KR830000897B1 - Displaced sealing head for continuously rotating horizontal fluorescent tube sealing device - Google Patents

Abstract

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Description

Displaced sealing head for continuously rotating horizontal fluorescent tube sealing device

1 and 2 are partial cross sectional front views of a preferred embodiment of the present invention showing a sealing head corresponding to a horizontal turret at a mount sealing position and a mounting loading position of the head.

3 is a cross sectional view of the head at two positions A and B of the head corresponding to the position of FIG.

The present invention relates to an apparatus for producing an electric light source, and more particularly to an apparatus for producing a tubular fluorescent lamp. Although the invention has broad applicability, it is of a nature that may be usefully used in combination with the invention claimed and described in US patent application Ser. No. 865,576, filed December 29, 1977.

Conventionally, the structure of a fluorescent lamp is well known. Fluorescent lamps are mass produced by a group of high-speed automatic machines.

That is, a mount mill for making a mount assembly with a stem manufacturing device, a cathode with a stem and a sealed lead in place, and a "leer" where the mount assembly is hardened by baking phosphorus on the inner wall of the tube at high temperatures. lehr), which includes a conveyor for conveying the co-lamp tube sheath through a conveyor following from an oven known as "

Known lamp sealing devices fall into two universal groups, called horizontal and vertical devices.

Sealing the mount at the end of the lamp tube in a vertical device is done in sequence.

Firstly the tube is placed vertically so that the mount is sealed at the lower end of the lamp tube and then the lamp tube is removed from the sealing device and reversed 180 ° and reinserted into the device so that the second mount is at their other end. Is sealed on. On the other hand, in a horizontal arrangement the lamp tube is placed horizontally so that the two mounts are sealed at both ends of the lamp tube at the same time.

In addition to being classified vertically and horizontally, the sealing device can be classified into an index type, an intermittent type, or a continuous operation type. It is also distinguished as a device for advancing the head supporting the lamp tube and the sealing burner. The head is here supported by an endless chain conveyor or by a pair of spaced rotating turrets rotating about a horizontal axis.

The present invention is applicable to all types of horizontal sealing devices most useful for sealing assemblies of high speed, continuous and rotating turrets with mount assemblies, ie "mount loading".

It is clear that the overall power ratio of the group of automatic fluorescent tube manufacturers is closely related to the efficiency and ratio of the mount loading. It is theoretically possible to increase the transfer ratio of the mount assembly from the mount mill to the sealing device and to increase the number of heads and the rotation rate of the turret of the sealing device, but the most important problem is to transfer the mount assembly from the conveyor Occurs in the step of loading into the sealing head.

In operation of all conventional commercial high speed equipment, the mount is mounted on two turrets, such as an end surface and a mantle surface covered with a tubular lamp shell extending from the interior of the device, ie between the heads located around the turret. It must be guided to the head of the sealing device from within the cylindrical space defined by it.

The transfer of the mount from the mount conveyor head is only effected by introducing the mount into the sealing device from the conveyor head to the sealing head in a synchronous manner by the "wasting" head. The waste head here means that some of the heads leave the tubing unloaded until the turret is rotated and the mount loading device is emptied.

Known structures for this purpose are extremely complex, for example US Pat. Nos. 2,721,422, 3,113,011 and 3,399,044. Such known devices all include a plurality of mount conveyors and transfer devices, connected cams and other controllers.

It is an object of the present invention to simplify mount loading and make it more reliable and faster to eliminate or mitigate the losses mentioned above.

Therefore, according to the present invention there is a sealing head for a horizontal sealing device of the type comprising at least a pair of sealing heads, each pair of sealing heads being enclosed at each end of a tubular fluorescent lamp shell extending between the heads. It is arranged to receive the mount assembly.

The sealing head is spaced apart at a sufficient angle from the mount sealing position where the head frame, the mount and the lamp tube are arranged on the same axis, and the mount sealing position is introduced and fixed to the mount supporting member. And a mount support member fixed to the head frame directly or indirectly by means of a connecting means which allows the mount support member to be moved at an angle between the mounted mounting positions.

Preferably, the angular movement of the mount support member between the mount loading position and the mount sealing position is generally 90 ° to the traveling direction of the head (vertical plane to the rotating turret device).

The connection between the head frame and the mount support member is also a jointed connection. The mount support member makes a reciprocating axial motion over a slide bed connected by a pair of pivot bolts with arms sequentially connected to the frame.

In a rotary turret device, preferably, the mount support member pivots from the mount sealing position to the vertical mount loading position, and the "bottom dead center" of the sealing head above the rotating turret within a relatively narrow angle range of the rotating turret. Return to the mount sealing position centering on.

The mount support member preferably has a conventional sealing burner but is not a requirement and the sealing burner may be mounted on a separate ring.

According to another feature of the invention there is a method of enclosing a mount at the end of a fluorescent lamp tube in a horizontal sealing device comprising at least one pair of sealing heads between which the lamp tube is extended, the method supporting the mount Including connecting the member to the frame of the head to move the mount support member at an angle.

That is, the mount is introduced into the mount support member at a mount loading position spaced apart with a sufficient angle from the mount sealing position and the mount sealing position on the same axis as the lamp tube, and the mount is moved to the outside of the sealing device. The mount supporting member is angularly moved by the interlocking operation between the mount supporting member and the mounting position of the mount supporting member so as to be in line with the mount loading position, and the mount supporting member catches the mount so as to seal the mount in the lamp tube.

In the preferred embodiment, when the mount support member is placed in the vertical position, the mount is able to mount the mount in the mount support member outside of the turret device, in a vertical downward direction (not inside, as in the prior art) and thus conventional The complexity mentioned can be eliminated.

What stands out from the prior art is that the mount loading conveyor is operated in an ideal mount loading manner.

That is, when the mount conveyor head is reached in a horizontal plane around the vertical axis, and the mount conveyor head reaches the vertical plane where the head with the shaft slides down, the mounting holding and conveying can be made easier than with the prior art devices (with the aid of weight if necessary) ).

The invention will now be described in detail below as an example with reference to a simplified drawing.

The accompanying drawings show in detail part of the horizontal rotation turret sealing device in the apparatus group of the fluorescent tube.

Referring to FIG. 3, the tubular fluorescent lamp shell 10 is fixed in a suitable holder (not shown) fixed to a portion of the main frame 12 of the turret which can rotate in the direction of the arrow 13. It is shown. It also shows that the mount support member is blended into the sealing head 14 of a number of similar sealing heads 14 spaced around each turret. The head 14 is a generally known structure (not described in detail herein), and the head and turret will be of the type described in the patent application as described above.

The head 14 is mounted for reciprocating slide movement on the slide 15.

Rollers 16 and 17 connected by main spindles axially fixed to the jutelet frame 12, ie by respective spindles 18 and 19, onto the mount support member 20. Guided by.

An additional roller 22 behind the slide 15 is arranged to roll on a track 23 that can move up and down as shown in FIGS. 2 and 3 for the retraction of the head 14. do.

This reciprocation of the head 14 causes the flare 27 of the mount to come into contact with the end of the tub 10 to cause the burner 28 to seal the flare 27 and the tub end together. Advance the mount 25 attached to the head until.

Generally, a cam device (not shown) is installed on each head 14 to preheat the end of the tubing, to close the encapsulation by a butting board (not shown), and to lubricate the encapsulation at a low temperature. The reciprocating shaft motion is performed in accordance with an operation cycle of expanding and fixing the encapsulation.

In FIG. 2, the head 14 is located in the lower center of the annular turret 12 and is moved from its approximately horizontal position to its vertical position by a suitable cam device, schematically indicated at 29. In this vertical position, when the head 14 moves in the direction of the upper axis indicated by the dotted line, one mount 25 is held by the head 30 of the mounting loading conveyor 31 in the same vertical plane and outside the sealing device itself. Introducing into the head 14 can be seen as a relatively simple problem compared to conventional complex internal loading schemes as described above. Once the head 14 is loaded, the head 14 is pivoted to a horizontal position for the next sealing operation.

A structure that allows 90 ° angular movement of the head between approximately horizontal and vertical positions is basically a simple joint connection where the main casting of the sliding head 14 is connected to the arm 41 of the head frame by the pivot 40. It becomes a structure.

Although in the preferred embodiment of the present invention, the mount loading is taken at the "bottom center" after the head 14 is moved 90 ° to the vertical plane (the actual movement of the head 14 when the turret is rotated is indicated by the arrow in FIG. Substituting embodiments may be considered, ignoring the complexity as indicated by 42). This is because the mount loading is taken at the "top center" by the upshift of the mount in the mount conveyor head or the actual mount loading takes place in an intermediate position and the head 14 is pivoted at an angle different from 90 °.

The mechanism that moves at an angle is different and more complex than a simple pivot being used.

Instead of rotating turrets, chain conveyors can be employed to advance the head in any case where the movement of the head is continuous or intermittent.

Claims (1)

In a sealing head for a horizontal fluorescent tube sealing device, each of the pair of sealing heads is adapted to receive a mount 25 that is sealed at each end of the tubular lamp shell 10 extending between the heads 14. Arranged, the sealing head is connected to the head frame (41; 12), the mount support member 20 coupled with the head is fixed to the head frame by a connecting means of the pivot 40, the connecting means A space between the mount sealing position where the mount 25 and the tubular sheath 10 are on the same axis, and a sufficient angle from the mount sealing position so that the mount 25 is introduced into the head 14 and fixed. Displaced sealing head for a continuously rotating horizontal fluorescent tube sealing device, characterized in that the mounting support member 20 can pivot at an angle between the mounted mounting positions.

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