 22, and the third arm 23, a thin wire having a diameter of about 1.5 mm to 2.5 mm is used. The lens holding jig 1 has a structure in which the first arm 21 and the second arm 22 are integrally formed by bending one wire, and the third arm 23 is joined to the second arm 22. It has become.

  The first arm 21 is folded at an acute angle from the horizontal direction diagonally downward from the one end edge of the horizontal arm 211 joined to the spring portion 300 via the first coil spring 212 as biasing means. The first inclined portion 213 that is folded and inclined obliquely to the right side of FIG. 1 (in this specification, the left and right are based on the drawing) is slightly on the right side of the lens L and slightly inward from the vertical direction. The first vertical portion 214 is bent and extends slightly inclined inward from the vertical direction, and its tip is positioned near the center right end edge of the lens L. The distal end portion of the first arm 21 is formed flat by a press or the like and is provided with an attachment portion 215, and a later-described joining portion of the first side holding portion 41 is joined to the attachment portion 215.

The second arm 22 is folded at an acute angle obliquely downward from the horizontal direction through a second coil spring 221 as an urging means from one end edge of the horizontal arm 211. The second inclined portion 222 that is folded and inclined obliquely to the left in FIG. 1 is bent slightly inward from the vertical direction on the left side of the lens L, and slightly inclined inward from the vertical direction. The second vertical portion 223 is arranged such that the tip thereof is positioned in the vicinity of the center left end edge of the lens L. The distal end portion of the second arm 22 is formed flat by a press or the like, as with the first arm 21, and is provided with an attachment portion 225, and the joint portion of the second side holding portion 42 is joined to the attachment portion 225. .
The first side holding part 41 and the second side holding part 42 will be described in detail later.

  The third arm 23 is parallel to the second inclined portion 222 of the second arm 22 and has a gap with the second inclined portion 222 so as to sandwich the first inclined portion 213 of the first arm 21. It has the 3rd inclination part 232 joined to the 2nd coil spring 221 vicinity and the front end side of the 2nd inclination part 222, respectively. The third inclined portion 232 is a third vertical portion 233 which is bent in the vertical direction slightly outside the second vertical portion 223 of the second arm 22 and extends slightly inclined inward from the vertical direction. . The third vertical portion 233 is further bent along the lens L on the lower left side of the lens L to form a fourth inclined portion 234. The fourth inclined portion 234 is bent near the horizontal along the edge of the lens L below the lens L to form a fifth inclined portion 235. Further, the distal end portion of the fifth inclined portion 235 is bent in a substantially vertical direction toward the lens L center side, the distal end is formed flat by a press or the like, and a V-shaped cutout portion is provided. A lower holding portion 43 is formed. The lower holding portion 43 is positioned slightly closer to the second arm 22 at the edge below the lens L.

  In the lens holding jig 1, the first inclined portion 213 of the first arm 21 intersects with the second inclined portion 222 of the second arm 22 and the third inclined portion 232 of the third arm 23. As a result, the movement of the first arm 21 toward and away from the lens L end edge is regulated as a guide by the second inclined portion 222 of the second arm 22 and the third inclined portion 232 of the third arm 23, so It is ensured that the movement of one arm 21 on the plane is substantially parallel to the edge of the lens L.

  Next, the structure of the 1st side holding | maintenance part 41 and the 2nd side holding | maintenance part 42 is demonstrated with reference to FIG. FIG. 2 is an enlarged partial explanatory view of the joint portion of the first side holding portion 41 in FIG. 1, (a) is a front view, (b) is a right side view, and (c) is a top view. In addition, the 1st side holding | maintenance part 41 and the 2nd side holding | maintenance part 42 are the same shape (symmetrical shape with respect to the vertical centerline of the lens hold | maintained).

  The first side holding portion 41 and the second side holding portion 42 are each formed integrally by bending a thin stainless steel round bar. The first side holding part 41 has a joining part 401 extending in the vertical direction joining to the attachment part 215 of the first arm 21.

