JPH0734883B2 - Lens dyeing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a lens dyeing device, and particularly preferably to a lens dyeing device suitable for imparting a dyeing density gradient (blur dyeing) to the surface of a spectacle lens. Regarding

(Prior Art) In recent years, plastic lenses are
A fashionable lens rich in color change can be produced, and in particular, a gradient (blurring) lens in which the dyeing density gradient is continuously changed has high added value due to high fashionability. Generally, a dyeing apparatus for a plastic lens has a dyeing bath, a mechanism for adjusting the temperature of the dyeing bath, and a lens dipping operation mechanism for holding the lens and performing dipping operation in the dyeing bath.

The principle of gradation dyeing is to give a continuous dyeing density gradient to the lens surface by changing the immersion time and the immersion position of the lens in the dyeing bath, and the lower end of the lens is dyed at the time of dyeing as shown in FIG. In order to draw a motion locus, a small amplitude small period vertical vibration and a large period vertical motion are performed in the dye bath to perform a combined motion. As such a conventional lens dyeing apparatus, for example, Japanese Patent Publication No. 56-10105 discloses that by controlling a belt stretched through a plurality of pulleys and a belt-pressing rotating rod linked with an electric motor, a Japanese Patent Publication No. −
In the 55604 publication, a blur dyeing device that performs the above-described compound motion is provided by a cam member that is interlocked with an electric motor and that has irregularities formed on its periphery, a movable arm that interlocks with the cam member, and a spring member that is connected to a lens holder. It is disclosed.

(Problems to be Solved) Generally, the relationship between the dyeing concentration of a plastic lens and the immersion time is as shown in FIG. 8, in the initial stage of immersion, the dyeing speed is fast, the dyeing concentration progresses rapidly, and the immersion time becomes long. The dyeing speed slows down, and eventually the dye is fixed at a predetermined saturated dyeing density.

Therefore, in order to make a good blur dyeing lens, that is, to make the dyeing gradient constant (continuous), the movement of the lens dipping operation in the blur section of the lens surface should be slow at the initial stage when the lower end of the lens penetrates into the dyeing solution. Immerse at a speed, then gradually increase, and when the lower end of the lens reaches its lowermost immersion position, this time the lens pulling operation from the dye bath is started, the pulling speed is fast at the beginning and later It is preferable to control so as to have a change. However, the aforementioned Japanese Patent Publication No. 56-10105 and Japanese Patent Publication No. 57
In the immersion operation mechanism disclosed in Japanese Patent Application Laid-Open No. 55604, the cycle of the lens immersion movement draws a sine curve curve as shown in FIG. 9, and therefore the lens is moved to the lowest point or the highest point of the amplitude. The change in the immersion speed is slow, while the change in the immersion speed of the lens is maximum at the intermediate position between the lowest point position and the highest point position. That is, since the immersion speed in the uppermost immersion part of the lens is slow, the speed change of the immersion time from the non-stained part of the lens to the part having a continuous concentration gradient is small, and the concentration gradient difference is continuously imparted. There was a problem that it was difficult.

The present invention has been made to solve the above problems, and an object thereof is to provide a lens dyeing device for manufacturing a blurring lens having a good density gradient without dyeing streaks.

(Means for Solving the Problem) The present invention has been made to achieve such an object, and a lens is immersed in a lens dyeing apparatus for manufacturing a dyed lens by immersing the lens in a dyeing bath containing a dyeing solution. The operating mechanism includes a motor that performs forward and reverse rotations, a rotating body that is arranged to interlock with the rotation of the motor, and is mounted on the rotating body and eccentrically attached to the rotating shaft of the motor. And a bobbin reel that performs an eccentric rotation device about a rotating shaft on the rotating body, one end of which is connected to the bobbin reel and the other end of which is connected to a lens holding unit via a transmission unit including a pulley. Transmission thread for transmitting the eccentric rotation movement of the bobbin reel and the winding and unwinding of the reel due to the forward and reverse movements of the motor to the vertical movement of the lens holding means, and detection for detecting the rotational position on the rotating body. Means and the inspection Forward of the motor in synchronization with the detection signal of the means is to provide a lens dyeing apparatus which comprises a control means for controlling the change of the rotational direction of the switching and the rotation ratio of the reverse.

