JP2885875B2 - Phosphor coating device for fluorescent lamps - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phosphor coating apparatus for a fluorescent lamp, and more particularly, to apply a phosphor to a uniform thickness on the entire inner surface of a concave portion of a container having a concave portion. And a coating device.

2. Description of the Related Art Conventionally, a device for applying a phosphor suspension to an application surface is, for example, holding a glass tube vertically, and flowing down the phosphor suspension using a nozzle from an upper end opening of the glass tube to form a glass. The phosphor was applied to the inner surface of the tube to a uniform thickness. Although such a device has already been automated, there is no known automatic device for uniformly applying the phosphor suspension to the entire inner surface of the box-shaped concave portion. Or it was performed by a method such as brushing.

Problems to be Solved by the Invention In such a conventional phosphor coating apparatus, a phosphor film having a relatively uniform thickness can be formed on a cylindrical one such as a glass tube. When applying to the inner surface of the concave portion by applying, brushing, etc., the phosphor suspension accumulates on the bottom portion of the concave portion, so that a non-uniform phosphor film having a thick bottom portion and a thin side portion is called. There was a problem.

The present invention has been made to solve the above problems,
It is an object of the present invention to provide a fluorescent lamp phosphor coating apparatus capable of forming a fluorescent film having a uniform thickness on the entire inner surface of a concave portion formed in a fluorescent lamp container with good workability.

Means for Solving the Problems A phosphor coating apparatus for a fluorescent lamp according to the present invention includes an XYZ orthogonal type robot including an X-axis operation unit, a Y-axis operation unit, and a Z-axis operation unit. An arm extending in the direction, one or more phosphor applicators mounted on the arm at required intervals, and arranged below the arm, arranged in a container, and intermittently moving the container in the X-axis direction. A transfer device that moves in one direction, and a transfer device that corresponds to the phosphor applicator.
Or it is provided with a plurality of phosphor suspension tanks.

Effect of the Invention According to the above configuration, the phosphor can be automatically and continuously applied to the entire inner surface of the concave portion of the container in which the concave portion is formed, and the phosphor film has a uniform thickness. Can be formed.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the XYZ orthogonal robot R includes an X-axis operation unit 10, a Y-axis operation unit 11, and a Z-axis operation unit 12. The Z-axis operation unit 12 has an arm 14 extending in the X-axis direction. Has been established. A plurality of pairs of phosphor applicators (hereinafter, referred to as applicators) 1a, 1b, 1c are detachably attached to the arm 14 at predetermined intervals downward. Note that the arm 14 is connected to the X-axis operation unit 10.
Alternatively, it may be extended to the Y-axis operation unit 11.

The transfer device C is disposed below the arm 14, and transfers the arranged containers 2, 2,... Described later intermittently in one direction of the X-axis (from right to left in FIG. 1). The containers 2, 2,... Are supplied onto the transfer device C from an inlet 15 on the right side of the transfer device C, and after a phosphor suspension (hereinafter, referred to as a phosphor) is applied, a discharge unit 16 is provided. And is sent by a transfer belt 17 to a drying device (not shown).

Multiple phosphor suspension tanks (hereinafter referred to as tanks) 18
R, 18G, 18B is applicator 1a, 1b, are arranged in an appropriate position to positionally correspond to 1c, for example, the tank 18R red emitting phosphor suspension f _R is a green-emitting phosphor to the tank 18G The suspension f _G is
Are reservoir respectively blue-emitting phosphor suspension f _B in the tank 18B.

Here, the container 2 will be described. As shown in FIG. 2, the container 2 is formed of ceramic, and has a plurality of concave portions 3a to 3f serving as light emitting portions on one surface 2a. And the red luminous body f _R is provided on the concave portions 3a and 3b, and the green luminous body f _G is provided on 3c and 3d.
Sealing but, 3e, the 3f blue emitters f _B are respectively applied by applicator 1a, 1b, 1c, after the formation of the phosphor coating, the first surface 2a by mounting an electrode or the like covered with a glass plate or the like The fluorescent lamp is used for a picture element of a large-sized color image display device. The number and arrangement of the concave portions 3a to 3f are not limited to the present embodiment.

The applicators 1a, 1b, 1c are made of stainless steel that is not immersed in an organic binder, and are inserted into the concave portions 3a,... 3f with a small gap, following the concave portions 3a,. It is mounted on the lever 14 with the holding portion 1d in the shape and size to be performed. Each of the concave portions 3a to 3f in the embodiment of the present invention has a length of 3 cm and a width of 3 cm.
1 cm, depth 1 cm, and the dimensions of the applicators 1a, 1b, 1c are:
It is 2.4cm long, 0.7cm wide and 0.7cm deep.

Next, the positional relationship between the containers 2, 2,... Arranged on the transfer device C and the applicators 1a, 1b, 1c will be described.

