JPH11339719A - Flat fluorescent lamp and production of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-size flat fluorescent lamp having a fine appearance and enabling to reduce its cost and a production of the same. SOLUTION: A flat container (A) is composed of a glass container 2 made of a soda-lime glass and a front glass 3 made of a soda-lime glass, and a spiral groove 2a to form a spiral discharge channel 1 in a plane perpendicular to a direction of thickness is formed on the glass container 2. An electrode part (D) is composed of a stem 5 for supporting an electrode 7 and a tube 4 made of a lead glass to which the stem 5 is sealed up at one end thereof. The glass container 2 and the electrode part (D) are made to abut to each other, a space between the glass container 2 and the front glass 3 are formed, and a fluorescent material is dispersed on predetermined positions on respective members. Calcination of the fluorescent material is performed in an electric furnace. In the said electric furnace, while a front surface of a brim part 2c of the glass container 2 and a peripheral part of a rear surface of the front glass 3 are made to abut to each other, the said abutted part as well as an abutted part of the glass container 2 and the tube 4 are welded, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small flat fluorescent lamp and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a small flat fluorescent lamp which is smaller than the existing fluorescent lamp and can be used as a planar light source, as shown in FIGS. For example, Japanese Patent Application Laid-Open No. 9-82279 (Conventional Example 1) and Japanese Patent Application No. 9-174467 (Conventional Example) 2), JP-A-10-3
No. 882 (conventional example 3).

[0003] The container A is a glass container 2 'in which a spiral groove 2a' for forming a spiral discharge path 1 in a plane orthogonal to the thickness direction is formed, and a glass container 2 '. It is composed of one disk-shaped (plate-shaped) front glass 3 which is hermetically attached to the glass container 2 'using the frit 11 (see FIG. 17) so as to cover the' groove 2a '. Here, the glass container 2 ′ has an annular outer peripheral wall 2.
A groove 2a 'is formed by forming a spiral-shaped partitioning portion 23' in which one end 23a 'is continuously integrated with 2' and the other end is located substantially at the center of the glass container 2 '. Groove 2
The above-mentioned electrodes 7, 7 are arranged at both ends of a ′, respectively, and one continuous discharge path 1 is formed between the two electrodes 7, 7 by the above-mentioned groove 2a ′. In other words, both electrodes 7, 7 are arranged near both ends of the groove 2a 'serving as the discharge path 1.

[0004] The glass container 2 'and the front glass 3 are made of glass, and a fluorescent material is attached to each of the key points. In this type of flat fluorescent lamp, light is extracted (emitted) to the outside through the front glass 3 by providing a reflection film on the glass container 2 '. As shown in FIG. 19, in order to increase the radiation efficiency of the
It is disclosed that the angle θ with respect to the inner bottom surface is formed in the range of 106 ° to 135 °.

Further, the glass container 2 ′ has two electrodes 7,
7 (located near both ends of groove 2a ')
, An insertion hole 2b 'is formed. Lead wires 6 are provided at both ends of the electrode 7 to electrically connect the electrode 7 to an external circuit.
6 are connected to each other.

At the periphery of the insertion hole 2b 'of the glass container 2', a cylindrical glass tube 4 having a flare-shaped stem 5 having the above-mentioned introduction lines 6 and 6 sealed at one end is provided.
Is hermetically attached using a frit (not shown). In addition, the electrode part D is comprised by the tube 4 and the stem 5.

Hereinafter, an example of a method for manufacturing the flat fluorescent lamp will be described with reference to FIG.

The electrode part D is formed by attaching the electrode 7 to the stem 5 and then sealing the stem 5 to one end of the tube 4 using a gas burner.

[0009] The glass container 2 'is coated with a reflective film on a predetermined portion on the front side, then coated with a phosphor and fired.

[0010] The front glass 3 is coated with a protective film on a predetermined portion on the rear surface side, subsequently coated with a phosphor and fired. Furthermore, the outer peripheral wall 2 of the glass container 2 ′ in the front glass 3
The frit 11 is applied (printed) to a portion corresponding to the front end face of the 2 ′ (that is, the rear side of the front glass 3), and calcination is performed to evaporate the organic components of the frit 11.

Electrode D, glass container 2 ', front glass 3
After assembling these three members after producing each separately, the rear side of the front glass 3 (that is,
The glass container 2 ′ is placed on the surface on which the frit 11 is provided), and the tube 4 is placed on the periphery of the insertion hole 2 b ′ of the glass container 2 ′ to apply a frit (not shown) (or frit). Using a ring). Thereafter, by performing a predetermined heat treatment (main firing of the frit 11), the front glass 3, the glass container 2 ', and the pair of electrode portions D, D are integrated. Subsequently, the inside of the container A is exhausted through an exhaust pipe (not shown) provided integrally with the stem 5, and a rare gas or the like is sealed.

By the way, when the front glass 3 and the glass container 2 'are hermetically attached by using the frit 11 as described above, the frit 11 has a thickness, so that the partition is continuously integrated with the outer peripheral wall 22'. A small gap G is formed between the front end face of the portion 23 'and the rear face of the front glass 3, as shown in FIGS. Therefore, depending on the size of the gap G, discharge occurs in the gap G when the lamp is turned on (hereinafter, referred to as “gap”).
Short-circuit discharge), a part of the discharge path 1 is short-circuited, and the current density per unit area increases at this part, the power consumption increases, and the light output decreases. Was. If such a gap G is present, the front glass 3 is bent by being pressed by the atmospheric pressure. If the frit 11 is too thick, a shear stress acts on the front glass 3 and the front glass 3 may be broken. Was. As means for preventing the occurrence of these inconveniences,
Partitioning portion 23 'distance H ₁ between the front surface and the front glass 3 (see FIG. 18) and 0.1mm or less, the partition portion 23' discharge path width of H ₂ the front end surface of the (see FIG. 18) as above 2mm It is disclosed to prevent 1 from being shorted.

[0013] The prior art 1 has a glass container 2 '.
It is also described that the glass and the front glass 3 are sealed using a gas burner. In this case, there is an advantage that the frit 11 becomes unnecessary.

[0014]

In manufacturing each of the above-mentioned conventional flat fluorescent lamps, it is necessary to apply a frit twice, and moreover, the frit 11 is used to attach the glass container 2 'and the front glass 3 to each other. In the case of mounting by means of a calcination, a calcination step is required. For this reason, in each of the above conventional examples,
Dedicated equipment for applying frit 11, frit 1
In addition to the necessity of a dedicated facility for pre-firing of No. 1 and an operation time of applying the frit 11 and pre-firing, the production cost is increased. In addition, when the front glass 3 and the glass container 2 'are sealed with the frit 11, the color of the frit 11 is conspicuous and the appearance is impaired.

When the glass container 2 ′ and the front glass 3 are sealed with the frit 11, the surface accuracy of the glass container 2 ′ (partition 23 ′) is required to prevent the short-circuit discharge.
(The surface accuracy of the front end face and the front end face of the outer peripheral wall 22 ') needs to be improved, and there is a problem that the material cost of the glass container 2' is increased. Further, in order to prevent the above-mentioned short-circuit discharge, the width H ₂ of the front end face of the partition 23 ′ is set to 2 as described above.
mm or more, and there are many portions that do not emit light when the lamp is turned on, so that there is a problem that the appearance when the lamp is turned on is deteriorated and that a reduction in the size of the lamp is hindered.

On the other hand, the prior art 1 has a glass container 2 '.
And the front glass 3 are sealed using a gas burner. However, when a gas burner is used, the glass container 2 ′ and the front glass 3 are partially heated.
There is a problem that the glass container 2 'and the front glass 3 are locally distorted, and the leakage of the sealing portion is likely to occur, so that the yield is not so good, and as a result, the manufacturing cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a small-sized flat fluorescent lamp which has good appearance and can be manufactured at low cost, and a method of manufacturing the same.

[0018]

In order to achieve the above object, the present invention has a flat discharge plate having a spiral discharge path formed in a plane perpendicular to the thickness direction. A container for extracting light from the front side with one side of the direction as a front surface, and two electrodes disposed near both ends of the discharge path, wherein the container has a spiral groove forming the discharge path on the front side. And a glass container made of glass on which a phosphor is attached, and a glass made of glass with a phosphor attached on the rear side, and the atmosphere around the container is directly combined with the front side of the glass container. It is characterized by being composed of a flat front glass that is air-tightly welded by being heated to a temperature near the softening point. A conventional process of applying a frit to the front glass, and pre-firing the frit That the process of Because the equipment and work time for becomes unnecessary I, it is possible to reduce the manufacturing cost.
In addition, since no frit is used to airtightly attach the glass container and the front glass, the appearance can be enhanced and the material cost can be reduced,
In addition, since there is no reduction in the luminous flux due to the frit, the appearance at the time of lighting is improved. In addition, since no unnecessary gap due to the frit is formed between the front glass and the glass container, a short circuit discharge caused by the unnecessary gap between the glass container and the front glass is prevented. The size of the lamp can be reduced.

According to a second aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path formed in a flat plate shape and spirally formed in a plane perpendicular to the thickness direction, and a fluorescent material is provided at a key position, A container that takes out light from the front side with one side of the direction as a front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode parts made of glass integrally provided with the electrodes, The container is composed of a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A front surface of a glass container and a rear surface of a front glass are opposed to each other, and a phosphor is sprayed on a predetermined portion on a front side of the glass container and a predetermined portion on a rear surface of the front glass. Spraying process and gala A firing step of firing the phosphor adhered to each of the container and the front glass, and heating the atmosphere around the container to near the softening point of the glass in a state where the front glass is directly combined with at least the front side of the glass container. And a fusing step for hermetically welding the glass and the front glass, wherein the firing step and the fusing step are performed in one furnace, and the glass container and the front glass are hermetically sealed without using a frit. The process of applying frit to the front glass and the process of pre-baking the frit are unnecessary, and the equipment and work time for the frit are unnecessary, and the appearance is eliminated by using no frit. And the material cost can be reduced, so that a small and low-cost flat fluorescent lamp can be provided. . In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and locally hardly distorted, the yield is improved as compared with the case where a gas burner is hardly generated, and as a result, the cost can be reduced. Further, in the spraying step, the phosphor is simultaneously applied to the glass container and the front glass, so that the working time can be shortened and the manufacturing cost can be reduced. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one furnace, the automation of the manufacturing process is facilitated, and ,
Since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to a third aspect of the present invention, in the second aspect of the invention, in the welding step, the front glass is directly combined with the front side of the glass container and the electrode portion is directly combined with the rear side of the glass container. By heating the surrounding atmosphere around the softening point of the glass, the glass container and the front glass are hermetically welded and the glass container and the electrode portion are hermetically welded. The part can be integrated by one heating.

According to a fourth aspect of the present invention, in the second aspect, the front glass and the glass container are each made of soft glass, so that the front glass and the glass container can be easily welded.

A fifth aspect of the present invention is characterized in that, in the fourth aspect of the present invention, the welding step is performed at a temperature near the softening point of the soft glass.

According to a sixth aspect of the present invention, in the third aspect of the present invention, the welding step includes the step of adding 10 g / cm to the vicinity of the contact portion between the glass container and the front glass and the vicinity of the contact portion between the glass container and the electrode portion. ^The method is characterized in that the step is performed in a state where a pressure of ² to 50 g / cm ² is applied.

According to a seventh aspect of the present invention, there is provided the above-mentioned thickness, wherein a hole is formed near both ends of a spirally formed discharge path in a plane perpendicular to the thickness direction, and a fluorescent material is provided at a key position. A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. A glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat plate made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat-type fluorescent lamp comprising:
The glass container is housed in an annular temporary holding member in which the container is housed, and the step formed on the front side of the temporary holding member receives the flange formed over the entire circumference on the front side of the glass container, and then temporarily holds the glass container. A glass container is provided by disposing a gap forming device having a mask for covering the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass on the member and placing the front glass on the gap forming device. Form a gap between the front glass,
Next, a ring-shaped pressing member is placed on the front glass, which is weighted over the entire periphery of the front glass, and then the phosphor is simultaneously sprayed on a predetermined portion on the front side of the glass container and a predetermined portion on the rear surface of the front glass. The electrode portion is fitted into a recess formed in the support, positioned, and the temporary holding member is placed on the support to bring the electrode portion into contact with the glass container, and the glass container and the front glass, respectively. The phosphor adhered to the glass is simultaneously fired in a furnace, and the gap forming device is moved in the furnace so that the front glass is placed on the flange of the glass container. The ambient temperature is heated to around the softening point of the glass by the above-described furnace, and the glass is welded in a gas-tight manner, and the glass container and the front glass are welded in a gas-tight manner without using a frit.
The process of applying a frit to the conventional front glass and the process of pre-baking the frit are not required, so that equipment and work time are not required, and since the frit is not used, the appearance can be enhanced and Since the material cost can be reduced, a small and low-cost flat fluorescent lamp can be provided. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and locally hardly distorted, the yield is improved as compared with the case where a gas burner is hardly generated, and as a result, the cost can be reduced. Further, the phosphor is sprayed in a state where the gap is formed by facing the glass container and the front glass using the gap forming device, and the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask. Therefore, the working time can be shortened, and the manufacturing cost can be reduced. In addition, the process of firing the phosphor and further welding the front glass and the electrode portion to the glass container can be performed by a continuous process using one furnace, which facilitates automation of the manufacturing process, Moreover,
Since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, since the metal to which the release agent is applied is used for the temporary holding member, the pressing member, and the gap forming device, respectively, the front glass, the glass container, and the electrode portion are used. After integrating the components, the work of removing the temporary holding member, the holding member, and the gap forming device becomes easy.

