JPH046731A - Phosphor coating device for fluorescent lamp - Google Patents

Abstract

PURPOSE:To form a phosphor film with a uniform thickness on the whole inner face of a recess section with good workability by providing an XYZ orthogonal type robot, an arm extended in the X-axis direction on one of action sections, and one or multiple phosphor coating tools fitting to the arm at the desired interval. CONSTITUTION:An arm 14 extended in the X-axis direction of the Z-axis action section 12 of an XYZ orthogonal type robot R is moved downward on the Z-axis, and coating tools 1a, 1b, 1c are inserted into recess sections 3a, 3b, 3c of containers 2, 2,... arranged on a converying device C. Since the coating tools 1a, 1b, 1c are fitted in three lines at the preset interval in the X-axis direction, they are inserted at displaced portions on the X-axis and Y-axis. The arm 14 is continuously moved in the X, Y, Z directions by an X-axis action section 10, a Y-axis action section 11 and the Z-axis action section 12, the coating tools 1a, 1b, 1c are brought into contact with the whole inner faces of the recess sections 3a,...3f, and phosphors fR, fG, fB are coated on the whole inner faces of the recess sections 3a,...3f.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a phosphor coating device for a fluorescent lamp, and particularly to a device for coating phosphor to a uniform thickness on the entire inner surface of a concave portion of a container in which a concave portion is formed. The present invention relates to a coating device for coating.

Conventional technology Conventionally, a device for applying a phosphor suspension onto a coating surface holds a glass tube vertically, and uses a nozzle to flow the phosphor suspension down from an opening at the upper end of the glass tube. The idea was to coat the inner surface of the tube with phosphor to a uniform thickness. Although such devices are already automated, there is no known automatic device that can uniformly apply the phosphor suspension to the entire inner surface of the box-shaped concave portion, and manual spraying, Alternatively, it was done by brush painting, etc.

Problems to be Solved by the Invention With such conventional phosphor coating equipment, it is possible to form a phosphor coating with a relatively uniform thickness on cylindrical objects such as glass tubes. When applying to the inner surface of the recessed part using methods such as applying or brushing, the phosphor suspension accumulates at the bottom of the recessed part, resulting in an uneven phosphor coating that is thicker at the bottom and thinner at the sides. There was a problem.

The present invention has been made in order to solve the above problems, and is a fluorescent lamp that can form a phosphor coating of uniform thickness on the entire inner surface of a concave portion formed in a fluorescent lamp container with good workability. The purpose is to provide a phosphor coating device.

Means for Solving the Problems The phosphor coating device for a fluorescent lamp of the present invention has an X-axis operating section and an
An XYZ orthogonal robot consisting of an axial movement part and a 2-axis movement part, an arm extending in the X-axis direction on one of the movement parts, and one or more fluorescent lights attached to the arm at required intervals. a body applicator; a transfer device disposed below the arm for arranging containers and intermittently moving the containers in one direction of the X-axis; and a transfer device disposed corresponding to the fluorescent applicator. and a plurality of phosphor suspension tanks.

Effect of the present invention With the above-described configuration, the phosphor can be automatically and continuously applied to the entire inner surface of the concave portion of a container in which the concave portion is formed, and the phosphor coating can be coated with a uniform thickness. It can be formed at any time.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the XYZ orthogonal robot R consists of an X-axis motion section 10, a Y-axis motion section 11, and a Z-axis motion section 12, and the Z-axis motion section 12 has an arm 14 in the X-axis direction. It has been extended. This arm 14 has a plurality of pairs of phosphor applicators (hereinafter referred to as applicators) la, lb,
The lc is detachably attached facing downward. In addition,
The arm 14 may extend to the X-axis operating section 10 or the Y-axis operating section 11.

The transfer device C is arranged below the arm 14 and has containers 2, 2 . . . . is intermittently transferred in one direction of the X-axis (from right to left in FIG.

Container 2, 2. . . . is supplied onto the transfer device C from the right feeding section 15 of the transfer device C, and after being coated with a phosphor suspension (hereinafter referred to as phosphor), is discharged from the discharge section 16. is discharged and transferred to a drying device (not shown) by a transfer belt 17.
sent to.

A plurality of phosphor suspension tanks (hereinafter referred to as tanks) 18
R, 18G, and 18B are applicator tools 1a and lb.

For example, the red light emitting phosphor suspension fR is placed in the tank 18R, and the red light emitting phosphor suspension fR is placed in the tank 18R.
A green-emitting phosphor suspension fG is stored in the tank 8G, and a blue-emitting phosphor suspension fB is stored in the tank 18B.

Here, the container 2 will be explained. As shown in FIG. 2, the container 2 is made of ceramic, and has a plurality of concave portions 3a, 3f, which serve as light emitting portions, formed on the negative side 2a. . In the concave portions 3a and 3b, a red light emitter fR is provided.
c and 3d have a green light emitter fG, and 3e and 3f have a blue light emitter fB'h<applicator 1a.

After applying lb and lc to form a phosphor film, electrodes etc. are attached and one side 2a is covered and sealed with a glass plate etc. to become a fluorescent lamp used as a picture element of a large color image display device. It is something. Note that the concave portion 3a...
...3f is not limited to the number and arrangement of the present embodiment.

The applicators 1a, lb, and lc are made of stainless steel that is not immersed in the organic binder, and have concave portions 3a formed in the container 2.
...3f, the holding part 1d has a shape and size that is inserted into the concave part 3a with a small gap in the 3f.
and is attached to the lever 14.

