JP3240190B2 - Gas filling method for neon glass tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas filling method for filling a neon sign glass tube with neon gas or argon gas.

[0002]

2. Description of the Related Art Conventionally, a method for filling a neon sign glass tube with a neon gas or an argon gas is as follows.
A vacuum pump is connected between the glass tube and the vacuum pump, and the vacuum pump is operated to bleed air from the inside of the glass tube. Methods of guiding and sealing the body have been implemented.

[0003]

However, in the above-mentioned conventional example, the rough air is directly passed through the diffusion pump between the neon sign glass tube and the vacuum pump. In addition, since the hydraulic oil inside the diffusion pump is exposed to the atmosphere, there is a problem that the oxidation of the hydraulic oil proceeds quickly, and the degree of vacuum deteriorates quickly.

Further, when supplying a neon gas body into a glass tube, the neon gas body is filled while being manually adjusted through an opening / closing cock made of glass. Skill was required to make the procedure accurate.

[0005]

According to the present invention, in order to fill an argon gas or a neon gas into a neon glass tube provided with a mercury reservoir at a suction port, in a first stage, a neon glass tube and a vacuum pump are connected to each other at a flow rate. Through a first suction line having an orifice to reduce the air inside the neon glass tube, and in a second stage, through a second suction line connecting the neon glass tube and a vacuum pump. Connect the second
The air inside the neon glass tube is directly evacuated via the suction line and a high voltage is applied to the electrode portion of the neon glass tube to heat the neon glass tube. In the third stage,
The air inside the neon glass tube is sucked through a third suction line connecting the neon glass tube and the diffusion pump side, and the inside of the neon glass tube is raised to a predetermined degree of vacuum. Argon gas or neon gas is introduced into a neon glass tube to seal the neon glass tube.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a neon glass tube for a neon sign,
It is a piping diagram which shows the state which connected the vacuum pump and the diffusion pump, and Z in the figure is a neon glass tube for neon signs, and is connected to the stainless steel branch pipe 17 for suction, and the 1st main pipe 2. They are connected via the second main pipes 2-1 and 2-2. D-1 and D-2 are connection second main pipes 2-1 and 2-2.
A solenoid hose 16 is connected midway between the neon glass tube Z and the stainless steel branch tube 17.

N-1 is a glass cylinder containing a neon gas n for emitting red light, H is an electromagnetic on-off valve, a-1 is a glass cylinder containing an argon gas a for emitting blue light, G is an on-off valve for electromagnetic, A -1 is a gas cylinder containing argon high-pressure gas for emitting blue light, 4 is a gas supply pipe, and a second main pipe 3
-1. 6 is a gas connection pipe of neon gas n,
Reference numeral 5 denotes a gas connection pipe for argon gas a. Li and Nu are manual glass on-off valves.

[0008] A distribution pipe 11 is connected to the base of the first main pipe 2 and a solenoid valve mounting board 12 having three solenoid valves is connected. A is a first suction operation valve, and the first suction operation valve A is connected to a rotary vacuum pump L via a first suction pipe 1-1 having an orifice 13 for narrowing a flow path.
The first suction pipe 1-1, the first suction operation valve A, the orifice 13 and the like constitute a first suction pipe 1-1A for gradually removing air inside the neon glass tube Z. 1-
Reference numeral 2 denotes a second suction pipe connected to the rotary vacuum pump L, and B denotes a second suction operation valve. The second suction operation valve B is connected to the rotary vacuum pump L via the second suction pipe 1-2. ing. The second suction pipe 1-2 and the second suction operation valve B constitute a second suction pipe line 1-2A.

C is a vacuum operation valve, and a blinking pattern C
Connected to OM. Q is a Geisler tube for checking. If the inside of the neon glass tube Z for the neon sign has a certain degree of vacuum, the lamp is not turned on.
The suction operation valve E is closed, the electromagnetic switching valve H or the electromagnetic switching valve G is opened, and argon gas a or neon gas n is introduced.

F is an automatic open / close check valve provided on the rotary vacuum pump L side, 3-2 is a third suction pipe connected to the second main pipe 3-1 and provided with a third suction operation valve E. . K is a diffusion pump connected to the distal end of the third suction pipe 8, which can be precisely increased to a predetermined degree of vacuum by the diffusion pump K.

The third suction pipe 3-2, the third suction operation valve E, the diffusion pump K, and the like constitute a third suction pipe 3A. F is an automatic reverse on-off valve provided on the diffusion pump K side, R and O are rubber hoses, N-1 is a red gas high-pressure tank replenishing section connected to the tip of the first main pipe 2, E is a manual on-off valve, and D is a minute A manual opening / closing valve provided on one side of the pipe 11, a manual opening / closing valve provided on a connection pipe 3-3 branched from the second main pipe 3-1 and an electromagnetic valve D-3 provided midway on the connection pipe 3-3. On-off valve, 14 is an orifice provided on branch pipe 7 for extracting gas, 15 is a thin glass tube, 18 is an electrode,
Is an electromagnetic on-off valve. P is a mercury meter for vacuum measurement provided at the tip of the gas supply pipe 4, and R is a high-pressure bombarder for baking the neon glass tube Z.