According to a ninth aspect of the present invention, in the invention of the seventh aspect, since the support is made of diatomaceous earth, the heat insulation of the support can be enhanced.

According to a tenth aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane orthogonal to the thickness direction, and a fluorescent material is provided at an important position, A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, a gap forming device having a mask for covering the front surface of the glass container flange portion and the peripheral portion of the rear surface of the front glass is disposed on the temporary holding member, and the front surface is placed on the gap forming device. A gap is formed between the glass container and the front glass by placing the glass, and then an annular pressing member is placed on the front glass over the entire periphery of the front glass, and then the glass container is placed. Predetermined part on the front side of A fluorescent material is simultaneously sprayed on a predetermined portion of the rear surface of the front glass, the electrode portion is fitted in a recess formed in the support, positioned, and the temporary holding member is placed on the support to form a glass. The phosphor is baked by bringing the electrode portion into contact with the container, heating the glass container and the front glass at 525 ° C. for 15 minutes using an electric furnace, and firing the phosphor. The front glass is placed on the flange portion of the glass container by moving the glass so that the contact portion between the flange portion of the glass container and the front glass becomes 3
A pressure of 5 g / cm ² was applied, and the temperature around the front glass, the glass container, and the electrode was adjusted to 760 using the above electric furnace.
The method is characterized in that the front glass and the electrode portion are hermetically welded to the glass container by heating at 10 ° C. for 10 minutes, and the glass container and the front glass are hermetically sealed by one heating without using a frit. Since the welding is performed and the glass container and the electrode portion are hermetically welded, the step of applying a frit to the front glass and the step of pre-baking the frit are unnecessary, and equipment and work time for the frit are unnecessary. Since no frit is used, the appearance can be enhanced and the material cost can be reduced, so that a small-sized and low-cost flat fluorescent lamp can be provided. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container to 760 ° C. in a state where the front glass is directly combined with the front side of the glass container, so that the glass container and the front glass are uniform. Since it is not heated and locally distorted, leakage is less likely to occur and the yield is improved as compared with the case where a gas burner is used, so that the cost can be reduced. In addition, since the electrode portion is positioned by the concave portion of the support, and the movement of the container is regulated by the temporary holding member,
The positioning between the electrode portion and the container is facilitated, and the application of an excessive force to the electrode portion can be prevented. Further, the phosphor is sprayed in a state where the gap is formed by facing the glass container and the front glass using the gap forming device, and the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask. Therefore, the working time can be shortened, and the manufacturing cost can be reduced. In addition, the process of firing the phosphor and further welding the front glass and the electrode portion to the glass container can be performed by a continuous process using one furnace, which facilitates automation of the manufacturing process, In addition, since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to the eleventh aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane orthogonal to the thickness direction, and a fluorescent material is provided at an important position, A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method for manufacturing a shaped fluorescent lamp, comprising a front glass placed on an annular support member, and a mask on the front glass for covering a peripheral portion of a rear surface of the front glass and a front surface of a flange portion of the glass container. A gap is formed between the front glass and the glass container by disposing a gap forming device and placing the glass container on the gap forming device, and then placing an annular temporary holding member in which the glass container is installed. After receiving the flange at the step formed on the temporary holding member, the phosphor is simultaneously sprayed on a predetermined portion on the front side of the glass container and a predetermined portion on the rear surface of the front glass, and the electrode portion is placed on the glass container. Positioning for After that, the holding block in which the recess for fitting the electrode portion is formed is placed on the temporary holding member, and the phosphors attached to the glass container and the front glass are simultaneously fired in a furnace to form the gap. By moving the apparatus in the furnace, the flange portion of the glass container is placed on the periphery of the rear surface of the front glass, and the temperature around the front glass, the glass container, and the electrode portion is set near the softening point of the glass by the furnace. It is characterized in that the glass container and the front glass are hermetically welded without using a frit, so that the frit is applied to the conventional front glass, and the frit is pre-baked. Eliminating the process, equipment and work time for it are not required, and because the frit is not used, the appearance can be improved and the material cost can be reduced. Since the can,
A small and low-cost flat fluorescent lamp can be provided. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and locally hardly distorted, the yield is improved as compared with the case where a gas burner is hardly generated, and as a result, the cost can be reduced. Further, the phosphor is sprayed in a state where the gap is formed by facing the glass container and the front glass using the gap forming device, and the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask. Therefore, the working time can be shortened, and the manufacturing cost can be reduced. In addition, the process of firing the phosphor and further welding the front glass and the electrode portion to the glass container can be performed by a continuous process using one furnace, which facilitates automation of the manufacturing process, In addition, since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to a twelfth aspect of the present invention, the discharge path is formed near the opposite ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction, and a fluorescent material is provided at an important position. A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, wherein a glass container is placed in an annular temporary holding member in which a container is provided, and is formed over the entire circumference of the front side of the glass container at a step formed on the front side of the temporary holding member. After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then, an annular pressing member that is weighted over the entire circumference of the front glass is placed on the front glass. The phosphor is applied to the inside of the container using the holes, the electrode portion is fitted into the recess formed in the support, positioned, and the temporary holding member is placed on the support to form the glass container. The electrode section is brought into contact with the The phosphor adhered to each of the glass container and the front glass was simultaneously fired in a furnace while circulating air in the container using the exhaust pipe, and then the temperature around the front glass, the glass container, and the electrode portion was changed to the above-described temperature. It is characterized by heating in the vicinity of the softening point of the glass with a furnace and sealing hermetically by fusing the glass container and the front glass without using a frit. The step and the step of pre-firing the frit become unnecessary, and equipment and work time for the step become unnecessary. Moreover, the appearance can be improved and the material cost can be reduced by not using the frit. Therefore, it is possible to provide a small, low-cost flat fluorescent lamp. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and locally hardly distorted, the yield is improved as compared with the case where a gas burner is hardly generated, and as a result, the cost can be reduced. In addition, since the phosphor is applied to the inside of the container using the hole of the glass container, the phosphor is applied to the glass container and the front glass at the same time, so that the working time can be shortened and the manufacturing cost can be reduced. It becomes possible to reduce. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one furnace,
The automation of the manufacturing process is facilitated, and the furnace is shared between the firing process and the welding process, so that the number of furnaces required for manufacturing is reduced and the installation area of the equipment can be reduced.

According to a thirteenth aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane orthogonal to the thickness direction, and a fluorescent material is provided at an important position. A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then an annular pressing member is placed on the front glass over the entire periphery of the front glass, thereby placing the glass container. A pressure of 35 g / cm ² is applied to the contact portion between the flange portion and the front glass, a phosphor is applied to the inside of the glass container using the above-mentioned hole, and the temporary holding member is placed on the support. The electrode part on the glass container Brought into contact, the temperature around the glass container and the front glass while circulating air into the container by using an exhaust pipe provided in the electrode portion in an electric furnace 52
The phosphor is baked by heating at 5 ° C. for 15 minutes, and then heated to 760 ° C. for 10 minutes by using the electric furnace at a temperature around the front glass, the glass container, and the electrode unit. It is characterized in that the front glass and the electrode portion are hermetically welded, and the glass container and the front glass are hermetically welded without using a frit. Since the step of calcination becomes unnecessary, equipment and work time for the step become unnecessary, and since the frit is not used, the appearance can be improved and the material cost can be reduced.
A small and low-cost flat fluorescent lamp can be provided. Further, by heating the atmosphere around the container to 760 ° C. in a state where the front glass is directly combined with the front side of the glass container, the front glass and the electrode portion are hermetically welded to the glass container. Since the front glass is uniformly heated and hardly locally deformed, the leak is less likely to occur and the yield is improved as compared with the case where a gas burner is used, so that the cost can be reduced.
In addition, since the phosphor is applied to the inside of the container using the hole of the glass container, the phosphor is applied to the glass container and the front glass at the same time, so that the working time can be shortened and the manufacturing cost can be reduced. It becomes possible to reduce. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one electric furnace, the automation of the manufacturing process is facilitated, In addition, since the furnace is shared between the firing step and the welding step, the number of electric furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to a fourteenth aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane orthogonal to the thickness direction, and a fluorescent material is provided at an important position, A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising placing a front glass on an annular support member, placing a glass container on the front glass, and then placing an annular temporary holding member in which the glass container is to be mounted. After receiving the flange of the glass container at the step formed on the temporary holding member by placing
The phosphor is applied to the inside of the container using the above-mentioned hole of the glass container, and after the electrode portion is positioned with respect to the glass container, the holding block having the recess for fitting the electrode portion is formed on the temporary holding member. Placed, the phosphor attached to each of the glass container and the front glass is simultaneously fired in a furnace while circulating air in the container using the exhaust pipe provided in the electrode portion,
Subsequently, the temperature around the front glass and the glass container and the electrode portion is heated to around the softening point of the glass by the above-mentioned furnace, and the airtight welding is performed, and the glass container and the front glass are separated without using a frit. Because it is welded in an airtight manner,
The process of applying a frit to the conventional front glass and the process of pre-baking the frit are not required, so that equipment and work time are not required, and since the frit is not used, the appearance can be enhanced and Since the material cost can be reduced, a small and low-cost flat fluorescent lamp can be provided. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and locally hardly distorted, the yield is improved as compared with the case where a gas burner is hardly generated, and as a result, the cost can be reduced. In addition, since the phosphor is applied to the inside of the container using the hole of the glass container, the phosphor is applied to the glass container and the front glass at the same time, so that the working time can be shortened and the manufacturing cost can be reduced. It becomes possible to reduce. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one furnace, the automation of the manufacturing process is facilitated, and Since the furnace is shared between the firing process and the welding process,
The number of furnaces required for production is reduced, and the installation area of the equipment can be reduced.

According to a fifteenth aspect of the present invention, in the second aspect, the electrode portion is welded to the glass container after the welding step, so that the electrode portion is easily welded to the glass container.

According to a sixteenth aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction, and a phosphor is provided at a key position, and A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, a gap forming device having a mask for covering the front surface of the glass container flange portion and the peripheral portion of the rear surface of the front glass is disposed on the temporary holding member, and the front surface is placed on the gap forming device. A gap is formed between the glass container and the front glass by placing the glass, and then an annular pressing member is placed on the front glass over the entire periphery of the front glass, and then the glass container is placed. Predetermined part on the front side of And simultaneously spraying the phosphor on a predetermined portion of the rear surface of the front glass, simultaneously firing the phosphor attached to the glass container and the front glass in a furnace, and moving the gap forming device in the furnace. The front glass is placed on the flange of the glass container, and the front glass and the glass container are hermetically welded by heating the temperature around the front glass and the glass container to around the softening point of the glass by the furnace, and thereafter. The step of applying a frit to a conventional front glass, characterized in that the electrode portion is brought into contact with the glass container, and the glass container and the electrode portion are heated and welded.
Since the step of pre-firing the frit becomes unnecessary, equipment and working time for the step become unnecessary, and since no frit is used, the appearance can be improved and the material cost can be reduced. A compact and low-cost flat fluorescent lamp can be provided.
In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and locally hardly distorted, the yield is improved as compared with the case where a gas burner is hardly generated, and as a result, the cost can be reduced. Further, the phosphor is sprayed in a state where the glass container and the front glass are opposed to each other using a gap forming device to form a gap, and the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask. Therefore, the phosphor can be sprayed on the glass container and the front glass at the same time, the working time can be shortened, and the manufacturing cost can be reduced. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one furnace, the automation of the manufacturing process is facilitated, and Since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing can be reduced, and the installation area of the equipment can be reduced.

