JPH07237194A - Square hole drilling machine for plastic lens and square hole drilling method using it - Google Patents

Abstract

PURPOSE:To efficiently drill a square hole by arranging a drilling tool having an edge part where respective triangular surfaces of a tapering pyramid part are formed as a file-shaped edge surface so as to be able to advance to and retreat from a lens holding stand in the axial direction of the pyramid part. CONSTITUTION:A square hole drilling machine 1 vertically moves along a column 3 vertically erected on a base 2 by vertical rotational operation of a handle 5. A drilling tool 9 is held by a holder part 7, and a head 6 is arranged. A lens holding stand 10 is longitudinally slidably arranged along rails 23 arranged in the longitudinal direction on both sides of an upper surface part of the base 2. In the drilling tool 9, an edge part 13 is continuously arranged on the lower end of a square pole part 12 forming a cross-sectional square shape arranged on the lower end of a cylindrical shaft 11, and in this edge part 13, a file-shape edge surfaces 18 are formed of respective triangular surfaces 17 of a tapering pyramid part 16 forming a cross-sectional square shape. In the file-shaped edge surfaces 18, an edge 20 having a downward stepped surface being a cutting part is formed in a vertical multistage shape, and a square hole is drilled by vertical operation of the head 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple square hole punching machine for punching a plastic lens with a square hole used for connecting a connecting portion of a temple or a bridge member to a lens, and a corner using the square hole punching machine. The present invention relates to a hole punching method.

[0002]

2. Description of the Related Art A conventional connecting structure for connecting a connecting portion of a temple or a bridge member to a plastic lens uses a connecting screw for inserting a circular hole provided in the lens to connect the connecting portion. Since it is connected to the lens, it is necessary to attach a contact piece that contacts the lens peripheral surface to the connecting portion in order to prevent the connecting portion from rotating. In view of this, the present inventor has proposed in Japanese Patent Application No. 5-349976 a connecting structure that can achieve rotation prevention of the connecting portion only by screwing the connecting portion to the lens.

An example of the connecting structure will be described with reference to FIGS. 14 to 15 by taking the case of connecting temple connecting parts as an example. In the square hole b provided at the connecting part of the lens a, a resin rectangular cylinder c is formed. Is closely inserted to form the square connecting hole d, and the square connecting hole f is provided in the connecting portion e of the temple by aligning with the square connecting hole d. Then, the angular shaft portion g of the connecting screw j, which is formed by bulging the head h at one end of the angular shaft portion g and projecting the screw shaft i at the other end, is provided from the one surface side of the lens with the square through hole f. And a rectangular connecting hole d, and a nut m is screwed and tightened by interposing a washer k on a screw shaft i protruding to the other surface side of the lens to fix the connecting portion e to the lens a. there were. In the case of the connection structure, since the square shaft part g is closely inserted into the square connection hole d and the connection screw j is integrated with the lens a, the connection is in the engagement state with the square shaft part g of the connection screw. The part e is connected to the lens a while being prevented from rotating.

By the way, such a connecting structure is constructed at the time of selling spectacles at a spectacle retail store, and for that purpose, a punching machine for punching a square hole in a lens is required.
Such square holes can be drilled using an end mill, but this requires an expensive flife board. However, it was totally uneconomical for an eyeglass retailer to introduce it just to punch a square hole in the lens.

An object of the present invention is to provide a simple square hole punching machine suitable for the purpose of punching a square hole in a lens. Another object of the present invention is to provide a method for punching a square hole that efficiently punches a square hole using the square hole punching machine.

[0006]

In order to solve the above problems, the present invention employs the following means. That is, the square hole punching machine according to the present invention includes a punching tool having blade portions formed by forming each triangular surface of a tapered pyramid portion into a file-like blade surface, in the axial direction of the pyramid portion, a lens holder. It is characterized by being able to move forward and backward.

A preferred embodiment of the square hole punching machine according to the present invention is a punching tool having a blade portion in which each triangular surface of a tapered pyramid portion is formed into a file-like blade surface, in the axial direction of the pyramid portion. Up and down so that it can be raised and lowered toward the lens holder,
The file-like blade surface is characterized in that a cutting blade having a stepped surface serving as a cutting portion facing downward is formed in a multi-tiered manner.

In the square hole punching machine, the file-like blade surface of the blade portion is preferably constructed as follows. That is, a cutting edge having a step surface (cutting portion) that crosses the triangular surface of the pyramid inclining with respect to the base end side is formed by arranging the cutting edges in multiple stages, or the triangular surface of the pyramid part is formed on the base end side. With respect to the cutting edge having a first step surface (cutting portion) that is inclined in one direction with respect to the other and a cutting edge having a second step surface (cutting portion) that is inclined in the opposite direction and crosses the triangular surface. It is preferable that the blade and the blade are arranged in a multi-tiered manner in an upper and lower state in an intersecting state.

