JPH06260088A - Fluorescent lamp aperture manufacturing equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] Having a film peeling member having a magnetic material and a magnet arranged to face the film peeling member, the film peeling member is pressed against the fluorescent film on the inner wall of the straight tube type glass tube. In an aperture manufacturing apparatus for a fluorescent lamp, in which a part of the fluorescent film is peeled off by relatively moving in the axial direction of the glass tube, the peeling of the fluorescent film is stably and reliably carried out to the final end of the glass tube. [Structure] The glass tube axis of the manufacturing apparatus is arranged in the vertical direction.
Alternatively, it is provided with a fluorescent powder suction pump. Alternatively, the magnet is fixed to a support table for supporting the movable glass tube. Alternatively, in the peeling member, the film peeling portion and the magnetic body portion are separately arranged. [Effect] A manufacturing device that enables reliable and stable peeling of the fluorescent film up to the final end of the glass tube, and the aperture of the fluorescent lamp is stable and highly accurate, while conserving glass tube resources. Can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aperture fluorescent lamp which is generally used as a display element such as a large color display device or an electronic bulletin board, or a light source for illuminating an original document of an office automation equipment such as a facsimile or a copier. Device for manufacturing a light output unit of the above.

[0002]

2. Description of the Related Art Aperture fluorescent lamps, which are generally used as display elements such as large color display devices and electronic bulletin boards, or as light sources for illuminating documents in office automation equipment such as facsimiles and copiers, use finer display pixels. Or
As the OA equipment becomes smaller and lighter, the diameter of the OA equipment becomes smaller and smaller, and recently, there is a tendency that the demand for an elongated product having a tube diameter of 4 to 8 mm and a tube length of about 400 mm increases. For forming the fluorescent film on the inner surface of the glass tube in such an aperture fluorescent lamp, a partial peeling method is generally used as shown in Japanese Patent Application No. 4-138640. The fluorescent film forming method by the partial peeling method will be described with reference to the drawings.

First, a phosphor suspension is applied to the entire inner surface of a straight tube type glass tube by coating, and this is dried and baked to form a phosphor film. Next, the fluorescent film is peeled off using the manufacturing apparatus according to FIG. In this manufacturing apparatus, a film peeling member 3 arranged to face the magnet 4 is inserted into the glass tube 1, and the film peeling member 3 and the magnet 4 are reciprocally moved in the axial direction of the glass tube, thereby being fixed horizontally. The fluorescent film 2 formed on the entire inner surface of the glass tube 1 is partially peeled in the axial direction of the glass tube.

The glass tube 1 is detachably supported by a glass tube supporting portion 5. The glass tube supporting portion 5 is, for example, shown in FIG.
As shown in (b), it is composed of a pair of chucks 6a and 6b for sandwiching the end portion of the glass tube 1 and a chuck opening / closing drive unit 7. The opening / closing drive unit 7 causes the chucks 6a and 6b to be in an open state (chuck 6a, 6b is indicated by a broken line Lo) or
It is driven to the closed state (the chucks 6a and 6b are indicated by the broken line Lc). When the chuck is in the open state, the glass tube 1 is supplied, and after the chuck is closed, the glass tube 1 is clamped.

The film peeling member 3 is fixed to the tip of the peeling bar 8 by projecting in the orthogonal direction, and the magnet 4 is fixed to the tip of a magnet holder 9 arranged in parallel with the peeling bar 8.
The film peeling member 3 is an elastic component such as rubber or epoxy resin. As shown in FIG. 6C, the tip end surface of the film peeling member 3 is formed into a curved surface along a part of the inner peripheral surface of the glass tube 1. .
At least the tip of the peeling bar 8 to which the film peeling member 3 is fixed is made of a magnetic material, and the tip of this magnetic material is magnetically attracted by a magnet, so that the film peeling member 3 of a non-magnetic material is removed.
Are indirectly attracted to the magnet 4. When the glass tube 1 is not inserted into the film peeling member 3 and the magnet 4 that are always facing each other, as shown in FIG. 6C, the two are in contact with each other by the magnetic attraction force of the magnet 4. Further, the film peeling member 3 has a taper surface m before and after the front end portion and a taper portion n at the front end portion of the magnetic holder 9. The taper surfaces mn of the film peeling member 3 and the magnet 4 facing each other face the tube end of the glass tube 1, and when both the film peeling member 3 and the magnet 4 are inserted into the glass tube 1, the tube of the glass tube 1 Guide against the edge to ensure a smooth insertion.