The containers 2, 2,... Are supplied to the transfer device C in the direction indicated by the arrow in FIG. On the other hand, the applicator 1a has a concave
3a, 3b, applicator 1b is concave section 3c, 3d, applicator 1c is concave section
The levers 14 are mounted in three rows corresponding to 3e and 3f. The distance between the applicators 1a, 1b, and 1c in the X-axis direction is
The length is 1 or an integer multiple of the jig on which the container is placed, and the intervals between the rows and the mutual intervals are predetermined intervals between the applicators 1a, 1b, and 1c.

The operation of the above configuration will be described.
15 to the transfer device C, and a plurality of the transfer devices are arranged on the transfer device C with the direction of the arrow in FIG. In this state, the arm 14 moves on the Y axis to the left in FIG. 1 and then moves downward on the Z axis, and moves the applicators 1a, 1b, 1c to the tanks 18R, 18G, 18B.
Immersed in the luminous bodies f _R , f _G , f _B stored in, and then return to the original position through the reverse process. Thereafter, the arm 14 moves downward on the Z-axis, and the applicators 1a, 1b, 1c are fully inserted into the concave portions 3a, 3b, 3c of the containers 2, 2,... Arranged on the transfer device C. I do. In this case, since the applicators 1a, 1b, and 1c are mounted in three rows and at a predetermined interval in the X-axis direction, they are inserted into portions shifted on the X and Y axes as shown by hatching in FIG. Is done. Accordingly, the applicator 1a is concave portion 3a red emitters f _R are attached, 3b
, The applicator 1b of green luminous body f _G is attached is concave portion 3c, 3d
, The applicator 1c the blue emitter f _B attached is inserted respectively concave portion 3e, to 3f.

Subsequently, the arm 14 is continuously moved in the XYZ directions by the X-axis operation unit 10, the Y-axis operation unit 11, and the Z-axis operation unit 12, and the applicators 1a, 1b, 1c
Are brought into contact with all the inner surfaces of the concave portions 3a... 3f so that the phosphors f _R , f _G , f _B
Is applied to all the inner surfaces of the concave portions 3a... 3f.

Phosphor f _R of the thus the concave portion 3a ...... 3f, f _G, After completion the application of f _B, the transfer device C is transferred to the left on one component X-axis of the vessel 2 transport One container 2 is discharged from the device C, and is transferred to the drying device by the transfer belt 17.

The XYZ orthogonal robot repeats the above operation, whereby the light emitting elements f _R , f _G , f _B are automatically applied to the concave portions 3a... 3f in sequence.

As described above, according to the phosphor applying apparatus of the fluorescent lamp of the present invention, the applicator 1a, 1b, 1c is operated by the operation of the XYZ orthogonal type robot.
The phosphors f _R , f _G , f _B are adhered to the
.. 3f, and is moved in the XYZ directions to contact the entire inner surface of the concave portions 3a... 3f so that the phosphors f _R , f _G ,
Since applying f _B to all the inner surface of the concave portion 3a ...... 3f, automatically a phosphor coating having a uniform thickness, and in which can be continuously formed.

Effect of the Invention As described above, according to the present invention, the X-axis operation unit and the Y-axis
An XYZ orthogonal type robot comprising an axis operation unit and a Z axis operation unit, an arm extending in one of the operation units in the X axis direction, and one or a plurality of fluorescent lights attached to the arm at predetermined intervals A body applicator, a transfer device that is arranged below the arm, arranges containers, and intermittently conveys the containers in one direction of the X-axis;
Or because it has multiple phosphor suspension tanks,
The phosphor can be automatically and continuously applied to a uniform thickness on the entire inner surface of the concave portion formed in the container, which is excellent in mass productivity and the number of concave portions of the container. It is possible to provide a versatile phosphor coating device for a fluorescent lamp, in which a coating tool can be mounted in accordance with the degree of variation.

[Brief description of the drawings]

FIG. 1 is a perspective view of a luminous body coating device for a fluorescent lamp according to one embodiment of the present invention, and FIG. 2 is an external perspective view of a container and a coating tool of the fluorescent lamp. 1 ... phosphor applicator, 2 ... container, 3a, 3b, 3c, 3d, 3e, 3f
… Recessed part, 10… X-axis operation part. 11 ... Y axis operation part, 12
... Z-axis operation unit, 14 arm, 18R, 18G, 18B phosphor suspension tank, R XYZ orthogonal robot, C transfer device.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Rikio Kasuya 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Denshi Kogyo Co., Ltd. In-house (56) References JP-A-62-188124 (JP, A) JP-A-1-217829 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01J 9/22

Claims (1)

(57) [Claims] 1. An XYZ orthogonal type robot comprising an X-axis operation unit, a Y-axis operation unit and a Z-axis operation unit, an arm extending in one of the operation units in the X-axis direction, and an arm required for the arm. One or more phosphor applicators mounted at intervals of: a transfer device arranged below the arm, arranged in a container, and intermittently transferring the container in one direction of the X-axis; A phosphor application device for a fluorescent lamp, comprising: one or a plurality of phosphor suspension tanks arranged corresponding to an applicator.