JPS6336220A - Lens coloring device - Google Patents

Abstract

PURPOSE:To form coloring density gradient on the surface of a lens by rotating a motor forward/backward and applying prescribed motion based upon composite motion consisting of the winding and rewinding of a reel transmission system and the eccentric rotation of the reel to a lens holder coupled with the other end of a string through the transmission system. CONSTITUTION:When the reel winds and rewinds the string 4 by rotating the motor forward/backward, the lens holder coupled with the other end of the string 4 is vertically moved with a small amplitude and a small period and one period for forward/ backward rotation coincides with one cycle of vertical movement. The difference of motion between forward and backward rotation becomes the rotational movement variable of the reel 3 on a disk 1, the general rotating direction of the reel 3 is determined by changing the ratio of forward and backward rotational periods and the reel 3 is reciprocated in a fixed section of the disk 2, so that one period of the reciprocation becomes one cycle for the vertical movement of the lens holder and continuous movement becomes the vertical movement of a large period. In said constitution, composite motion consisting of the vertical movement with a small amplitude and a small period and the vertical movement with a large period is applied to the lens holder, a dipping time and a dripping position in a dyeing bath are controlled to continuously apply dyeing density gradient to the surface of the lens.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) This invention relates to a lens dyeing device, and more specifically, a dyeing device for eyeglass lenses for imparting a dyeing concentration gradient (ma1) on the surface of eyeglass lenses. It is related to the dyeing equipment N.

(Conventional technology) In recent years, plastic lenses have become popular due to their excellent dyeability.
It is possible to create a curved lens with rich color changes, and a graph with a continuous change in dye density gradient. ``Illi f
has ffi. Dyeing of plastic lenses is carried out at eyeglass stores and manufacturing plants, and there is a dyeing bath, a machine for adjusting the temperature of the dyeing bath, and a machine for maintaining and dipping the lenses in the dyeing bath. A staining apparatus with two sides on the right side is used.

The principle of the shading dyeing method is to impart a continuous dyeing concentration gradient to the lens surface by changing the immersion time and immersion position of the shading portion of the lens surface in the dye bath, which is set arbitrarily.Specifically, During dyeing, the lower end of the lens moves in a dyeing bath in a compound motion consisting of small-amplitude, small-period vertical vibrations and large-period vertical vibrations, so that it draws a movement trajectory as shown in Figure 9. For example, Tokko Sho 56-1
As shown in Publication No. 0105, a belt stretched through a plurality of pulleys and a rotating rod for suppressing the belt linked to an electric motor are used to provide means for imparting small-amplitude, small-period vertical vibration, and a rotating rod for vertical movement generates large vibrations. BACKGROUND OF THE INVENTION A shading dyeing apparatus having a periodic vertical movement imparting means is known.

Furthermore, Japanese Patent Publication No. 57-55604 discloses that a cam member that is linked to an electric motor and has irregularities formed on its peripheral part, a movable arm that works with the cam member, and a spring member that is connected to a lens holder are used to provide small-amplitude, small-cycle A blur staining device that provides up-and-down movement and large-period up-and-down movement is disclosed.

(Problem to be solved) The relationship between the dyeing concentration and immersion time of plastic lenses is
As shown in FIG. 10, at the initial stage of dipping, the dyeing speed is fast, but as the dipping time increases, the dyeing speed slows down and is fixed at a constant density.

Therefore, a good blur-dyed lens, l! In order to keep the staining gradient constant, in the boundary area of the blurring section on the lens surface, the movement of the lens during the immersion operation is such that the lower end of the lens is initially immersed in the staining solution at a slow speed, and then gradually When the lower end of the lens reaches its lowest immersion position, the pulling starts, and the pulling speed is initially fast;
It is preferable to change the speed so that the culm becomes slow. However, a common drawback of these conventional mechanisms for providing small-amplitude, small-period vertical vibration width is that eccentric crank motion or rotational motion by a spring is converted into linear motion, so the period of lens immersion motion is As shown in the figure, a sine curve is drawn, so that the lens pulling speed becomes O at the lowest or highest amplitude point, and the lens pulling speed becomes O at an intermediate position between the lowest and highest points. It is to be the maximum.