In the above-described square hole punching machine, the punching tool is provided with a base of the pyramid portion and a prismatic portion having the same number of angles as that of the prismatic portion, the side surfaces of which are connected to the triangular surface of the pyramid portion in series. It is preferable that each side surface is formed as a file-shaped blade surface for finishing the hole wall surface of the square hole punched by the blade portion to be smooth. It should be noted that the file-shaped blade surface does not have to cover the entire side surface as long as the wall surface of the square hole can be finished to a smooth surface to some extent. Further, it is preferable that a heater for heating the blade portion to a required temperature is additionally provided in the square hole punching machine.

In the square hole punching machine, the lens holding base has a spherical holding concave surface that substantially matches the projecting surface of the plastic lens, and an insertion hole for inserting the blade portion is provided at the center thereof. Also, it is preferable that a plurality of mark lines are provided in parallel on the holding concave surface at a required interval. Further, it is preferable that the lens holder is provided with a clamp tool for fixing the plastic lens whose lens protruding surface is in contact with the holding concave surface in this state. In addition, the lens holder is movable in the plane orthogonal to the axis of the pyramid so that the holding concave surface is offset to the side of the blade and the blade can be inserted into the insertion hole. It is preferable that the lens holder is fixed in a state where the lens holder can be inserted into the insertion hole.

The method of punching a square hole according to the present invention has a spherical holding concave surface that substantially matches the projecting surface of a plastic lens, and an insertion hole for inserting a blade portion is provided at the center thereof. As the holding concave surface, a square hole punching machine having a lens holding base in which a plurality of mark lines are provided in parallel at required intervals is used. First of all, a plastic lens with a pilot hole
The horizontal meridian provided on the lens surface is made parallel to the mark line of the holding concave surface, and the lower hole is aligned with the insertion hole of the holding concave surface so that the lens projecting surface abuts the holding concave surface. Fix the lens to the lens holder. After that, the blade portion is gradually advanced, the hole wall of the pilot hole is cut by the file-like blade surface, the pilot hole is gradually expanded, and this is finished into a square hole. It is preferable to heat the perforation tool to a required temperature with a heater during the perforation.

[0012]

According to the present invention, when the blade is introduced into the pilot hole and the punching tool is gradually advanced, the file-shaped blade surface of the blade cuts the hole wall of the pilot hole. This cutting is performed by the cutting portion (step surface) scraping the hole wall of the pilot hole as the punching tool advances. When the cutting portion (step surface) is provided so as to diagonally cross the triangular surface of the pyramid portion, cutting resistance is relatively small, and chips easily escape along the cutting portion (step surface). Cutting proceeds smoothly. In particular, when a file-like blade surface for finishing is formed on each side surface of the prismatic portion provided in series at the base end of the pyramid, the prismatic portion is inserted into the square hole formed by the blade portion, The hole wall surface of the hole is finished more smoothly by the file-shaped blade surface. When the blade is heated to the required temperature by the heater to make holes, the hole wall is heated by the blade, so even if the cutting speed is increased to some extent, the lens is not overloaded and smooth cutting is possible. Become.

When a plurality of mark lines are provided on the holding concave surface in parallel at a required interval, the plastic lens is set on the holding concave surface with its horizontal meridian parallel to the mark line of the holding concave surface. , Square holes can be drilled in a desired direction with respect to the horizontal line.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a square hole punching machine according to the present invention. The square hole punching machine 1 is provided with a head 6 which is vertically moved by a vertical turning operation of a handle 5 on a column 3 standing upright on a base 2, and a punching tool 9 is held in a holder portion 7 of the head. In addition, the lens holder 10 is provided on the base 2 so as to be slidable back and forth.

As shown in FIG. 2, the punching tool 9 comprises a series of blade portions 13 provided at the lower end of a prismatic portion 12 having a square cross section provided at the lower end of a cylindrical shaft 11. The blade 13 has a tapered pyramid 16 having a square cross section with a rounded corner 15.
The triangular surfaces 17, 17, 17, 17 are formed on the file-shaped blade surface 18.