Further, preferably, in addition to the above configuration, the rotating body is a disk, and the detecting means is a predetermined angle corresponding to a shield plate engaged with the disk and a rotation trajectory of the shield plate. At a position on the base of the lens dyeing device, and two photo-detecting elements, one of the photo-detecting elements detects a forward motion of the motor, and the other of the photo-detecting elements is a detector of the motor. It is a detector that detects the reverse movement.

(Function) Winding and unwinding of the reel transfer yarn linked to the motor rotation axis and eccentric rotation of the reel motor rotation axis, which is linked to the rotation axis of the motor due to the rotation switching of the motor between normal rotation and reverse rotation and the difference in rotation ratio (duty ratio). Since the lens holding means connected to the other end of the transmission yarn by the motion is given a small amplitude small period vertical movement and a large period vertical movement, the lower end of the lens enters the dye bath. Enters at a slow speed, gradually increases, and when the lens reaches the lowest position, pulling is started, and the pulling speed is fast at the beginning and slows down later.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 6.

FIG. 1 is a front view of the main part of the blurring lens dyeing device of this embodiment, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is an outline of the detection means of the device of FIG. FIG. 4 is a diagram for explaining the driving state of the immersion operating mechanism of the apparatus of FIG. 1, FIG. 5 is a diagram for explaining the movement locus of the lower end of the lens, and FIG. 6 is a circuit diagram of the control unit.

(Structure of Dyeing Device) In FIG. 1, the center of a disk 1 is pivotally supported by a rotary shaft (output shaft) of a reversible synchronous motor (motor) 2 (see FIG. 2), and further on the disk 1. A bobbin reel 3 is eccentrically attached to the rotary shaft of the motor 2.
One end of a transmission thread 4 (rope-natural fiber, artificial fiber, metal or the like can be used) is connected and fixed to the circumferential reel groove 3a (shown in FIG. 2) of the winding reel 3, and its fixing position 3b. Is on the maximum eccentric point of the bobbin reel 3, that is, an extension of a straight line L passing from the rotation center point 3c of the bobbin reel 3 to the geometrical center point 3d of the bobbin reel. Further, a shield plate 5 which is an L-shaped metal fitting is attached to the back surface of the disc 1 in the radial direction on the rotation shaft of the motor 2. The tip 5a of the shield plate 5 is bent almost at a right angle from the outer peripheral edge of the disk 1 toward the substrate 16 of the device. (See FIG. 2) A connecting plate 7 is mounted on the spool 3 along the radial direction of the disc 1 with the axis of rotation of the disc 1 as the axis. A lift pulley 6 is arranged at the tip of the connection plate 7, and the lift pulley 6 is adapted to interlock with the rotation of the connection plate 7. The lift pulley 6 is arranged at a position deviated from the shield plate 5 clockwise by about 106 degrees.
Further, fixed pulleys 8, 9, 10, 11, 12, 13 (see FIG. 2) for guiding the transmission yarn 4 are arranged on the base of the main body device, and these pulleys are shown in FIG. Further, as shown in FIG. 2, the lifting pulley 6 and the winding pulley 3 are arranged so that the winding and unwinding movements of the transmission yarn 4 tied to the winding reel 3 can be changed to vertical movements.

As shown in FIG. 1, a power switch (SW) 30 is provided above the pulley 10, a power display LED 31 and a start switch (SW) 32 are provided to the left of the power switch 30, and the pulley 10 is further provided. A dyeing timer 33 is provided on the left of the dyeing timer 33. The dyeing timer 33 is for setting the dipping motion time, and can be adjusted in units of 10 minutes.

Reference numeral 20 is a photo interrupter for the origin, reference numeral 21 is a photo interrupter for detecting the start position and the upper limit position of the large-cycle vertical movement, and reference numeral 22 is a photo interrupter for the detection of the large-cycle vertical movement lower limit position. It is a photo-detecting element, which is one of the means. FIG. 3 is a diagram for explaining the arrangement positions of these detection elements.