The peeling rod 8 and the magnet holder 9 are the glass tube 1
Is longer than the pipe length, and the rear ends of both are fixed to the operating box 10. The operation box 10 incorporates a drive source such as a motor, is supported by a guide rod 11 parallel to the glass tube axial direction, and reciprocates in the glass tube axial direction with a predetermined stroke.

Next, the fluorescent partial peeling operation of the glass tube 1 by the above manufacturing apparatus will be described. The glass tube 1 is horizontally supported by the glass tube supporting portion 5, one end of the glass tube 1 is made to face the peeling bar 8 and the tip of the magnet holder 9, and the operating box 10 is moved toward the glass tube 1. . Then, as shown in FIG. 7, the taper surface m on the tip side of the film peeling member 3 is formed.
The tapered surface n of the magnet 4 contacts the tube end of the glass tube 1, the film peeling member 3 is guided to the inner surface side of the glass tube 1, the magnet 4 is guided to the outer surface side of the glass tube 1, and the peeling bar 8 and the magnet holder are further guided. 9 is moved forward, the film peeling member 3 is moved to the glass tube 1
The magnet 4 contacts the outer peripheral surface of the glass tube 1, and both of them move in the axial direction of the glass tube 1 with the tube wall of the glass tube 1 sandwiched therebetween. The magnet 4 magnetically attracts the tip of the peeling bar 8 to move the film peeling member 3 and the magnet 4 in the axial direction of the glass tube, and as shown in FIG. The film 2 is peeled off in the axial direction of the glass tube with the width of the tip of the film peeling member 3.

The peeling of the fluorescent film by advancing the peeling rod 8 and the magnet holder 9 is carried out until the tips of the peeling rod 8 and the magnet holder 9 project from the glass tube 1 as shown by the hatched lines in FIG. 7 (a). Next, the peeling bar 8 and the magnet holder 9 are retracted. Then, the film peeling member 3 is again formed on the inner and outer surfaces of the glass tube 1.
The magnet 4 comes into contact with the magnet 4 and moves backward, and during this movement, the remaining portion of the fluorescent film 2 is peeled off at the portion where the film peeling member 3 was peeled earlier.

[0009]

According to the above-mentioned fluorescent film peeling method, the fluorescent film is peeled off without damaging the inner surface of the glass tube. However, when the peeled phosphor powder adheres to or detaches from the film peeling member 3 in the width direction (hereinafter, referred to as width) or the thickness direction (hereinafter, referred to as thickness) with respect to the glass tube axial direction. The width or thickness increases or decreases, and then returns to the original state, and the width or thickness becomes unstable. The width of the peeling portion is changed by changing the width of the film peeling member 3. Further, since the thickness of the film peeling member 3 is changed, the magnetic attraction force between the magnet 4 and the film peeling member 3 and the hardness of the contact surface between the film peeling member 3 and the glass tube 1 are changed. Furthermore, when the phosphor powder adheres in a large amount, there is a problem that the phosphor powder is clogged in the glass tube 1.

Further, even if the phosphor powder does not fluctuate the width of the peeling portion or the glass tube 1 is clogged, it is necessary to finally remove the unnecessary phosphor powder. Therefore, the aperture forming apparatus needs to have a means for collecting the phosphor powder at one end of the glass tube 1. For example, when a rubber tube or the like is attached to the glass tube 1 to collect the phosphor powder by using the conventional aperture forming device as shown in FIG. 6, the attached object such as the rubber tube or the like hits the magnet 4, so that the glass end There is a problem that the phosphor film cannot be peeled off to all the parts.

[0011]

In the step of peeling the fluorescent film on the inner wall of the glass tube according to the aperture type fluorescent lamp of the present invention, the fluorescent substance powder is removed by any one or more of the following means, The glass tube will not be clogged, and the width and thickness of the peeled portion of the fluorescent film will be stabilized.

1) The glass tube axis is arranged vertically and the fluorescent powder is allowed to fall naturally.