As shown in FIGS. 2 and 4, the file-shaped blade surface 18 is a base end side of the triangular surface 17 (in the present embodiment,
The axis of the punch is horizontal because it is oriented vertically) 1
9, a cutting edge 20 provided with a first cutting portion (step surface) 21a that crosses the triangular surface 17 at an angle of about 45 degrees, and a second cutting edge 20 that crosses the triangular surface 17 by tilting in the opposite direction. The cutting edge 20 provided with the cutting portion (step surface) 21b is formed by arranging the cutting edge 20 in upper and lower stages in an intersecting state.
As shown in FIG. 3, has a stepped surface 21 serving as a cutting portion facing downward.

FIG. 5 shows another example of the file-shaped blade surface 18, which is provided with a cutting portion (step surface) 21 that crosses the triangular surface 17 at an inclination of about 45 degrees with respect to the base end side 19. The cutting blades 20 are arranged in upper and lower stages. In addition, in FIGS. 4-5, the space | interval between cutting blades is represented large for convenience of explanation. Also, the angle of inclination of the file-shaped blade surface is about 45 as described above.
It is preferable in terms of cutting to set the degree.

The punching tool 9 can be moved up and down as the head 6 moves up and down, with its cylindrical shaft 11 being chucked by the holder portion 7 with the triangular surfaces of the pyramid portion facing the front, rear, left and right sides. A heater (not shown) is incorporated in the holder portion 7, and the blade portion 13 is heated to a required temperature by the heater.

As shown in FIGS. 1 and 6, the lens holder 10 can be moved back and forth by being guided by rails 23, 23 provided on both sides of the upper surface of the base 2 in the front-rear direction. As shown in FIGS. 7 to 8, the upper surface portion thereof has a spherical holding concave surface 26 that substantially matches the lens projecting surface 25, and the central portion thereof is
An insertion hole 27 for inserting the blade 13 that moves up and down is provided. The holding concave surface 26 is provided with a plurality of mark lines 29 extending in the left-right direction in parallel at required intervals.

A lens projection surface 25 is provided around the holding concave surface.
The plastic lens 3 in a state of being in contact with the holding concave surface 26.
As shown in FIG. 6, a pair of clamp members 31, 31 for pressing 0 are attached at an angle of about 90 degrees. As shown in FIGS. 6 and 8, the clamp 31 has a rod shape that is long in the radial direction of the holding concave surface, and an elongated hole 32 that is long in the lengthwise direction is provided in an upper and lower open state at an intermediate portion thereof. There is.
The outer end of the lower surface is a fulcrum portion 33, and the inner end is a lens pressing portion 35. Then, the screw shaft 37 of the fixing bolt 36, which is inserted through the elongated hole 32, is screwed into the screw hole 39 provided around the holding concave surface 26, and the fixing bolt 36 is tightened. As shown in FIG. The portion 35 presses the concave portion 40 of the lens.

Further, in the lens holding base 10, the holding concave surface 26 is moved to the side of the blade portion 13 in the front position (state shown by reference symbol A in FIGS. 1 and 6), and the blade portion 13 is inserted into the insertion hole 27. It can be guided and moved by the rails 23, 23 so as to take a possible rear position (state shown by reference character B in FIGS. 1 and 6), and is fixed to the base 2 at the rear position B.

Therefore, in order to punch a square hole in the lens 30 using the square hole punching machine 1, first, as shown in FIG.
A circular pilot hole 42 is bored in the connecting portion of the lens 30. The diameter of the pilot hole 42 is slightly smaller than the length of one side of the square-shaped square hole to be formed.

In the lens 30 having the prepared hole 42,
A horizontal meridian 43 that is horizontal when it is incorporated in the eyeglasses is provided in advance by attaching a tape having a straight line. As shown in FIGS. 6 and 9, such a lens 30 has its horizontal meridian 43 parallel to the mark line 29 of the holding concave surface 26 and the pilot hole 42 is aligned with the insertion hole 27 of the lens holding base 10. Then, the lens projecting surface 25
Are brought into contact with the holding concave surface 26. The lens pressing portion 35 of the clamp 31 is placed on the concave surface 40 of the lens 30 in this contact state, the fixing bolt 36 is tightened, and the lens 30 is held by the clamp tools 31 and 31.
Fix at 6. This lens is set by setting the lens holder 10 at the front position A, and after setting the lens, the lens holder 10 is fixed at the rear position B. In this state, the blade portion 13 can be inserted into the insertion hole 27.