Reference numeral 40 indicates the rotation locus of the shield plate 5, and the detection element is arranged on this locus. Origin photointerrupter
20 is located vertically above the horizon, and there is a photo interrupter 21 for detecting the start position and the upper limit position at a position offset by about 137 degrees counterclockwise from the photo interrupter 21. A photo interrupter 22 for detecting the lower limit position is located at a position offset by 112 degrees. These photo-detecting elements cooperate with the shield plate 5 to form a detecting means. When the shield plate 5 rotates counterclockwise or clockwise and its tip 5a crosses the photo interrupters 21 and 22, Each photo interrupter sends its detection signal to the controller C.

Next, the configuration of the control unit will be described with reference to FIG.

In FIG. 2, a (control) board 15, a transformer 17, and a motor 2 are arranged on a mounting board 16, and a semiconductor relay element 18 and a heat sink 19 (3 from FIG. 2 are arranged on the board 15).
A terminal regulator is included), an IC (not shown), a resistor (not shown), etc. are provided. In FIG. 2, the shielding plate 5 is shown in a downwardly moved state, and reference numeral 41 is a main body device cover, which is omitted in FIG.

The relay element 18 is an element for performing normal rotation and reverse rotation of the motor 2, and converts a 5V logic signal into a 100V system motor drive power supply signal.

The transformer 17 is used to make the power supply (DC 5V) for the logic circuit from the commercial power supply (AC 100V 50 / 60Hz).
Motor control circuit C by converting the voltage from AC 100V to AC 8V
(Fig. 6), the three-terminal regulator is a control circuit C
8V AC is rectified and smoothed to convert to a DC 5V stabilized power supply.

The heat sink 19 is the heat sink of the three-terminal regulator,
This is to efficiently release the heat generated inside the element to the outside so that the element is not thermally destroyed.

Therefore, the control unit composed of these components is a control circuit C having a substrate 15 for controlling the motor 2 using an IC, a semiconductor relay element, a resistor and the like, and a necessary transformer 17 for producing its power supply from a commercial power supply. And the photodetector element is synchronized with the detection signal of the rotation position of the shield plate 5 in synchronization with the motor 2
It is composed of a control circuit for switching the duty ratio between the forward rotation and the reverse rotation.

Further, as shown in FIG. 6, two input signal sources of a start switch and a timer switch are connected to the control circuit in addition to the photodetector, and the start signal and the timer signal are transmitted to the control circuit. . In the other control circuit, AC100V of the commercial power supply is connected as the power supply for driving the motor 2, and the output AC8V of the transformer is connected to generate the power supply DC5V of the control circuit. As an output, power supply display LED31 and motor 2
Are connected.

The shield plate 5 rotates counterclockwise when the forward / reverse duty ratio of the motor 2 is set to 6: 5 by the control circuit C, and when the duty ratio is set to 5: 6, Rotate in the direction.

(Explanation of Small Amplitude Small Period Vertical Movement and Large Period Vertical Movement of Dyeing Device) The yarn winding reel 3 winds and unwinds the transmission yarn 4 by the forward rotation and the reverse rotation of the motor 2, and the movement thereof. Is converted into a vertical movement of pulling up and down of the lens holder 14 connected to the other end of the transmission thread 4, and the continuous movement becomes a small amplitude small cycle vertical movement, and one cycle of forward rotation and reverse rotation is generated. One cycle of vertical movement.

The duty ratio of the normal rotation of the motor 2 to the reverse rotation is 1: 1.
Therefore, the difference in momentum between the normal rotation and the reverse rotation is the movement amount of the rotation of the winding reel 3 on the disc 1. Further motor 2
The change of the duty ratio of 1 determines the global movement direction of the bobbin reel 3 and moves it in the counterclockwise or clockwise direction.

Therefore, when the motor 2 is driven at a certain duty ratio, the disk-shaped rotational movement of the bobbin reel 3 moves in a general direction in a constant direction, and the duty ratio is changed. Move in the opposite direction. That is, the bobbin reel 3 reciprocates in a certain section on the disk. The reciprocating motion is converted into upward and downward vertical movements of the lens holder 14 via the transmission thread 4, and the change of the duty ratio means changing from upward to downward or from downward to upward. One cycle of reciprocating motion of the winding reel on the disc in a certain section is one cycle of vertical motion,
The continuous movement of this cycle is a large-cycle vertical motion.

Therefore, the bobbin reel 3 moves in a certain section on the disk and reciprocates while winding and unwinding the transfer yarn 4 by the forward and reverse rotations of the motor 2. The lens holder 14 is given a combined motion of small-amplitude small-cycle vertical movement and large-cycle vertical movement via 4,
The immersion time and the immersion position in the dye bath are controlled to give a continuous dye density gradient to the lens surface.

Further, since the bobbin reel 3 is eccentrically attached to the rotation shaft of the motor 2, the movement amount of rotation is not constant. That is, the angular velocity of the bobbin reel changes because the amount of eccentricity of the motor 2 with respect to the rotation axis changes. Therefore, the motor 2
Since the duty ratio of is controlled by time, the amount of winding and rewinding of the bobbin reel 3 also changes, and the amount of rotational movement also changes.

Specifically, when the bobbin reel 3 is eccentrically rotated counterclockwise, the duty ratio of the normal rotation to the reverse rotation of the motor 2 is 6:
In the case of 5, the amount of winding and rewinding of the transmission yarn 4 increases,
The rotation speed also increases. In the clockwise direction, the spool 3
The eccentric rotation is when the angular velocity is decreasing, so when the duty ratio is changed to the maximum, gradually
The amount of winding and unwinding of the transmission yarn 4 decreases.

Therefore, as shown in the locus of movement of the lower end of the lens in FIG.
The immersion movement of the lens holder 14 increases the vertical amplitude amount while the bobbin reel 3 is rotating counterclockwise, and accelerates the descending speed to the dyeing liquid surface while performing a small period vertical movement motion. Increase the immersion amount of the lens. Further, when the bobbin reel 3 is rotating in the clockwise direction, the vertical amplitude amount is reduced, and the lens is pulled up while performing a small period vertical motion. That is, the lens is pulled up from the surface of the dyeing liquid at a fast rising speed from the surface of the dyeing liquid and a slow rising speed in the latter period. By continuously performing this counterclockwise and clockwise movement, the lens holder 14 is given a small amplitude small period vertical movement and a large period vertical movement,
You can get a blur lens.

FIG. 4a shows a state in which the apparatus is stopped, and is in this state immediately after the power is turned on. The shield plate 5 is in a substantially vertical position, and the lift pulley 6 presses the transmission system 4 in a horizontal direction.

Fig. 4b shows the state when the start switch 32 is pushed with the timer 33 of Fig. 4a turned off, and the positions on both sides of the shield plate 5 are 31 degrees and 47 degrees clockwise from the horizontal direction. The lift pulley 6 is located at an angle of 90 degrees with the left end of the shield plate 5.

FIG. 4c shows a state in which the bobbin reel 3 is displaced in the clockwise direction A, the transmission system 4 is in the most wound state, and the rinse holder 14 is at the uppermost position. (See FIG. 2) Also, the disc 1
Eccentricity H of the rotary shaft of the bobbin reel 3 with respect to the rotary shaft 3C of
Is the smallest, and the rotational angular velocity of the motor 2 is W, the rotational velocity V ₁ of the bobbin reel 3 is V ₁ = kwR ₁ (k = constant, w = angular velocity, R ₁ = radius (eccentricity)) , When the eccentric amount H of the bobbin reel with respect to the rotation axis of the motor 2 is minimum. That is, the rotation speed of the reel becomes the minimum, the amplitude point at which the small-amplitude small-cycle vertical movement is minimized, and the maximum point of the large-cycle vertical movement.

FIG. 4d shows a state in which the bobbin reel 3 is most eccentric in the counterclockwise direction B, the transmission system 4 is in the most rewound state, the lens holder 14 is at the lowest limit, and the rotation axis 3C of the disc is rotated. On the other hand, the eccentric amount H of the rotating shaft of the bobbin reel 3 is the largest, the angular velocity of the bobbin reel 3 is V ₂ = kwR ₂ , and the eccentric amount H of γ ₂ is the maximum, and the angular velocity is also the highest. The maximum amount is the maximum amplitude of the small-cycle vertical movement, and the lowest point of the large-cycle vertical movement.