In the embodiment of the present invention, the dimensions of the concave portions 3a...3f are 3c+++ long, 11cm, and 1cm deep, and the dimensions of the applicators 1a, lb, and lc are 2.4cm long.
m.

The width is 0.7c+r and the depth Q is 7cm.

Next, containers 2, 2°... are arranged on the transfer device C.
... and the applicator tools 1a, lb, lc will be explained.

Container 2, 2. ...... is the direction shown by the arrow in Figure 2
The transfer device C is fed and aligned on the shaft. On the other hand, the applicator 1a is attached to the concave portions 3a and 3b, and the applicator 1b is attached to the concave portion 3c,
3d, the applicator IC has a concave portion 3e.

They are attached to the lever 14 in three rows corresponding to 3f. Furthermore, the distance between the applicators 1a, lb, and lc in the X-axis direction is the length e of the container 2 or an integral multiple of the jig on which the container is placed, and the distance between the rows and the distance between the applicators 1a,l
The predetermined intervals are b and lc.

To explain the operation in the above configuration, the container 2 is
5 to the transfer device C, and a plurality of them are arranged on the transfer device C with the direction of the arrow in FIG. 2 as the X axis. In this state, the arm 14 moves on the Y-axis to the left in FIG.
8R, 18G.

It is immersed in the light emitters fR, fa, and fa stored in 18B, and then returns to its original position through the reverse process.

After that, the arm 14 moves downward on the Z-axis, and the applicator 1
a, lb, and lc are arranged on the transfer device C.
．． Insert pictures into the concave portions 3a, 3b, and 3c. In this case, the applicators 1a, lb, lc are arranged in three rows and
Since they are installed at predetermined intervals in the axial direction, they are inserted at positions shifted on the X and Y axes, as shown by diagonal lines in FIG. As a result, the applicator 1a with the red light emitter fR attached
are inserted into the recessed parts 3a and 3b, the applicator 1b with the green light emitter fG attached is inserted into the recessed parts 3c and 3d, and the applicator 1c with the blue light emitter f8 attached is inserted into the recessed parts 3e and 3f, respectively. .

Subsequently, the arm 14 moves to the X-axis operating section 10. Y-axis motion part 11.
The two-axis operating unit 12 moves continuously in the XYZ directions to apply the applied Al a, 1 b, 1 c to the concave portions 3 a...
The phosphors fR and fG are brought into contact with the entire inner surface of 3f.

Apply fB to the entire inner surface of the concave portions 3a...3f.

When the application of the phosphors fR, fa, and fe to the concave portions 3a...3f is completed in this way, the transfer device C moves the container 2
Transfer one piece to the left on the X-axis from transfer device C to container 2.
One piece is discharged and transferred to a drying device by a transfer belt 17.

The XYZ orthogonal robot repeats the above operation, and as a result, light emitters f)l+ are sequentially placed in the concave portions 3a...3f.
for fB is applied automatically.

As described above, according to the phosphor coating apparatus for a fluorescent lamp of the present invention, the applicator tools la and l can be moved by the operation of the XYZ orthogonal robot.
The phosphors fR, fG, and fB are attached to the phosphors fR, fG, and fB, and the applicators 1a, lb, and lc are applied to the concave portions 3a and 3 formed in the container 2.
... 3f, move it in the XYZ directions, and touch the entire inner surface of the concave portion 3a ... 3f to remove the phosphor fR.
+ Since fG and fB are applied to the entire inner surface of the concave portions 3a...3f, a phosphor film of uniform thickness is automatically formed.
Moreover, it can be formed continuously.

As described in detail, the present invention provides an XYz orthogonal robot comprising an X-axis operating section, an X-axis operating section, and an
an arm extending in the X-axis direction on one of the operating parts; one or more phosphor applicators attached to the arm at predetermined intervals; and an arm disposed below the arm for arranging containers. and a transfer device that intermittently transfers the container in one direction of the It is possible to automatically and continuously apply the phosphor to a uniform thickness on the entire inner surface of the recessed part, which is excellent for mass production, and can be applied to any number of recessed parts of the container. In addition, it is possible to provide a versatile phosphor coating device for fluorescent lamps in which an applicator can be attached.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a luminescent material coating apparatus for a fluorescent lamp according to an embodiment of the present invention, and FIG. 2 is an external perspective view of a container and applicator of the same fluorescent lamp. 1... Fluorescent applicator, 2... Container, 3
a, 3b. 3c, 3d, 3e, 3f...Concave portion, 10...
...X-axis operating section. 11...X-axis operating section, 1
2...X-axis operation section, 14...Arm,
18R, 18G, 18B...phosphor suspension tank, R...XYZ orthogonal robot, C...
...transfer device. Name of agent: Patent attorney Shigetaka Awano 1 person 11-Y
Fibrillation external/2-4 Tsumugi am 5 part I4 A4 Transfer installation fluorescent body wall seller

Claims (1)

[Claims] XYZ consisting of an X-axis operating section, a Y-axis operating section, and a Z-axis operating section
An orthogonal robot, an arm extending in the X-axis direction on one of the operating parts, one or more phosphor applicators attached to the arm at required intervals, and a phosphor applicator disposed below the arm. , comprising a transfer device that arranges containers and intermittently transfers the containers in one direction of the X-axis, and one or more phosphor suspension tanks arranged corresponding to the phosphor applicator. A phosphor coating device for a fluorescent lamp, characterized by the following.