According to a seventeenth aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction, and a fluorescent substance is provided at a key position, and A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, a gap forming device having a mask for covering the front surface of the glass container flange portion and the peripheral portion of the rear surface of the front glass is disposed on the temporary holding member, and the front surface is placed on the gap forming device. A gap is formed between the glass container and the front glass by placing the glass, and then an annular pressing member is placed on the front glass over the entire periphery of the front glass, and then the glass container is placed. Predetermined part on the front side of The phosphor is simultaneously sprayed on a predetermined portion on the rear surface of the front glass and the temperature around the glass container and the front glass is set to 525 ° C. using an electric furnace, and the phosphor is baked by heating for 15 minutes, thereby forming the gap. By placing the front glass on the flange of the glass container by moving the apparatus in the electric furnace, a pressure of 35 g / cm ² was applied to the contact portion between the flange of the glass container and the front glass, Subsequently, the temperature around the front glass and the glass container is heated to 760 ° C. using the above-described electric furnace for 10 minutes so that the front glass and the glass container are hermetically welded. Thereafter, the electrode portion is applied to the glass container. The glass container and the electrode section are welded by heating using a gas burner, and the glass container and the front glass are airtightly fused without using a frit. Because I wear
The process of applying a frit to the conventional front glass and the process of pre-baking the frit are not required, so that equipment and work time are not required, and since the frit is not used, the appearance can be enhanced and Since the material cost can be reduced, a small and low-cost flat fluorescent lamp can be provided. Further, the phosphor is sprayed in a state where the glass container and the front glass are opposed to each other using a gap forming device to form a gap, and the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask. Therefore, the phosphor can be sprayed on the glass container and the front glass at the same time, the working time can be shortened, and the manufacturing cost can be reduced. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one electric furnace, the automation of the manufacturing process is facilitated, Moreover, since the furnace is shared between the firing step and the welding step, the number of furnaces required for production is reduced,
The installation area of the equipment can be reduced. Further, the glass container and the front glass are hermetically welded by heating the atmosphere around the container to 760 ° C. in an electric furnace in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and locally hardly distorted, the yield is improved as compared with the case where a gas burner is hardly generated, and as a result, the cost can be reduced. In addition, since the electrode portion and the glass container are welded after the glass container and the front glass are integrated, welding between the glass container and the electrode portion is facilitated.

The invention according to claim 18 is characterized in that holes are formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction, and a phosphor is provided at a key position, and A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method for manufacturing a shaped fluorescent lamp, comprising a front glass placed on an annular support member, and a mask on the front glass for covering a peripheral portion of a rear surface of the front glass and a front surface of a flange portion of the glass container. A gap is formed between the front glass and the glass container by disposing a gap forming device and placing the glass container on the gap forming device, and then placing an annular temporary holding member in which the glass container is installed. After receiving the flange at the step formed on the temporary holding member, the phosphor is simultaneously sprayed on a predetermined portion on the front side of the glass container and a predetermined portion on the rear surface of the front glass, and the glass container and the front glass respectively. To The attached phosphors are simultaneously fired in a furnace, and the gap forming device is moved in the furnace so that the flange of the glass container is placed on the periphery of the rear surface of the front glass. By heating the ambient temperature around the softening point of the glass by the furnace, the front glass and the glass container are hermetically welded, and then the electrode portion is brought into contact with the glass container, and the glass container and the electrode portion are brought into contact with each other. It is characterized by heating and welding, eliminating the conventional process of applying frit to the front glass and the process of pre-firing the frit, eliminating the need for equipment and work time for that.
Moreover, since no frit is used, the appearance can be enhanced and the material cost can be reduced, so that a small-sized and low-cost flat fluorescent lamp can be provided. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and locally hardly distorted, the yield is improved as compared with the case where a gas burner is hardly generated, and as a result, the cost can be reduced. Further, the phosphor is sprayed in a state where the glass container and the front glass are opposed to each other using a gap forming device to form a gap, and the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask. Therefore, the phosphor can be sprayed on the glass container and the front glass at the same time, the working time can be shortened, and the manufacturing cost can be reduced. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one furnace, the automation of the manufacturing process is facilitated, and Since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing can be reduced, and the installation area of the equipment can be reduced.

According to a nineteenth aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction, and a fluorescent material is provided at an important position, and A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then, an annular pressing member that is weighted over the entire circumference of the front glass is placed on the front glass. The phosphor is applied to the inside of the container using the holes, and the phosphor adhered to each of the glass container and the front glass is simultaneously fired in a furnace while circulating the air inside the container using the holes of the glass container. Followed by the front gala And by heating the temperature around the glass container to the vicinity of the softening point of the glass by the above-mentioned furnace, the front glass and the glass container are hermetically welded, and thereafter, the electrode portion is brought into contact with the glass container, and the glass container and It is characterized by heating and welding the electrode part and eliminating the conventional process of applying a frit to the front glass and the process of pre-firing the frit, which eliminates the need for equipment and work time. When not used, the appearance can be enhanced and the material cost can be reduced, so that a small-sized and low-cost flat fluorescent lamp can be provided. In addition, since the phosphor is applied to the inside of the container using the hole of the glass container, the phosphor is applied to the glass container and the front glass at the same time, so that the working time can be shortened and the manufacturing cost can be reduced. It becomes possible to reduce. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and locally hardly distorted, the yield is improved as compared with the case where a gas burner is hardly generated, and as a result, the cost can be reduced. In addition, since the electrode portion and the glass container are welded after the glass container and the front glass are integrated, welding between the glass container and the electrode portion is facilitated.

According to a twentieth aspect of the present invention, the discharge path is formed near the opposite ends of the discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction. A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then an annular pressing member is placed on the front glass over the entire periphery of the front glass, thereby placing the glass container. A pressure of 35 g / cm ² is applied to the contact portion between the flange portion and the front glass, a phosphor is applied to the inside of the container using the above-mentioned hole of the glass container, and the inside of the container is used for the above-mentioned hole of the glass container. Circulating air through the glass The phosphor is fired by heating the surroundings of the vessel and the front glass to 525 ° C. for 15 minutes using an electric furnace, and then the temperature around the front glass and the glass container is raised to 760 ° C. using the electric furnace. By heating for 10 minutes, the front glass and the glass container are hermetically welded, and then the electrode portion is brought into contact with the glass container, and the glass container and the electrode portion are welded by heating using a gas burner. It eliminates the conventional process of applying frit to the front glass and the process of pre-baking the frit, which eliminates the need for equipment and work time.Furthermore, since no frit is used, the appearance is reduced. Since the cost can be increased and the material cost can be reduced, a small-sized and low-cost flat fluorescent lamp can be provided. In addition, since the phosphor is applied to the inside of the container using the hole of the glass container, the phosphor is applied to the glass container and the front glass at the same time, so that the working time can be shortened and the manufacturing cost can be reduced. It becomes possible to reduce. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container to 760 ° C. in a state where the front glass is directly combined with the front side of the glass container, so that the glass container and the front glass are uniform. Since it is locally heated and hardly deformed locally, the leak is less likely to occur and the yield is improved as compared with the case where a gas burner is used, so that the cost can be reduced. In addition, since the electrode portion and the glass container are welded after the glass container and the front glass are integrated, welding between the glass container and the electrode portion is facilitated.

According to a twenty-first aspect of the present invention, the discharge path is formed near the both ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction, and a fluorescent material is provided at an important position. A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate composed of a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method for manufacturing a shaped fluorescent lamp, comprising placing a front glass on an annular support member, placing a glass container on the front glass, and then placing an annular temporary holding member in which the glass container is provided. After receiving the flange at the step formed on the temporary holding member, the phosphor is applied to the inside of the container using the hole of the glass container, and the phosphor adhered to each of the glass container and the front glass is heated by the furnace. Simultaneously firing in the glass, and then heating the temperature around the front glass and the glass container to near the softening point of the glass by the above-mentioned furnace to hermetically weld the front glass and the glass container, and then to the glass container electrode The frit is applied to the glass container and the electrode part by heating, and the frit is applied to the front glass and the step of pre-firing the frit is unnecessary, and the equipment and work time for the frit are eliminated. Is unnecessary, and since no frit is used, the appearance can be enhanced and the material cost can be reduced, so that a small and low-cost flat fluorescent lamp can be provided. In addition, since the phosphor is applied to the inside of the container using the hole of the glass container, the phosphor is applied to the glass container and the front glass at the same time, so that the working time can be shortened and the manufacturing cost can be reduced. It becomes possible to reduce. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and locally hardly distorted, the yield is improved as compared with the case where a gas burner is hardly generated, and as a result, the cost can be reduced. In addition, since the electrode portion and the glass container are welded after the glass container and the front glass are integrated, welding between the glass container and the electrode portion is facilitated.

According to a twenty-second aspect of the present invention, in the eighteenth, nineteenth, or twenty-first aspect, the glass container and the electrode portion are welded by heating using a gas burner. Can be easily welded.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) As shown in FIGS. 1 and 2, a flat fluorescent lamp according to the present embodiment is located near both ends of a spiral discharge path 1 formed in a flat container A. FIG. Electrodes 7, 7 composed of filaments are provided. Here, the container A takes out light from the front side with one surface in the thickness direction (vertical direction in FIG. 1) as a front surface, and forms a spiral discharge path 1 in a plane orthogonal to the thickness direction. Container 2 having a spiral groove 2a formed on the front side thereof, and one disk-shaped (flat plate) mounted on the front side of glass container 2 so as to cover groove 2a of glass container 2.
And the front glass 3. In addition, the glass container 2 has a cross section reverse V from a part of the inner peripheral surface of the annular outer peripheral wall 22.
A spiral-shaped partitioning portion 23 is formed continuously and integrally. The other end of the partition 23 extends to substantially the center of the glass container 2. Here, the glass container 2 is what is called molded glass, and is made by molding.

The glass container 2 has circular holes 21 formed near both ends of the groove 2a, and one end of the cylindrical tube 4 is sealed around the periphery of the hole 21. Here, the tube 4 is made of lead glass (made of soft glass), and one end is sealed to the glass container 2 near the both ends of the groove 2a so that the axial direction coincides with the thickness direction of the container A. Then, the inner space of the tube 4 passes through the hole 21 and the discharge path 1
Will be in communication. The tube 4 is provided with the above-mentioned electrode 7 in an internal space, and a lead wire 6 connected to both ends of the electrode 7.
Is sealed at the other end in the axial direction. Therefore, one continuous discharge path 1 is formed between the electrodes 7, 7 by the hole 21 and the groove 2a. In other words, both electrodes 7, 7 are arranged near both ends of the groove 2a serving as the discharge path 1. In addition, the stem 5 and the tube 4 constitute the electrode part D.

The glass container 2 and the front glass 3 are formed of a soft glass such as soda-lime glass which is a light-transmitting material. You. After exhausting the inside of the container A through an exhaust pipe 8 (see FIG. 6) described later, a rare gas or the like is sealed.

Hereinafter, a method for manufacturing the flat fluorescent lamp will be described with reference to FIG.

The electrode portion D is formed by attaching the electrode 7 to the stem 5 and then sealing the stem 5 to one end of the tube 4 using a gas burner.

The glass container 2, the front glass 3, and the electrode part D are integrated by the following procedure.

As shown in FIG. 4, the glass container 2 is housed in a temporary holding member 35, and a step 35a formed on the front side of the temporary holding member 35 forms a flange formed all around the front side of the glass container 2. Part 2c is received. Here, the step 35a
Is formed in a shape that restricts the downward movement (downward direction in FIG. 4) and horizontal movement of the glass container 2.

Thereafter, the gap forming device 10 is placed on the temporary holding member 35. Here, the gap forming device 10
5A and 5B, a pair of bases 11, 1
1. Each of the bases 11 has a guide portion 11a, which will be described later, formed at an end on the side opposite to each other. A mask piece 12 extends, and a thin C-shaped mask piece 13 whose thickness direction coincides with the vertical direction of the base 11 extends from an end of the lower surface of the base 11. The base 11 is slidable on the temporary holding member 35. When the bases 11 and 11 are moved toward each other, the end faces of the mask pieces 12 and 12 and the end faces of the mask pieces 13 and 13 respectively come into contact with each other. contact, an annular mask M ₁ and the mask M ₂ is formed as shown in Figure 5 (a). 5A shows a state where the end faces of the mask pieces 12 and 12 and the end faces of the mask pieces 13 and 13 are in contact with each other, and FIG. 5B shows a state where the end faces of the mask pieces 12 and 12 and the mask This shows a state in which the end faces of the pieces 13 are separated from each other. In a state of mounting a gap forming device 10 on the temporary holding member 35 as shown in FIG. 4, the lower side of the lower surface (rear surface) of the mask M ₂ is the flange portion 2c of the glass container 2
(And the front end face of the outer peripheral portion 22).

