JPS5847637Y2 - Tube manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a tube manufacturing apparatus suitable for manufacturing tubes such as arc tubes for high-pressure mercury lamps.

Conventionally, as shown in FIG. 1, a large number of tube holders 2 are placed at regular intervals on the upper surface of the outer periphery of a turntable 1 that rotates intermittently. A mount chuck 3 is disposed in correspondence with the tube holder 2, and a fixed burner 4a is rotatably disposed in the burner 4a.

4b is provided separately from the turntable 1.

The fixed burners 4a and 4b have, for example, two heads for preheating and one head for main heating.

In this device, a tube 5 supported by a tube holder 2 passes between fixed burners 4 a and 4 b while rotating.

In the figure, 7 a and 7 b are molds for sealing the sealing portion.

However, in this device, when the tube 5 is rotated, the exhaust pipe 6, which is integrated with the tube 5, also rotates, so a space is required for the exhaust tube 6 to rotate, and each tube is rotated. There is a drawback that the holder 2 needs to be constructed large and the device becomes large.

Therefore, as shown in FIG. 2, a conventional device has a large number of tube holders 2 fixedly disposed at regular intervals on the outer peripheral surface of a turntable 1 that rotates without intermittent motion, and each tube holder Burner 4 having a rotation mechanism corresponding to 2
A, 4B are provided on the turntable 1.

Further, a mount chuck 3 is provided corresponding to each tube holder 2.

However, in this device, since rotary burners 4a and 4b are provided corresponding to each tube holder 2, each tube is heated by a pair of baths from preliminary heating 7 to main heating. Therefore, the degree of heating varies depending on each burner, resulting in an uneven finish of the product.

The present invention has been devised in view of the above points, and aims to provide a tube manufacturing device that can be constructed in a relatively small size, can produce uniform products, and is easy to manufacture. .

The present invention will be explained below with reference to FIGS. 3 to 5.

3 and 4 are an enlarged perspective view and an enlarged side view of the main parts of the tube manufacturing apparatus according to the present invention, and the tube holder, housing, and burner shown in the same figures are as shown in FIG. It is arranged.

In FIG. 3 and FIG. 4, 11 is a turntable that rotates while making intermittent motion, 12 a , 12 b ,
12C... are a large number of tube holders fixedly disposed at regular intervals on the outer periphery of the upper surface of the turntable 11, and are configured to have, for example, about 8 to 32 heads.

13 is each tube holder 12 a , 12 b , 12 C
A tube support arm provided on... that grips the tube.

14 is a tube held by the tube support arm 13; 15 is the tube 14;
an exhaust pipe integrally constructed with the tube holder 12 a;
, 12 b, 12 C..., and has one end fixed to the outer periphery of the upper surface of the turntable 11.

Reference numeral 17 denotes an exhaust pipe holder whose one end is fitted into the exhaust pipe 15 of the tube 14, which determines the position of the tube and feeds inert gas into the inside of the tube 14 through the exhaust pipe holder 17 to prevent electrodes, etc. during work. This prevents the distribution of

18a, 18b, 18C are turntable 1
It is a hollow housing which is fixedly arranged separately from the head 1 and is composed of, for example, three heads.

19a and 19b are the respective housings 18a and 18
A burner rotatably disposed in b, 18c,
When the housing is composed of three heads, the burners 19 provided in the housings 18a and 18b of the first two heads
Preheating is performed at a, 19 b, and the final housing 1
Main heating is performed using burners 19a and 19b provided at 8C.

20 is each tube holder 12a. 12b, 12c
This is a mount chuck provided correspondingly to the housing 18C, and is configured to move up and down in the hollow part of the housing 18C.

The mount chuck 20 is moved up to a predetermined position within the housing 18C at a point where the tube is preheated by the burners 19a and 19b and then the main heating is performed, and before the burner turns on for the main heating.

21 a and 21 b are molds for sealing the sealing portion of the bulb 14 .

Next, the operation of the above tube manufacturing apparatus will be explained.

(a) First, the tube holders 12 a , 12 b , 12
The tube 14 is supported on the turntable 1.
1 is rotated intermittently, and preheating is performed using burners 19a and 19b.

After the preliminary heating is completed, the tube 14 is moved to a position corresponding to the molds 21a and 21b to be subjected to main heating as shown in FIG.

(b) Next, attach the cella 1 to the mount chuck 20 in advance.
The electrode mount is pushed up through the hollow part of the housing 18C to the lower end of the bulb 14, and then the burner 1
9a and 19b are ignited and rotated to perform main heating.

(C) When the temperature of the sealed portion of the tube 14 reaches the sealing temperature, the burners 19 a and 19 b stop rotating at a certain position, and the molds 21 a and 21 b close the sealed portion of the tube 14. Seal.

(d) After sealing the tube, extinguish the burners 19a and 19b, and return the molds 21a and 21b and the electrode mounting chuck 20 to their original positions.

As described above, the present invention has a plurality of tube holders fixed at regular intervals on the upper surface of the outer periphery of a turntable that rotates intermittently, and a plurality of tube holders each having a rotatable burner separately from the turntable. The housing is fixedly arranged,
Furthermore, since the device is configured so that the mount chuck provided in correspondence with the tube holder can be moved up and down within the housing, the tube is supported by the tube holder without rotating, and is therefore integrated with the tube. The exhaust pipe does not rotate, and there is no need to provide a space for the exhaust pipe to rotate.It can be constructed more compactly than the conventional device shown in Figure 1, and the tube is installed separately from the turntable. Since the plurality of housings are heated by different burners, heating can be uniformly performed and products with less variation can be obtained compared to the conventional structure shown in FIG. 2, which is heated by one burner.

Furthermore, after the preheating of the tube is completed and before the main heating, the mount chuck ascends into the housing and is set at a predetermined location on the tube. This method has various advantages such as easy preheating, and the electrode mount supported on the mount chuck is not affected by heat.

[Brief explanation of the drawing]

1 and 2 are schematic side views of a conventional tube manufacturing device, FIG. 3 is a schematic side view of main parts of a tube manufacturing device according to the present invention, and FIG. 4 is a schematic side view of a tube manufacturing device according to the present invention. A perspective view of the main parts of the device,
FIG. 5 is a simplified plan view showing the arrangement of the tube holder, burner and mold according to the present invention. 11... Turntable, 12 a, 12
b, 12 C... tube holder, 18 a,
18 b, 18 C...Housing, 19a
, 19b...Burner, 20...Mount chuck, 21a, 21b...Mold.

Claims (1)

[Scope of utility model registration request] a turntable 11 that rotates without intermittent motion;
A large number of tube holders 12 a , 12 b , 12 are fixed to the upper surface of the outer periphery of the turntable 11 at regular intervals.
C..., a plurality of housings 18a, 18b, 18C having rotary burners 19a, 19b and fixedly arranged separately from the turntable 11, and a large number of tube holders 12a, 12b, 12C, . . . A light bulb manufacturing apparatus characterized in that it has a light bulb mount chuck 20 which is provided on the turntable 11 in correspondence with the light bulbs 12b, 12C, .