  The first side holding portion 41 is bent at the lower end edge of the joint portion 401 toward the right end edge (edge surface) side of the lens L, and downwardly away from the lens surface of the lens L, and inclined downward to the left. A first vertically extending portion 402 is formed, is bent from the first vertically extending portion 402 to the edge surface side of the lens L at a substantially right angle with respect to the first vertically extending portion 402, and is inclined to the upper left side. A second vertically extending portion 403 is formed, and is bent upward from the second vertically extending portion 403 to the lens surface side of the lens L, tilted upward on the left side, and extended to contact with the edge surface of the lens L. An extending portion 404 is formed. Further, a fourth vertically extending portion 405 is formed which is bent upwardly away from the lens surface side of the lens L from the third vertically extending portion 404 and is inclined and extended upward on the left side and comes into contact with the edge surface of the lens L. Yes. A V-shaped bent portion formed by the third vertical extending portion 404 and the fourth vertical extending portion 405 forms a V-shaped holding portion 406 that holds the lens L, and is near the center right edge of the lens L. Is located.

  In other words, the lens L is held by the V-shaped holding portion 406, and the fourth vertical extending portion 405 and the V-shaped holding portion 406 are supported by the third vertical extending portion 404 that extends downward and extends, and the third vertical extending portion. The portion 404 is supported by a second vertically extending portion 403 that extends downward and extends, and the second vertically extending portion 403 is supported by a first vertically extending portion 402 that extends and extends upward, and the first vertically extending portion 402. Is supported by the joint 401.

  Therefore, all the vertical extending parts of the first vertical extending part 402 to the fourth vertical extending part 405 forming the first side holding part 41 are inclined downward with respect to the vertical direction. Further, as shown in FIGS. 2A and 2C, the V-shaped holding portion 406 is inclined with respect to the edge portion (edge surface) of the lens L to hold the lens L, and is held in a V-shape. The fourth vertically extending portion 405 forming the portion 406 is separated from the lens surface of the lens L as it goes above the lens L, and the third vertically extending portion 404 is separated from the lens surface of the lens L as it goes below the lens L. ing.

  Next, a method for using the lens holding jig 1 will be described. The operation of holding the lens L on the lens holding jig 1 includes, for example, the first inclined portion 213 that is inclined after intersecting the second arm 22 of the first arm 21 with the second coil spring 221 side of the second arm 22. The first arm 21 is opened widely by pulling it with a finger, the end edge of the lens L is brought into contact with the lower holding portion 43 and the second side holding portion 42 (V-shaped holding portion 406), and then the first coil spring The first side holding portion 41 (V-shaped holding portion 406) at the tip of the first arm 21 may be brought into contact with the lens L edge according to the urging force of 212.

  Thereby, as shown in FIG. 1A, the lens L is pressed slightly by the first side holding portion 41 at the right side edge slightly above the horizontal center line of the lens L, and slightly from the horizontal center line of the lens L. The second side holding portion 42 presses the upper left edge, and the lower holding portion 43 holds the left edge slightly from the vertical center line of the lens L on the lower side surface. The holding portion 41, the second side holding portion 42, and the lower holding portion 43 are held by three-point support. The lens L is preferably set with the first side holding portion 41 and the second side holding portion 42 (fourth vertically extending portion 405) having the convex side as the tip side. This makes it easy to attach the lens L to the lens holding jig 1 when the curvature of the convex surface forming the lens surface is large, and reduces the scratches on the lens surface.

  In the lens holding jig 1, the first arm 21 is bent at an acute angle via the first coil spring 212, and the second arm 22 is bent at an acute angle via the second coil spring 221. Since the strokes of the first side holding part 41 and the second side holding part 42 are long and the movable range is wide, the outer diameter of the lens L in a wide range can be accommodated, and the lens can be attached during the operation of mounting the lens L. The risk of scratching is reduced.