Thereafter, the front glass 3 is placed on the gap forming device 10 so that the vertical thickness of the base 11 and the masks M ₁ , M A gap corresponding to the thickness of ₂ is formed. In this state, the front glass 3 is supported by both the base 11, the peripheral portion of the rear surface of the front glass 3 contacts the upper surface of the mask M ₁ (front).

Thereafter, an annular pressing member 36 whose outer shape is substantially equal to the outer shape of the front glass 3 is placed on the front glass 3 to obtain a state as shown in FIG.

Thereafter, the phosphor is sprayed on the front side of the glass container 2 and the rear side of the front glass 3 by the spray 50 using the gap formed through the gap forming apparatus 10 described above. However, the phosphor is not attached to the portion covered by the masks M ₁ and M ₂ .

Next, as shown in FIG. 6, the electrode portion D is fitted into a recess 34a formed in a support 34 made of diatomaceous earth (the tube 4 is brought into contact with the bottom surface of the recess 34a). Position. The support 34 is provided with a communication hole 34b communicating the bottom surface of the recess 34a and the rear surface of the support 34, and the exhaust pipe 8 provided on the stem 5 is inserted into the communication hole 34b. .

Next, the glass container 2, the gap forming device 10, the front glass 3, and the temporary holding member 35 provided with the pressing member 36 are placed on the support 34 (pedestal) to obtain the state shown in FIG. Is obtained. In the support 34, a hole 34 into which the exhaust pipe 8 formed integrally with the stem 5 is inserted is provided between the bottom surface of the recess 34a and the rear surface of the support 34.
b is perforated. Here, the support block B is composed of the support 34 and the temporary holding member 35. In this state, one end of the tube 4 of the electrode portion D abuts on the periphery of the hole 21 on the rear surface side of the glass container 2, and between the rear surface of the glass container 2 and the front surface of the support 34 (the upper surface in FIG. 4). 1m
A gap of about m is formed, and a gap of about 1 mm is also formed between the rear surface of the flange 2c of the glass container and the bottom surface of the step 35a. In short, the glass container 2 is lifted by the tube 4. Hereinafter, the support 34 and the temporary holding member 3
5, glass container 2, gap forming device 10, front glass 3,
The block constituted by the pressing member 36 is referred to as an object to be processed.

Next, the object to be processed is heated by a heating device 40 shown in FIG.
On the conveyor 42 of Here, the workpiece moves from the left side to the right side in FIG. That is, the object moves in the electric furnace 41 in the direction of arrow C in FIG. Here, the electric furnace 41 of the heating device 40 is a two-temperature furnace, and as shown in FIG.
First zone Z ₁ is a temperature such as may be fired phosphors left in 1 (for example, 525 ° C.) is maintained in the third zone Z ₃ to the right in an electric furnace 41 is softened soda lime glass (Eg, 760 ° C.). That is, in the present embodiment, a firing step of firing the phosphor adhered to the front side of the glass container 2 and the phosphor adhered to the rear side of the front glass 3, The welding step of welding the pair of electrode portions D, D can be continuously performed by one electric furnace 41.

Therefore, when the object to be processed is placed on the conveyor 42 outside the electric furnace 41 (the left side in FIG. 7), the object is conveyed into the electric furnace 41 and gradually heated, and the temperature in the furnace becomes 525. firing of the phosphor takes place when passing through the first zone Z ₁ of ° C. (time required for passing 15 minutes). Then, a second zone between the _first zone Z ₁ and the third zone Z ₃
Although it will pass through the zone Z _2, a second zone Z ₂
Has at least one pair of poles 4 in a plane orthogonal to the moving direction of the conveyor 42 (that is, the moving direction of the workpiece).
3, 43 are arranged at a predetermined distance from each other. By the way, as shown in FIG. 9A, the base 11 is moved by the L-shaped lever 44 that can rotate in the direction along the upper surface of the temporary holding member 35, as shown in FIG. I have. An L-shaped guide member 38 for guiding the movement of the base 11 is provided on the temporary holding member 35. Here, the lever 44 is rotatably mounted on a rotating shaft 35 c protruding from the upper surface of the temporary holding member 35.
A long hole 46 is formed in one of the pieces of the lever 44 along the longitudinal direction of the piece.
A pin 11c protruding from the upper surface is inserted.

That is, the object to be processed is a pair of poles 4
When the arm 45, which is the other piece of the lever 44, comes into contact with the pawl 43 when passing between the levers 43, 43, the lever 44 rotates as shown in FIG.
The two bases 11 move away from each other in accordance with the rotation of. Then, the front glass 3 moves downward along the guide portion 11a of each base 11, and the peripheral portion of the rear surface of the front glass 3 contacts the front surface of the flange portion 2c of the glass container 2 and the front end surface of the outer peripheral portion 22. In short, the front glass 3 is the base 11
It moves downward with the movement of. The temporary holding member 35
Is a rod 39 that parasitically moves the front glass 3 in the horizontal direction.
Is erected. Here, 35 g /
A state in which a pressure of cm ² is applied is obtained. The pressure of the holding member 36 is 10 g / cm ² to 50 g / c.
It is desirable to set the weight so as to be m ² . If the pressure is too low, the welding described below may be insufficient, and if the pressure is too high, the tube 4 may be deformed.

Thereafter, when the object to be processed passes through the third zone Z ₃ having a furnace temperature of 760 ° C. (the time required for the passage is 10 minutes), the front surface of the flange 2 c of the glass container 2 and the front glass 3 and the hole 2 of the glass container 2
Each contact portion between the periphery of the tube 1 and the tube 4 is hermetically welded (that is, heated and welded). The temperature of the third zone Z ₃ is preferably set in the vicinity of the softening point of soda-lime glass which has been approved in the United States Society for Testing and Materials (ASTM).

That is, in the present embodiment, the sintering step of the phosphor and the welding step are continuously performed in the same electric furnace 41, and when passing through the _third zone Z3, the glass container 2
, Front glass 3 and electrode part D are integrated. afterwards,
The inside of the container A is evacuated through the exhaust pipe 8 to fill a rare gas or the like.

The temporary holding member 35, the holding member 36, and the base 11 are made of stainless steel, and a release agent is previously applied to each surface thereof. After the front glass 3, the glass container 2, and the temporary holding member D are integrated with each other, the pressing member 36 and the electrode portion 35 can be easily removed.

In this embodiment, however, the glass container 2
And the front glass 3 can be welded hermetically without using a frit, so that the appearance can be improved and the material cost can be reduced. Further, the work of applying a frit or pre-baking is not required, and equipment and work time for the work are not required, and the cost can be reduced. Further, in the above-described manufacturing method, the front glass 3 is deformed by its own weight so that the gap between the front glass 3 and the front end face of the partition 23 of the glass container 2 is closed during heating by the electric furnace 41. It is difficult to form a gap between the portion 23 and the front glass 3, and even if the surface accuracy of the glass container 2 is lower than in the conventional example, the end face of the partition 23 ′ and the front glass 3 as in the conventional example can be formed. Short-circuit discharge that occurs due to the presence of a gap therebetween can be prevented, and the width of the front end face of the partition 23 can be made smaller than in the conventional example, so that the appearance during lighting can be improved.

The glass container 2 and the front glass 3 are hermetically sealed by heating the atmosphere around the container A near the softening point of the soda-lime glass in a state where the front glass 3 is directly combined with the front side of the glass container 2. The glass container 2 and the front glass 3 are uniformly heated, and local distortion is unlikely to occur.
Leakage is less likely to occur in the sealing portion with the peripheral portion, and the yield is improved as compared with the case where a gas burner is used, and as a result, the cost can be reduced.

The glass container 2 and the front glass 3 are opposed to each other using the gap forming device 10 to form a gap, and the front surface of the flange 2c of the glass container 2 and the peripheral portion of the rear surface of the front glass 3 are masked by a mask M. since spraying the phosphor while covering at _2, M _1, it is possible to shorten the working time for applying the phosphor, it is possible to reduce the manufacturing cost. In addition, the process of firing the phosphor, and thereafter, the process of welding the front glass 3 and the electrode portion D to the glass container 2 can be performed by a continuous process using one electric furnace 41. In addition, since the electric furnace 41 is shared between the firing step and the welding step, the number of electric furnaces 41 required for manufacturing can be reduced, and the installation area of the equipment can be reduced. In the object to be processed in the first embodiment, the front glass 3 is disposed on the glass container 2 via the gap forming device 10, but the vertical relationship in FIG. The welding may be performed in a state where the flange on the front side of the glass container 2 is placed. In this case, the above-mentioned holding member 36 constitutes a support member, and the support body 34 constitutes a holding block.

(Embodiment 2) The basic structure of the flat fluorescent lamp of this embodiment is almost the same as that of Embodiment 1 and is characterized by its manufacturing method. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted, and description of the same steps as those in the manufacturing method described in the first embodiment will also be omitted.

In this embodiment, the gap forming device 10 described in the first embodiment is not used. In other words, in the present embodiment, the glass container 2 is housed in the temporary holding member 35, and the stepped portion 35 a formed on the front side of the temporary holding member 35 forms the flange portion 2 c formed over the entire circumference on the front side of the glass container 2. After receiving, the front glass 3 is placed on the flange 2c of the glass container 2,
Next, by placing the pressing member 36 on the front glass 3, a pressure of 35 g / cm ² is applied to the contact portion between the flange 2 c of the glass container 2 and the front glass 32, and the hole 21 of the glass container 2 is used. Then, the phosphor is applied to the inside of the container A, and the electrode part D is brought into contact with the glass container 2 by placing the temporary holding member 35 on the support 34 as shown in FIG. Thereafter, performing the firing step and the welding step continuously, in the present embodiment, the direction of the arrow F ₁ in the circulation (e.g. 10 air into the container A by using an exhaust pipe 8 provided on the stem 5 in introducing air through one of the exhaust pipe 8, while the air was a derived) it is in the direction of arrow F ₂ through the other exhaust pipe 8, firing the phosphor. That is, since the phosphor is baked in a state where oxygen is supplied to the vicinity of the phosphor surface, air can be sufficiently brought into contact with the phosphor, and the calcination can be performed efficiently. In the present embodiment, the step of disposing the gap forming device 10 between the glass container 2 and the front glass 3 is not required, so that the production becomes easy and the production cost can be reduced.

The object to be processed in the second embodiment has the front glass 3 disposed on the glass container 2.
The welding may be performed in a state in which the vertical relationship in FIG. In this case, the above-mentioned holding member 36 constitutes a support member, and the support body 34 constitutes a holding block.

(Embodiment 3) The basic configuration of this embodiment is almost the same as that of Embodiment 1, and the manufacturing method is different. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, as shown in FIG. 13, the stem 5 constitutes the electrode portion D, and a cylindrical tubular portion 2 d is formed on the rear surface side of the glass container 2 toward the rear from the peripheral edge of the hole 21. The stem 5 is sealed to the tip of the cylindrical portion 2d.

Hereinafter, a method for manufacturing the flat fluorescent lamp according to the present embodiment will be described with reference to FIG.

The electrode section D is formed by attaching an electrode 7 (filament) to the stem 5.

The glass container 2, the front glass 3, and the electrode part D are integrated in the following procedure.

First, as shown in FIG.
Is stored in the temporary holding member 35, and the stepped portion 35 a formed on the front surface side of the temporary holding member 35 receives the flange portion 2 c formed over the entire circumference on the front side of the glass container 2. The gap forming device 10 is placed. Thereafter, the front glass 3 is placed on the gap forming device 10 so that the vertical thickness of the base 11 and the thicknesses of the masks M ₁ and M ₂ are provided between the front surface of the glass container 2 and the rear surface of the front glass 3. Is formed. Then, on the front glass 3, an annular holding member 3 whose outer shape is substantially equal to the outer shape of the front glass 3 is provided.
By placing 6, the state shown in FIG. 12 is obtained.

Thereafter, the glass container 2 is sprayed using the gap formed through the gap forming apparatus 10 described above.
Are scattered on the front side and the rear side of the front glass 3. However, the phosphor is not attached to the portion covered by the masks M ₁ and M ₂ . Hereinafter, the temporary holding member 35, the glass container 2,
A block constituted by the gap forming device 10, the front glass 3, and the pressing member 36 is referred to as an object to be processed.

Next, as in the first embodiment, the object is processed as shown in FIG.
Is placed on the conveyor 42 of the heating device 40 shown in FIG. That is, in the present embodiment, the firing step of firing the phosphor adhered to the front side of the glass container 2 and the phosphor adhered to the rear side of the front glass 3 and the glass container 2 and the front glass 3 are performed. The welding step for welding can be performed continuously by one electric furnace 41. That is, in this embodiment, firing of the phosphor is performed when the object to be treated passes through the first zone Z ₁ of the electric furnace 41, a glass container 2 and the front when passing through the third zone Z ₃ The welding with the glass 3 is performed.