That is, the immersion speed at the lowermost portion and the uppermost portion of the lens is slow, there is little change in the immersion time of the lens, and it is difficult to provide a continuous concentration difference.

Furthermore, as a material characteristic of the plastic lens itself, it is hydrophobic, and in addition, the temperature of the dyeing bath is approximately 70°C to 90°C.
The immersed part of the lens is under the same temperature as the lens, but the non-immersed part is exposed to the air, so there is a temperature difference between the immersed part and the non-immersed part. This creates a boundary line between the immersed and non-immersed parts of the lens, making it difficult to maintain a continuous concentration gradient. The present invention has been made to solve this problem, and an object of the present invention is to provide a 1.
Another object of the present invention is to provide a dyeing device for a blurred lens that imparts a continuous density gradient to the lens.

(Means for Solving the Problems) According to the present invention, a bokashi dyeing device immerses a lens in a dyeing bath containing a dyeing solution, and applies a continuous dyeing concentration gradient to the lens. In the operating mechanism,
a reel rotational movement means that uses an electric motor as a driving means, is eccentrically fixed to a rotational movement shaft of the electric motor, and performs eccentric rotational movement;
a transmission means having one end connected to a lens holder for holding a dyed lens and a transmission thread connected to the reel; a detection means for detecting the eccentric movement of the reel and the rotational position of the wet lowering position; The rotation of the electric motor is switched between forward rotation and reverse rotation, and the rotation ratio of the forward rotation and reverse rotation is not the same, and the duty ratio of the forward rotation and reverse rotation of the electric motor is changed in synchronization with the detection signal of the detection means. and a control means comprising a control circuit for reversing the normal rotation and reverse rotation of the electric motor for wet descent and return to rotational motion, and the reel is controlled by switching the rotation of the electric motor between forward rotation and reverse rotation. The lens holder, which is connected to the other end through the transmission thread, undergoes a wet downward movement, a small amplitude, small period up and down movement, and a large period. It is characterized by avoiding vertical movement.

(Function) Transmission is performed by winding and unwinding the transmission rope of the reel linked to the motor's rotating shaft due to the motor's forward/reverse rotation switching and the difference in rotation ratio, and the eccentric rotational movement of the reel relative to the motor's rotating shaft. [1-The lens holder connected to the other end of the pen is given a small amplitude, small period vertical movement and a large period vertical movement, so the lower end of the lens enters the dyeing bath slowly at the beginning. The lens enters at a certain speed, gradually increases in speed, and when the lens reaches the lowest position, pulling starts, and the pulling speed can be changed such that it is initially fast and then becomes slower.

In addition, by moistening and lowering the lens into a dyeing bath and wetting the surface of the non-dyed part of the lens, it improves the wettability of the hydrophobic lens surface, improves thermal conductivity, and makes the non-dyed part of the lens wet. The boundary between the dyed area and the dyed area can be made inconspicuous, and a continuous 8 degree gradient can be created.

(Example) Hereinafter, the present invention will be explained in detail with reference to the examples shown in FIGS. 1 to 8.

FIG. 1 is a front view of an example of the Rubokashi dyeing apparatus according to the present invention, FIG. 2 is a side view of the same apparatus in a moving state, and FIG.
The figure is a characteristic diagram showing the driving state, Figure 3 is a partially enlarged view showing the arrangement of the photodetecting element in the detection section, Figure 7 is a curve showing the movement locus of the lens surface, and Figure 4 is a curve showing the movement locus of the lens surface. FIG. 2 is a circuit diagram for controlling a reversible synchronous electric motor.

Fig. 5 shows the ratios of deni r, -j, and a of control circuit C. The center of the disk 1, which is a ridge for arranging the means (described later), is the reversible synchronous motor 2.
(J in FIG. 2), and a thread reel 3 is fixed eccentrically from the rotation axis of the electric motor 2 to the disc 11-. One end of the transmission line 4 is connected and fixed to the circumferential reel groove 3a (shown in FIG. 2) of the bobbin reel 3, and its fixed position iN3'o is the maximum eccentric point of the bobbin reel 3, that is, the bobbin reel 3 It is located in a portion of the circumferential reel groove 3a that intersects with a straight line passing from the rotational center point 3c to the geometrical center point 3d of the thread reel 3. A shielding plate 5 for roughly shielding a photodetector element (to be described later) inside the disk 1 has one end fixed to the rotation center of the electric motor 2 (shown in FIG. 2) and rotates as the disk 1 rotates. The other interlocking free end 5a (shown in FIG. 2) is bent at a substantially right angle toward the substrate 16 of the device at a portion that substantially coincides with the outer peripheral edge of the disk 1. Therefore, the shielding plate can detect the rotational position of the disc, that is, the reel, in correspondence with a photodetection element (photointerrupter) to be described later. In addition, the lift pulley 6 connects one end of the connecting plate 7 with the disc 1.
is rotatably supported between parts near the outer peripheral edge of the
The other end of the connecting plate 7 is screwed to the thread reel 3 at the center of rotation 3C of the disc 1. Therefore, it is linked to the rotation of the bobbin reel, and its mounting position is the shielding plate 5.
It is placed at a position separated by an angle of approximately 106 degrees clockwise from the Next, the transmission thread 4 that transmits the rotational motion of the thread reel is transmitted from the thread reel 3 through the lift pulley 6 and fixed pulleys 8, 9, 10, 11, 12 and 13 to the other end [
, 1, connected to lens ij<ruda 14.

Pulley 9 slides its spindle fully M +fl! L
.

It can be slid in the left and right direction (direction a), and the immersion position of the lens can be adjusted so that the length of the transmission thread 4 can be adjusted.

Further, the panel 15 is provided with a start switch 15a, a power display switch 15b, a power display IED 15C, a timer switch 15d for setting the dyeing time, and a humidity counter 15e for performing the moistening operation.

FIG. 2 is an internal side view of the device with the shielding plate 5 in the lowest azimuth circle.
Transformer 17, semiconductor relay element 18, heat sink 1
9. Electric IJJ machine 2 is installed.

The relay element 18 is an element for forward and reverse rotation of the electric motor 2, and converts one 5V three-way power signal into a 100V system electric motor drive power signal.

The transformer 17 converts the power supply (DC 5V) (not shown) for the logic circuit of the circuit board 16 into a commercial power supply (AC 100V).
50/60Hz), converts the voltage from AC 100V to AC 8V and supplies it to the motor control circuit C (Figure 6), which rectifies and smoothes the AC 8V. Convert it to a stabilized 5V DC power supply.

The heat sink 19 is a heat dissipation plate for a three-terminal regulator (not shown) that constitutes the circuit board 16, and is used to efficiently dissipate heat generated inside the element to the outside to prevent the element from being destroyed by heat. It is.

FIG. 3 is a diagram showing the arrangement of the detection elements arranged on the substrate 15, in which the free end 5a of the shielding plate 5 shown in FIG. As shown in the figure, an origin photointerrupter 201 (hereinafter referred to as origin SW), a photointerrupter 21 (hereinafter referred to as upper limit SW) for detecting the start position and upper limit position of large-period vertical movement, and a photointerrupter 22 for detecting the lower limit position of large-period vertical movement (hereinafter referred to as upper limit SW), interrupter 22a (
A wet switch (hereinafter referred to as a wet SW) is provided. The origin 5W20 is located vertically above the horizontal line, and then C
The upper limit is 5W2 at the angular position offset by about 137 degrees in the CW direction.
1, there is an angular direction 4Ct roughly deviated by about 112 degrees toward the CCW direction, a lower limit 5W22 at "R", and a wet 5W22a at an angular direction position deviated by about 81 degrees from the CCW direction.

Therefore, since the shielding plate 5 is interlocked with the disk 1, it rotates counterclockwise or clockwise, and when its free end 5a crosses the photointerrupters 21 and 22.22a, each photointerrupter receives its detection signal. is sent to control device C.

In FIG. 4, the control unit includes a control circuit C having a circuit board 16 for controlling the motor 2 using an IC (including an illumination counter IC), a semiconductor relay element, a resistor, etc., and its power supply from a commercial power supply. It consists of a transformer 17 necessary for manufacturing the electric motor 2, and a control circuit that switches the duty ratio of forward and reverse rotation of the electric motor 2 in synchronization with a detection signal of the rotational position of the shielding plate 5 of the photodetecting element.

The control circuit includes a photodetector element 20.21.22.22a.
Two input signal sources, a start switch and a timer switch, and a humidity counter are connected to the bottom of the control circuit, and transmit a start signal, a timer signal, and a humidity numerical value signal to the control circuit. Other control circuits use commercial power ACl 00V.
is the output A08 of the transformer as the power source for driving the electric motor 2.
V is connected to create a 5V DC power supply for the control circuit.

Further, a power supply display LED and electric IN2 are connected as outputs.

The rotation of the electric motor V12 is such that when the shielding plate 5 is rotating counterclockwise, the duty ratio of forward rotation to reverse rotation is set to 6:5 by this control circuit C, and when the shielding plate 5 is rotating clockwise. The above duty ratio is set to 5:6 when

Therefore, the electric motor 2 is controlled by this control section in the following order to cause the lens holder 14 to move up and down via the movement means and transmission means.

Before and during the dyeing operation, the lens is lowered from the lowermost position of the lens in a large period up-and-down motion to wet the non-immersed part of the lens. Next, the operating means of the lens staining apparatus of this embodiment will be explained with reference to the image filter El-1) 7-1 in FIG. The interrupter 20 is the shielding plate 5
rotate in the CWh direction until it is shielded by. When it is shielded, electric I! I2 stops (steps 1-5)
.

A power reset is used to reset the power to the original position when the power is turned off while the device is in operation due to a power outage, etc., and then the power is turned on again. The board automatically returns to its original position,
Since the machine is designed to stop, the above operation is not performed.

■ When the start switch is pressed while the electric motor 2 is stopped in ■, the electric motor I12 rotates in the CCWh direction, and the photointerrupter 21 for detecting the start position and upper limit position
stops as soon as it is shielded by the shielding plate 5 (steps 6 to 9)
.

■ When the timer SW is turned on at the time of ■, it is confirmed that the start switch is ON, and the number of temperature measurement is set by the function of the control circuit C, and the moistening operation ('l is started. That is, the motor 2 is rotated in the CCWh direction, passes the lower limit position photo ink clubter, and rotates in the CCWh direction until it is sensed by the wetting SW.Therefore, the movement of the lens in the dyeing bath is caused by the movement of the reel on the disc in the CCW direction. As it rotates and rewinds the transmission thread, the lens moves (descends) beyond the position to be dyed (lower limit: first to interrupter).

Next, when the motor is sensed by the wetting SW, the rotation in the CCWh direction of the motor is turned off, and the rotation in the CW direction is turned on, and the motor rotates in the CWh direction until it is sensed by the upper limit photointerrupter SW.

Therefore, the movement of the lens in the dyeing bath is such that the reel is placed on the disk at C.
W rotates in the force direction and winds up the transmission thread, so the lens is pulled up from the lowest position and the photo interrupter S at the upper limit position
Stop at W (steps 10-15).

■ Next, Cladiene h staining starts from this upper limit position 11~interrupter! Iti is done. Therefore, the electric motor is rotated counterclockwise at a rate of 6 and clockwise at a rate of 5 by the action of the control circuit C, and the shield plate is rotated at the lower limit position;
This movement continues until the l-interrupter 22 is shielded (Stella 11G).

■ When the shielding plate 5 shields the lower limit 1 blue detection river f A1 to the incretor 22, the electric) number 2 (, 1, 1f of the control circuit C
anti-fl by ilj:'x i, 15 in + direction, C
It rotates in the WjJ direction at a rate of 6, and the movement is made while the shielding plate 5 shields the 11th limit)A>1 and 21.
+Jru (step 17.18).

