JPS61146456A - Globe type lens cutting machine for eyeglasses - Google Patents

Abstract

PURPOSE:To machine a frame fitting part accurately, by making a rotary head, where a base seat pinches a globe type model lens with pressure and a globe type work both are attached, rotate in the same rotation around an axis, and cutting the lens in conformity with each copying motion of a tracer rod and the globe type work. CONSTITUTION:The front side of a dummy lens 3 is positioned at the side of a base seat 1 so as to cause a pupillary center equivalent point and an angle to accord with a turning center and an angle of the base seat 1 and the lens is held in between the base seat 1 and a clamp 2. And, and angle of a globe type work is adjusted to a head 5 and locked to it. Then, a tracer rod 4 is made to come into contact with an outer edge of the lens 3 with pressure by an operating lever, making an acicular projection 11 of the base seat 1 contact with a surface of the lens 3, thus any possible slip is prevented from occurring. With rotation of a driving shaft 25, the base seat 1 and the head 5 both are rotated, making the lens 3 and the work perform copying motion to the tracer rod 4 in conformity with a contour form of the outer edge of the lens 3 as one body with a slide plate 7, whereby cutting operation takes place by a cutter 21.

Description

[Detailed description of the invention] The present invention relates to an upper mold cutting machine for eyeglasses.

When cutting eyeglass lens material into the desired contour shape to match the shape of the eyeglass frame, it is necessary to first prepare a type of master mold called a truss.

Conventionally, in order to obtain the correct shape of the glasses, the glasses frame was placed flat on a table with the m-side facing down, and the frame was held down (so that it did not move and was placed in the lens fitting groove of the glasses frame). While lightly pressing the tip of the copying rod, move the copying rod using mechanical force to copy the planar shape of the lens fitting groove of the eyeglass frame, and according to the copying movement, cut the lens-shaped work into the desired contour shape with a cutter. ◇This conventional method has the following problems.

Since the front side of the eyeglass frame is three-dimensionally curved, it is extremely difficult to fix the eyeglass frame correctly and flat, and the trajectory of the tip of the tracing rod that performs the tracing movement is difficult to accurately match the contour of the groove, making the eyeglass frame The reality is that we can only obtain a true form with an outline that approximates the shape of . Furthermore, even if the eyeglass frame is placed correctly and flat, due to the instability of the fixation of the eyeglass frame and the elastic deformability of the thin part of the eyeglass frame, the copying rod will not be able to press the unstable or thin part. As it passes downward, it tends to bulge out to the outside due to the pressure load and follow the pattern, making it almost impossible to process it into a regular shape with the correct contour. Therefore, the regular mold made by the conventional method cannot be used as a model mold for processing actual eyeglass lenses at that time, and the actual situation is that the correct shape is finished by hand.

Since the lens fitting portion of a spectacle frame is easily visible and occupies a large amount of weight in terms of design, it is usually manufactured with a dimensional error of -u or less. The inaccuracy of the correct mold obtained by the conventional method often reaches an error of 1.0 to 1.5 fi. It is said that if the lens fitting part of an eyeglass frame is deformed from its original shape, it will appear as a different shape to the naked eye. big.

Therefore, the present invention eliminates the drawbacks of the above-mentioned prior art, and provides an upper mold for eyeglasses that ensures cutting from an eyeglass ball mt-lens-shaped workpiece that correctly matches the lens fitting part of the eyeglass frame in terms of size and contour shape. The aim is to provide cutting machines.

In order to achieve the above object, the @mirror top type cutting machine of the present invention has needle-like protrusions around the periphery, and places a dummy lens of eyeglasses as a model lens with the surface in contact with the tip of the protrusion, or Place the IJ knob on a plate jig that has a hole in a predetermined location and engages the hole with the above protrusion: I
A pedestal that rotates in the direction of the periphery of the IJ '7 button, the model lens being clamped and supported between the pedestal and the pedestal by an elastic pressing means, so as to rotate together with the pedestal and the model lens. A clamp, a copying rod that contacts the outer periphery of a model lens that is supported between the pedestal and the clamp, and a circumferential shank with an axis parallel to the axis of the pedestal, which concentrically fixes the lens-shaped workpiece of the eyeglasses. A rotary head that rotates in the same direction as the pedestal, and a stationary cutter that cuts the lens-shaped workpiece on the rotary head, are connected to the center axis of the pedestal and clamp combination, and to the outer periphery of the model Lullens. contact point,
The central axis of the rotary head and the contact point of the cutter with the lens-shaped work are arranged in the same plane, and a gauge for aligning a point corresponding to the pupil center of the Yuzo lens is placed on the pedestal above the clamp. A magnifying eyepiece facing the gauge is provided, and a brake is provided at a required location to brake the pedestal while it is rotating. A movable type that can slide in the direction in which the respective central axes and contact points are lined up, or a stationary type for the pedestal and clamp combination, and a movable type that can integrally slide the copying rod and rotating head in the direction, to the movable object,
This is characterized in that a spring is coupled to bias the link so that the copying rod and the outer periphery of the model lens come into relative pressure contact.

