JPS60172133A - Manufacture of discharge lamp - Google Patents

Abstract

PURPOSE:To promote the rationalization of production by coating and drying glass frit on the planned places on the surface of an end plate where a bulb and a stem are to be fixed and by fusing and hardening the glass frit at each place after placing a corresponding stem and bulb. CONSTITUTION:In concave grooves 22, 23 on the upper surface 25 of an end plate 2, a glass frit 5 is coated, which is inserted in a tunnel drying oven A to dry a vehicle in the glass frit 5. Next, after an exhaust pipe 6 is inserted into an exhaust pipe insertion hole 26 of one concave groove 23 of the end plate 2, a pellet 55 is fitted on through a tip 66 of the exhaust pipe 6. Then, in the other concave groove 22 of the end plate 2, a stem 4 is placed with a lead wire 33 and a small glass tube 34 inserted in a lead wire insertion hole 24. After this, each bottom 12, 13 of a bulb 1 is placed in each concave groove 22, 23 and then inserted into a tunnel fixing oven C to heat-melt the glass frit 5 and the pellet 55 of the glass frit 5; thus a series of fixing operations are completed.

Description

[Detailed Description of the Invention] [Substance of the Invention!l'f] This invention relates to the manufacture of a discharge rung formed by fixing the bottom of pulp with an end plate via an adhesive (hereinafter referred to as glass frit). % relates to a fixing method using glass frit.

[Prior art]

In recent years, in the field of discharge lamps, especially fluorescent lamps,
A number of proposals have been made for compact fluorescent rungs aimed at making the shape more compact. FIG. 1 shows an example.

In the figure, (II is two U-shaped glass tubes Qll
a glass bulb formed by interconnecting four IlI11;
(2) is the open bottom 113f of this pulp tll.
l: Ceramic end plate that closes I, (4) is electrode 1
31 Purple-sealed glass stems (4) are placed inside one end of the glass tube 11υ. +61 is a glass exhaust pipe. Also, u41 is a communication part of pulp fi+, (9) is a typical fluorescent lamp with pulp (1) and stem (4).

Because the end plate (2) and the exhaust pipe (6) # are arranged and configured in a compact manner, it is extremely difficult to heat these parts and directly seal them together, so they are generally sealed using a glass frit (5). things are being done. Moreover, if the glass frit 5) is used for fixing, the assimilation work temperature can be lower than that for zero-surface sealing. Also.

Since the glass frit (51) acts as a cushion between the fixed parts, it is not necessary that the coefficients of thermal expansion of each part match perfectly.Therefore, there are also advantages such as a wider range of material selection for each part.

However, in the method for manufacturing a rung configured as described above, the pulp (1), the end plate (21), the stem (41
, the exhaust pipe (61) are each made of separate parts, and these are fixed on the surface of the end plate (2), so the number of parts and the number of places to be fixed during force fixing increases. Therefore, it is desirable that the coating work and assembly work of the glass frit (51) be streamlined as much as possible.

In addition, since glass frit (5) is used as a paste containing glass frit powder (51) in a vehicle with a binder, if the glass frit (5) is not sufficiently dried, the solvent and binder in glass frit (5) may It is trapped inside the bulb 11+ and has no adverse effect on the lamp characteristics.

If a molded product pre-formed as glass 7W (51) is used, the above problem will be eliminated.

In order to fix the bottom part 113 (13) of the pulp ill to the load, it must be the same size as the bottom diameter of the pulp (1), which creates a new problem that it is difficult to make large molded products. There is also a gap for heating and melting the glass frit (5).
After solidification, the bottom of the pulp +13 +13! I:i
When it is fixed, the previously fixed part is heated twice, causing thermal distortion and the like, resulting in a decrease in the strength of the fixed part.

C Summary of the Invention] This invention was made in view of the above circumstances,
This provides an improved manufacturing method for a lamp in which the pulp bottom, stem, and exhaust pipe are solidified on the end plate via a glass frit.In particular, the process involves coating the glass frit, assembling nine parts, The object of the present invention is to provide a fixing method that streamlines the bath fusion assimilation work of glass frit, facilitates automation of this work, and is favorable in terms of lamp characteristics.

[Embodiments of the invention]

, Next, embodiments of this invention are shown in FIGS. 2 to 6. I will explain based on this. In these figures, +1) is pulp.

This pulp fi+ is made of two U-shaped glass tubes made of soda glass with openings at both ends +121t13 at a temperature of -41! II
and communicate with the outside in an airtight manner. (21 is the open bottom of this pulp (1) (13 (square shape with 13 closed as an air vent)) is an end plate made of forsterite ceramics.

Furthermore, in a predetermined position of the upper surface of this end plate (21), there is a concave groove (audience 1) for receiving the open bottom 113+13 of the pulp tiJ
In one groove (2), a stem extension hole c24 for a stem (described later) is integrally formed, and in 111iSi of the other groove 1, an exhaust pipe insertion hole 1 is integrally formed. In addition, one groove 1
also serves as a stem answer.