2) The fluorescent powder is removed by suction with a pump.

3) A magnet is fixed to the support to enhance the attractive force of this magnet.

When a rubber tube or the like is attached to the glass tube to collect the fluorescent powder, the fluorescent film is peeled off to the final end of the glass tube to remove the fluorescent powder, and the fluorescent powder is transferred to the glass tube. In order to stabilize the width and thickness of the peeling part of the fluorescent film without clogging, the film peeling part of the film peeling member and the magnetic material part are separately arranged, and the film peeling part is set to the end position of the film peeling bar. .

[0016]

The fluorescent powder does not clog the glass tube and the width and thickness of the peeled portion of the fluorescent film are stabilized, so that the fluorescent lamp has a uniform brightness and a uniform brightness. Alternatively, in the peeling manufacturing process of the fluorescent film, by strengthening the attractive force between the film peeling portion and the external magnet, due to insufficient peeling, there is no need for re-peeling, and the re-peeling work step is unnecessary, and You can prevent mistakes due to the re-peeling work process.
Alternatively, it is possible to omit the fluorescent powder removing operation of the film peeling member after the peeling manufacturing process is completed.

Further, a pump for sucking the gas inside the glass tube and sucking and removing the peeled fluorescent powder is provided, and the film peeling portion of the film peeling member (hereinafter referred to as a brush) and the magnetic material portion are separately arranged. Then, by setting the brush at the extreme end position of the film peeling bar, it is possible to collect and remove all unnecessary phosphor powder and form an aperture to the final end of the glass tube.

[0018]

【Example】

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. The same members as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted. FIG. 1 is a diagram for explaining an apparatus for manufacturing an aperture of a fluorescent lamp according to the present invention. The manufacturing apparatus shown in FIG.
The glass tube shaft is vertically arranged by connecting the glass tube 1 to the rubber hose 15 at the connecting portion 13, one end of the glass tube 1 is fixed by the chuck 6, and the other end is chucked by the chuck 6.
Fix with the chuck 26 having a larger diameter. The peeling bar 8 and the magnet holder 9 are longer than the tube length of the glass tube 1, and the rear ends of both are fixed to the drive box 10 and are supported by a guide rod 11 parallel to the glass tube axis direction so as to have a predetermined length in the glass tube axis direction. Moves back and forth with a stroke. The film peeling member 3 at the tip of the film peeling rod 8 and the end of the magnet 4 are more rounded than the taper shape so that the glass tube is not easily scratched.

Next, the fluorescent partial peeling operation of the glass tube 1 by the above manufacturing apparatus will be described. The operation box 10 is moved from the upper side to the lower side in the axial direction of the glass tube to remove the film peeling member 3
The magnet 4 to the inner surface side of the glass tube 1 and the magnet 4 to the outer surface side of the glass tube 1, and when the film peeling rod 8 and the magnet 9 are further advanced, the film peeling member 3 contacts the fluorescent film 2 of the glass tube 1. Then, the magnet 4 comes into contact with the outer peripheral surface of the glass tube 1, and the magnet 4 magnetically attracts the film peeling member 3, and both of them move downward with the wall of the glass tube 1 interposed therebetween. At this time, the portion of the fluorescent film 2 that comes into contact with the film peeling member 3 is peeled off in order from the top to the bottom with the width of the tip of the film peeling member 3. The peeled fluorescent film sequentially becomes fluorescent powder, and the fluorescent powder passes from the glass tube 1 through the connecting portion 13 to the fluorescent powder receiver 17 by gravity and is deposited in the fluorescent powder receiver 17. In this way, the fluorescent powder hardly adheres to or clogging the glass tube and does not adhere to the film peeling member 3.

FIG. 2 shows a detailed view of the connecting portion 13. As described above, the fluorescent powder needs to easily fall naturally from the glass tube 1 through the connecting portion 13 to the fluorescent powder receiver 17. The diameter of the connecting portion 13 is set so that the fluorescent powder easily falls from the glass tube 1 to the fluorescent powder receiver 17 by itself.
It is larger than the diameter of. Further, the time for attaching and detaching the glass tube 1 from the connecting portion 13 is shortest, and it is necessary to use a shape and a material that can be easily fixed by the chuck 26.

