JPH02216101A - Device for coating lens with sumi - Google Patents

Abstract

PURPOSE:To always keep the distance between a lens and a discharge port constant by approximately matching the center of turning of a sumi (Indian ink) discharge part to the end face of the discharge port and performing the easy control to only change the direction of the discharge port. CONSTITUTION:A center D of turning in the direction of an arrow theta of a sumi discharge part 11 of a sumi coating device which adjusts the light transmittance of the lens approximately coincides with the end face of a discharge nozzle 23. At the time of sumi coating, a lens W is set on a turntable 18 and is rotated by a rotating means 14, and the discharge part 11 is moved to the position where coating on the lens W is started, and thereafter, the nozzle 23 is turned to coat the lens with sumi. The position in the direction of the arrow theta of the nozzle 23 is only changed to keep the distance between the lens W and the discharge port 23 constant in this system though a moving means 12 is longitudinally and vertically controlled in a conventional system, and the control is very simplified.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a lens sanitizing device that applies lens black to the surface of a lens used in an optical system in order to adjust the light transmittance of the lens. .

[Conventional technology]

As lenses for optical systems, in addition to total transmission types and total reflection types, partial transmission types are also used, in which the ratio of the amount of transmitted light is adjusted.One way to adjust the light transmittance of a lens is to A method is adopted in which lens ink of a predetermined density is applied to the lens.

Conventionally, lens inking has been carried out manually, such as by pressing an absorbent material such as a sponge soaked with lens ink onto a rotating lens.

However, methods that rely on manual labor tend to produce defective products due to misaligned ink painting or uneven coating.

Therefore, it has been proposed to automate the redacting process.

FIG. 3 is a perspective view showing the main parts of the lens sanitizing device according to this existing embankment plan.

In FIG. 3, when discharging lens ink from the ink discharging unit 1 to the lens W positioned in front, the lens W
In order to make the thickness of the lens ink coating film formed on the surface of the lens W and the tip (discharge port) of the ink discharge part 1 uniform,
It is necessary to keep the distance constant while adjusting the position and direction of the ink discharge section 1 in accordance with changes in the coating position on the lens W.

In the lens ink pot device according to this existing proposal, a swing support bracket 2A is provided on the moving means 2 that moves in the front-rear direction (X direction) and the up-down direction (Z direction), and as shown in the figure, 1 was rotatably supported in the θ direction about the pivot axis C by having its base end pivotally supported by the bracket 2A.

Therefore, in the lens ink pot device according to the existing proposal,
As is clear from FIG. 3, in order to maintain a constant distance between the lens W and the ejection port of the ink ejection unit 1, it is necessary to It was necessary to change three positions at the same time including the turning position.

That is, while simultaneously controlling the three movements of the moving means 2 that supports the ink discharging section 1 in the front-rear direction, vertical direction, and rotation direction, while keeping the distance between the lens W and the discharge port of the ink discharging section 1 constant. The ink was applied evenly.

[Problem that the invention seeks to solve]

However, in the lens ink pot device according to the above-mentioned proposal, it is necessary to simultaneously change the movements of the infant discharge section 1 in the front-rear direction, up-down direction, and rotational direction. study)
Alternatively, it was necessary to adopt a control method of controlling the trajectory of the ejection port when the ink ejection section 1 moves.

In the former method, it is very difficult to teach the ejection points finely, and the moving speed is slow, resulting in a large amount of time being spent on the sanitizing process, which reduces productivity.

On the other hand, in the latter case, in order to control the trajectory of the ejection port when the ink ejection unit 1 moves, it is necessary to perform a lot of arithmetic processing based on a complicated program, which increases the control cost.
The cost benefit will decrease.

The present invention has been developed in view of these conventional technical problems, and provides a simple configuration and inexpensive control for maintaining the distance between the discharge port of the black discharge section and the blackening point of the lens at all times. It is an object of the present invention to provide a lens ink pot device that can be practiced and facilitated in teaching.

[Means for solving problems]

The present invention provides a black ink discharging section for discharging ink for a lens, a moving means for moving the ink discharging section, a lens positioning means for positioning the lens, a lens rotating means for rotating the lens, and a black discharging section for performing a sanitizing operation. In a lens ink pot device equipped with a control means for controlling the ink ink pot, the above object is achieved by making the center of rotation of the ink ejecting section approximately coincide with the end surface of the ejection port.

〔Example〕

The present invention will be specifically described below with reference to the drawings.

FIG. 1 is a perspective view schematically showing an embodiment of a lens ink pot device according to the present invention.

In FIG. 1, the lens ink pot device is a lens ink pot (
an ink discharge part 11 that discharges cough ink discharge part 11; a moving means 12 that supports the cough ink discharge part 11 and moves it in the front-rear direction (X direction), the up-down direction (two directions) and the up-down rotation direction (theta direction); and a lens. The lens positioning means 13 fixes and holds the lens W in a predetermined position, and the positioned lens W is moved in the direction of the arrow R (
a drying means 15 for drying the ink applied to the lens W; and a control means 16 for controlling the ink discharge section 11, the moving means 12, and the lens rotating means 14; , is equipped with.

The black ejection unit 11 has its ejection amount, ejection timing, etc. controlled by the control means 16 via an ejection drive circuit (driver) 17.