After that, the handle 5 is rotated downward to gradually lower the blade portion 13 (FIG. 10), and as shown in FIG. 11, the blade portion 13 is introduced into the prepared hole 42 and further lowered. Then, the file surface 18 of the pyramid part gradually cuts the hole wall 45 of the pilot hole 42. This cutting is accompanied by the advancement of the punch,
The cutting portion (step surface) 21 is performed by cutting the hole wall 45 of the pilot hole (FIG. 3). Since the cutting portion (step surface) 21 is provided so as to diagonally cross the triangular surface of the pyramid portion, the resistance during cutting is relatively small, and the chips are along the cutting portion (step surface) 21. Easy to escape. For this reason, cutting progresses in a natural state, and the prepared hole 42 gradually expands. Figure 1
As shown in FIG. 2, when the passage of the blade portion 13 is completed, a square hole 47 having a corner portion 46 formed in an arc surface is formed as shown in FIG. Especially, the blade part 1 by the heater
When the hole 3 is heated to the required temperature for boring, the hole wall 45 is heated by the blade portion 13, and therefore the lens is less burdened even if the cutting speed is increased to some extent. The upper and lower surfaces 48a and 48b of the square hole 47 formed in this manner are shown in FIG.
It exhibits a horizontal plane as shown in FIG.

In the square hole punching machine according to the present invention, as shown in FIG. 2, it is preferable to form a file-like blade surface 50 for finishing on each side surface 49 of the prismatic portion 12. The file-like blade surface is provided on the entire side surface 49 in FIG. 2, but it is not provided on the entire side surface as long as the hole wall surface of the square hole can be finished to a smooth surface to some extent. Good. As shown in FIGS. 2 and 4, the finishing file edge surface 50 is inclined in one direction with respect to the base end side 19 (for example, is inclined at an angle of about 45 degrees with respect to the base end side 19). Cutting edge 5
1a and a cutting blade 51b inclined in the opposite direction are provided in an upper and lower multistage in an intersecting state. Alternatively, as shown in FIG. 5, vertically and vertically multiple stages are formed so as to be inclined in one direction with respect to the base end side 19 of the triangular surface (for example, with an inclination of about 45 degrees with respect to the base end side 19) and across the side surface 49. To be installed. Cutting edge 5
1, the cutting edge 51a and the cutting edge 51b have the same configuration as the file-shaped blade surface 18 of the blade portion, and as shown in FIG. When the file-like blade surface 50 for finishing is provided in this way, as shown in FIG.
By inserting the prism portion 12 into the square hole 47 formed by the cutting blade, the hole wall surface of the square hole is finished more smoothly.

[0026]

The present invention has the following excellent effects. INDUSTRIAL APPLICABILITY The square hole punching machine according to the present invention has a simple structure in which a punching tool having a file-like blade surface can be moved back and forth toward the lens holding table, and thus can be provided at a relatively low cost.

In the case of the square hole punching machine according to the present invention, the required square hole can be easily formed by gradually moving the blade portion introduced into the lower hole provided in the lens to cut the hole wall with the file-like blade surface. In addition, it is possible to surely perforate.

Particularly, when the cutting portion (step surface) of the cutting edge is provided so as to cross the triangular surface of the pyramid portion with an inclination with respect to the base end side, the cutting resistance is relatively small, and the cutting dust is present in the cutting portion. Since it is easy to escape along the (step surface), smoothing of cutting is achieved, which is preferable. Also, when the blade is heated to the required temperature with a heater and punched, the wall of the hole is heated by the blade, so even if the cutting speed is increased to some extent, the lens is not burdened and efficient cutting is possible. It will be possible. Further, when each side surface of the prismatic portion provided in series at the base end of the pyramid portion is formed into a file-shaped blade surface, the prismatic portion is inserted into the square hole formed by the blade portion, thereby It is preferable that the wall surface is finished more smoothly by the file blade.

By providing the lens holding table with a spherical holding concave surface, the lens can be held stably. Furthermore, the lens holding base can be moved in a plane orthogonal to the axis of the pyramid so that the holding concave surface is displaced laterally of the blade and the blade can be inserted into the insertion hole. It is preferable that the lens holding base is fixed in a state in which the punching tool can be inserted into the insertion hole because the lens can be easily attached to and detached from the holding concave surface.

When a plurality of mark lines are provided on the holding concave surface in parallel at required intervals, the lens is set to the horizontal line by setting the horizontal meridian parallel to the mark line of the holding concave surface and setting it on the holding concave surface. On the other hand, the square hole can be accurately and easily drilled in the required direction.

[Brief description of drawings]

FIG. 1 is a side view illustrating a square hole punching machine.

FIG. 2 is a perspective view illustrating a punching tool and a sectional view of a blade portion thereof.

FIG. 3 is a cross-sectional view illustrating a file-shaped blade surface of a blade portion.

FIG. 4 is an explanatory diagram illustrating an example of a file-shaped blade surface.

FIG. 5 is an explanatory diagram illustrating another example of a file-shaped blade surface.