Embodiment 2 FIG. 3 is a diagram for explaining a method of sucking and removing fluorescent powder with a pump. The glass tube 1 and the rubber hose 15 are connected by a connecting portion 13, and the rubber tube 15 is connected to a pump 16. The rubber tube 15 has a trap portion 14, and the trap portion 14 is composed of a dust filter or the like. The purpose is to capture the fluorescent powder and prevent the fluorescent powder from being sucked by the pump 16.

Similar to the conventional example, the fluorescent film is peeled from the glass tube 1, and the peeled fluorescent film becomes fluorescent powder in sequence, and the fluorescent powder of the glass tube 1 passes through the rubber hose 15 from the connecting portion 13 and is captured by the trap 14. To be done. The gas in the trap 14 further passes through the rubber hose 25 and is exhausted by the pump 16. In this way, the fluorescent powder hardly adheres to or clogging the glass tube and does not adhere to the film peeling member 3.

FIG. 2 shows a detailed view of the connecting portion 13. As described above, the fluorescent powder needs to pass through the connecting portion 13 from the glass tube 1 and be easily captured by the trap 14. The diameter of the connecting portion 13 is made larger than that of the glass tube 1 so that the fluorescent powder can easily reach the trap 14 from the glass tube 1. In addition, the time for attaching and detaching the glass tube 1 from the connecting portion 13 is shortest, and the shape that can be easily fixed by the chuck 26
Must be made of material. Further, the connection portion between the insertion port 21 and the rubber hose 15, the connection portion between the rubber hose 15 and the lid 22, and the connection portion between the lid 22 and the rubber hose 25 have a minimum gap to prevent leakage.

Embodiment 3 FIG. 4 is a view for explaining an embodiment in which a magnet is fixed to a support, a glass tube is arranged on the magnet, and the glass tube moves on the magnet. In the figure, the magnet 12 on the support base 20 is large and stationary, and the attraction force with the film peeling member 3 facing the magnet 12 is increased to increase the magnet 1.
2 The glass tube 1 is arranged above, and the lower surface of the inner wall of the glass tube 1 is peeled off by the film peeling member 3. Since the magnet 12 is of a stationary type, a magnet holder is unnecessary, vibration, tilt, and twist can be extremely reduced, and since it is not necessary to consider the mechanical strength of the magnet holder, a large magnet can be used. However, the magnetic force can be strengthened. From the above, it is possible to stabilize and increase the attraction force between the magnet 12 and the film peeling member 3, and also to stabilize and increase the mechanical strength. Here, since one end of the glass tube 1 is also supported by the magnet 12, the glass tube supporting portion 5 including the chuck 6 becomes unnecessary.

The method of peeling the fluorescent film 2 and the method of removing the fluorescent powder are the same as in the second embodiment.

Embodiment 4 FIG. 5 is for explaining an embodiment in which a magnetic material portion of a film peeling member and a film peeling portion (hereinafter referred to as a brush) are separately arranged, and the brush is arranged at the end of the film peeling bar. FIG. Although not necessary in the case of the first embodiment,
In the case of a device in which a pump is connected to one end of a glass tube as in a few cases, one end of the lamp is inevitably fixed by something like a connecting portion 13. At that time, when the brush 3 and the magnet 4 or the magnet 12 are arranged opposite to each other as shown in FIGS. 3 and 4, since the connecting portion 13 of the glass tube 1 and the magnet 4 are in contact with each other, the end portion is farther from the connecting portion 13. Since the brush 3 does not reach the final end of the glass tube 1, the fluorescent substance at the final end of the glass tube 1 cannot be peeled off. However, FIG.
In the above, the peeling bar 8 has a magnetic body 18 to be placed opposite to the magnet 4 and a brush 19 at the tip of the peeling bar 8 separately. When the fluorescent film 2 at the final end of the glass tube 1 is peeled off using the peeling bar 8 in which the film peeling portion and the magnetic material portion of the film peeling member are separately arranged, the magnet 4 and the connecting portion 13 are in contact with each other. Before, the brush 19 can reach the end. Therefore, the final end of the glass tube 1 can also be used for the aperture type fluorescent lamp.