The embodiment of the present invention is constructed as described above. Therefore, when the neon gas n is filled in the neon glass tube Z for neon sign, which has been provided with electric wiring in advance, the following procedure is performed.

First, a neon glass tube Z is connected to the first main pipe 2-1 for connection and the branch pipe 17 made of stainless steel, and then the vacuum pump L is operated. Then, the electromagnetic on-off valve D-1 is opened, and the first suction operation valve A is opened to open the first suction pipe 1-1.
The air in the neon glass tube Z is gradually sucked through the orifice 13. In this case, since the air is slowly evacuated through the first suction pipe 1-1 by the restriction of the orifice 13, the mercury in the mercury reservoir S attached to the inlet of the neon glass tube Z is transferred to the vacuum pump L side. There is no being drawn.

Next, the first suction operation valve A is closed and the second suction operation valve B is opened. Then, the baking process is performed by suctioning to a certain degree of vacuum through the second suction pipe 1-2, turning on the blinker COM, and supplying a high voltage V to the electrode portion 18 after a certain period of time. Thereafter, the baking treatment is performed while gradually and automatically evacuating, then the third suction operation valve E is opened, and at the same time, the diffusion pump K is operated, the pressure is raised to a high vacuum, and the check Geisler tube Q is turned on to turn on the vacuum. Is checked, the third suction operation valve E is closed and the electromagnetic on-off valve H is opened to guide the neon gas n into the neon glass tube Z. Then, when the neon gas n reaches a predetermined pressure by the mercury meter P, the solenoid on-off valve D-1 is closed.
-2 and open the first suction operation valve A and return to the first operation. Then, the base 15 of the neon glass tube Z is sealed during evacuation of the baking treatment.

When bleeding air from the second suction pipe 1-2, a certain amount of air is bleed in the first stage.
The flow rate when air is extracted from the neon glass tube Z can be suppressed by the second suction tube 1-2. Therefore, mercury in the mercury reservoir S is not drawn into the vacuum pump L side.

In addition, argon gas a is supplied to a neon glass tube Z.
The same applies to the case of enclosing in the above. The baking process is the most important work in the production of neon tubes, and the gas generated during the baking process expands by heating and the pressure increases, so the vacuum is automatically and accurately vacuumed according to the pattern incorporated in the control COM. The baking process is performed by a timer incorporating only the calculated time.

As described above, according to the above embodiment, in order to fill the neon glass tube Z for neon sign with the argon gas a or the neon gas n, the neon glass tube Z and the vacuum pump L The first suction pipe 1-1 having the orifice 13 for restricting the flow path is connected between the first suction pipe 1-1 and the air inside the neon glass tube 1 is gradually discharged through the first suction pipe 1-1. In the second stage, the air inside the neon glass tube Z is evacuated and the inside of the neon glass tube Z is heated through the second suction line 1-2A that directly connects the neon glass tube Z and the vacuum pump L, In the three stages, the air inside the neon glass tube Z is sucked through a third suction line 3A connecting the neon glass tube Z and the diffusion pump K side to increase the degree of vacuum to a predetermined degree. Then, argon gas a or neon gas n Is introduced into the neon glass tube Z, since it is obtained by sealing the same neon glass tube Z, the red and blue light-emitting body of gas, safe, and is capable of efficiently filling. Further, since the stainless steel pipe is used, it is possible to prevent the glass pipe from being damaged, automate the production of the neon sign, save labor, and manufacture the neon sign at low cost. Further, gas can be quickly filled in the neon glass tube, so that efficiency is improved.

[0018]

According to the present invention, it is possible to safely fill a neon glass tube with an argon gas or a neon gas for light emission, and also possible to manufacture a neon sign at a low cost by preventing breakage of the glass tube. .

[Brief description of the drawings]

FIG. 1 is a piping circuit diagram schematically illustrating a gas filling method according to the present invention.

FIG. 2 is a side view showing details of a base of the neon glass tube.

[Explanation of symbols]

 K Diffusion pump L Vacuum pump Z Neon glass tube a Argon gas n Neon gas 1-1A First suction line 1-2A Second suction line 3A Third suction line 13 Orifice

Claims (1)

(57) [Claims] In order to fill an argon gas (a) or a neon gas (n) into a neon glass tube (Z) provided with a mercury reservoir (S) at an inlet, in a first step, a neon glass tube (Z) is used. And a vacuum pump (L) are connected via a first suction line (1-1A) having an orifice (13) for reducing the flow rate, and the air inside the neon glass tube (Z) is gradually discharged . In the two stages, the neon glass tube (Z) and the vacuum pump (L) are connected via a second suction line (1-2A) for connection, and via the second suction line (1-2A). directly to the with unplug neon glass tube (Z) inside the air Te Ne
A high voltage is applied to the electrode portion (18) of the on-glass tube (Z).
In the third stage, the neon glass tube (Z) is heated via a third suction line (3A) connecting the neon glass tube (Z) and the diffusion pump (K). Z), the air inside the neon glass tube (Z) is increased to a predetermined degree of vacuum, and then, in a fourth stage, the argon gas (a) or the neon gas (n) is replaced with the neon glass tube (Z). ), And sealing the neon glass tube (Z).