FIG. 6 is an explanatory diagram illustrating a state in which a lens is set on the lens holding base together with a lateral movement operation of the lens holding base.

FIG. 7 is a perspective view illustrating a lens holder.

FIG. 8 is a cross-sectional view showing a state where a lens is set on a lens holder.

FIG. 9 is a front view showing a lens provided with a pilot hole.

FIG. 10 is an explanatory diagram showing a state immediately before punching a square hole in a lens set on a lens holder.

FIG. 11 is an explanatory diagram illustrating a state in the middle of punching a square hole.

FIG. 12 is an explanatory diagram illustrating a state in which punching of square holes is completed.

FIG. 13 is a partial front view showing a lens provided with square holes.

FIG. 14 is an exploded perspective view illustrating a temple connecting structure using a square hole formed in a lens.

FIG. 15 is a sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Square hole punching machine 9 Punching tool 10 Lens holding stand 13 Blade part 16 Pyramid part 17 Triangular surface 18 Rasp blade surface 19 Triangular base end side 20 Cutting edge 21 Step surface 25 Lens projecting surface 27 Insert hole 29 Mark line 30 Lens 31 Clamp 42 Pre-hole 43 Horizontal meridian 45 Hole wall 47 Square hole

Claims (11)

[Claims] 1. A punching tool having a blade formed by forming each triangular surface of a tapering pyramid into a file-like blade surface is made capable of advancing and retracting toward a lens holder in the axial direction of the pyramid. A square hole punching machine for plastic lenses, which is characterized in that 2. A punching tool having a blade formed by forming each triangular surface of a pyramid portion to be tapered into a file-shaped blade surface, with the axial direction of the pyramid portion facing up and down and facing the lens holder. A square hole punching machine for a plastic lens, which is capable of moving up and down, and wherein the file-like blade surface has cutting blades having a stepped surface serving as a cutting portion facing downward and formed in a multi-tiered manner. 3. A step surface serving as a cutting portion is extended so as to cross a triangular surface of a pyramidal portion with an inclination with respect to a base end side of the triangular surface, and a cutting edge having the step surface is vertically multi-tiered. The square hole punching machine for a plastic lens according to claim 2, wherein the sharpened blade surface is formed. 4. A first step surface that traverses the triangular surface of the pyramid portion in one direction with respect to the base end side of the triangular surface, and a second step surface that traverses the triangular surface in the opposite direction. 3. The square hole punching machine for a plastic lens according to claim 2, wherein the step surface and the stepped surface are formed in a vertical multi-step manner to form a file-like blade surface. 5. The punching tool comprises a pyramidal portion, a base end of which is provided with a prism portion having the same number of angles as the pyramid portion, and a side surface of which is connected to a triangular surface of the pyramid portion. The square hole punching machine for a plastic lens according to claim 1, 2, 3 or 4, wherein the square wall hole of the square hole punched by the blade portion is formed into a file-like blade surface for finishing the surface smoothly. 6. The square hole punching machine for a plastic lens according to claim 1, further comprising a heater for heating the blade portion to a required temperature. 7. The lens holding base has a spherical holding concave surface that substantially matches the projecting surface of the plastic lens, an insertion hole for inserting the blade portion is provided at the center thereof, and the holding concave surface is formed. A plurality of mark lines are provided in parallel at required intervals, and the square hole punching machine for a plastic lens according to claim 1, 2, 3, 4, 5 or 6. 8. The lens holding base is provided with a clamp tool for fixing the plastic lens whose lens projection surface is in contact with the holding concave surface to this contact state. Square hole punching machine for plastic lenses. 9. The lens holding base has a position in which a holding concave surface is deviated to the side of the blade portion in a plane orthogonal to the axis of the pyramid portion,
The blade can be moved so that it can be inserted into the insertion hole.
The square hole punching machine for a plastic lens according to claim 7, wherein the lens holding base is fixed in a state where the blade portion can be inserted into the insertion hole. 10. The square hole punching machine according to claim 7, wherein a plastic lens having a prepared hole is formed such that the horizontal meridian provided on the lens surface is parallel to the mark line of the holding concave surface. Align the lens with the insertion hole of the holding concave surface, bring the lens protruding surface into contact with the holding concave surface, fix the plastic lens to the lens holding table in the corresponding contact state, and then gradually advance the blade part A method of punching a square hole, characterized in that the hole wall of the pilot hole is cut with a blade-like blade surface to gradually expand the pilot hole to finish the square hole. 11. The method for punching square holes according to claim 10, wherein the blade portion is heated to a required temperature by a heater during punching.