Thereafter, as shown in FIG. 13, a stem 5 constituting an electrode portion D is provided
And the stem 5 is heated by a gas burner to weld the stem 5 to the cylindrical portion 2d. Subsequently, the inside of the container A is exhausted through the exhaust pipe 8, and a rare gas or the like is sealed.

In this embodiment, as in the first embodiment, the frit is not used to attach the glass container 2 to the front glass 3 as in the first embodiment. Cost can be reduced. Further, the work of applying a frit or pre-baking is not required, and equipment and work time for the work are not required, and the cost can be reduced. Further, in the above-described manufacturing method, the front glass 3 is deformed by its own weight so as to close the gap between the front glass 3 and the front end face of the partition 23 of the glass container 2 during heating by the electric furnace. Even if the surface accuracy of the glass container 2 is lower than that of the conventional example, the gap between the end face of the partition 23 'and the front glass 3 can be reduced.
Can be prevented due to the presence of a gap between the partition 23 and the width of the front end face of the partition 23 can be reduced as compared with the conventional example, so that the appearance during lighting can be improved. it can.

Further, in a state where the front glass 3 is directly combined with the front side of the glass container 2, the atmosphere around the container A is heated to near the softening point of soda-lime glass so that the glass container 2 and the front glass 3 are airtight. The glass container 2 and the front glass 3 are uniformly heated, and local distortion is hardly generated.
Leakage is less likely to occur at the sealing portion with the peripheral portion, and the yield is improved as compared with the case where a gas burner is used as a means for welding the glass container 2 and the front glass 3, and as a result, the cost can be reduced.

By the way, in the third embodiment, the front glass 3 is disposed on the glass container 2 via the gap forming device 10 in the third embodiment. The welding may be performed in a state where the flange on the front side of the glass container 2 is placed on the periphery of the rear surface. In this case, the above-mentioned holding member 36 constitutes a supporting member.

(Embodiment 4) The basic structure of a flat fluorescent lamp of this embodiment is almost the same as that of Embodiment 3, and is characterized by its manufacturing method. The same components as those in the third embodiment are denoted by the same reference numerals, and the description thereof will be omitted. The description of the same steps as those in the manufacturing method described in the third embodiment will also be omitted.

In the present embodiment, the gap forming device 10 described in the third embodiment is not used. That is, in the present embodiment, as shown in FIG. 14, the glass container 2 is put in the temporary holding
After receiving the flange 2c formed over the entire circumference of the front side of the glass container 2 at 5a, the front glass 3 is placed on the flange 2c of the glass container 2, and then the pressing member 3 is placed on the front glass 3
6, a pressure of 35 g / cm ² is applied to the contact portion between the flange 2 c of the glass container 2 and the front glass 32,
The phosphor is applied to the inside of the container A using the cylindrical portion 2d (and the hole 21) of the glass container 2. Therefore, in the present embodiment, a block composed of the temporary holding member 35, the glass container 2, the front glass 3, and the pressing member 36 is the object to be processed.

The firing step and the welding step are continuously performed in the electric furnace 41 as in the third embodiment. In this embodiment, the cylindrical portion 2d of the glass container 2 (and the hole 21) is used. (air was introduced through one of the cylindrical portion 2d in the direction of the arrow F ₁ in example 14, to derive the air in the direction of arrow F ₂ through the other of the cylindrical portion 2d) circulating air into the container a Te is allowed While firing, the phosphor is fired. That is,
Since the phosphor is baked in a state in which oxygen is supplied to the vicinity of the phosphor surface, the phosphor can be sufficiently brought into contact with air, and the calcination can be performed efficiently.

Thereafter, similarly to the third embodiment, the stem 5 constituting the electrode portion D is provided at the tip of the cylindrical portion 2d of the glass container 2.
Is heated by a gas burner to weld the stem 5 to the cylindrical portion 2d, and then the inside of the container A is exhausted through the exhaust pipe 8 to enclose a rare gas or the like.

In the present embodiment, the step of disposing the gap forming device 10 between the glass container 2 and the front glass 3 becomes unnecessary, so that the manufacturing becomes easier as compared with the manufacturing method described in the third embodiment. In addition, the manufacturing cost can be reduced.

Incidentally, the object to be processed in the fourth embodiment has the front glass 3 disposed on the glass container 2.
The welding may be performed in a state where the vertical relation in FIG. 14 is reversed and the front flange portion of the glass container 2 is placed on the peripheral portion of the rear surface of the front glass 3. In this case, the above-mentioned holding member 36 constitutes a supporting member.

[0083]

According to the first aspect of the present invention, light is extracted from the front side with the one surface in the thickness direction as a front surface having a discharge path formed in a flat plate shape and spirally formed in a plane perpendicular to the thickness direction. A container and 2 disposed near both ends of the discharge path.
The container has a glass container made of glass on which a spiral groove forming the discharge path is provided on the front side and a phosphor is attached, and the phosphor is attached on the back side. It is composed of flat glass front glass that is airtightly welded by heating the atmosphere around the container near the softening point of the glass in a state of being directly combined with the front side of the glass container in a state where it is made of glass. The process of applying a frit to a conventional front glass and the process of pre-baking the frit are not required, and equipment and work time for the process are not required.
There is an effect that the manufacturing cost can be reduced.
In addition, since no frit is used to airtightly attach the glass container and the front glass, the appearance can be enhanced and the material cost can be reduced,
In addition, since there is no reduction in the light flux due to the frit, there is an effect that the appearance at the time of lighting is improved. In addition, since no unnecessary gap due to the frit is formed between the front glass and the glass container, a short circuit discharge caused by the unnecessary gap between the glass container and the front glass is prevented. Thus, there is an effect that the size of the lamp can be reduced.

According to a second aspect of the present invention, there is provided the above-mentioned thickness, wherein a hole is formed near both ends of a spirally formed discharge path in a plane orthogonal to the thickness direction, and a phosphor is provided at a key position. A container that takes out light from the front side with one side of the direction as a front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode parts made of glass integrally provided with the electrodes, The container is composed of a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A front surface of a glass container and a rear surface of a front glass are opposed to each other, and a phosphor is sprayed on a predetermined portion on a front side of the glass container and a predetermined portion on a rear surface of the front glass. Spraying process and gala A firing step of firing the phosphor adhered to each of the container and the front glass, and heating the atmosphere around the container to near the softening point of the glass in a state where the front glass is directly combined with at least the front side of the glass container. And a front glass is hermetically welded. Since the firing step and the welding step are performed in one furnace, the glass container and the front glass are hermetically welded without using a frit. It is possible to eliminate the conventional process of applying frit to the front glass and the process of pre-baking the frit, which eliminates the need for equipment and work time,
In addition, since no frit is used, the appearance can be enhanced and the material cost can be reduced, so that there is an effect that a small and low-cost flat fluorescent lamp can be provided. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and hardly deformed locally, there is an effect that the yield is improved as compared with the case where a gas burner is hardly generated and the cost can be reduced as a result. Also,
In the spraying step, since the phosphor is applied to the glass container and the front glass at the same time, the working time can be shortened and the production cost can be reduced. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one furnace, the automation of the manufacturing process is facilitated, and Since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to a third aspect of the present invention, in the second aspect of the invention, in the welding step, the front glass is directly combined with the front side of the glass container and the electrode portion is directly combined with the rear side of the glass container. By heating the surrounding atmosphere around the softening point of the glass, the glass container and the front glass are hermetically welded and the glass container and the electrode portion are hermetically welded. There is an effect that the part can be integrated by one heating.

According to a fourth aspect of the present invention, in the second aspect of the present invention, since the front glass and the glass container are each made of soft glass, there is an effect that the front glass and the glass container can be easily welded.

According to a seventh aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction, and a fluorescent substance is provided at a key position, A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. A glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat plate made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat-type fluorescent lamp comprising:
The glass container is housed in an annular temporary holding member in which the container is housed, and the step formed on the front side of the temporary holding member receives the flange formed over the entire circumference on the front side of the glass container, and then temporarily holds the glass container. A glass container is provided by disposing a gap forming device having a mask for covering the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass on the member and placing the front glass on the gap forming device. Form a gap between the front glass,
Next, a ring-shaped pressing member is placed on the front glass, which is weighted over the entire periphery of the front glass, and then the phosphor is simultaneously sprayed on a predetermined portion on the front side of the glass container and a predetermined portion on the rear surface of the front glass. The electrode portion is fitted into a recess formed in the support, positioned, and the temporary holding member is placed on the support to bring the electrode portion into contact with the glass container, and the glass container and the front glass, respectively. The phosphor adhered to the glass is fired in a furnace at the same time, and the front glass is placed on the flange of the glass container by moving the gap forming device in the furnace. Since the surrounding temperature is heated to the vicinity of the softening point of the glass by the above-mentioned furnace and the airtight welding is performed, the glass container and the front glass can be airtightly welded without using a frit, and the frit is applied to the conventional front glass. To process, equipment and work time therefor becomes unnecessary step of calcination of the frit is not necessary, moreover, by not using the frit,
Since the appearance can be enhanced and the material cost can be reduced, there is an effect that a small and low-cost flat fluorescent lamp can be provided. Also,
By heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container, the glass container and the front glass are hermetically welded. Since it is uniformly heated and hardly deformed locally, there is an effect that the yield is improved as compared with the case where a gas burner is hardly generated and the cost can be reduced as a result.
Further, the phosphor is sprayed in a state where the gap is formed by facing the glass container and the front glass using the gap forming device, and the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask. So the work time can be shortened,
There is an effect that the manufacturing cost can be reduced. In addition, the process of firing the phosphor and further welding the front glass and the electrode portion to the glass container can be performed by a continuous process using one furnace, which facilitates automation of the manufacturing process, Moreover, since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, since the metal to which the release agent is applied is used for the temporary holding member, the pressing member, and the gap forming device, respectively, the front glass, the glass container, and the electrode portion are used. After integrating the above, there is an effect that the work of removing the temporary holding member, the holding member, and the gap forming device becomes easy.

According to a ninth aspect of the present invention, since the support is made of diatomaceous earth in the invention of the seventh aspect, there is an effect that the heat insulating property of the support can be enhanced.