The lens positioning means 13 includes a rotary table 18 on which the lens W is mounted, adjustable lens centering means 19a and 19b for aligning the center of the lens W with the center of the rotary table 18,
19C.

The lens rotating means 14 is composed of a motor that rotates the rotary table 18, and rotates the lens W together with the lens positioning means 3.

The drying means 15 can be composed of, for example, a dryer that blows warm air onto the black painted surface of the lens W.

The process of sanitizing the lens W is performed in the following steps.

First, the lens W is manually set on the lens rotating table 18, and then, while rotating the lens W by driving the lens rotating means (motor) 4, the lens centering means 19a is rotated.
, 19b, and 19C to align the center of the rotary table 18 and the center of the lens W.

After the lens W has been aligned in this manner, the moving means 12 is operated to move the ink discharge section 11 to the position where the lens W starts to be painted.

The control means 16 stores a program that calculates the relationship between the number of rotations (peripheral speed) of the lens W, the feeding speed in each direction of the ink discharge section 11, and the coating film of the ink ink, so that the desired ink application can be achieved. By specifying the mode, the lens rotation speed and the feed speed of the black discharge section 11 are determined, and based on these, the lens W is automatically blackened. When the ink discharge part 11 reaches the end position of coating the lens W, the ink discharge is stopped, and while the lens W continues to rotate, the drying means 15 is operated to dry the lens ink applied to the lens W.

When the lens ink finishes drying, the rotation of the lens W is stopped, and the lens W that has been inked is removed.

Through the series of operations described above, the lens W can be automatically sanitized with high accuracy, and misalignment of the sanitizer and uneven coating can be eliminated.

Therefore, according to the present invention, the center of rotation of the ink discharge section 11 in the θ direction substantially coincides with the end surface of the discharge port of the cough ink discharge section 11.

FIG. 2 is a partial perspective view showing the positional relationship between the ink discharging section 11 and its center line of rotation.

In FIGS. 1 and 2, a pivot bracket 21 is provided on the top of the moving means 12 that is movable in the front-back direction (X direction) and the vertical direction (Z direction). The ink discharge section 11 is rotatably supported via a shaft 22 .

In the illustrated example, the infant discharge section 11 is provided with a nozzle 23 that protrudes in the direction of the lens W, and the opening at the tip of the nozzle 23 forms a discharge port.

The center of rotation D of the ink discharge section 11 (the center of rotation of the support shaft 22) is arranged so as to substantially coincide with the end surface of the discharge port at the tip of the nozzle 23.

Note that the discharge port of the ink discharge section 11 is an opening formed in the front wall of the liquid chamber, for example, at the tip of the nozzle 23 shown in the figure.
It can also be configured with an opening at the tip of a fork drilled in a solid block, and in these cases as well, it is arranged so that the center of rotation of the ink discharge portion 11 and the end face of the discharge port are approximately aligned.

According to the lens brushing device described above, the black discharging section 11
is movably supported relative to the lens W in the front-rear direction, up-down direction, and rotational direction 1, and maintains a constant distance between the discharge port of the black discharge section 11 and the blackening point of the lens W to perform uniform blackening. In the ink painting device configured to perform this, the center of rotation of the ink discharge part 11 and the end surface of the discharge port are made to almost match, so that the rotation direction (θ direction) can be adjusted without changing the position in the front-rear direction and the vertical direction. A lens ink that makes it possible to maintain a constant distance between the ejection port and the lens W by simply changing the position of the ink, and uniformly ink the lens W with inexpensive control and simple teaching. A coating device was obtained.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, there is provided a black ink discharging section for discharging ink for a lens, a moving means for moving the Ml discharging section, a lens positioning means for positioning the lens, and a lens positioning means for rotating the lens. In a lens sanitizing device comprising a lens rotating means, a drying means for drying the ink applied to the lens, and a control means for controlling the sanitizing operation, 3, the center of rotation of the black ink discharging section is approximately aligned with the end surface of the discharging port. Since the configuration is made to match, when controlling the position of the black ejecting section,
It is now possible to maintain a constant distance between the discharge port and the lens even if only the position in the rotational direction is changed without changing the position in the front-rear direction or vertical direction, resulting in uniform and high-precision lenses with inexpensive control. To provide a lens sanitizing device which can perform sanitizing and teaching easily.

[Brief explanation of the drawing]

Fig. 1 is a perspective view schematically showing an embodiment of the lens ink pot device according to the present invention, Fig. 2 is a partial perspective view schematically showing the ink discharge part in Fig. 1, and Fig. 3 is an existing proposal. FIG. 2 is a partial perspective view schematically showing an ink discharge section of the lens ink pot device according to the present invention. 11-----Black discharge section, 12-----
・〜Moving means, 3・−・−−−1−−−−Lens positioning means, 4−・−・−・・−・Lens rotation means, 6・・
--- Control means, w----- Lens,
D・--・----- Center of one turn.

Claims (1)

[Claims] (1) A black ink discharging section that discharges ink for a lens, a moving means for moving the ink discharging section, a lens positioning means for positioning the lens, a lens rotation means for rotating the lens, and a A lens sanitizing device comprising a drying means for drying ink and a control means for controlling a sanitizing operation, characterized in that the center of rotation of the ink discharging section is substantially aligned with the end face of the discharging port. .