According to the present invention, the pupil equivalent point of the eyeglass dummy lens or real lens is aligned with the center of rotation of the pedestal by appropriate means, for example, the means described later, and these lenses are placed on the pedestal as a base mochi lens; This is supported with a clamp between the pedestal and the rotating head, and the lens-shaped workpiece is fixed concentrically on the rotating head by an appropriate means, such as the means described later, and the pedestal and the rotating head are fixed. When the lens is rotated in the same direction in the direction of the axis mb, the combination of the pedestal, the lens model lens, and the clamp moves with respect to the copying rod according to the contour of the outer periphery of the lens model lens along with the lens shape °C. , or Jade-shaped Seven Dere.

The copying rod is slid in a predetermined direction with respect to the lens, that is, the copying movement is made, and the lens-shaped workpiece performs the same copying motion integrally with the rotating head, and the cutter at a fixed position performs the required cutting process on the lens-shaped workpiece. will be administered.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, (1) is a pedestal that rotates around the axis, and (2)
The eyeglass tammy lens (3) is supported between the pedestal (1) and the pedestal (1) by using an elastic pressing means (not shown) such as a spring to support the tammy lens (3) in a curved manner. and a clamp (4) that can rotate together with the dummy lens (3), which are supported with clamping pressure between the pedestal (1) and the clamp (2).
The imitation keyaki (5) that is in contact with the outer periphery of the lens (3) fixes the eyeglass lens-shaped work (6), and the pedestal (1)
It shows a rotary head that rotates in the same direction as the pedestal (1) in the direction around an axis parallel to the axis of the pedestal (1) and the clamp. (2
) and the rotary head (5) at a fixed position on the slide plate (7) that can slide in the left and right directions in FIGS. The contact point of the copying rod (4) is placed on the center line passing in the left-right direction in FIG. Attach the head (5) to the tip of the second spindle (9).

A brake (1) is provided at a required location so that the player (2) can brake the base (1) while it is rotating. The player (2) may be a friction type play shoe.

The pedestal (1) can be made of a suitable transparent material, such as a sleeve-shaped one made of acrylic resin.
) may be sleeve-shaped, including its support frame α, and the surface of the spectacle tummy lens (3) (first
Attach an appropriate number of needle-like protrusions (b), for example four, around the periphery, the tips of which are in contact with the lower surface in the figure.

Also, place the point corresponding to the center of the pupil of the eyeglass dummy lens (3) on the pedestal (
A gate (b) is formed on the lower end or upper end of the pedestal (1) to properly match the center of the clamp (2).
The 0 gauge (6) is equipped with a magnifying eyepiece '1 (2) facing the gauge @, and the 0 gauge (6) is located at 90 degrees with respect to each other as shown in FIG.
It is possible to use a plate-shaped device that displays meridians and latitudes that make up degrees. If necessary, the clamp (2) may be equipped with a push screw 0404 for pressing the periphery of the large IJ three-lens toward the pedestal (1).

The head (5) is of a suitable indigenous type, for example, a centering pin (to) that fits into the pin hole (b) at the center of the regular workpiece (6), and a lens shape (6). It is sufficient to apply an indigenous type in which a ball to be inserted into a fixed position pin hole in a workpiece (6) is provided with a shaft protruding from the tip surface for driving the rotation of the workpiece (6). In this format, the dust hole (to) of the head (5), α・(1 o'clock, the dust hole aη of the regular workpiece (6),
When Ql (Incorporated) is fitted, the regular workpiece (6) is fixed to the head (5) in a centered state and under the rotational drive coupling. From the head (5), the regular workpiece (
6) Alternatively, to remove the machined target shape, use any suitable method known per se, for example, by pulling the handle Q'J, then lowering it, and removing the regular workpiece ( 6) Alternatively, you can press the lens shape to remove it. Such release mechanisms are well known to those skilled in the art and are only schematically shown in the figures.

Furthermore, the slide plate (7) is biased to the left hesprinter in Figure 1, and the outer periphery of the spectacle lens ((3) supported between the pedestal (1) and the clamp (2)) is pressed. rod(
4) and connect the spring (1) to be brought into pressure contact with the spring (1).

(2) is a cutter known per se for cutting the lens shape of eyeglasses, which cuts the periphery of the lens shape 9-ri (6);
This will be a stationary type. The cutter (2) connects the ball on the head (5) to the machining periphery of the workpiece (6) at the center of the head (5) in Figure 2 and the combination of the pedestal (1) and clamp (2) in Figure 2. Also the cutter so that it lies in a vertical plane that encompasses the line connecting the center of the ? The cutter rotates the regular workpiece (6) by the mechanism seen in plan between the contact point of υ and the contact point of the copying rod (4) against the outer periphery of the Tammy lens (3) on the pedestal (1). It moves up and down repeatedly to cut. The cutter p may be replaced by other suitable types.

(7) is a two-position changeover between the first position (the position shown in Figure 2) and the second position (the position displaced from the first position in a direction equivalent to the counterclockwise direction in Figure 1). possible and first
At the position, the operation L/J~- is temporarily restrained by an appropriate stopper (not shown), for example, a small ball engager pressed by a spring and a stopper formed by a hole that engages with the small ball engager. When ■ is brought to the second position, the slide board (
7) is freed and placed under spring bias by the spring ring (1), and is supported by the copying rod (4) between the pedestal (1) and the clamp (2). Zu (3
) is pressed against the outer periphery of the spring (1) and displaced to the first position, the Tammy lens (3) is moved to the copying rod (
4) The slide plate (7) is brought to a position away from the position of the copying rod (4).
are placed in a fixed position such that the distance between the enclosures is equal to the distance between similar pairs of rotation centers of the base (1) and the head (5).

(2) is a lever for operating the clamp (2);
2) upwards, the clamp (2) is lifted via the working medium (not shown), and when the lever is released,
The clamp (2) is pressed down by an elastic means such as a spring.

The symbol ``Zeng'' is a stationary support stand with a copying rod (4) attached, and the symbol ``A'' is a guide plate that guides the slide of the slide plate (7). (2) is a drive shaft that is rotated by a reduction gear directly connected to the interaction C-tar; (2) is a drive shaft that rotates the rotation of the drive shaft (E) through a second spindle (8) and a second spindle (9). These drive systems and transmission systems are installed on the slide board (7).

The wire indicates an induction motor for driving the cutter (2), and the shaft drives a crank mechanism (not shown) through a transmission mechanism, which supports the crank, the shaft, and the copying rod (4). The stand (E) is moved in the left-right direction in FIG. 2 for fine adjustment, and the position of the copying rod (4) is adjusted. (2)
is a scale indicating the amount of position adjustment of the copying rod (4).

Cutting the regular shape of eyeglasses using the processing machine of the present invention having the upper configuration may be performed in the following manner.

Lift up the clamp (2) and remove the lens (3) from the eyeglass frame (not shown) on the pedestal (1) with the front side of the lens facing the pedestal (1) and the focal point equivalent to the real lens. (i.e., the point corresponding to the center of the pupil) and the angle coincides with the rotation center and angle of the pedestal (1), then release the clamp (2) and place the dummy lens (3) on the pedestal (1). ) and the clamp (2), the positioning of the lens (3) is done in an appropriate manner, e.g. when the eyeglass frame containing the 52E lens is placed on the face of the user of eyeglass lenses. Below, mark the knee lens using the point that coincides with the center of the pupil as a reference point, pass through it and represent it on the dummy lens, and mark it on the pedestal (
1) The longitudinal base line (l□) and the latitude base s<i□) on the longitudinal base 1IiI (L engineering) and the latitude base line (L2) in the upper gauge @
This can be done by aligning the pedestal (1).
The quality of the alignment specie can be checked under the transparent light of the mirror or visually through the magnifying eyepiece (2).

On the other hand, the lens-shaped workpiece (6) is fixed to the head (5) as described above. In this case, the angle of the lens-shaped workpiece (6) with respect to the head (5) is adjusted if necessary. The angle adjustment can be performed in the same manner as described for the dummy lens (3).

Then, bring the operating lever 4 to the second position and copy the copying rod (
4) Insert the dummy lens (
3) Press the outer periphery. At this time, IJ:, -lens (
3) is a pedestal (1) using an elastic pressing means such as a spring.
) and the clamp (2), the curved reservoir is grown to about one layer and is supported by clamping pressure, but the needle-like protrusion (
6) Since the tip of the lens (3) is in contact with the surface of the lens (3), this prevents the dummy lens (3) from shifting due to the above pressure. Since the lens is usually made of a plastic material such as acrylic resin, the contact of the tips of the needle-like protrusions (B) with the tips of the needle-shaped projections (B) is sufficient to prevent the dummy lens (3) from shifting forward.