A tenth aspect of the present invention is the liquid crystal display device according to the tenth aspect, wherein holes are formed near both ends of a discharge path formed in a spiral shape in a plane orthogonal to the thickness direction, and a phosphor is provided at a key position. A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, a gap forming device having a mask for covering the front surface of the glass container flange portion and the peripheral portion of the rear surface of the front glass is disposed on the temporary holding member, and the front surface is placed on the gap forming device. A gap is formed between the glass container and the front glass by placing the glass, and then an annular pressing member is placed on the front glass over the entire periphery of the front glass, and then the glass container is placed. Predetermined part on the front side of A fluorescent material is simultaneously sprayed on a predetermined portion of the rear surface of the front glass, the electrode portion is fitted in a recess formed in the support, positioned, and the temporary holding member is placed on the support to form a glass. The phosphor is baked by bringing the electrode portion into contact with the container, heating the glass container and the front glass at 525 ° C. for 15 minutes using an electric furnace, and firing the phosphor. The front glass is placed on the flange portion of the glass container by moving the glass so that the contact portion between the flange portion of the glass container and the front glass becomes 3
A pressure of 5 g / cm ² was applied, and the temperature around the front glass, the glass container, and the electrode was adjusted to 760 using the above electric furnace.
Since the front glass and the electrode portion are hermetically welded to the glass container by heating at 10 ° C. for 10 minutes, the glass container and the front glass are hermetically welded by one heating without using a frit. At the same time, the glass container and the electrode portion are hermetically welded, so that the step of applying a frit to the front glass and the step of pre-firing the frit are not required, so that equipment and work time for the frit are unnecessary, and the frit is removed. When not used, the appearance can be enhanced and the material cost can be reduced, so that there is an effect that a small-sized and low-cost flat fluorescent lamp can be provided. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container to 760 ° C. in a state where the front glass is directly combined with the front side of the glass container, so that the glass container and the front glass are uniform. Since it is locally heated and hardly deformed locally, leakage is less likely to occur, and the yield is improved as compared with the case where a gas burner is used. As a result, the cost can be reduced. In addition, since the electrode portion is positioned by the concave portion of the support, and the movement of the container is regulated by the temporary holding member, the positioning between the electrode portion and the container becomes easy, and an excessive force is applied to the electrode portion. The effect is that it can be prevented. Further, the phosphor is sprayed in a state where the gap is formed by facing the glass container and the front glass using the gap forming device, and the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask. Therefore, there is an effect that the working time can be shortened and the manufacturing cost can be reduced. In addition, the process of firing the phosphor and further welding the front glass and the electrode portion to the glass container can be performed by a continuous process using one furnace, which facilitates automation of the manufacturing process, Moreover, since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to the eleventh aspect of the present invention, the discharge path is formed near the opposite ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction, and a fluorescent material is provided at a key position. A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method for manufacturing a shaped fluorescent lamp, comprising a front glass placed on an annular support member, and a mask on the front glass for covering a peripheral portion of a rear surface of the front glass and a front surface of a flange portion of the glass container. A gap is formed between the front glass and the glass container by disposing a gap forming device and placing the glass container on the gap forming device, and then placing an annular temporary holding member in which the glass container is installed. After receiving the flange at the step formed on the temporary holding member, the phosphor is simultaneously sprayed on a predetermined portion on the front side of the glass container and a predetermined portion on the rear surface of the front glass, and the electrode portion is placed on the glass container. Positioning for After that, the holding block in which the recess for fitting the electrode portion is formed is placed on the temporary holding member, and the phosphors attached to the glass container and the front glass are simultaneously fired in a furnace to form the gap. By moving the apparatus in the furnace, the flange of the glass container is placed on the periphery of the rear surface of the front glass, and the temperature around the front glass, the glass container, and the electrode unit is set near the softening point of the glass by the furnace. Since it is heated and airtightly welded, the glass container and the front glass can be airtightly welded without using a frit,
The process of applying a frit to the conventional front glass and the process of pre-baking the frit are not required, so that equipment and work time are not required, and since the frit is not used, the appearance can be enhanced and Since the material cost can be reduced, there is an effect that a small and low-cost flat fluorescent lamp can be provided. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and hardly deformed locally, there is an effect that the yield is improved as compared with the case where a gas burner is hardly generated and the cost can be reduced as a result. Further, the phosphor is sprayed in a state where the gap is formed by facing the glass container and the front glass using the gap forming device, and the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask. Therefore, there is an effect that the working time can be shortened and the manufacturing cost can be reduced. In addition, the process of firing the phosphor and further welding the front glass and the electrode portion to the glass container can be performed by a continuous process using one furnace, which facilitates automation of the manufacturing process, Moreover, since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to a twelfth aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction, and a fluorescent substance is provided at a key position, A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, wherein a glass container is placed in an annular temporary holding member in which a container is provided, and is formed over the entire circumference of the front side of the glass container at a step formed on the front side of the temporary holding member. After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then, an annular pressing member that is weighted over the entire circumference of the front glass is placed on the front glass. The phosphor is applied to the inside of the container using the holes, the electrode portion is fitted into the recess formed in the support, positioned, and the temporary holding member is placed on the support to form the glass container. The electrode section is brought into contact with the The phosphor adhered to each of the glass container and the front glass was simultaneously fired in a furnace while circulating air in the container using the exhaust pipe, and then the temperature around the front glass, the glass container, and the electrode portion was changed to the above-described temperature. Since it is heated near the softening point of the glass by the furnace and welded in an airtight manner, the glass container and the front glass can be welded in an airtight manner without using a frit. The step of calcination is unnecessary, and equipment and work time for the calcination are not required. In addition, since no frit is used, the appearance can be improved, and the material cost can be reduced. There is an effect that a low-cost flat fluorescent lamp can be provided. In addition, since the atmosphere around the container is heated to near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container, the glass container and the front glass are hermetically welded.
Since the glass container and the front glass are uniformly heated and hardly locally deformed, the leakage is less likely to occur and the yield is improved as compared with the case where a gas burner is used, so that there is an effect that the cost can be reduced as a result. . In addition, since the phosphor is applied inside the container using the hole of the glass container,
Since the phosphor is simultaneously applied to the glass container and the front glass, the working time can be shortened and the production cost can be reduced. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one furnace, the automation of the manufacturing process is facilitated, and Since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to a thirteenth aspect of the present invention, the discharge path is formed in a plate-like shape and formed spirally in a plane orthogonal to the thickness direction, near both ends of the discharge path, and a phosphor is provided at a key position, and A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then an annular pressing member is placed on the front glass over the entire periphery of the front glass, thereby placing the glass container. A pressure of 35 g / cm ² is applied to the contact portion between the flange portion and the front glass, a phosphor is applied to the inside of the glass container using the above-mentioned hole, and the temporary holding member is placed on the support. The electrode part on the glass container Brought into contact, the temperature around the glass container and the front glass while circulating air into the container by using an exhaust pipe provided in the electrode portion in an electric furnace 52
The phosphor is baked by heating at 5 ° C. for 15 minutes, and then heated to 760 ° C. for 10 minutes by using the electric furnace at a temperature around the front glass, the glass container, and the electrode unit. Since the front glass and the electrode portion are hermetically welded, the glass container and the front glass can be hermetically welded without using a frit,
The process of applying a frit to the conventional front glass and the process of pre-baking the frit are not required, so that equipment and work time are not required, and since the frit is not used, the appearance can be enhanced and Since the material cost can be reduced, there is an effect that a small and low-cost flat fluorescent lamp can be provided. Further, by heating the atmosphere around the container to 760 ° C. in a state where the front glass is directly combined with the front side of the glass container, the front glass and the electrode portion are hermetically welded to the glass container. Since the front glass is uniformly heated and hardly deformed locally, there is an effect that the leak is less likely to occur and the yield is improved as compared with the case where a gas burner is used, so that the cost can be reduced as a result. Further, since the phosphor is applied to the inside of the container using the holes of the glass container, the phosphor is applied to the glass container and the front glass at the same time, so that the working time can be shortened and the manufacturing cost can be reduced. There is an effect that reduction can be achieved. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one electric furnace, the automation of the manufacturing process is facilitated, In addition, since the furnace is shared between the firing step and the welding step, the number of electric furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to a fourteenth aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction, and a fluorescent substance is provided at a key position, A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising placing a front glass on an annular support member, placing a glass container on the front glass, and then placing an annular temporary holding member in which the glass container is to be mounted. After receiving the flange of the glass container at the step formed on the temporary holding member by placing
The phosphor is applied to the inside of the container using the above-mentioned hole of the glass container, and after the electrode portion is positioned with respect to the glass container, the holding block having the recess for fitting the electrode portion is formed on the temporary holding member. Placed, the phosphor attached to each of the glass container and the front glass is simultaneously fired in a furnace while circulating air in the container using the exhaust pipe provided in the electrode portion,
Subsequently, the temperature around the front glass, the glass container, and the electrode portion is heated to around the softening point of the glass by the above-described furnace, so that the glass container and the front glass are hermetically sealed without using a frit. It can be welded, and the process of applying frit to the conventional front glass and the process of pre-baking the frit are not required, and equipment and work time for it are unnecessary, and by not using frit,
Since the appearance can be enhanced and the material cost can be reduced, there is an effect that a small and low-cost flat fluorescent lamp can be provided. Also,
By heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container, the glass container and the front glass are hermetically welded. Since it is uniformly heated and hardly deformed locally, there is an effect that the yield is improved as compared with the case where a gas burner is hardly generated and the cost can be reduced as a result.
Further, since the phosphor is applied to the inside of the container using the holes of the glass container, the phosphor is applied to the glass container and the front glass at the same time, so that the working time can be shortened and the manufacturing cost can be reduced. There is an effect that reduction can be achieved. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one furnace, the automation of the manufacturing process is facilitated, and Since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

According to a fifteenth aspect of the present invention, in the second aspect of the present invention, the electrode portion is welded to the glass container after the above-mentioned welding step, so that there is an effect that the electrode portion and the glass container are easily welded.

According to a sixteenth aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane orthogonal to the thickness direction, and a fluorescent material is provided at a key position, A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, a gap forming device having a mask for covering the front surface of the glass container flange portion and the peripheral portion of the rear surface of the front glass is disposed on the temporary holding member, and the front surface is placed on the gap forming device. A gap is formed between the glass container and the front glass by placing the glass, and then an annular pressing member is placed on the front glass over the entire periphery of the front glass, and then the glass container is placed. Predetermined part on the front side of And simultaneously spraying the phosphor on a predetermined portion of the rear surface of the front glass, simultaneously firing the phosphor attached to the glass container and the front glass in a furnace, and moving the gap forming device in the furnace. The front glass is placed on the flange of the glass container, and the front glass and the glass container are hermetically welded by heating the temperature around the front glass and the glass container to around the softening point of the glass by the furnace, and thereafter. In addition, since the electrode portion is brought into contact with the glass container and the glass container and the electrode portion are heated and welded, the conventional process of applying a frit to the front glass and the process of temporarily firing the frit become unnecessary, and equipment for that purpose is provided. In addition, since no work time is required, and since no frit is used, the appearance can be improved and the material cost can be reduced. In an effect that it is possible to provide a low-cost flat fluorescent lamp. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and hardly deformed locally, there is an effect that the yield is improved as compared with the case where a gas burner is hardly generated and the cost can be reduced as a result. Further, the phosphor is sprayed in a state where the glass container and the front glass are opposed to each other using a gap forming device to form a gap, and the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask. Therefore, the phosphor can be sprayed on the glass container and the front glass at the same time, so that the operation time can be shortened and the production cost can be reduced. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one furnace, the automation of the manufacturing process is facilitated, and Since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

The invention according to a seventeenth aspect is characterized in that a hole is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane orthogonal to the thickness direction, and a phosphor is provided at a key position, and A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, a gap forming device having a mask for covering the front surface of the glass container flange portion and the peripheral portion of the rear surface of the front glass is disposed on the temporary holding member, and the front surface is placed on the gap forming device. A gap is formed between the glass container and the front glass by placing the glass, and then an annular pressing member is placed on the front glass over the entire periphery of the front glass, and then the glass container is placed. Predetermined part on the front side of The phosphor is simultaneously sprayed on a predetermined portion on the rear surface of the front glass and the temperature around the glass container and the front glass is set to 525 ° C. using an electric furnace, and the phosphor is baked by heating for 15 minutes, thereby forming the gap. By placing the front glass on the flange of the glass container by moving the apparatus in the electric furnace, a pressure of 35 g / cm ² was applied to the contact portion between the flange of the glass container and the front glass, Subsequently, the temperature around the front glass and the glass container is heated to 760 ° C. using the above-described electric furnace for 10 minutes so that the front glass and the glass container are hermetically welded. Thereafter, the electrode portion is applied to the glass container. The glass container and the electrode portion are welded by heating using a gas burner, so that the glass container and the front glass can be hermetically welded without using a frit. The step of applying a frit to the conventional front glass and the step of pre-firing the frit become unnecessary, and equipment and work time for the step become unnecessary, and, furthermore, since no frit is used,
Since the appearance can be enhanced and the material cost can be reduced, there is an effect that a small and low-cost flat fluorescent lamp can be provided. Also,
Since the glass container and the front glass are opposed to each other using a gap forming device to form a gap and the phosphor is sprayed in a state where the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask, The phosphor can be sprayed on the glass container and the front glass at the same time, so that the working time can be shortened and the production cost can be reduced. In addition, since a process of firing the phosphor and further welding the glass container and the front glass can be performed by a continuous process using one electric furnace,
The automation of the manufacturing process is facilitated, and the fact that the furnace is shared between the firing step and the welding step reduces the number of furnaces required for manufacturing, and has the effect of reducing the installation area of equipment. is there. Further, the glass container and the front glass are hermetically welded by heating the atmosphere around the container to 760 ° C. in an electric furnace in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and hardly deformed locally, there is an effect that the yield is improved as compared with the case where a gas burner is hardly generated and the cost can be reduced as a result. In addition, since the electrode portion and the glass container are welded after the glass container and the front glass are integrated, there is an effect that welding between the glass container and the electrode portion is facilitated.