(4) is a flared stem made of lead glass, and this stem 1
41 has an electrode (3) sealed therein, and a lead wire (to) and a glass capillary tube (2) protrude outward.

In addition, the flare diameter of this stem (4) is the above-mentioned pulp +
The diameter is slightly smaller than the inner diameter of the glass tube shown in No. 11. (6
) is an exhaust pipe made of lead glass, and near the end (61) of this exhaust pipe (6) on the side that is enclosed in the pulp fil, there is a buckwheat pipe with a diameter larger than that of the exhaust pipe insertion hole (a). Expanded diameter part C
6 Yu is formed. (55) is a cylindrical pellet made by molding a glass frit (51), which will be described later.

Also, I is pulp (the communication part of H, 19) is pulp II)
J) No phosphor coated on the inner surface.

Next, the glass frits of a lamp constructed in this way)
1. A glass frit powder containing lead borate as a main component (for example, Iwaki Meiko WF-TO29 manufactured by Iwaki Glass Co., Ltd.).

Vehicle (nitrified cotton dissolved in isoamyl acetate)
A paste-like glass frit (5) is prepared in advance by mixing the above.

As shown in Figure 3, the concave #I# (
2), (2) above glass frit +51't
Paint.

2. When the swaddling is completed, the end plate f21 is inserted into a tunnel drying oven (A) as shown in FIG. 4 and dried at about 150° C. for 15 minutes to dry the vehicle in the glass frit (5).

& Next, after inserting the exhaust pipe +61 into the exhaust pipe insertion hole @ of the end plate (one groove 1 of 21), insert the exhaust pipe (the tip of the exhaust pipe 61)
66), fit the bellet (55).

4. Next, place the stem (4) in the other groove of the end plate' (21) with the lead wire □□□ and the glass tube (2) inserted into the lead wire drawing hole/trowel. .

5. After this, put pulp (1) in each groove (73+4)
Place the bottom parts i13 and f13 of each. Figure 5 shows 3.
Indicates the state in which the work described in Section 4.5 has been completed. In addition(
B) is a tsumugi board support jig.

64 Once the assembly work is completed, put it in this state into the tunnel fixing furnace (0) as shown in Figure 6 and heat it at 450℃ for 5 minutes 11J1
Maintain glass frit (51, and glass frit (5
The first pellet (55) is melted in a heating bath to complete a series of fixing operations.

According to the solid phase method such as r Nawachiko J), pulp txt
The glass frit (5) can be applied to the required fixing places such as the bottom part 0 (3) and the stem (4) in one process, making the application process easier. During the coating and drying process of glass frit (5) on 2), there are no obstructions other than the end plate t2+, so it can be handled as a square plate.
Since the drying oven (A) can be used for 1iII times, it becomes easy to transport and take out the end plates (21) before and after each process.

On the other hand, to assemble the parts to the end plate (21), all you have to do is insert the vCZJF air yt6++ pellet (ss), stem (41, pulp (1)) and the Utaji mounting at the designated places on plate surface i4, so it is a series of operations. Since all the fixing is done in one heating process, the fixing process can be simplified and there is no decrease in the strength of the fixed part.

Furthermore, the vehicle in the pasty glass slit 15) is dried with only the glass frit (5 mm) coated on the front end plate (2) on which the pulp (υ) is placed.

The vehicle volatilizes smoothly and does not remain until the subsequent process.Therefore, there is no problem of vehicle being trapped in the pulp filtration. The pellet (55) used for fixing the exhaust pipe (61) is made by dry molding, so there is no such problem.
5) is a small diameter one, 2tz, and the manufacturing of the bellet (55) itself is not trivial.

In the case of the upper case #1, the bellet (55) is fitted to the tip (61) of the exhaust pipe (6) after inserting the exhaust pipe +61 into the matchmaker hole. (55) and insert this exhaust pipe 16I into the insertion hole (1) VC without any problem.

In addition, the airtight adhesion between the exhaust pipe 16) and the end plate (21) is achieved by pasting the upper surface of the enlarged diameter part (66) of the exhaust pipe (6) as shown in Fig. 1, instead of using the above-mentioned solid pellets (55). The shaped glass slit (5) is coated, and the frit (
It is also possible to insert the dried exhaust pipe (61) into the insertion hole ``C''. If this method is used, the pulp (1) and 8 by using the paste used for fixing the stem (4) as is.
! , the glass frit paste 15) can be used in common.Furthermore, in the above-described embodiment, the pulp 117 is provided in one place, but as shown in FIG.

This fixing method can also be applied to a rung with a double pipe structure consisting of a first valve 11 and a second pulp Q(I) that airtightly surrounds the first pulp tll. That is, the rung shown in FIG. In this case, a concave groove (5) for receiving the bottom end of the second pulp 4 is further formed in the end plate f21.
Pulp (When applying to the concave groove @1 of υ, this concave? # (2)
All you have to do is apply glass frit +51 on both sides. Further, to assemble the nine parts, after placing the first pulp (1), it is sufficient to place the second pulp QQ. 2. 8th
In the rung shown in the figure, a discharge space is formed by the second bulb 4 and the end plate (2).

