JPH1012133A - High pressure steam discharge lamp - Google Patents

Abstract

(57) [Summary] [PROBLEMS] A lamp using a quartz glass for an outer tube causes a chemical reaction with a salt or the like in human sweat and causes discoloration or devitrification, so that handling with bare hands is difficult. Mounting and removing the lamp by a robot has a problem that the lamp may be damaged. SOLUTION: The high-pressure vapor discharge lamp of the present invention incorporates an arc tube made of a translucent alumina ceramic tube or a quartz tube into a quartz outer tube having a cap at both ends, and uses a FC2 type cap. Attach the cylindrical metal terminal rod to the base terminal plate. Further, the cylindrical metal terminal rod is attached to the base terminal plate by screwing, and the gap between the cylindrical metal terminal rod and the base terminal plate is fixed by soldering with a solder having a melting point of 240 ° C. or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-necked high-pressure vapor discharge lamp using a quartz outer tube.

[0002]

2. Description of the Related Art Conventional high-pressure sodium lamps and metal halide lamps in the form of double caps have a structure as shown in FIGS. An arc tube 10 is incorporated in an outer tube 2 made of quartz, and both ends of the outer tube are sealed with a pinch seal via a molybdenum foil 11, and the inside of the outer tube is kept in a high vacuum or an inert gas atmosphere. .

[0003] The end caps typically have 12 FC2 bases, 70, 1 for 250 and 400 watt class lamps.
Thirteen RX7s bases are used for 50 watt class lamps.

[0004] These lamps differ from lamps having a base called a screw base such as E27 or E39 in a method of fixing to a socket. The lamp using the FC2 type base is fixed by inserting base terminals at both ends of the lamp into sockets. In the lamp using the RX7s base, the base of the lamp is pressed and fixed from both sides by the spring of the socket. Therefore, while the lamp using the RX7s base can be mounted on the socket in any direction, the lamp using the FC2 base is limited to one-way mounting.

[0005]

These lamps use quartz glass for the outer tube in consideration of heat resistance in order to make the lamp compact. Quartz glass has a drawback that it is difficult to handle with bare hands because the quartz glass undergoes a chemical reaction with, for example, salts in human sweat at the temperature during lamp operation, causing discoloration and devitrification. Therefore, when attaching or detaching the lamp, it is necessary to wear gloves, etc., so that the glass part of the lamp is not directly touched with bare hands.

In the case of a lamp using the FC2 type base,
Because of the plug-in fixation, it is also possible, for example, to attach and remove the lamp indirectly using a robot. Using this method, the lamp can be handled without soiling. Furthermore, these lamps can be used in dangerous places where humans cannot enter. However, this method also has disadvantages. In order to firmly fix the lamp, a large force is applied to the lamp when the lamp is inserted into the socket, and the lamp may be damaged when the lamp is mounted or removed. Further, since the insertion direction of the lamp is limited to one direction, it is necessary to position the lamp at the time of mounting.

[0007] In order to solve these disadvantages, a cylindrical metal terminal rod is attached to a metal terminal plate of an FC2 base. And a special socket was prepared to match this cylindrical terminal rod. In the case of this lamp, it has been found that the force applied to the lamp when the lamp is attached to and detached from the socket is much smaller than that in the case of the above-described ordinary lamp. Therefore, attachment and detachment of a lamp using a robot can be easily performed. Of course, damage to the lamp can be prevented, and the lamp can be mounted in any direction.

SUMMARY OF THE INVENTION The present invention solves the problem of installing and removing a lamp in a metal vapor discharge lamp such as a high-pressure sodium lamp or a metal halide lamp of a double-base type. It is characterized by a stick attached, so that the lamp can be easily attached and detached using a robot.

[0009]

The high-pressure vapor discharge lamp of the present invention has an FC2 tube having a light-transmitting alumina ceramic tube or a quartz tube incorporated in an outer tube made of quartz having both ends. In a lamp using a shaped base, cylindrical metal terminal rods are attached to base terminals at both ends. Also,
The cylindrical metal terminal rod is attached to the base terminal plate by screwing and fixed, and the gap between the cylindrical metal terminal rod and the base terminal plate is further fixed by soldering having a melting point of 240 ° C. or less.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A double-base high-pressure vapor discharge lamp according to the present invention is such that mounting and dismounting of a lamp can be easily performed using a robot. It is characterized by a stick attached. Also, a special socket adapted to the cylindrical terminal rod is used. By doing so, the force on the lamp required to fix it to the socket can be significantly reduced, preventing damage to the lamp when installing and removing the lamp, and allowing installation in any direction It is possible to obtain a lamp which has been set to a predetermined value.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.

FIG. 1 shows the structure of a lamp used in an experiment, in which a cylindrical metal terminal rod 6 is attached to a terminal plate 4 at both ends of a double-necked high-pressure sodium lamp.
The light emitting tube 1 in the quartz outer tube 2 is a translucent alumina ceramic tube having an inner diameter of 8 mm and a total length of 120 mm. Reference numeral 3 denotes a base insulator, and reference numeral 5 denotes a mounting screw.