  A plurality of lens holding jigs 1 are used by attaching the conveyance fixing portion 3 to the conveyance jig shown in FIG. In the conveying jig 600, rectangular plate-like alignment plates 602 and 603 are integrally provided at both end edges of the spindle rod 601 in the direction orthogonal to the axial direction and in the horizontal direction. A transfer plate 604 having a V-shaped cross section is integrally provided inside both sides from 603 so as to sandwich the spindle rod 601 from below. Further, a vertical fishing rod 605 is integrally provided on the inner side of both sides of the transfer plate 604 of the main shaft rod 601, and the inverted V-shape as shown in FIG. 3B is integrated with the fishing rod 605. A mounting portion 606 having a cross section is provided substantially parallel to the spindle 601. In this mounting portion 606, through holes 607 that are elongated in the vertical direction as shown in FIG. 3B are provided at predetermined intervals so as to penetrate both walls of the inverted V-shaped mounting portion 606 in the horizontal direction. Yes.

  The upper and lower finger hooks 301 and 302 of the spring part 300 of the transport fixing part 3 are sandwiched between the thumb and the index finger and the spring part 300 is slightly compressed while inserting the tip of the spring part 300 into the through hole 607 of the transport jig 600. When released, the curved portion 303 of the spring portion 300 is pressure-bonded to the upper ends of the reverse V-shaped through holes 607 as shown in FIG. As a result, the spring portion 300 presses the upper and lower ends of the through hole 607 with an urging force that the spring portion 300 tries to expand up and down, and both ends of the bending portion 303 press the inner surface of the upper end of the through hole 607. It is attached to the through hole 607. The mounted spring part 300 is free from backlash and does not come off and is held stably. When the spring part 300 is removed from the mounting part 606, the spring part 300 is inserted into the through hole by applying a force against the urging force of the spring part 300 so as to reduce the distance between the finger hook parts 301 and 302 on both sides and reducing the vertical width. Easily exit from 607. In this way, the transport fixing unit 3 can be attached to and detached from the transport jig 600.

  A plurality of lens holding jigs 1 can be collectively conveyed by one conveyance jig 600 by attaching and suspending the conveyance fixing parts 3 of the plurality of lens holding jigs 1 to the mounting part 606 of the conveyance jig 600. it can. In a state where the plurality of lens holding jigs 1 are mounted on the conveyance jig 600, the lens L is immersed in a processing solution (primer solution and hard coat solution) and pulled up after a predetermined time.

  The treatment liquid is a primer liquid for improving the adhesion of the hard coat layer, and about 60% methanol and 30% water are used as a solvent for each of the solid content of about 5% polyester resin and titanium oxide. The treatment solution was used. Further, as the hard coat solution, a treatment solution using about 60% methanol and several percent of water as a solvent for the main solid content of about tens of percent each of the silane cup agent and titanium oxide was used.

  When the lens holding jig 1 is pulled up from the processing liquid, the first arm 21, the second arm 22, the third arm 23, the first side holding part 41, the second side holding part 42 of the lens holding jig 1, The treatment liquid adhering to the lower holding portion 43 and the lens L flows down. At this time, the V-shaped holding part is formed by forming the first side holding part 41 and the second side holding part 42 from the V-shaped holding part 406 to the first vertically extending part downward. Since the liquid flows downward through the third vertical extending portion 404 and the second vertical extending portion 403 integrated with 406, no liquid pool is generated and the liquid does not flow down the lens L surface.

  Further, since the third vertically extending portion 404 moves away from the lens surface as it goes downward of the lens L, the contact area between the lens L and the side holding portions 41 and 42 is small, and the water content of the processing liquid is large. Accordingly, the amount of the processing liquid drawn to the side holding portions 41 and 42 by the surface tension becomes very small, and repelling (a phenomenon in which the thickness of the processing liquid becomes thin) is difficult.

The third vertically extending portion 404 and the second vertically extending portion 403 function as a discharge path for the liquid accumulated in the V-shaped holding portion 406, and the length thereof is preferably 2 mm or more.
Moreover, it is preferable that the wire diameters of the wires forming the first side holding part 41 and the second side holding part 42 are as thin as possible in order to reduce the amount of processing liquid attracted to each holding part. Each holding part can be formed as a separate body, but it is preferable that a single wire is bent and formed integrally. If it is configured as a separate body, it must be fixed (bonded) by welding or the like, and an uneven portion may be formed at the fixed location, thereby possibly preventing the flow of the processing liquid.

Then, after the lens holding jig 1 is pulled up from the processing liquid, the processing liquid is drained, transported to a drying furnace or the like, and dried to form a hard coat film on the lens surface of the lens L.
In the lens holding jig 1 that has been processed, the first arm 21, the second arm 22, and the third arm 23 are formed of a wire having a circular cross section, thereby minimizing the surface area and the amount of hard coat liquid attached. In addition, since the deposits are easily detached by washing, it can be easily washed.

  As described above, as a result of dipping the hard coating liquid onto the lens L using the lens holding jig 1, the appearance defect due to uneven flow on the surface of the lens L is extremely low compared to the case where the conventional lens holding jig is used. It was confirmed that there were fewer.

In the above embodiment, the case where the hard coat film formation of the plastic lens is performed by the dipping method is exemplified, but the treatment liquid is not limited to the hard coat liquid.
Moreover, although the case where the lens holding jig 1 holds the circular lens L has been described as an example, it may be a case where a non-circular lens is held.

  Further, the lower holding portion 43 has been described in the case where the tip of the third arm 23 (the fifth inclined portion 235) is formed flat by a press or the like and is provided with a V-shaped cutout portion. The form of a lower holding part may be sufficient. FIG. 4A to FIG. 4D are perspective views of other lower holding portions.

  In FIG. 4A, the lower holding portion 10 has a structure in which auxiliary plates 12 are provided at both end edges of the support plate 11. The support plate 11 has a rectangular shape whose long side extends in the vertical direction, and includes a V-shaped cutout portion 110 that supports the edge of the side surface of the lens and the sharp edge at the upper end of the support plate 11. The support plate 11 is bent in a substantially vertical direction so that the tip of the fifth inclined portion 235 of the third arm 23 faces the center side of the lens L, and is joined to a mounting portion 236 formed flat by a press or the like. Has been. Two rectangular auxiliary plates 12 having substantially the same length and width as the support plate 11 are arranged such that the long side extends in the vertical direction and the short side is orthogonal to the support plate 11 on the opposite side of the mounting portion 236. Are provided integrally at both end edges of the support plate 11. The support plate 11 and the auxiliary plates 12 on both sides are formed in a U-shaped horizontal cross section. That is, the support plate 11 and the auxiliary plates 12 on both sides are integrally formed with an intersection angle of approximately 90 °. The support plate 11 and the auxiliary plate 12 are integrally formed by bending a plate material. Further, the support plate 11 and the auxiliary plate 12 are formed of thin stainless steel plates.

  The lower holding part 10 configured in this way has no structure that prevents the liquid from flowing down in the vertical direction, and the liquid after the immersion is good. On the other hand, it is easy for the liquid to collect in the corners extending in the vertical direction where the support plate 11 and the auxiliary plate 12 intersect at an orthogonal angle. Therefore, the lower holding portion 10 in which the auxiliary plate 12 is provided on the support plate 11 has a large liquid holding force and is on the surface of the end portion of the lens L where the lower holding portion 10 is in contact with the liquid accumulated in the corner. It is considered that the liquid film is attracted and the liquid pool is less likely to be generated. Further, since the lower holding portion 10 has a structure in which the support plate 11 and the auxiliary plate 12 are integrally formed by bending a plate material, the auxiliary plate 12 can be easily provided on the support plate 11. . The auxiliary plate 12 also has a function of reinforcing the thin support plate 11 and making it difficult to bend.

  Further, the lower holding portion 10b shown in FIG. 4B has substantially the same structure as that shown in FIG. 4A, but the auxiliary plate 12b is longer than the support plate 11b. The lower part protrudes downward from the support plate 11b.

  Moreover, the lower holding part 10c shown in FIG.4 (c) is the width | variety of the two auxiliary | assistant board | plates 12c of rectangular shape in the both ends edge of the rectangular support board 11c by which a long side is arrange | positioned along an up-down direction. The shape is such that the center line part of the direction is joined, and the support plate 11c and the auxiliary plate 12c are combined in a substantially H-shaped horizontal section. Since the lower holding portion 10c has four corners where the support plate 11c and the auxiliary plate 12c intersect, the liquid holding force is larger than that of the lower holding portion 10 shown in FIG. It is excellent in the effect of preventing the liquid pool phenomenon.