According to the eighteenth aspect of the present invention, the discharge path is formed near the opposite ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction. A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method for manufacturing a shaped fluorescent lamp, comprising a front glass placed on an annular support member, and a mask on the front glass for covering a peripheral portion of a rear surface of the front glass and a front surface of a flange portion of the glass container. A gap is formed between the front glass and the glass container by disposing a gap forming device and placing the glass container on the gap forming device, and then placing an annular temporary holding member in which the glass container is installed. After receiving the flange at the step formed on the temporary holding member, the phosphor is simultaneously sprayed on a predetermined portion on the front side of the glass container and a predetermined portion on the rear surface of the front glass, and the glass container and the front glass respectively. To The attached phosphors are simultaneously fired in a furnace, and the gap forming device is moved in the furnace so that the flange of the glass container is placed on the periphery of the rear surface of the front glass. By heating the ambient temperature around the softening point of the glass by the furnace, the front glass and the glass container are hermetically welded, and then the electrode portion is brought into contact with the glass container, and the glass container and the electrode portion are brought into contact with each other. Since it is heated and welded, the conventional process of applying a frit to the front glass and the process of pre-firing the frit are not required, and equipment and work time for the process are not required.Moreover, since no frit is used, Since the appearance can be enhanced and the material cost can be reduced, there is an effect that a small and low-cost flat fluorescent lamp can be provided. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and hardly deformed locally, there is an effect that the yield is improved as compared with the case where a gas burner is hardly generated and the cost can be reduced as a result. Further, the phosphor is sprayed in a state where the glass container and the front glass are opposed to each other using a gap forming device to form a gap, and the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass are covered with a mask. Therefore, the phosphor can be sprayed on the glass container and the front glass at the same time, so that the operation time can be shortened and the production cost can be reduced. In addition, since the phosphor is baked, and then the process of fusing the glass container and the front glass can be performed by a continuous process using one furnace, the automation of the manufacturing process is facilitated, and Since the furnace is shared between the firing step and the welding step, the number of furnaces required for manufacturing is reduced, and the installation area of the equipment can be reduced.

The invention according to claim 19 is characterized in that a hole is formed in the vicinity of both ends of a discharge path which is flat and is formed in a spiral shape in a plane perpendicular to the thickness direction, and a phosphor is provided at a key position, A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then, an annular pressing member that is weighted over the entire circumference of the front glass is placed on the front glass. The phosphor is applied to the inside of the container using the holes, and the phosphor adhered to each of the glass container and the front glass is simultaneously fired in a furnace while circulating the air inside the container using the holes of the glass container. Followed by the front gala And by heating the temperature around the glass container to the vicinity of the softening point of the glass by the above-mentioned furnace, the front glass and the glass container are welded in an airtight manner, and thereafter, the electrode portion is brought into contact with the glass container, and the glass container and Since the electrode part is heated and welded, the step of applying a frit to the front glass and the step of pre-baking the frit are unnecessary, so that equipment and work time for the frit are not required, and the frit is used. By not having such a structure, the appearance can be enhanced and the material cost can be reduced. Therefore, there is an effect that a small and low-cost flat fluorescent lamp can be provided. Further, since the phosphor is applied to the inside of the container using the holes of the glass container, the phosphor is applied to the glass container and the front glass at the same time, so that the working time can be shortened and the manufacturing cost can be reduced. There is an effect that reduction can be achieved. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and hardly deformed locally, there is an effect that the yield is improved as compared with the case where a gas burner is hardly generated and the cost can be reduced as a result. In addition, since the electrode portion and the glass container are welded after the glass container and the front glass are integrated, there is an effect that welding between the glass container and the electrode portion is facilitated.

In the twentieth aspect of the present invention, the discharge path is formed in the vicinity of both ends of a discharge path which is flat and spirally formed in a plane orthogonal to the thickness direction, and a fluorescent material is provided at an important position, A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate including a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a shaped fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which a container is housed; and forming a step formed on the front side of the temporary holding member over the entire circumference of the front side of the glass container. After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then an annular pressing member is placed on the front glass over the entire periphery of the front glass, thereby placing the glass container. A pressure of 35 g / cm ² is applied to the contact portion between the flange portion and the front glass, a phosphor is applied to the inside of the container using the above-mentioned hole of the glass container, and the inside of the container is used for the above-mentioned hole of the glass container. Circulating air through the glass The phosphor is fired by heating the surroundings of the vessel and the front glass to 525 ° C. for 15 minutes using an electric furnace, and then the temperature around the front glass and the glass container is raised to 760 ° C. using the electric furnace. By heating for 10 minutes, the front glass and the glass container are hermetically welded, and then the electrode portion is brought into contact with the glass container, and the glass container and the electrode portion are welded by heating using a gas burner. Therefore, the conventional process of applying a frit to the front glass and the process of pre-firing the frit are not required, so that equipment and work time are not required, and the appearance can be enhanced by using no frit. Since it is possible to reduce the material cost, it is possible to provide a small and low-cost flat fluorescent lamp. . Further, since the phosphor is applied to the inside of the container using the holes of the glass container, the phosphor is applied to the glass container and the front glass at the same time, so that the working time can be shortened and the manufacturing cost can be reduced. There is an effect that reduction can be achieved.
In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container to 760 ° C. in a state where the front glass is directly combined with the front side of the glass container, so that the glass container and the front glass are uniform. Since it is locally heated and hardly deformed locally, leakage is less likely to occur, and the yield is improved as compared with the case where a gas burner is used. As a result, the cost can be reduced. In addition, since the electrode portion and the glass container are welded after the glass container and the front glass are integrated, there is an effect that welding between the glass container and the electrode portion is facilitated.

According to a twenty-first aspect of the present invention, the discharge path is formed near the opposite ends of a discharge path which is flat and spirally formed in a plane perpendicular to the thickness direction, and a fluorescent material is provided at an important position. A container that takes out light from the front side with one side in the direction as the front surface, two electrodes disposed near both ends of the discharge path, and a pair of glass attached to the rear surface side of the container and integrally including the electrodes. Comprising an electrode portion of
A flat plate composed of a glass container made of glass provided with a spiral groove forming the discharge path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method for manufacturing a shaped fluorescent lamp, comprising placing a front glass on an annular support member, placing a glass container on the front glass, and then placing an annular temporary holding member in which the glass container is provided. After receiving the flange at the step formed on the temporary holding member, the phosphor is applied to the inside of the container using the hole of the glass container, and the phosphor adhered to each of the glass container and the front glass is heated by the furnace. Simultaneously firing in the glass, and then heating the temperature around the front glass and the glass container to near the softening point of the glass by the above-mentioned furnace to hermetically weld the front glass and the glass container, and then to the glass container electrode The frit is applied to the glass container and the electrode is heated and welded, so that the process of applying frit to the front glass and the process of pre-baking the frit are unnecessary, and the equipment and work time for the frit are unnecessary. Moreover, since no frit is used, the appearance can be enhanced and the material cost can be reduced, so that there is an effect that a small and low-cost flat fluorescent lamp can be provided. Further, since the phosphor is applied to the inside of the container using the holes of the glass container, the phosphor is applied to the glass container and the front glass at the same time, so that the working time can be shortened and the manufacturing cost can be reduced. There is an effect that reduction can be achieved. In addition, the glass container and the front glass are hermetically welded by heating the atmosphere around the container near the softening point of the glass in a state where the front glass is directly combined with the front side of the glass container. Since the glass is uniformly heated and hardly deformed locally, there is an effect that the yield is improved as compared with the case where a gas burner is hardly generated and the cost can be reduced as a result. In addition, since the electrode portion and the glass container are welded after the glass container and the front glass are integrated, there is an effect that welding between the glass container and the electrode portion is facilitated.

According to a twenty-second aspect of the present invention, in the eighteenth, nineteenth, or twenty-first aspect, the glass container and the electrode are welded to each other by heating using a gas burner. Can be easily welded.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a first embodiment.

FIG. 2 is a schematic plan view of the same.

FIG. 3 is an explanatory diagram of a manufacturing method according to the embodiment.

FIG. 4 is a cross-sectional view of a main process for explaining the manufacturing method of the above.

FIGS. 5A and 5B show a gap forming device used in the above, wherein FIG. 5A is a perspective view and FIG. 5B is a front view.

FIG. 6 is a cross-sectional view of a main process for describing the manufacturing method same as above.

FIG. 7 is an explanatory diagram of a heating device used in the above manufacturing method.

FIG. 8 is an explanatory diagram of a temperature distribution of the electric furnace according to the first embodiment.

FIG. 9 is an explanatory diagram of the manufacturing method of the above.

FIG. 10 is a main process sectional view for explaining the manufacturing method in the second embodiment.

FIG. 11 is an explanatory diagram of the manufacturing method of the third embodiment.

FIG. 12 is a main process sectional view for explaining the manufacturing method of the above.

FIG. 13 is a main process sectional view for explaining the manufacturing method of the above.

FIG. 14 is a main process sectional view for explaining the manufacturing method in the fourth embodiment.

FIG. 15 is a schematic sectional view showing a conventional example.

FIG. 16 is a perspective view of a main part of the above.

FIG. 17 is a sectional view of a main part of the above.

FIG. 18 is an enlarged view of a main part of the above.

FIG. 19 is an explanatory diagram of a main part of the above.

FIG. 20 is an explanatory diagram of the manufacturing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Discharge path 2 Glass container 3 Front glass 4 Tube 5 Stem 6 Lead wire 7 Electrode 21 Hole A Container D Electrode part

Continuation of the front page (72) Inventor Wataru Noda 1048 Odakadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Works, Ltd.

Claims (22)