FIG. 2 shows a cylindrical metal terminal rod 6, in which a cut groove is provided at one end, and a total of three screw holes are formed in the cut groove portion. The diameter of the cylindrical metal terminal rod 6 is 10 mm, the total length is 40 mm, and the cut length is 9 m.
m, the groove width is 2.5 mm.

FIG. 3 is an enlarged view of a mounting portion of the cylindrical metal terminal rod 6. (A) is a diagram viewed from a direction perpendicular to the surface of the base terminal board 4, and (b) is a view showing the base terminal board 4.
FIG. 5 is a view seen from a direction horizontal to the surface of FIG. The cylindrical metal terminal rod 6 has a cut groove inserted into the base terminal plate 4 of the lamp, and is fixed by M2.3 screwing. This screw fastening has several advantages. One is that the conventional lamp can be used without any processing.
The second is that it is easily fixed by screws. Also, because the lamp is easy to remove, when the lamp becomes defective, only the cylindrical metal terminal rod can be removed and attached to a new lamp.

Although sufficient fixation is possible by such screwing, the gap between the base terminal plate and the cylindrical metal terminal rod is soldered in consideration of the occurrence of loosening of the screw in the event of vibration or the like. It is fixed by attaching. The solder used had a melting point of about 240 ° C. The reason for this is that if the temperature becomes higher than this, the terminal plate of the base, the cylindrical metal terminal rod,
Further, the Mo wire connecting the terminal plate and the Mo foil is oxidized during soldering. Although there is a method of preventing oxidation by purging an inert gas even at a higher temperature than this, it is troublesome and costly.

A test was conducted in which the lamp thus prepared was attached to and detached from a socket using a robot as shown in FIGS. This figure shows the process of attaching and detaching the lamp held by the robot arm 7 to the socket 8. In the figure, the pinch seal portion 9 of the lamp, that is, the base terminal plate 4 is horizontal with respect to the opening of the socket 8, but since the fixing portion to the socket is the cylindrical metal terminal rod 6, Obviously, there is no effect on the installation. That is, by attaching the cylindrical metal terminal rod 6, positioning of the lamp with respect to the socket is not required at all.

This test has shown that the lamp can be easily and securely installed and removed from the socket. When this lamp is turned on at 400 watts, the temperature of the soldered part is about 150 ° C at the maximum.
Met. Therefore, it was found that the soldered portion was not melted by the heat when the lamp was turned on.

Next, using a 400-watt double-ended metal halide lamp, a lamp was prepared in which a cylindrical metal terminal rod was attached to both end terminal plates in the same manner as the high-pressure sodium lamp described above. And the test was performed in the same way. As a result, the lamp can be attached and detached in the same manner as in the case of the high-pressure sodium lamp, and no problems such as the detachment of the joint due to the heat during the operation of the lamp did not occur.

[0019]

As described above, according to the present invention, since the cylindrical metal terminal rods are attached to the terminal plates at both ends of the double-ended metal vapor discharge lamp, a robot can be used when installing and removing the lamp. A double-necked high-pressure vapor discharge lamp that can be attached to and detached from the socket indirectly and easily is obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a double-necked high-pressure sodium lamp used in an experiment in an embodiment of the present invention.

FIG. 2 is an enlarged view of a double-necked high-pressure sodium lamp used in an experiment in an embodiment of the present invention.

FIG. 3 is a view showing a cylindrical metal terminal rod used in an experiment in an example of the present invention.

FIG. 4 is a view of mounting a lamp by a robot viewed from a lateral direction.

FIG. 5 is a view of mounting a lamp by a robot viewed from above.

FIG. 6 is a diagram showing a conventional double-ended metal halide lamp using an RX7s-type die.

FIG. 7 is a diagram showing a conventional double-necked high-pressure sodium lamp using an RX7s-type base.

FIG. 8 is a diagram showing a conventional double-ended metal halide lamp using an FC2 type die.

FIG. 9 is a diagram showing a conventional double-necked high-pressure sodium lamp using an FC2 type base.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Translucent alumina ceramic luminous tube 2 Quartz outer tube 3 FC2 type base insulator 4 FC2 type base terminal plate 5 Screw 6 Cylindrical metal terminal rod 7 Lamp holding robot arm 8 Dedicated socket 9 Pinch seal part 10 Quartz arc tube 11 Molybdenum foil 12 FC2 type base 13 RX7s type base

Claims (3)

[Claims] 1. A lamp using an FC2 type base in which an arc tube made of a translucent alumina ceramic tube or a quartz tube is incorporated in an outer tube made of quartz having bases at both ends. A double-necked high-pressure vapor discharge lamp with a metal terminal rod attached. 2. The double-barreled high-pressure vapor discharge lamp according to claim 1, wherein the cylindrical metal terminal rod is attached to the base plate by screwing. 3. The method according to claim 1, wherein the cylindrical metal terminal rod is attached to a base terminal board by screwing and fixed, and a gap between the cylindrical metal terminal rod and the base terminal board is fixed by soldering having a melting point of 240 ° C. or less. The double-necked high-pressure vapor discharge lamp according to claim 1, characterized in that: