JPS6342313Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an auxiliary light source device mainly used in a heating furnace for thermal analysis.

As a heating furnace for thermal analysis, one is known in which a through hole is provided in the furnace wall so that a sample in a heated state can be observed, and a microscope is disposed in the through hole. This device is bright with visible light emitted from the heating source (infrared lamp) when the temperature inside the furnace is quite high, such as 1000℃, but when the temperature is relatively low, the field of view is dark, so the sample must be observed carefully. There was an inconvenience that it was not possible to do so.

The purpose of the present invention is to provide an auxiliary light source device with a simple configuration that can eliminate such inconveniences. In a heating furnace in which a sample 3 placed inside can be observed, a through hole 7 is formed in a lamp cover 5 that is attached to a lamp holder 4 so as to face a lamp 6, and the axis of the thermal reactor is inserted into the through hole 7. It is characterized in that the light guide rods 8 disposed in the direction are fitted and fixed.

Fig. 1 is an exploded view of one embodiment of the present invention, Fig. 2 is a side view of a heating furnace equipped with an auxiliary light source device of the present invention, Fig. 3 is a sectional view taken along the line - - of Fig. 2, and Fig. 4 2 shows a sectional view taken along the line -- in FIG.

In FIG. 1, 4 is a lamp holder, and the lamp holder 4 has a socket for mounting a lamp 6 and a cord 9 electrically connected to the socket, and a lamp cover 5 screwed onto the socket faces the lamp 6. It has a transparent quartz glass rod as a light guide rod 8 whose base end is fitted and fixed in a through hole 7 formed at a position,
It also has heat dissipation fins 10 on its outer peripheral surface. The lamp holder 4 and lamp cover 5 constitute a lamp house.

In the figure, reference numeral 11 denotes an auxiliary light source device mounting jig. The mounting jig 11 is made of silicone rubber, for example, and includes a hole 12 through which the light guiding rod 8 passes, an annular groove 13 into which a protection tube (described later) is fitted, and a plurality of holes. 14 ventilation holes
has.

In FIGS. 2 to 4, reference numeral 15 denotes a heating furnace, and the heating furnace 15 has a plurality of gold-plated elliptical reflective surfaces 16 formed on its inner peripheral surface, and an infrared lamp 17 is placed at the focal point of the elliptical reflective surfaces 16. It has a through hole 2 in a part of the furnace wall, and a microscope 18 is attached to this transparent part.

Reference numeral 19 denotes a transparent quartz glass protection tube that can heat the sample in a high vacuum or high purity gas, and the protection tube 19 is attached via a joint 20 to a metal fitting 23 to which a sample support tube 22 that supports a sample boat 21 is fixed. .

The joint 20 has an annular inner cavity 27 provided with a through hole 24 through which the gas flows into the protection tube 19 or air is withdrawn from the protection tube 19, and holes 25 and 26 through which cooling water flows in and out.

The heating furnace described above is the same as the conventional one, and the auxiliary light source device of the present invention is installed in this heating furnace as follows.

The light guide rod 8 is formed to be smaller than the inner diameter of the shorter diameter portion of the protection tube 19, and its length is smaller than the inner diameter of the short diameter portion of the protection tube 19.
When inserted from one end, it can reach the vicinity of the sample boat 21.The mounting jig 11 is fitted to the light guide rod 8, and the rod 8 is inserted into the protective tube 1.
After fitting into the protective tube 19, the annular groove 13 of the mounting jig 11 is engaged with the end of the protective tube 19, thereby attaching the auxiliary light source device to the protective tube 19.

The light from the lamp 6 is guided in the axial direction from one end of the light guide rod 8, exits from the other end, and is reflected by the reflective surface 16, and efficiently illuminates the sample 3, so the lamp 6 requires relatively low power. For example, 5W is sufficient.

As described above, the present invention can sufficiently achieve the purpose with a low-power lamp and a simple configuration when the inside of the heating furnace is relatively low temperature and the specimen cannot be observed in detail with the illumination of the infrared lamp itself. It has the advantage of being particularly suitable for thermal analysis.

[Brief explanation of the drawing]

Fig. 1 is an exploded side view of one embodiment of the present invention, Fig. 2 is a side sectional view of a heating furnace equipped with the auxiliary light source device shown in Fig. 1, and Fig. 3 is a cross-sectional view taken along the - line in Fig. 2. The top view and FIG. 4 show a sectional view taken along the line -- in FIG. 1...Furnace wall surface, 2...Through hole, 3...Sample, 4...
...Lamp holder, 5...Lamp cover, 6...Lamp, 7...Through hole, 8...Light guide rod.

Claims (1)

[Scope of utility model registration request] In a heating furnace in which a through hole 2 is provided in a furnace wall surface 1 so that a sample 3 placed in the furnace can be observed through the through hole 2, a lamp cover 5 attached to a lamp holder 4 is placed opposite a lamp 6. to form a through hole 7,
An auxiliary light source device for a heating furnace, characterized in that a light guiding rod 8 disposed in the axial direction of the thermal reactor is fitted and fixed in the through hole 7.