(Description of lens immersion operation) (Initial operation) When the power switch 30 is turned on and the power is reset, the motor 2 rotates in the clockwise direction A until the origin photo interrupter 20 is shielded by the shield plate 5. When it is shielded, the motor 2 stops.

When the start switch 32 is pressed while the motor 2 is stopped, the motor 2 rotates in the counterclockwise direction B to detect the start position and the upper limit position photo interrupter 21.
When is shielded by the shielding plate 5, it stops.

If the timer SW33 is turned on during (immersion operation), the motor 2
Is rotated counterclockwise B by 6 and clockwise A by a ratio of 5 by the movement of the control circuit C, and continues this movement until the shielding plate 5 shields the lower limit position photo interrupter 22.

When the shielding plate 5 shields the lower limit position detecting photo interrupter 22, the motor 2 is rotated at a ratio of 5 in the counterclockwise direction B and 6 in the clockwise direction A by the movement of the control circuit C, and the shielding plate 5
This motion is continued until the target interrupts the upper limit position detecting photo interrupter 21.

When the shield plate 5 shields the photo interrupter 21, the motor 2 rotates at a ratio of 6 in the counterclockwise direction B and 5 in the clockwise direction A by the movement of the control circuit C, and the shield plate 5 shields the photointerrupter 22 for detecting the lower limit position. Continue this exercise until you do.

While the timer SW33 is on, and are repeated.

(Ending operation) When the timer SW33 is turned off, the motion of or continues while the shield plate 5 does not shield the photo interrupter 21, but when shielded, the motor 2 rotates in the clockwise direction A, and the shield plate 5 causes the photo interrupter to be the origin. It will stop when 20 is shielded.

The rotation of the motor 2 is controlled by an electronic circuit so that the duty ratio of forward rotation to reverse rotation is 6: 5 (in the case of counterclockwise rotation),
Alternatively, it is designed to be 5 to 6 (clockwise). Motor 2
The change of the forward / reverse rotation duty ratio from 6: 5 to 5: 6 is
This is performed only when the shield plate 5 attached to the rotation shaft of the motor 2 crosses the photo interrupter 22 for detecting the lower limit position, and conversely, the duty ratio 5 of the normal rotation to the reverse rotation of the motor 2 is 5:
The change from 6 to 6: 5 is performed when the shielding plate 5 passes over the upper limit position detecting photo interrupter 21. Here, the photo interrupter 21 is effective only when the motor 2 is rotating at a duty ratio of 5 to 6, and when the motor 2 is rotating at a duty ratio of 6 to 5, the shield plate 5 passes through the photo interrupter 21. However, the control unit does not synchronize the detection signal and does not change the duty ratio. The photo interrupter 22 is also the same, and is effective only when the motor 2 is rotating at a duty ratio of 6 to 5 of forward rotation to reverse rotation.

Specifically, when the photo interrupter 21 is effective, the rotating direction of the shielding plate 5 is clockwise or reverse rotation, and when the photo interrupter 22 is effective, the rotating direction of the shield plate 5 is counterclockwise or positive rotation. is there.

Further, as one of the features of this embodiment, the angle at which the shield plate 5 (or the disc 1) advances in one cycle of the motor 2 (forward rotation and reverse rotation) is α, and the angle between the photo interrupters 21 and 22 is set. When β is set, β / α is set to a mutual relationship between the angle at which the disk is displaced and the angle between the detectors so that β / α is not an integer. That is, the shielding plate 5 is the photo interrupters 21 and 22.
This is because the timing at which the lens holder 14 crosses is random, and the folding positions of the highest point and the lowest point of the angular cycle of the large-cycle vertical movement of the lens holder 14 can be set randomly. Specifically, in this embodiment, α is set to 12.5 ° and β is set to 112 °. Therefore, 112 ° ÷ 12.5 ° = 8.96,
It will be switched at a certain point in the ninth cycle. Further, when the shield plate 5 crosses the photo interrupters 21 and 22, when the rotation of the electric motor 2 is not completed in the middle of one cycle of the electric motor 2, the remaining rotational momentum is weighted by the following rotational movement whose duty ratio is changed. To be controlled.

