JPS58169754A - Producing device for bulb - Google Patents

Abstract

PURPOSE:To enable the predetermined small quantity of pellets to be easily dropped in, by placing, one by one, a pellet made of luminous material with a small diameter on the tip of a pellet-supporting member and by making said pellet to be dropped by a throwing member into a hopper serving as a passage toward the luminous tube of a discharge lamp. CONSTITUTION:The constitution is set up in such a way that pellets 3 are received in a pellt-receiving bag 2, and when pellet-supporting member 4 is moved upward, its tip supports only one pellets 3' and pushes it upward. In this case, the rubber-made pellet-receiving bag 2 is elongated, and pellets except the pellet which is supported on said tip remain intact in the pellet-receiving bag 2. Further, the pellet-supporting member 4 is raised holding a dropping member 5 intact in the relative position and rushed into a through hole 11 of a hopper 10 while supporting only one pellet 3' intact on said tip. Next, the dropping member 5 which is supported on the pellet-supporting member 4 is moved upward, the pellet 3' is dropped into the hopper 10 and thrown into a luminous tube 7 via a duct pipe 9 and an exhaust pipe 8. Consequently, in the specified ambient condition the predetermined quantity of pellet made of luminous material can be sealed into the luminous tube.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an apparatus for manufacturing a tube, and in particular to an improvement in an apparatus for introducing a luminescent material into an arc tube that is equipped with electrodes on both sides and contains a luminescent material. Regarding.

[Technical background of the invention]

High-efficiency discharge lamps with relatively high color rendering properties, such as high-pressure sodium lamps and metal halide lamps, are used for high-ceiling lighting in gymnasiums and indoor and outdoor lighting such as airport lighting. These discharge lamps have a light-transmissive envelope made of gas, etc., and have a light-emitting tube equipped with electrodes at both ends and containing a light-emitting material such as sodium iodide or indium iodide. In order to improve the luminescent color of a discharge lamp, the luminescent material is formed into a small-diameter pellet and then introduced into the arc tube through the exhaust pipe of one arc tube.

[Problems with background technology]

As described in the technical background of the invention, there is a method in which the luminescent material is formed into a small-diameter pellet shape and then introduced into the arc tube of the discharge run.

This is an effective method for encapsulating the luminescent material in the luminescent tube of the device, but the pellets of the luminescent material are small in diameter.

Moreover, it is brittle and needs to be sealed into the arc tube in a vacuum or in an atmosphere of inert gas to prevent chemical reactions such as oxidation. There were problems, which were an impediment to mass production and automation of manufacturing equipment.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned problems in the background art, and it is possible to easily enclose a predetermined amount of pellets of luminescent material, which are small in diameter and are brittle depending on the material, into an arc tube in a specific atmosphere, and can be mass-produced. and improved tubes that can automate manufacturing equipment.

For example, the object is to provide an apparatus for manufacturing discharge lamps.

[Summary of the invention]

In the present invention, when the pellet support member moves up and down in the vertical axis direction inside the pellet storage container that stores several small-diameter pellets of luminescent material, the pellets in the pellet storage container are attacked one by one at the tip of the pellet support member. This tube manufacturing apparatus has a pellet thrower which allows the above-mentioned pellets to be dropped into a hole communicating with an arc tube of a discharge lamp by means of a dropping member.

[Center of invention! I&Example]

1 to 4 are partially cutaway front views of the discharge lamp manufacturing apparatus according to an embodiment of the present invention, showing the operation of the apparatus.

The end of a rubber pellet storage bag (2) is fixed to the upper end of the inner wall of a cylindrical pellet storage container (1). The above pellet storage bag (2) K is made up of small diameter pellets (3 (
Multiple items are stored. The central bottom of the pellet storage bag (2) is perforated, and a pellet support member (4) is attached to the hole. The pellet support member (4) is movable up and down in the vertical axis direction of the pellet storage container (1). The pellet supporting member (4) has a hole formed along its central axis, and a pellet dropping member (5) is fitted into the hole so as to be slidable up and down. The pellet storage device (11 constitutes a pellet dropping base ring together with the pellet supporting member (4) and the pellet dropping member (5)).