■ During the timer S W h < A, (4)
i) is repeated (to 20 and 1G)
19'),.

If you hit the timer SW or A, it will be 1 lil! While the plate 5 introduces the incretor 21 to the screen, the movement of (preferably, the movement in ■) continues as it is, but when the shield is removed, the electric motor 2 rotates clockwise, and the shield plate 5 blocks the origin photointerrupter 20 (step 21).

In addition, the wetting operation includes the initial wetting operation (steps 12 to 15).
), during the vertical movement (steps 16 to 1),
Perform wetting operation.

Therefore, the period of the vertical movement is measured, and for each periodic movement, the period is counted by a counter built in the control circuit (for example, Toshiba TC401618F), and the humidity counter signal set in step 2 is counted. When the exchange is done and the count counter and wetness counter match,
The counting counter is reset and a wetting operation is performed.

If the count counter and wetness counter do not match,
The vertical movement continues as it is.

The rotation of the electric motor 2 is controlled by an electronic circuit of a control circuit composed of the IC1 semiconductor relay element, with a duty ratio of forward rotation to reverse rotation of 6:5 (in the case of counterclockwise direction 7j) or 5:6 (in the case of clockwise direction). ) is set. The change in the duty ratio of normal rotation to reverse rotation of the electric motor 2 from 6:5 to 5:6 is due to the fact that the shielding plate 5 attached to the rotating shaft of the electric motor 2 crosses the photointerrupter 22 for detecting the lower limit position. 7j, conversely, ir' of electric motor 2,
, 2.I reverse rotation density ratio 5:6 to 6:E) is changed when the shielding plate 5 touches the upper limit position detection first hinge clutch 21. In this way, F A1~(
The converter 21 is effective only when the electric motor 2 is rotating with a decoder ratio of 5% l6, and
] --- When rotating at the J ratio, even if the shielding plate 5 passes through the interrupter 21 to the fuse A1, the control section does not transmit the detection signal U to the same gate I↓, and changes the duty ratio. The same applies to the photointerrupter 22, which is effective only when the electric motor 2 is rotating at a forward rotation to reverse rotation ratio of 6λ15.

Furthermore, as one of the features of the present invention, one cycle of the electric motor 2 (
The angle at which the shielding plate 5 (or disk 1) advances during normal rotation and reverse rotation is α, and
When the angle between them is β, β/α− is set so that it is not an integer. That is, this is to randomize the timing at which the shielding plate 5 crosses the photointerrupters 21 and 22, and to randomize the turning positions of the top and bottom points of each cycle of the large-cycle vertical movement of the lens holder 14. .

Specifically, in this embodiment, α is set to 12.5° and β is set to 112°.

This setting method first sets the value of α as a fixed value,
Next, there is a method of setting the value of β by taking a candy in which β/α does not become an integer value, or conversely, it may be set from β.

In this embodiment, the waveform of the signal that controls the rotation of the (5011z) motor is shown in Figure 6. In the case of ■, the duty ratio is 6:5, and in the case of ■, the duty ratio is converted to 5 : This is the case of 6.

Therefore, the duty ratio is explained in the case of (to)
is the ratio between Calculated by the product of

In this example, the values are (f) = 0.832 [S], (b) = = 0.624 (S), and one cycle is 1.456 (S).
).

Therefore, in this example, the driving angle of the electric motor is 50Hz,
In the case of an IORPM motor, when the shielding plate 5 crosses the photointerrupters 21 and 22, the motor 2 is in the middle of one cycle and rotation has not yet finished. It is superimposed on the rotational motion.

In this way, even if the positions of the photointerrupters 21 and 22 are fixed, the lens holder 14 can be moved up and down in small cycles and in large cycles. Due to immobile motion, the positions of the highest and lowest points are not constant.

The small-amplitude, small-period vertical movement and the large-period vertical movement of the bokashi dyeing device of the present invention will be explained. FIG. 7 is a diagram showing the movement (v) locus of the lower end of the lens according to this embodiment. The movement is converted into a -2 downward movement of lifting and lowering the lens holder 14 connected to the thin end of the transmission thread 4, and the continuous movement becomes a small amplitude, small period up and down movement, resulting in a positive movement. One cycle of rotation and reverse rotation is one cycle of vertical movement. (for example,
Shown in a and b of FIG. ) Also, the duty ratio of forward rotation to reverse rotation of electric motor 2 is 1:
Since it is not 1, the difference in momentum between forward rotation and reverse rotation is equal to the amount of rotational movement of the thread reel 3 on the disk 1. Even more electric I! ! ! Changing the duty ratio of I2 determines the general direction of rotation of the thread reel 3, which moves counterclockwise or clockwise.

Therefore, the rotational motion of the thread reel 3 on the disk generally moves in a fixed direction while the electric Vs2 is driven at a certain duty ratio, and reverses when the duty ratio is changed. moving in the direction. That is, the bobbin reel 3 reciprocates in a certain section on the disk (between the upper limit position SW and the lower limit position @SW). The reciprocating motion is converted into a vertical movement of the lens holder 14 by raising and lowering via the transmission thread 4, and the duty ratio is changed from raising to lowering.
It means a change from Lf (for example, from C to d shown in FIG. 7) or from a downward movement to an upward movement (for example, from d to e in FIG. 7). One cycle of the reciprocating motion of the thread reel over a certain period on the disk (for example, f shown in FIG. 7) is one cycle of vertical motion, and the continuous motion of this cycle is equivalent to the same cycle of 1111. h It is a downward motion.

Therefore, the thread reel 3 moves over a certain section on the disc while winding and unwinding the transmission thread 4 by the forward and reverse rotation of the electric motor 2, and performs a backward motion. Through the transmission thread 4, the lens holder 14 is given a compound motion of a small amplitude, small period, downward movement and a large period, vertical movement, and the immersion time and position in the dyeing bath are controlled, and the lens surface is A continuous staining concentration gradient is applied to the

Next, we will explain the motion of the thread winding reel on the disk and the winding and unwinding motion.

Since the thread reel 3 is eccentrically attached to the electric motor 8120 rotating shaft, the amount of rotational movement is not constant.

That is, since the amount of eccentricity with respect to the rotating shaft of the electric vs2 changes at the contact point between the transmission line 4 and the thread reel 3, the angular velocity of the thread reel changes.

Therefore, since the duty ratio of the electric motor 2 is controlled by J2 per time by the electronic circuit, the amount of winding and unwinding of the bobbin winder 3 changes, and furthermore, the amount of rotational movement also changes. (For example, see O and h in Fig. 7.) In other words, the winding and unwinding of the transmission thread 4 of the thread winding reel 3 is performed on the circumference of the geometric center of the reel, so from the geometric center, the transmission thread 4 The angular velocity of the contact portion between the reel and the reel differs depending on the direction of eccentric rotation of the reel.

Specifically, when the thread reel 3 rotates counterclockwise eccentrically, the duty ratio of the forward rotation to the reverse rotation of the electric motor 2 is 6.
In the case of pair 5, the winding and unwinding of the transmission thread 4 increases (section C in FIG. 6).

Also, when the bobbin reel 3 rotates eccentrically in the opening direction,
Since this is the time when the angular velocity claw is decreasing, the amount of winding and unwinding of the transmission thread 40 gradually decreases, with the time of changing the duty ratio being the maximum. (Section d in Fig. 5) Therefore, when the thread reel 3 is rotating counterclockwise, the immersion movement of the lens boulder 14 increases the unamplitude amount to - and performs a short period vertical movement. At the same time, increase the rate of descent to the staining liquid level and avoid increasing the amount of immersion of the lens. Roughly speaking, when the bobbin winder 3 is rotating in the direction 81, the lens is pulled up while reducing the vertical amplitude and performing a small period vertical movement. That is, the lens is lifted from the staining liquid level at a fast upper arm speed in the initial stage and at a slow one arm speed in the later stage. By continuously performing this movement in the counterclockwise direction and the time-opening direction, the lens holder 14 is given a small amplitude, small period vertical movement and a large period vertical movement ('J'' Can be done.

Next, referring to FIG. 8, the state of movement between the thread winding reel and the lens holder will be specifically explained.

Fig. 8a shows the device in the 11th position, the shielding plate 5 is in a vertical position, and the lifting thread 6 pushes the transmission thread 4 to release water. It's across the street.

In Figure 8, the power is turned on and the IJ shape r11 is set, and the positions on both sides of the shielding plate -2/l-5 are 31 degrees and 4 degrees clockwise from the horizontal direction.
7 degrees, and the pulley 6 for the ref l- is located at the left end of the shielding plate 5 and 9
It is in the direction of the angle that makes 0 degrees.

FIG. 8e shows a state in which the thread winding reel 3 is displaced clockwise, the transmission thread 4 is wound in the most, and the lens boulder 14 is at the highest limit. In addition, the eccentricity of the rotation axis of the thread reel 30 with respect to the rotation axis of the disc 1 is the smallest, and if the rotational angular velocity of the electric 1Jl 1 machine 20 is W, then the rotation speed of the contact portion between the transmission line and the thread reel 3 ■ is V-kW
Rl (k constant, W - angular velocity, R1 - radius (eccentricity)
), which is the case when the amount of eccentricity of the thread reel with respect to the rotating shaft of the electric motor is minimum. That is, it is an amplitude point at which the rotational speed of the reel and the amount of movement of the winding and unwinding of the transmission line are at a minimum, the amount of rotational movement of the reel is also at a minimum, and the amount of amplitude of the small-amplitude, small-period vertical motion is at a minimum; This is the most -L point of the large-period vertical motion.

FIG. 8d shows the state in which the bobbin reel 3 is most eccentric in the counter-opening direction, and the state in which the transmission thread 4 is most unwound and the state in which t[
The lens holder 14 is at its lowest limit, and the eccentricity of the rotation axis of the thread reel 3 with respect to the rotation axis of the disc is the largest, and the angular velocity of the thread reel 3 is V = k w
R2 Do 4T is the time when the deviation 6 amount of [dog] is maximum, the angular velocity etc.
11 The amplitude of the small-period vertical movement is the maximum ゛C, and the large-period J = "7: The lowest point of the movement is reached.

FIG. 8C shows a state in which the cutoff number 5 is sensed by the wet SW 22 a, and this wet SW 22 ;1 is a state in which the reel is further rewound than the lower limit SW, and the lens Chromosome location tffJ J, IτbJ
The lens is immersed in a dye bath.

In addition, the dyeing position of the lens can be easily set by adjusting the length of the transmission thread at the dyeing solution level C (length of the transmission thread). This is done by variably moving the left/right l/j direction of the pulley 9 shown,
It can also be adjusted depending on the edge-finished lens, un-finished edge-layered lens, lens outer diameter, etc.

(75m and 4.5771 in Fig. 1 indicate the lens diameter, and if the lens is 65φ, slide the bunily to an intermediate position.) Although the present invention has been explained in the form of an example, the present invention is 1. The present invention is not limited to the above-mentioned embodiments, and can be modified in various ways within the scope of the claims.

For example, in the above embodiment, the range of exposure is set and covered by the position of the photo interrupter (upper limit SW1 lower limit SW), but it can be set freely by changing the degree of eccentricity of the reel, the width of the shield plate, etc. can do. Furthermore, the resistance within the board that determines the amount of rotation of the motor can be made variable (
For example, it is possible to set it by setting it to Ω) from 0 to 100 and adjusting it.

In the above embodiment, the detection means is a photoelectric element, and 77
11-Interrupter is used, but in addition, in the means for detecting the rotational position of the reel, the rotational position information is transmitted by a shield plate disposed on the disc in this embodiment. The device is not limited to photoelectric devices, and microswitches, proximity switches, reed switches, etc. can also be used.

Further, a circuit using a CPU based on computer programming, a sequence controller, etc. can be used as the control circuit.

