JP2543808Y2 - Base heating device for fluorescent tubes - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base heating apparatus for a fluorescent tube, and more particularly, to a bonding machine for fixing a base to a glass tube in a straight tube type fluorescent lamp manufacturing machine. It is a device, which is Japanese Utility Model Publication No. 58-33641.
The improvement of the device shown in the item.

[0002]

2. Description of the Related Art In a straight tube type fluorescent lamp manufacturing machine, a heating device for heating a cement for fixing a base to a glass tube is provided. As a conventional example of such a heating apparatus, there is a "basing heating apparatus" disclosed in Japanese Utility Model Publication No. 58-33641. This basing heating device includes a fan-shaped hot air jet head disposed outside a turning path of a glass tube for a fluorescent lamp that rotates while rotating, and an air supply pipe that feeds air into the hot air jet head from an outer peripheral side thereof. And a plurality of burners arranged on one side of the hot-air jet head, and the air from the burner is blown at right angles to the air blown out from the air supply pipe and flowing inward in the radial direction inside the hot-air jet head. Heating the air and thereby heating the base of the base attached to the glass tube moving radially inward of the hot air jet head to heat the cement in the tube between the base and the end of the glass tube. It has become.

[0003] However, in this apparatus, a large number of burners must be arranged in a circle, and there is a problem of large energy loss, and the combustion gas from the burner and the air flow from the air supply pipe are not completely mixed. There is a problem that the temperature of the heated air from the hot-air jet head is uneven, and it is difficult to accurately match the hot-air blowing position at an appropriate temperature with the cement position.

[0004]

A problem to be solved by the present invention is that in a base heating apparatus for a fluorescent tube, the temperature of hot air in a hot-air jet head is made uniform and is blown onto a base mounted on a glass tube. In addition, the hot air blown to the die base is collected and reused, thereby improving the thermal efficiency.

[0005]

According to the present invention, a hot-air jet head is provided on one side of a moving path of the fluorescent tube so that a hot-air outlet is aligned with a base provided on the fluorescent tube. In a base heating device for a fluorescent tube for heating by blowing hot air from the hot air jet head onto a die base, the hot air jet head is divided into a plurality of portions along a moving direction of the fluorescent tube, and each of the divided hot air jet head portions A hot air generator that burns fuel gas with combustion air and sends the combustion gas to the hot air jet head portion is attached to each of the tubes, and the other side of the moving path of the fluorescent tube is connected to the base from the hot air jet head to the base. A collecting duct for collecting the hot air blown toward the collecting duct is provided, and a diluting gas pipe is attached to the hot air generating device, and the diluting gas pipe is connected to the collecting duct.

[0006]

In the above configuration, the fuel gas is burned by the combustion air in the hot air generator. The combustion gas generated by the combustion is mixed with the diluent gas sent through the diluent gas pipe therein to become hot air having a substantially uniform temperature. The hot air is blown from the outlet of the hot air jet head. On the other hand, the fluorescent tube is moved while rotating along a predetermined movement path adjacent to the outlet with the base of the base attached to the end of the fluorescent tube aligned with the outlet. Therefore, the base is heated to a predetermined temperature by hot air. The hot air that has heated the base is collected by the collection duct and sent again to the hot air generator via the dilution gas pipe.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a base heating device 1 according to an embodiment of the present invention. In this embodiment, the base heating device 1 is arranged such that hot air arranged along a moving path of a fluorescent tube, that is, a glass tube g on a circumference having a radius R around the center axis OO and radially inside the moving path. An ejection head 2 is provided. In this embodiment, the hot air jet head 2 is divided into six hot air jet head portions (hereinafter, simply referred to as head portions) 2a to 2f. Since the structure and function of each head portion are the same, the description of the structure of the head portion will be given to one of them 2a. The head portions 2a to 2f of the hot air jet head 2 are arranged along the circumferential direction in a positional relationship as shown in FIG. 1, and a pair of mountings mounted on a frame 11 fixed to a base 10 of the entire apparatus. The plate 12 is fixed so as to be substantially perpendicular to the center line OO as shown in FIG.

As is clear from FIGS. 1 to 5, the head portion 2a has a heat insulating material 22 disposed inside a pair of metal plates 21 each having a substantially fan-shaped planar shape, and has a radially outer portion. Except for the above, a plurality of fixing devices 24 having a known structure including bolts and nuts sandwiching the peripheral wall heat insulating material 23 and fixing the heat insulating material 22 with the distance between the inner surfaces thereof being W. A transparent space limiting member 26 for limiting the outlet is fixedly arranged between the pair of heat insulating materials 22 at a radially outer peripheral portion of the head portion 2a. The gap limiting member 26 is made of a heat insulating material and defines a small (compared to W) width hot air outlet 27. The hot air outlet 27 extends in the radial direction at right angles to the central axis OO. The gap limiting member 26 is fixedly held on the head portion 2a by a plurality of fixing devices 24. A chamber C is defined in the head portion 2a, and the chamber communicates with the narrow outlet 27. The outlet 27 extends over a circumferential length L close to the entire length of the head portion.

A hole 28 is formed in the radially inner portion of each of the head portions 2a to 2f at substantially the center of the peripheral wall heat insulating material 23, and a hot air generator 3 (3a to 3
The tip of the main body 31 of f) is fitted and fixed. The hot air generator 3 itself may have a commercially available structure, and the fuel gas supplied by the fuel gas supply pipe 34 connected to the main body 31 of the hot air generator 3 is supplied to the combustion air supply pipe 33 also connected to the main body 31. It is a structure of burning by the combustion air supplied by the above. Therefore, a detailed description of the structure and function of the hot air generator is omitted. Each fuel gas supply pipe 34 has a hollow cylinder 36 arranged concentrically with the center axis OO.
Formed in the axial direction (6 in this embodiment).
Of the fuel gas supply passages 37, and each of the combustion air supply pipes 33 is formed in the hollow cylinder with a plurality (six in the present embodiment) formed alternately with the fuel gas supply passages 37 in the circumferential direction. Is connected to any of the combustion air supply passages 38. The fuel gas supply passage is connected to a fuel gas source (not shown), and the combustion air supply passage is connected to an air supply source (not shown).

A recovery duct 41 of the hot air recovery device 4 is disposed radially outside the moving path of the glass tube g. In this embodiment, the recovery duct 41 extends in an arc from the center of the head portion 2b to the end of the head portion 2f. The recovery duct 41 has a structure in which a surface facing the hot air jet head is open, and other surfaces are closed. It is desirable to apply a heat insulating material to the inner surface or the outer surface of the recovery duct 41 to prevent heat dissipation. The collection duct 41 includes a bracket 13 attached to the base 10.
, And the positioning with respect to the hot air jet head 2 is performed. One end of a collection pipe 42 is connected to the collection duct 41, and the other end of the collection pipe 42 is connected to a hot air blower 43. The hot air blower is near the center axis 0-0, and the blower tube 44 of the hot air blower 43 is passed through the hollow cylinder 36. The tip of the blower pipe 44 is connected to a corresponding dilution gas pipe via one of a plurality of distribution pipes 45 extending in the radial direction.

In the apparatus having the above structure, the hot air generator 3
The fuel gas and the combustion air are supplied into (3a to 3f), and the fuel gas is burned with the combustion air in a known manner therein to generate the combustion gas. The combustion gas generated by the hot air generator 3 is diluted by a diluent gas supplied through a diluent gas pipe 35 and is turned into hot air having a substantially uniform temperature in the chamber C in the head portions 2a to 2f of the hot air jet head 2. Is done. The hot air that has entered the chamber C is blown through a narrow outlet 27 toward a die base attached to an end of a glass tube that moves while rotating along a movement path. Therefore, the base and the cement between the base and the glass tube are heated by hot air.

The hot air that has heated the base of the base
From 1, it is sucked by the action of the hot air blower 43, sent to the corresponding dilution gas pipe via the recovery pipe 42, the hot air blower 43, the blow pipe 44, and the distribution pipe 45, and used again as a dilution gas. Therefore, the thermal efficiency of the heating device can be improved.

[0013]

According to the present invention, the following effects can be obtained. (1) The hot air used to heat the base is recovered and reused, so that the heat released to the outside can be effectively used, and the consumption of fuel gas is reduced compared to a conventional base heating device. Can be reduced to 1/3. (2) After mixing the hot air generated by the hot air generating device with the diluting gas, the hot air is blown out through the hot air blowing port of the hot air jet head, so that it is possible to blow out the hot air having a uniform temperature over the whole. Become. (3) Since the hot air jet head is divided into a plurality of parts along the traveling direction of the glass tube, the management of each part can be easily performed.

[Brief description of the drawings]

FIG. 1 is a front view of a base heating device for a fluorescent tube according to the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

3 is a plan view showing a part of one portion of the hot air jet head of FIG. 1 in a cross section.

FIG. 4 is a top view of a portion of the hot air jet head shown in FIG. 3;

FIG. 5 is a sectional view of a portion of the hot air jet head of FIG. 3;

FIG. 6 is an enlarged partial sectional view of a hollow cylinder in which a fuel gas supply passage and a combustion air supply passage are formed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Heating device 2 Hot air injection head 2a-2f part 21 Metal plate 22, 23 Heat insulating material 3 Hot air generator 31 Main body 35 Diluent gas pipe 4 Hot air recovery device 41 Recovery duct 43 Blower

Claims (1)

(57) [Scope of request for utility model registration] A hot air jet head arranged on one side of a moving path of the fluorescent tube so that a hot air outlet is aligned with a base provided on the fluorescent tube; In a base heating device for a fluorescent tube that blows and heats a base of a base, the hot air jet head is divided into a plurality of portions along a moving direction of the fluorescent tube, and each of the divided hot air jet head portions is provided with combustion air. A hot air generator that burns the fuel gas and sends the combustion gas to the hot air jet head is installed, and on the other side of the moving path of the fluorescent tube, hot air blown from the hot air jet head toward the base is collected. A base heating device for a fluorescent tube, characterized in that a recovery duct is provided, and a dilution gas pipe is attached to the hot air generator, and the dilution gas pipe is connected to the recovery duct.