As shown in the first diagram, a plurality of pellets (3) are placed inside a pellet storage bag (2) to which a pellet support member (4) is attached.
is stored, and the pellet support member (4) moves upward in the vertical axis direction within the pellet storage container (1) as shown in the second figure. The tip of the pellet support member (4) supports one pellet and projects upward. At this time, the rubber pellet storage bag (2) expands due to its elasticity, and the pellet support member (
The pellets other than the nine pellets supported by the tip of the pellet (4) are stored as they are in the pellet storage bag (2). Also,
At this time, the dropping member (5) fitted into the pellet supporting member (4) is located at the same relative position as shown in Fig. 1i141 with respect to the pellet supporting member (4) K on four axes with the pellet supporting member (4). There is. Further, the pellet supporting member (4) is raised to a point t holding the dropping member (5) in the same relative position as above and is moved to position 1 shown in FIG. It enters into the opening 0υ of Hoch 4, which has a conduit w (9) that communicates with the starting V (power trachea (8)).Next, as shown in Fig. 4, the pellet support member (4)
The position of 8143 is up to 1 shown in the figure, and the pellet support member (4
) is moved upwards, and is dropped into the pellet support member + 410 barrel (1 (l) in the direction of the arrow, and falls onto the inner surface of the hopper α, into the conduit (9).
The gas is then introduced into the arc tube (7) via the exhaust pipe (8) which is connected to the exhaust pipe (8). Incidentally, the arc tube (7) is electrically conductively connected to electrodes (not shown) at both ends α and ←υ, and the molybdenum metal foil A4, (la Lead wire α Teng, with
It is equipped with 93. Moreover, in FIG. 144, the pellet dropper (6) other than the pellet support member (4) is omitted.

As explained by way of an embodiment of the apparatus of the present invention, the present invention includes placing a predetermined amount of small-diameter pellets of a luminescent material on the tip of a pellet support member, and feeding the pellets into an arc tube via a hopper. Because it can be done mechanically, there is no need to do it manually, and automation is easy.1 The hopper, luminous tube, and pellet dropper shown in the figure can be placed in a vacuum such as a Pel jar or in a timed atmosphere such as an inert gas. Because the pellets can be held and operated, it is easy to prevent chemical reactions such as oxidation of the pellets, and even if the pellets are small and fragile, a predetermined amount of pellets can be placed inside the arc tube without applying force that would crush the pellets. It is possible to have pressure built in.

In addition, in the embodiment, an example is explained in which a pellet supporting member is fitted with a coaxial charging member, but the pellet charging member is not limited to the embodiment shown in the figure. Other methods may be used to introduce the pellets, such as hitting the pellets placed at the tip from the side to bring them down.

〔Effect of the invention〕

As detailed above, the present invention provides an apparatus for manufacturing an arc tube having electrodes at both ends and containing a luminescent material, including: a pellet storage device for storing small-diameter pellets of the luminescent material; The above pellets are placed one by one on the tip thereof, and the above pellets are moved up and down in the vertical axis direction in the above pellet storage container. A small, predetermined amount of a luminescent material made of a crumbly and brittle material is placed into an arc tube using a bulb manufacturing device that has a pellet dispensing member that has a communicating hole (a pellet discharging member that is disposed inward). Excellent manufacturing of tubes such as discharge lamps, which can be easily introduced and can be automated rather than manually, and can be done in a specific atmosphere, resulting in high productivity. This has the advantage of being able to provide a device.

[Brief explanation of drawings]

1 to 4 are partially cutaway front views of the apparatus for manufacturing a discharge lamp according to an embodiment of the present invention, showing the operation of the apparatus. l...Bellet storage container, 3...Pellet, 4...
Pellet support member, 5... Pellet dropping member, dan...
・Pellet dropper agent Patent attorney Noriyuki Chika (and 1 other person)

Claims (1)

[Claims] In an apparatus for manufacturing an arc tube having electrodes at both ends and containing a luminescent material, there is provided a pellet storage container for storing a plurality of small-diameter pellets of the luminescent material, and one pellet is placed at the tip of the pellet storage container. a pellet support member that can be placed and moved up and down in the vertical axis direction within the pellet storage container; and a pellet dropping member that drops the pellets placed at the tip of the pellet support member into a hopper that communicates with the light emitting sound. 1. A tube manufacturing device characterized by having a pellet dropper having: