JP2781580B2 - Drying apparatus for panel face surface of cathode ray tube and method for producing cathode ray tube - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying apparatus for drying a panel face surface of a cathode ray tube after cleaning the panel face surface.

[Conventional technology]

In a cathode ray tube, a conductive film or the like is formed on the outer surface of the bulb.
No. 38731 is known. On the other hand, for example, in the step of forming a silica coat film on the panel face surface of a cathode ray tube, the panel face surface is washed before the silica coat film is formed, and then the moisture on the panel face surface and the reinforcing metal part is removed by air blow. Has been removed.

Heretofore, such panel face surfaces have been dried using an air gun and moving the air gun manually or by a robot to remove water little by little.

[Problems to be solved by the invention]

In the above-mentioned prior art, since an air gun is used, local drying is performed, and it takes too much time to remove moisture. In addition, automation by robots has problems such as high equipment costs, complicated movement of the air gun, and difficulty in teaching robots.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a CRT panel face surface drying apparatus which has a simple structure and can remove water in a short time.

It is another object of the present invention to provide an apparatus for drying a panel face surface of a CRT and a method for manufacturing the CRT, which can effectively remove moisture entering between the CRT and the reinforcing fitting.

[Means for solving the problem]

The above object is provided with an air knife arranged such that an air ejection port faces a panel face surface of a cathode ray tube, and up-and-down movement means for relatively moving the air knife and the panel face surface up and down so that the air knife is along the panel face surface. Achieved by a cathode ray tube.

Further, in addition to the above-described configuration, if a turning means for turning the air knife is further added, moisture can be removed more effectively.

The method for manufacturing a cathode ray tube has an elongated air ejection port,
The air knife disposed toward the panel face surface of the cathode ray tube and the panel face surface are moved up and down relatively along the panel face surface, and an air blow is blown out from the air ejection port.

[Action]

When the center axis of the cathode ray tube is horizontal and the diagonal direction of the panel face surface is horizontally arranged, only the air knife is moved up and down relatively to the panel face surface by the up and down movement means, and the panel face surface and the cathode ray tube are moved. The moisture between the metal and the reinforcing metal can be removed.

When the central axis of the cathode ray tube is horizontal and the major or minor axis direction of the panel face surface is arranged horizontally, a large amount of horizontal is accumulated in a portion between the cathode ray tube and the reinforcing bracket in a horizontal state. In this case, as described above, the air knife is not merely moved up and down relatively to the panel face surface, but the air knife and the panel face surface are positioned at a position where the air blow strikes between the horizontal cathode ray tube and the reinforcing bracket. The relative movement is temporarily stopped, and the air knife is turned by the turning means. Thereby, the angle of the air knife is swung, and the air blow hits every corner between the cathode ray tube and the reinforcing fitting, so that the water between the cathode ray tube and the reinforcing fitting is effectively blown off.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, sprockets 3, 4 are fixed to sprocket shafts 1, 2, which are arranged vertically and rotatably, and a chain 5 is wound around the sprockets 3, 4. Have been. Sprocket shaft 2
A sprocket 6 is fixed to the sprocket 6, and a chain 9 is wound around the sprocket 6 and a sprocket 8 fixed to an output shaft of a lifting / lowering motor 7.

An X-axis table 10 movable in the X direction (a direction perpendicular to the paper surface) is fixed to the chain 5, and one end of a roller shaft 11 is fixed to the X-axis table 10. A roller 12 is rotatably supported on the roller shaft 11, and the roller 12 is inserted into a groove 13 a of the cam plate 13. The groove 13a of the cam plate 13 is formed to be curved downward from above as shown in FIG.

The other end of the roller shaft 11 is fixed to a vertical moving plate 14, to which a bearing 15 and an angle changing motor 16 are fixed. A knife support shaft 17 is rotatably supported by the bearing 15, and one end of the knife support shaft 17 is fixed to an output shaft of the angle changing motor 16 via a coupling 18. At the other end of the knife support shaft 17, an air knife 19 having a horizontally elongated air ejection port 19a is fixed. The air knife 19 has an air chamber 19b therein as shown in FIG.
communicates with a. Accordingly, when air is supplied from the air supply means (not shown) to the air chamber 19b, the elongated air ejection port 19
The air blow 20 blown out from a (see FIG. 4) has a curtain shape.

Next, the operation will be described. CRT 21 after cleaning
Is the central axis 21a of the cathode ray tube 21 and the panel face 1
2b is horizontal and the panel face 21b is air knife 19
Is held by the holding means (not shown). A reinforcing fitting 23 to which a mounting lug 22 is attached is wound around the cathode ray tube 21.

Then, the air blow 20 is started from the state where the air knife 19 is at the position A in FIG. 4, and the elevating motor 7 is started. The rotation of the lifting motor 7 is transmitted to the X-axis table 10 via the sprocket 8, the chain 9, the sprockets 6, 4, and the chain 5, and the X-axis table 10 is lowered. As a result, the roller 12 descends while being guided by the groove 13a of the cam plate 13, so that the air knife 19 is moved to the positions A, B, C, D, via the vertical moving plate 14, the bearing 15 and the knife support shaft 17.
It descends on the locus of E.

By the way, in the case of the present embodiment, the cathode ray tube 21 is disposed so that the major axis direction of the panel face surface 21b is horizontal, so that the horizontal portions 24, 25 between the cathode ray tube 21 and the reinforcing bracket 23 are provided. There is a lot of water. Therefore, in the movement locus of the air knife 19, the rotation of the elevating motor 7 is temporarily stopped at the position B of the air knife 19 where the air blow 20 hits the horizontal portion 24. Then, the angle changing motor 16
Is rotated back and forth. Thereby, the knife support shaft 17 reciprocates, swings the angle of the air knife 19 so as to be in the air blow direction from the position B, and then returns to the position B. Thereafter, when the lifting motor 7 is started again, the air knife 19 moves to the positions B, C, D and E. Then, at the position E, in order to remove the moisture from the horizontal portion 25, the angle between the positions E, E ', E and the air knife 19 is changed as in the case of removing the moisture from the horizontal portion 24.

As described above, when the angle of the air knife 19 is swung in the water portions 24 and 25, the air blow 20 hits every corner between the cathode ray tube 1 and the reinforcement fitting 23, so that the cathode ray tube 1 and the reinforcement fitting
Moisture during the 23 is effectively blown off.

In the above embodiment, the panel face 21b
Although the case where the major axis direction is arranged horizontally has been described,
The minor axis direction may be arranged horizontally. However, when the major axis direction is arranged horizontally, the amount of movement of the air knife 19 can be reduced, so that the time can be reduced. Further, the diagonal direction of the panel face 21b may be arranged horizontally. In this case, since the space between the cathode ray tube 21 and the reinforcing bracket 23 is inclined and the water easily flows downward, the air knife 19 may be merely an operation of lowering.

5 and 6 show another embodiment of the present invention. The air knife 19 is fixed to the tip of an arm 31 rotatably supported by a spindle 30 disposed above the central axis 21 of the cathode ray tube 21. An operating rod of an air cylinder 32 is connected to the arm 31. Therefore, when the air cylinder 32 is actuated, the air cylinder 19 gradually raises the angle and descends while approaching the panel face surface 21b, thereby removing the moisture between the panel face surface 21b and the cathode ray tube 21 and the reinforcing bracket 23 at a stretch. I do.

In the above embodiments, the case where the air knife 19 is moved up and down has been described.However, the panel face surface 21b of the cathode ray tube 21 may be moved up and down, or both the air knife 19 and the panel face surface 21b are moved up and down. You may.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, since it has the very simple structure which provided the air knife and the up-and-down movement means which makes this air knife move up and down relatively with respect to a panel face, equipment cost can be reduced sharply. In addition, since water can be removed at once by simply moving the air knife up and down relative to the panel face, work can be performed in a short time.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a front view of a cam plate, FIG. 3 is an enlarged sectional view of an air knife, FIG. FIG. 6 is a side view showing another embodiment of the present invention, and FIG. 6 is a front view showing the relationship between the cathode ray tube and the air knife in FIG. 3, 4 sprocket, 5 chain, 6 sprocket, 7 lifting motor, 8 sprocket, 9 chain, 10 X-axis table, 12 rollers, 13 cam Plate, 13a Groove, 14 Vertical movement plate, 15 Bearing, 16 Angle changing motor, 17 Knife support shaft, 19 Air knife, 19a Air outlet, 21 CRT , 21b: Panel face, 31: Lever, 32: Air cylinder.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) H01J 9/20 H01J 9/38 H01J 29/88

Claims (3)

(57) [Claims] An air knife disposed so that an air ejection port faces a panel face surface of a cathode ray tube; and a vertical movement means for relatively moving the air knife and the panel face surface up and down so that the air knife follows the panel face surface. A panel face surface dryer for CRTs equipped with 2. An air knife having an air ejection port directed toward a panel face surface of a cathode ray tube, and up-down moving means for relatively moving the air knife and the panel face surface up and down so that the air knife follows the panel face surface. And a rotating means for rotating the air knife. 3. An air jet having an elongated air ejection port, wherein an air knife disposed toward a panel face surface of a cathode ray tube and the panel face surface are moved up and down relatively along the panel face surface, and A method for manufacturing a cathode ray tube, comprising blowing air blow from an outlet.