The transmission line that winds the reel and causes it to unwind can be used as long as it is made of material (e.g. metal, synthetic resin, etc.), has a shape such as size, diameter, length, etc. that can transmit the winding and unwinding motion. Furthermore, the method of transmitting the rotational motion of the reel to the vertical motion of the lens holder is not particularly limited, although a pulley and a transmission line are used in this embodiment.

Further, the wetting operation can be performed before the initial lens dyeing, during the period of vertical movement of the lens dyeing, or by a combination of the two as in this embodiment.

The soaking time is usually about 1 to 2 seconds to wet the lens surface before dyeing the lens. The dyeing time depends on the dyeing conditions such as dyeing concentration, type of dye, dye bath concentration in the dyed part, etc. However, if the concentration is 50%, disperse dye, dyeing 111
1. 50% dryness at 85°C, 30 minutes.In that case, the wetting operation is performed only once in the initial stage, and a good blur-dyed lens can be obtained.2. (Efficacy of the invention in Song Dynasty) The dipping operation mechanism of the inventive dyeing device is electrically operated.
V! Reel eye by switching between forward and reverse rotation of A.
The winding and unwinding of the lens is performed by eccentric rotation of the reel.The lens holder connected to the other end of the transmission thread is given a small period vertical movement and a large period vertical movement, so that the lower end of the lens is Initially, the lens enters the tank at a slow speed, then gradually increases its speed. When the lens reaches the lowest position, it starts to be pulled up. Therefore, it is possible to manufacture a gradient end lens having a good density gradient without staining streaks or the like.

In general, since the lens has the wetting operation IaW4, the border between the undyed part and the dyed part on the lens surface is dyed in a hydrophilic state, so that staining streaks can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a front view of the dipping operation mechanism of the Pokashi dyeing apparatus according to the embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a partially enlarged view of the detection section of the operation mechanism, and The figure is a circuit diagram of the control section of the reversible synchronous motor, Figure 5 is a flowchart, Figure 6 is a diagram showing the waveform of the signal of the control circuit, Figure 7 is a curve showing the trajectory of the movement of the lower end of the lens, and Figure 8 is a diagram showing the waveform of the signal of the control circuit. The figure is a characteristic diagram showing the driving state of the moving part and the transmission part of the operating mechanism, Figure 9 is an IJ Toktake diagram showing the relationship between the concentration and soaking time of V3 lenses, and Figure 10 is the lower end of the lens by the conventional blur dyeing device. FIG. 11 is a diagram showing the immersion movement of the lens according to the conventional method. 1... Disk 2... Reversible synchronous electric IfIj machine 3... Thread winding reel 4...
・・Transmission thread 5・・・・Shielding plate 6・・・・
・Lift pulley 8...Lens holder 20...Origin photo interrupter 21...
・Photo interrupter for detecting start position and upper limit position

Claims (1)

[Claims] In the immersion operation mechanism of the Bokashi dyeing device, in which a lens is immersed in a dyeing bath containing a dyeing solution and a continuous dyeing concentration gradient is applied to the lens, an electric motor is used as a driving means, and the eccentricity is fixed to the rotation axis of the electric motor. A transmission means consisting of a rotary movement means of a reel that rotates, a transmission thread whose one end is connected to a lens holder for holding a dyed lens and connected to the reel, and eccentric movement of the reel and rotation of the wet lowering position. a detection means for detecting the position; and a detection means for switching the rotation of the electric motor between forward rotation and reverse rotation, and in which the rotation ratio of the forward rotation and the reverse rotation is not the same, and in synchronization with the detection signal of the detection means, the rotation of the electric motor is switched. control means comprising a control circuit that inverts the duty ratio of forward rotation and reverse rotation and reverses the forward rotation and reverse rotation of the motor for wet descent and return to rotational motion; , a wet downward motion and a small amplitude are caused to the lens holder connected to the other end via the transmission thread due to the combined slow movement of winding and unwinding of the transmission thread of the reel and eccentric rotation of the reel by switching the rotation of the reverse rotation. A lens staining device characterized by imparting a small period vertical motion and a large period vertical motion.