  Furthermore, the basic structure of the lower holding portion 10d shown in FIG. 4 (d) is the same as that shown in FIG. 4 (a), but there are a plurality of parts extending over the entire length in parallel with the vertical direction of the auxiliary plate 12d. It has a structure with zigzag bends. The lower holding portion 10d has a higher liquid holding force because the vertical grooves provided in the auxiliary plate 12d can hold the liquid in addition to the corner where the support plate 11d and the auxiliary plate 12d intersect. It is excellent in the effect of preventing the liquid pool phenomenon.

  In addition, the lower holding portion may be provided with a large number of auxiliary plates in a fin shape, or the support plate and the auxiliary plate may be formed in a rectangular tube shape. Furthermore, since it is only necessary to form a corner where the support plate 11 and the auxiliary plate 12 intersect, the intersection angle between the support plate 11 and the auxiliary plate 12 is not limited to 90 °.

It is a block diagram which shows the lens holding jig of this invention, (a) is a front view, (b) is a bottom view of a lens holding part. It is the partial explanatory view which expanded the joined part of the 1st side maintenance part, (a) is a front view, (b) is a right view, (c) is a top view. An embodiment of a conveyance jig is shown, (a) is a side view, (b) is a sectional view showing the state where a spring part was inserted in a mounting part. (A)-(d) is a perspective view of another lower holding | maintenance part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lens holding jig, 2 ... Lens holding part, 3 ... Conveyance fixing | fixed part 10, 10b, 10c, 10d ... Lower side holding part, 11 ... Support plate, 12 ... Auxiliary plate, 21 ... 1st arm, 22 ... 2nd arm, 23 ... 3rd arm, 41, 42 ... Lateral holding part, 43 ... Lower holding part, 401 ... Joining part, 402 ... 1st up-and-down extending part, 403 ... 2nd up-and-down extending part, 404 ... V A third vertically extending portion that forms a letter-shaped holding portion, 405... A fourth vertically extending portion that forms a V-shaped holding portion, 406... A V-shaped holding portion, 600.

Claims (4)

The lens is held by at least three holding portions, that is, a side holding portion that holds the left and right end edges of the lens having the edge arranged in the vertical direction and a lower holding portion that holds the lower edge of the lens. In the lens holding jig used to immerse the lens in the liquid,
The side holding portion is formed with a first vertical extending portion that is inclined downward and extended, and is bent at a substantially right angle with respect to the first vertical extending portion, and is extended upwardly and inclined. A third vertical extending portion that is bent upward from the second vertical extending portion and tilted upward and is in contact with the edge of the lens is formed. The lens is bent upwardly away from the lens surface side of the lens and is inclined and extended upward, and a fourth vertically extending portion that contacts the edge of the lens L is formed.
A V-shaped holding portion formed by the third vertically extending portion and the fourth vertically extending portion ;
The lens holding jig, wherein the third vertically extending portion is separated from the lens surface of the lens as it goes downward of the lens. The lens holding jig according to claim 1,
The lens holding jig, wherein the V-shaped holding portion and the vertically extending portion are integrally formed by bending a wire. The lens holding jig according to claim 1,
Supporting and holding the edge of one lens by the conveyance fixing part mounted on the conveyance jig and the side holding parts respectively provided on the plurality of arms coupled to the conveyance fixing part. A lens holding jig. The lens holding jig according to claim 3,
The lens holding jig includes a first side holding portion that is bent at an acute angle from the conveyance fixing portion via a coil spring and biased to abut on the edge of the lens by the coil spring on the tip side. A first arm, a second arm having a second side holding portion that comes into contact with an edge opposite to an end edge of the lens with which the first side holding portion comes into contact, and the first side holding A third arm provided with a lower holding portion that comes into contact with the lower edge of the lens between an edge of the lens with which the portion abuts and an edge of the lens with which the second side holding portion abuts. A lens holding jig.

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