The knee lens (3) is not flat, but curved like a real lens. Therefore, the pedestal (1) and the clamp (2)
Nine pieces are supported with pressure between them! - If the lens is large, when the outer periphery of the lens comes into pressure contact with the copying rod (4) under the force of a spring, a component force acts on the dummy lens in the direction of following the curvature, and the copying rod of the dummy lens Since the side (4) tends to float, it is better to press the peripheral part of the Mi-lens toward the pedestal (1) using the push screw Q4.

After setting the dummy lens (3) and lens-shaped workpiece (6), rotate the drive shaft (c) and set the first spindle (8).
) and the second spindle (9), the pedestal (1) rotates the dummy lens (3) and the head (
5) performs the same rotation integrally with the lens-shaped workpiece (6).

While the pedestal (1) is rotating, a brake is applied to the player (2).

With the above rotation, the dummy lens (3) and the lens-shaped workpiece (6) integrally move with the slide plate (7) to the copying rod (4) according to the contour of the outer periphery of the tummy lens (3) as shown in FIGS. Perform a tracing motion in the left and right direction.

Therefore, when the cutter @ is operated at an appropriate time, the lens-shaped workpiece (6) is cut according to the contour of the outer periphery of the Yuzo lens (3) under rotation accompanied by the above-mentioned tracing motion.

It goes without saying that the present invention is not limited to the embodiments described above, and that various changes can be made without departing from the gist of the present invention. For example, instead of the upper side, the pedestal (1
) and clamp (2) is a stationary type, whereas the copying rod (4) and head (5) combination is a first,
The copying rod (4) is movable to slide in the left and right direction in Figure 2, and is pressed against the outer periphery of the dummy lens (3) under the clamping support between the pedestal (1) and the clamp (2). The combination of the copying rod (4) and the head (5) may be biased by a spring so as to do so. In this case, the second spindle (9) is divided into the head (5) side, that is, the output side, and the transmission gear (b) side, that is, the input side, and the input shaft spindle and the output side spindle are separated. They may be connected using a misaligned shaft joint (not shown) such as an oltum cup link.

In this modification, if a lever similar to the lever (7) is provided, the latter lever is modified in accordance with the modification.

Modifications such as those described above will be readily apparent to those skilled in the art.

Among the users of eyeglass lenses, there are those who request that only one lens be inserted because one of the lenses of the eyeglasses they own is damaged or for other reasons, or they request that the lenses they own be replaced. In order to deal with this, in the present invention, the actual lenses of such glasses may be removed from the glasses frames and applied to the regular model lenses. )'s meridian l! (j□), placed at a position corresponding to matching on the latitude baseline (12),
A plate jig (see Fig. 7), which has a hole (2) in a part corresponding to the position of the needle-like projection and is curved like an eyeglass lens and has a smaller diameter than the above-mentioned actual lens, is inserted into the hole (to) of the needle. Place it on the pedestal by engaging the plate jig (
It is only necessary to fix the actual lens to (to). The fixation can be done by any suitable means, for example, by pasting with double-sided adhesive tape. The position and angle alignment of the actual lens used for the TamaMe dull lens with respect to the pedestal is as follows: This can be done by displaying it on a lens and aligning the longitude and latitude base lines with the holes of the plate jig. According to this actual lens, the needle-like protrusions do not damage the real lens and do not interfere with the reuse of the real lens.

If the above plate jig (■) has a hole for engaging the needle-like protrusion that passes through the front and back of the jig, it can be placed with any side of the front or back facing the pedestal. If necessary, the above-mentioned J-S can be set with the front side and the required back side facing the pedestal side.

As described above, in the present invention, a 1Mv dull lens is used as an eyeglass tummy lens or an actual lens, and the lens-shaped workpiece is rotated in the same manner, and the outer periphery of the model lens and the copying rod are brought into relative pressure contact to form a model lens. As the rotation of
The r-nibble lens slides relative to the copying rod in a copying motion that follows the contour shape of the outer periphery of the model lens, and the lens-shaped workpiece performs the same copying motion. As a result, the contour cutting of the lens-shaped workpiece is done using the model lens as a prototype, and as a result, the pupil-equivalent point of the lens-shaped model lens matches the center of rotation of the pedestal. In other words, it is guaranteed that a machining part with the same shape, in other words, a clay embankment that matches the lens fitting part of the eyeglass frame in size and shape, can be cut from the lens-shaped workpiece. Because, as is well known to those skilled in the art, [1! It is made based on the prototype for forming the lens fitting part of the mirror frame, and is sized and shaped to fit perfectly with the lens fitting part of the eyeglass frame, and the actual lens is also the same size.
This is because the shape matches the lens fitting portion of the eyeglass frame.