The insertion hole @ of the exhaust pipe (61) does not need to be limited to the recess rs1.J, and the insertion hole @ can be provided in other parts as shown in the figure. a9 is a notch for gas conduction.

[@Ming effect]

As described in detail above, the present invention is a method for manufacturing a lamp that is fixed by a pulp, an end plate that closes the bottom of the pulp, and a glass frit. *The process of applying the adhesive, and the drying process of removing the solvent from the applied adhesive.
Insert an exhaust pipe with an enlarged diameter part that is larger in diameter than that of this exhaust 'Ef insertion hole into the exhaust pipe matcher hole of the end plate, and mold a bath agent-free molded pipe onto the enlarged diameter part of the exhaust pipe. The step of fitting the 7 glass slits, and placing the corresponding stem and pulp on the glass frit coated on the respective J'81 [1] points on the end plate surface, and then bathing each of the 7 glass slits. It is composed of a process of assimilation.

Glass frit coating work, drying work and assimilation work,
Furthermore, each component can be assembled to the end plate in one step. Furthermore, the work of connecting the valley processes can be done in a series of assembly operations, with the glass frit coated surface of the end plate being placed on top of the glass frit coating surface.

Therefore, manufacturing can be rationalized and automated, and product costs can be reduced. In addition, in the above manufacturing method, adhesive is applied in advance to the enlarged diameter part of the exhaust pipe, dried and coated separately, and this exhaust pipe is inserted into the exhaust U insertion hole of the end plate. In addition to this effect, there is also the advantage of being able to share 7 glasses.

[Brief explanation of drawings]

Figure 1 is a perspective view partially showing a small fluorescent lamp;
Figures 6 through 6 are diagrams explaining one embodiment of the present invention,
Fig. 2 is an exploded perspective view of the lamp, Fig. 5 is a sectional view showing the coating process, Fig. 4 is a drawing of the drying process, Fig. 5 is a sectional view showing the state of the glass frit before the solidification process, and Fig. 6 1 is a diagram of the solidification process of glass frit, and FIGS. 1 to 8 are diagrams showing other embodiments of the present invention. FIG. 1 is a partially enlarged view, and FIG. 8 is a diagram of a lamp. It is an I4 perspective view. In the figure, (11 is pulp, u2ft31-j valve bottom. (21 is end plate, (c) is the top surface of end plate, 1'!l is exhaust pipe insertion hole. (4) Hastem, +51 ha glass frit, ( ss)t
j, Peretz F t tel is an exhaust pipe, and (66) is an enlarged diameter portion. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Masuo Oiwa Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 8 Figure 8 Continued from page 1 [Aspect] Inventor Hiroshi Ito 0 Inventors 1) Minoru @ Inventor Jun Imai 5-1-1 Ofuna, Kamakura City, Mitsubishi Electric Corporation Ofuna Works

Claims (1)

[Claims] (1) A method for manufacturing a discharge lamp in which a pulp and an end plate that closes the bottom of the pulp are fixed with an adhesive, in which the adhesive is applied to a portion of the end plate surface where the pulp and the stem are to be fixed. step, a drying step to remove the applied bath salt, and an exhaust pipe that has an enlarged diameter part larger than the diameter of the exhaust fu insertion hole in the exhaust pipe insertion hole of the end plate. A step of fitting a molded adhesive that does not contain a bath agent onto the enlarged diameter part of the exhaust pipe, and a step of fitting the corresponding stem and A method for manufacturing a discharge lamp, comprising the step of melting and solidifying each of the adhesives described above after placing the pulp thereon. (2) A method for manufacturing a discharge lamp according to claim 1 B, characterized in that the bulb Fi is composed of a first pulp and a second pulp surrounding the first pulp in air. . (31) The method for manufacturing a discharge rung according to claim 1 or 2, characterized in that after inserting the exhaust pipe into the push-in hole, a molded adhesive containing no solvent is fitted. 4) The method for manufacturing a discharge lamp according to claim 1 or 2, characterized in that an exhaust pipe fitted with a molded adhesive that does not contain a solvent is inserted into the insertion hole. 5) A method for manufacturing a discharge rung in which pulp and an end plate that closes the bottom of the pulp are fixed with an adhesive. The drying process involves removing the solvent from the adhesive, forming an enlarged diameter part that is larger than the diameter of the exhaust pipe insertion hole provided in the end plate, applying adhesive to the upper side of the enlarged diameter part, and drying it. The process of inserting the pre-cooked exhaust pipe into the exhaust pipe insertion hole of the end plate, and placing the corresponding stem and pulp on the adhesive applied to each predetermined location on the end plate surface. A method for manufacturing a discharge lamp characterized by the step of melting and solidifying the agent in a T-bath.