[Claims] A container having a flat discharge path formed in a spiral shape in a plane orthogonal to the thickness direction and having light taken out from the front side with one surface in the thickness direction as a front face; And two electrodes disposed near both ends,
The container is a glass container made of glass on which a spiral groove forming the discharge path is provided on the front side and a phosphor is attached, and a glass container made of glass on which a phosphor is attached on the back side. A flat fluorescent plate comprising: a flat front glass that is hermetically welded by heating an atmosphere around a container near a softening point of the glass in a state of being directly combined with the front side. lamp. 2. A flat plate-shaped discharge path formed in a spiral shape in a plane orthogonal to the thickness direction, holes are formed near both ends, and a phosphor is provided at a key point. A container for taking out light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes. A flat fluorescent plate composed of a glass container made of glass provided with a spiral groove forming a path on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method for manufacturing a lamp, comprising: a spraying step of spraying a phosphor on a predetermined portion on a front side of a glass container and a predetermined portion on a rear surface of the front glass with the front side of the glass container and the rear surface of the front glass facing each other; Container and front glass A glass container and a front glass by heating the atmosphere around the container to a temperature near the softening point of the glass in a state where the front glass is directly combined with at least the front side of the glass container. And a welding step in which the firing step and the welding step are performed in a single furnace. 3. In the welding step, the atmosphere around the container is heated to near the softening point of the glass in a state where the front glass is directly combined with the front surface of the glass container and the electrode portion is directly combined with the rear surface of the glass container. 3. The method according to claim 2, wherein the glass container and the front glass are hermetically welded and the glass container and the electrode portion are hermetically welded. 4. The method according to claim 2, wherein the front glass and the glass container are each made of soft glass. 5. The method according to claim 4, wherein the welding step is performed at a temperature near the softening point of the soft glass. 6. The welding step includes applying a pressure of 10 g / cm ² to 50 g / cm ^{2 in} the vicinity of the contact portion between the glass container and the front glass and in the vicinity of the contact portion between the glass container and the electrode portion. 4. Heating is performed by using
A manufacturing method of the flat fluorescent lamp according to the above. 7. A flat plate-shaped discharge path which is formed in a spiral shape in a plane orthogonal to the thickness direction, has holes formed near both ends thereof, and a phosphor is provided at a key position, and the one surface in the thickness direction is a front surface. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear side of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat fluorescent lamp comprising a glass container in an annular temporary holding member in which the container is housed, and a step formed on the front side of the temporary holding member and a step formed on the front side of the glass container. Tsuba formed all around After receiving the portion, a gap forming device provided with a mask for covering the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass on the temporary holding member, and the front glass is placed on the gap forming device. A gap is formed between the glass container and the front glass by placing the glass container, and then an annular pressing member that is loaded on the front glass over the entire periphery of the front glass is placed. At the same time, a phosphor is sprayed on a predetermined portion on the side and a predetermined portion on the rear surface of the front glass, and the electrode portion is fitted and positioned in a recess formed in the support, and the temporary holding member is placed on the support. The electrode part is brought into contact with the glass container by doing, and the phosphor adhered to each of the glass container and the front glass is simultaneously fired in a furnace, and the gap forming device is moved in the furnace to form the glass container. Front glass placed on the collar And, flat fluorescent lamp manufacturing method of which is characterized in that the ambient temperature of the front glass and the glass container and the electrode portions are heated to near the softening point of the glass by the furnace hermetically welded. 8. The method for manufacturing a flat fluorescent lamp according to claim 7, wherein the temporary holding member, the holding member, and the gap forming device each use a metal coated with a release agent. 9. The method according to claim 7, wherein the support is made of diatomaceous earth. 10. A flat plate-shaped discharge path which is formed in a spiral shape in a plane orthogonal to the thickness direction, has holes formed near both ends thereof, and a phosphor is provided at a key position. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear side of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat fluorescent lamp comprising a glass container in an annular temporary holding member in which the container is housed, and a step formed on the front side of the temporary holding member and a step formed on the front side of the glass container. Formed all around After receiving the flange portion, a gap forming device including a mask for covering the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass is disposed on the temporary holding member, and the front glass is placed on the gap forming device. To form a gap between the glass container and the front glass, and then, on the front glass, a ring-shaped pressing member is placed over the entire periphery of the front glass. A phosphor is simultaneously sprayed on a predetermined portion on the front side and a predetermined portion on the rear surface of the front glass, the electrode portion is fitted in a recess formed in the support and positioned, and the temporary holding member is placed on the support. The electrode portion is brought into contact with the glass container by placing the glass container, and the temperature around the glass container and the front glass is set to 525 ° C. by using an electric furnace, and 1
The phosphor is baked by heating for 5 minutes, the gap forming device is moved in the electric furnace, and the front glass is placed on the flange of the glass container. A pressure of 35 g / cm ² is applied to the abutting portion of the glass container, and the temperature around the front glass, the glass container and the electrode portion is set to 760 ° C. using the above electric furnace for 10 minutes, thereby heating the front glass against the glass container. And a method for manufacturing a flat fluorescent lamp, wherein the electrode portion is hermetically welded. 11. A flat plate-shaped discharge path formed in a spiral shape in a plane orthogonal to the thickness direction, holes are formed near both ends of the discharge path, and phosphors are provided at important places. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear side of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method for manufacturing a flat fluorescent lamp, comprising: mounting a front glass on an annular support member, and covering a peripheral portion of a rear surface of the front glass and a front surface of a flange portion of a glass container on the front glass. Gap with a mask of A gap is formed between the front glass and the glass container by disposing the forming device and placing the glass container on the gap forming device, and then placing the annular temporary holding member in which the glass container is installed. After receiving the flange at the step formed on the temporary holding member, the phosphor is simultaneously sprayed on a predetermined portion on the front side of the glass container and a predetermined portion on the rear surface of the front glass, and the electrode portion is placed on the glass container. After positioning, the holding block in which the recess for fitting the electrode portion is formed is placed on the temporary holding member, and the phosphors attached to the glass container and the front glass are simultaneously fired in a furnace,
By moving the gap forming device in the furnace, the flange of the glass container is placed on the periphery of the rear surface of the front glass,
A method for manufacturing a flat-type fluorescent lamp, characterized in that the temperature around the front glass, the glass container, and the electrode portion is heated to near the softening point of the glass by the above-mentioned furnace and welded hermetically. 12. A flat plate-shaped discharge path formed in a spiral shape in a plane orthogonal to the thickness direction, holes are formed near both ends, and a phosphor is provided at a key position, and the one surface in the thickness direction is a front surface. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear surface of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which the container is housed; and forming a step formed on the front side of the temporary holding member on the front side of the glass container. Formed all around After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then an annular pressing member that is placed over the entire circumference of the front glass is placed on the front glass, and the above-described hole of the glass container is placed. The phosphor is applied to the inside of the container by using, and the electrode portion is fitted in the recess formed in the support, positioned, and the temporary holding member is placed on the support, whereby the electrode is applied to the glass container. The phosphor adhered to each of the glass container and the front glass is simultaneously fired in a furnace while circulating air in the container by using the exhaust pipe provided in the electrode portion, and then the front glass is contacted. And a method of manufacturing the flat fluorescent lamp, wherein the temperature around the glass container and the electrode portion is heated to around the softening point of the glass by the above-mentioned furnace to be welded in an airtight manner. 13. A flat plate-shaped discharge path formed in a spiral shape in a plane orthogonal to the thickness direction, holes are formed near both ends, and a phosphor is provided at a key point. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear side of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat fluorescent lamp comprising a glass container in an annular temporary holding member in which the container is housed, and a step formed on the front side of the temporary holding member and a step formed on the front side of the glass container. Formed all around After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then an annular pressing member that is weighted over the entire circumference of the front glass portion is placed on the front glass, whereby the flange of the glass container is placed. A pressure of 35 g / cm ² is applied to the contact portion between the part and the front glass, a phosphor is applied to the inside of the glass container using the hole, and the temporary holding member is placed on the support. Thereby, the electrode portion is brought into contact with the glass container, and the temperature around the glass container and the front glass is set to 525 ° C. using an electric furnace while circulating air in the container using an exhaust pipe provided in the electrode portion. The phosphor is baked by heating for 15 minutes, and then the temperature around the front glass, the glass container, and the electrode portion is set to 760 ° C. using the electric furnace, and the glass is heated for 10 minutes, so that the glass container is heated. And electrodes Method of manufacturing a flat fluorescent lamp, characterized in that the hermetically welded. 14. A flat plate-shaped discharge path which is formed in a spiral shape in a plane perpendicular to the thickness direction, has holes formed near both ends thereof, and a phosphor is provided at a key position. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear side of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat fluorescent lamp, comprising: mounting a front glass on an annular support member, then mounting a glass container on the front glass, and then an annular shape in which the glass container is installed. Place the temporary holding member After receiving the flange portion of the glass container at the step formed on the temporary holding member, the phosphor was applied to the inside of the container using the hole of the glass container, and the electrode portion was positioned with respect to the glass container. Thereafter, the holding block having the recess for fitting the electrode portion is placed on the temporary holding member, and the glass container and the front surface are circulated while circulating the air in the container using the exhaust pipe provided in the electrode portion. The phosphor adhered to each glass is fired simultaneously in a furnace, and then the temperature around the front glass, the glass container and the electrodes is heated to near the softening point of the glass by the above-mentioned furnace, and the glass is welded in an airtight manner. A method for manufacturing a flat fluorescent lamp, which is characterized by the following. 15. The method according to claim 2, wherein the electrode portion is welded to the glass container after the welding step. 16. A flat plate-shaped discharge path formed in a spiral shape in a plane orthogonal to the thickness direction, holes are formed near both ends of the discharge path, and phosphors are provided at important places. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear side of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat fluorescent lamp comprising a glass container in an annular temporary holding member in which the container is housed, and a step formed on the front side of the temporary holding member and a step formed on the front side of the glass container. Formed all around After receiving the flange portion, a gap forming device including a mask for covering the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass is disposed on the temporary holding member, and the front glass is placed on the gap forming device. To form a gap between the glass container and the front glass, and then, on the front glass, a ring-shaped pressing member is placed over the entire periphery of the front glass. The phosphor is simultaneously sprayed on a predetermined portion on the front side and a predetermined portion on the rear surface of the front glass, and the phosphor adhered to each of the glass container and the front glass is simultaneously fired in a furnace. The front glass is placed on the flange of the glass container by moving the glass and the temperature around the front glass and the glass container is heated to near the softening point of the glass by the above-mentioned furnace, so that the front glass and the glass container are airtight. Welded to, then, is brought into contact with the electrode portions in a glass container, flat fluorescent lamp manufacturing method of which is characterized by welding by heating the glass container and the electrode portion. 17. A flat plate-shaped discharge path formed in a plane perpendicular to the thickness direction and formed near the opposite ends of a spirally formed discharge path, and a phosphor is provided at an important position. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear side of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat fluorescent lamp comprising a glass container in an annular temporary holding member in which the container is housed, and a step formed on the front side of the temporary holding member and a step formed on the front side of the glass container. Formed all around After receiving the flange portion, a gap forming device including a mask for covering the front surface of the flange portion of the glass container and the peripheral portion of the rear surface of the front glass is disposed on the temporary holding member, and the front glass is placed on the gap forming device. To form a gap between the glass container and the front glass, and then, on the front glass, a ring-shaped pressing member is placed over the entire periphery of the front glass. The phosphor is sprayed simultaneously on a predetermined portion on the front side and a predetermined portion on the rear surface of the front glass, and the temperature around the glass container and the front glass is set to 525 ° C. using an electric furnace, and the phosphor is baked by heating for 15 minutes. Then, by moving the gap forming device in the electric furnace, the front glass is placed on the flange of the glass container, so that the contact portion between the flange of the glass container and the front glass has 35 g / cm ² . Mark pressure Then, the temperature around the front glass and the glass container is heated to 760 ° C. using the electric furnace for 10 minutes, whereby the front glass and the glass container are hermetically welded. A glass container and an electrode portion are welded by heating using a gas burner. 18. A flat plate-shaped discharge path which is formed in a spiral shape in a plane orthogonal to the thickness direction, has holes formed near both ends thereof, and a phosphor is provided at a key position, and the one surface in the thickness direction is a front surface. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear side of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method for manufacturing a flat fluorescent lamp, comprising: mounting a front glass on an annular support member, and covering a peripheral portion of a rear surface of the front glass and a front surface of a flange portion of a glass container on the front glass. Gap with a mask of A gap is formed between the front glass and the glass container by disposing the forming device and placing the glass container on the gap forming device, and then placing the annular temporary holding member in which the glass container is installed. After receiving the flange at the step formed on the temporary holding member, the phosphor is simultaneously sprayed on a predetermined portion on the front side of the glass container and a predetermined portion on the rear surface of the front glass, and applied to the glass container and the front glass respectively. The attached phosphors are fired simultaneously in a furnace, and the gap forming device is moved in the furnace so that the flange of the glass container is placed on the periphery of the rear surface of the front glass. By heating the ambient temperature around the softening point of the glass by the furnace, the front glass and the glass container are hermetically welded, and then the electrode portion is brought into contact with the glass container, and the glass container and the electrode portion are brought into contact with each other. Heating Flat fluorescent lamp manufacturing method of which is characterized by welding. 19. A flat plate-shaped discharge path formed spirally in a plane orthogonal to the thickness direction, holes are formed near both ends, and phosphors are provided at important places, and the one surface in the thickness direction is a front surface. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear side of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat fluorescent lamp, comprising: placing a glass container in an annular temporary holding member in which the container is housed; and forming a step formed on the front side of the temporary holding member on the front side of the glass container. Formed all around After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then an annular pressing member is placed on the front glass so as to apply a weight over the entire periphery of the front glass portion. A phosphor is applied to the inside of the container by using, and the phosphor adhered to each of the glass container and the front glass is simultaneously baked in a furnace while circulating air in the container by using the hole of the glass container, Subsequently, the front glass and the glass container are hermetically welded by heating the temperature around the front glass and the glass container to around the softening point of the glass by the above-mentioned furnace, and then the electrode portion is brought into contact with the glass container. A method for manufacturing a flat fluorescent lamp, comprising heating and welding a glass container and an electrode portion. 20. A flat plate-shaped discharge path formed spirally in a plane orthogonal to the thickness direction, holes are formed near both ends of the discharge path, and phosphors are provided at important points. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear side of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat fluorescent lamp comprising a glass container in an annular temporary holding member in which the container is housed, and a step formed on the front side of the temporary holding member and a step formed on the front side of the glass container. Formed all around After receiving the flange portion, the front glass is placed on the flange portion of the glass container, and then an annular pressing member that is weighted over the entire circumference of the front glass portion is placed on the front glass, whereby the flange of the glass container is placed. A pressure of 35 g / cm ² is applied to the contact portion between the portion and the front glass, a phosphor is applied to the inside of the container using the above hole of the glass container, and the inside of the container is applied to the above hole of the glass container. While circulating air, the temperature around the glass container and the front glass was adjusted using an electric furnace.
The phosphor is fired by heating at 5 ° C. for 15 minutes, and then the front glass and the glass container are heated by heating the temperature around the front glass and the glass container to 760 ° C. for 10 minutes using the electric furnace. Airtightly welded,
Thereafter, the electrode portion is brought into contact with the glass container, and the glass container and the electrode portion are welded by heating using a gas burner. 21. A flat plate-shaped discharge path formed in a spiral shape in a plane orthogonal to the thickness direction, holes are formed near both ends of the discharge path, and phosphors are provided at important places. A container for extracting light from the front side, two electrodes disposed near both ends of the discharge path, and a pair of electrode portions made of glass integrally provided with the electrodes attached to the rear side of the container. A glass container made of glass in which a spiral groove forming the discharge path is provided on the front side, and a flat front glass made of glass and hermetically welded to the front side of the glass container. A method of manufacturing a flat fluorescent lamp, comprising: placing a front glass on an annular support member, placing a glass container on the front glass, and then temporarily holding the glass container inside. To put the members After receiving the flange at the step formed on the temporary holding member, the phosphor is applied to the inside of the container using the above hole of the glass container, and the phosphor adhered to each of the glass container and the front glass is cooled by the furnace. In the same time, the front glass and the glass container are air-tightly welded by heating the temperature around the front glass and the glass container to near the softening point of the glass by the above-mentioned furnace, and then the electrode is attached to the glass container. A glass container and an electrode part are heated and welded to each other by bringing the parts into contact with each other. 22. The method of manufacturing a flat fluorescent lamp according to claim 18, wherein the glass container and the electrode portion are welded by heating using a gas burner.