[0027]

EFFECTS OF THE INVENTION By arranging the glass tube axis of the manufacturing apparatus in the vertical direction and allowing the fluorescent powder to fall naturally or to be removed by suction with a pump, the fluorescent powder may adhere to or be clogged with the glass tube, or the film peeling member It hardly adheres.

By making the magnet stationary, it is possible to stabilize and increase the attraction force between the magnet and the film peeling member, and also to stabilize and increase the mechanical strength.

By arranging the brush at the extreme end position of the film peeling bar, the brush can reach the closing end, so that the final end of the glass tube 1 can also be used as an aperture.

When a rubber tube or the like is attached to the glass tube to collect the phosphor powder, the brush can reach the final end by setting the brush at the extreme end position of the film peeling bar. The final end of the glass tube can also be used as the aperture.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an embodiment of a discharge lamp aperture manufacturing apparatus according to the present invention. In particular, it is a diagram illustrating the manufacturing apparatus of the first embodiment.

FIG. 2 is an enlarged view of a connecting portion 13 of FIG.

FIG. 3 is a diagram illustrating a manufacturing apparatus according to a second embodiment of the present invention.

FIG. 4 is a diagram illustrating a manufacturing apparatus according to a third embodiment of the present invention.

FIG. 5 is a diagram illustrating a manufacturing apparatus according to a fourth embodiment of the present invention.

FIG. 6 is a diagram illustrating an aperture manufacturing apparatus for a discharge lamp.

7 is an enlarged view of the brush 3 and the magnet 4 portion of FIG.

[Explanation of Codes] 1 glass tube 2 fluorescent film 3 brush 4 magnet 5 glass tube support 6, 26 chuck 7 chuck open / close drive 8 peeling bar 9 magnet holder 10 operating box 11 guide rod 12 stationary magnet 13 connection 14 trap Parts 15 and 25 Rubber hose 16 Pump 17 Fluorescent powder receiver 18 Magnetic material 19 Brush 20 Support stand 21 Insertion port 22 Lid

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichiro Hoshizaki 2-14-40 Ofuna, Kamakura-shi, Kanagawa Mitsubishi Electric Corporation

Claims (4)

[Claims] 1. A glass tube shaft comprising: a film peeling member having a magnetic material; and a magnet arranged to face the film peeling member, the film peeling member being pressed against the fluorescent film on the inner wall of the straight tube type glass tube. Aperture manufacturing apparatus for a fluorescent lamp, wherein a glass tube axis is arranged in a vertical direction in an apparatus for manufacturing an aperture of a fluorescent lamp, which is relatively moved in a direction to peel off a part of a fluorescent film. 2. A glass tube shaft comprising: a film peeling member having a magnetic material; and a magnet arranged to face the film peeling member. The film peeling member is brought into pressure contact with the fluorescent film on the inner wall of the straight tube type glass tube to form a glass tube shaft. In an aperture manufacturing apparatus for a fluorescent lamp that relatively moves in a direction to peel off a part of the fluorescent film, a pump for sucking and removing the fluorescent powder of the peeled fluorescent film by sucking the gas inside the glass tube is provided. An apparatus for manufacturing the aperture of a fluorescent lamp. 3. A glass tube shaft comprising: a film peeling member having a magnetic material; and a magnet arranged to face the film peeling member. The film peeling member is brought into pressure contact with the fluorescent film on the inner wall of the straight tube type glass tube. In a device for manufacturing an aperture of a fluorescent lamp, in which a part of a fluorescent film is peeled by moving the magnet relative to each other in a direction, the magnet is fixed to a support stand for supporting the movable glass tube. Lamp aperture manufacturing equipment. 4. A glass tube shaft comprising: a film peeling member having a magnetic material; and a magnet arranged to face the film peeling member, the film peeling member being pressed against the fluorescent film on the inner wall of the straight tube type glass tube. In a device for manufacturing an aperture of a fluorescent lamp, which is relatively moved in a direction to peel off a part of the fluorescent film, a pump for sucking and removing the peeled fluorescent powder by sucking the gas inside the glass tube is provided, and the film An apparatus for manufacturing an aperture of a fluorescent lamp, wherein a film peeling portion of a peeling member and a magnetic material portion are separately arranged.