As described above, even if the positions of the photo interrupters 21 and 22 are fixed, the positions of the uppermost point and the lowermost point of the lens holder 14 in the small period vertical movement and the large period vertical movement are not constant.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in the above embodiment, the range of blurring is the photo interrupter (upper limit).
SW, lower limit SW) is set according to the position, but it can be set freely even if the degree of eccentricity of the reel, the width of the shielding plate, etc. are changed. Furthermore, the resistance in the board that determines the amount of rotation of the electric motor is variable (for example, 0 to 10).
0 kΩ) and can be set by adjusting this.

In the above embodiments, the detecting means was a photoelectric element and a photo interrupter was used for this, but a micro switch, a proximity switch, a reed switch or the like can be used instead of the photoelectric element.

Also, a circuit using a CPU by computer programming or a sequence controller can be used as a control circuit.

(Effects of the Invention) Since the lens dyeing device of the present invention is configured as described above, the lens dipping motion is performed while the lens dipping motion is performed while performing the combined motion of the small period vertical motion and the large period vertical motion. At the beginning of entering the liquid tank, it is immersed at a slow speed, and then gradually becomes faster. Then, when the lens reaches the lowermost position, the lens pull-up is started, and the pull-up speed changes so that the pull-up speed is initially fast and slow later. Therefore, it is possible to manufacture a blurring lens having a good density gradient without stain marks.

[Brief description of drawings]

FIG. 1 is a front view of the main part of the blurring lens dyeing device of this embodiment, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is an outline of the detection means of the device of FIG. FIG. 4, FIG. 4 is a diagram for explaining the driving state of the immersion operation mechanism of the apparatus of FIG. 1, FIG. 5 is a diagram for explaining the movement locus of the lower end of the lens, FIG. 6 is a circuit diagram of the control unit, and FIG. FIG. 8 is a diagram for explaining the relationship between the concentration and immersion time of the lens, FIG. 8 is a diagram for explaining the movement locus (1 cycle) of the lower end of the lens by the conventional blur dyeing device, and FIG. It is a figure explaining immersion movement. 1 ... Disc, 2 ... Reversible synchronous motor, 3 ... Bobbin reel, 4 ... Transmission system, 5 ... Shielding plate, 6 ... Lifting pulley, 14 ... Lens holder, 20 ... Origin photo interrupter , 21 ...... Photo interrupter for detecting start position and upper limit position, 22 ...... Photo interrupter for detecting lower limit position

Claims (2)

[Claims] 1. A lens dipping operation mechanism of a lens dyeing device for manufacturing a dyed lens by immersing the lens in a dyeing bath containing a dyeing solution, a motor for performing normal rotation and a reverse rotation, and interlocking with rotation of the motor. An arranged rotating body, a bobbin reel mounted on the rotating body and eccentrically attached to the rotating shaft of the motor, and performing an eccentric rotary motion about the rotating shaft on the rotating body, and one end thereof. Is connected to the bobbin reel and the other end is connected to a lens holding means via a transmission means including a pulley, and the reel is wound and wound by the eccentric rotation motion of the bobbin reel and the forward and reverse rotation motions of the motor. A transmission thread for transmitting the return to the vertical movement of the lens holding means, a detection means for detecting a rotational position on the rotating body, and a forward rotation direction and a reverse rotation direction of the motor in synchronization with a detection signal of the detection means. Switching and changing the rotation ratio A lens dyeing device comprising a control means for controlling the change. 2. The rotating body is a disk, the detecting means is a shield plate that is in contact with the disk, and the base of the device is at a predetermined angular position corresponding to the rotation trajectory of the shield plate. A detector comprising two photo-detecting elements arranged on a table, one of the photo-detecting elements is a detector for detecting a forward rotation motion of the motor, and the other is a detector for detecting a reverse rotation motion of the motor. The lens dyeing device according to claim 1, wherein