In this way, the fact that the present invention can obtain a clay embankment with the shape and size exactly as the lens fitting part of the eyeglass frame is a decoy! II I
I, J
This means that the lens fitting part of the spectacle frame will not be deformed when the cut lens is inserted, and the spectacle lens will also fit perfectly into the lens fitting part of the spectacle frame.

Lenses have a focal point, and when cutting the lens, it is necessary to match this focal point to the pupil distance of each individual.
In this regard, in the present invention, the position and height of the pupil are checked while the eyeglass frame containing lenses or real lenses is placed on the face, and the focal point of the lens or real lens is marked. , can be focused accurately and is purposeful. This also improves medical results.In addition, in the present invention, the brake is applied to the pedestal while it is rotating, so that the model lens has a part of its outer periphery with a triangular hypotenuse. Even if the lens has an inclined shape, it is guaranteed that the accurate shape of the lens shape will be cut by applying a typical transmission gear to the transmission means of rounding the base, but there is no backlash. Therefore, in the case of a model lens with such a shape, if no brake is applied to the pedestal while it is rotating, the slanted outer edge of the model lens should be placed under the same rotation as the pedestal. When rotating, the model lens is pushed at the inclined outer peripheral edge part by the contact pressure of the copying bar against the part or the part against the copying bar due to the splinter bias, and the model lens is pushed in the direction of rotation by the amount of the puff crush. , a pair of transmission gears may shift relative to the driving gear, and when such a shift occurs, the ball Wiry will faithfully follow the contour of the model lens and rotate in the same exact manner as the pedestal. However, if the pedestal is braked while it is rotating, this problem can be solved.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the present invention, 2nd WJ is a plan view thereof, Fig. 3 is a partially omitted side view, Fig. 4 is a plan view of a gauge in the same embodiment, and Fig. 5 is a dummy. FIG. 6 is a plan view showing an example of a lens, FIG. 6 is a plan view of a regular workpiece, and FIG. 7 is a plan view of a single press. (1) is the pedestal (2) is the clamp (3) is Tamire: J's (4) is the copying rod (5) is the rotating head (6) is the regular workpiece (7) is the slide plate (8), (9) The spindle (b) is the needle-shaped protrusion (2), the gauge (to) is the magnifying eyepiece a→, the push screw is the cutter (to), the brake is (to), the hole (to) is the plate screw (and above) )

Claims (1)

[Claims] (1) A plate jig that has a needle-like protrusion around its periphery, and a dummy lens for glasses is placed as a model lens with the surface in contact with the tip of the protrusion, or a plate jig that has a hole at a predetermined part and the hole is engaged with the protrusion. A real lens is fixed thereon to form a model lens, a pedestal rotates in a circumferential direction of an axis, and the model lens is supported by an elastic pressing means between the pedestal and the pedestal and the model lens. Clamps that can rotate together,
These are a copying rod that contacts the outer periphery of a model lens supported between the pedestal and the clamp, and a lens-shaped workpiece of eyeglasses that is fixed concentrically and moved in a direction around an axis parallel to the axis of the pedestal. A rotating head that rotates in the same manner as the pedestal, and a stationary cutter that cuts the lens-shaped workpiece on the rotating head, are connected to the center axis of the pedestal and clamp combination, the contact point of the copying rod to the outer periphery of the model lens, and the rotating head. The central axis of the head and the point of contact of the cutter with the lens-shaped work are arranged in the same plane, and a gauge is placed on the pedestal to align the point corresponding to the pupil center of the dummy lens, and a gauge is placed on the clamp. A magnifying eyepiece facing the pedestal is provided at a required location, and a brake is provided at a required location to brake the pedestal while it is rotating. A movable type that can slide in the direction in which the central axis and the contact points are lined up, or a stationary type with the pedestal and clamp combination and a movable type that can integrally slide the copying rod and rotating head in the direction, so that the movable type is substantially movable. 1. A lens shape cutting machine for eyeglasses, characterized in that a spring is coupled to a mold for urging the copying rod and the outer periphery of the model lens so that the outer periphery of the model lens is brought into relative pressure contact with the mold.