JP2005063907A - Incandescent lamp and heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating device allowing the tube length of incandescent lamps constituting respective heating units, and capable of heating a heating object with an optimum temperature distribution; and to provide an incandescent lamp composed by improving a structure in a curved part of a tube type arc tube. <P>SOLUTION: This heating device is so structured that the heating units A1, B1 and A2 are composed by arranging a plurality of these incandescent lamps 1 in each of which a filament is disposed in the tube type arc tube, and each of which is formed into a nearly U-shaped form comprising a horizontal part of the tube type arc tube forming a light emitting part and vertical parts of the tube type arc tube extending from both ends of the horizontal part through bent parts so as to set the horizontal parts parallel with one another; at least three of the heating units are arranged side by side in the direction in which the horizontal parts of the incandescent lamps of the respective heating units extend; and the respective heating units A1, B1 and A2 are divided into regions E-M allowing lighting control independently of one another in a direction perpendicular to the horizontal parts of the incandescent lamps 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an incandescent lamp for heating a glass substrate such as a liquid crystal substrate or a plasma display, and a heating apparatus using the incandescent lamp.

Conventionally, incandescent lamps have been used to heat glass substrates such as liquid crystal substrates and plasma displays.
Japanese Patent Application Laid-Open No. 2001-210604 describes a heating apparatus that heats a glass substrate by arranging a plurality of straight tube incandescent lamps.
JP 2001-210604 A

  By the way, in recent years, the glass substrate which is a to-be-heated object has increased in size, and the tube length of the straight tube type incandescent lamp which constitutes the heating apparatus has been increased accordingly. For example, the tube length of an incandescent lamp reaches 2 m. However, when the tube length of the incandescent lamp becomes longer in this way, the lamp bends at the center of the lamp and the center of the lamp approaches the object to be heated, so the temperature distribution of the object to be heated collapses and the object to be heated is heated as designed. The problem of not being able to do. In addition, if the tube length becomes long, it will hinder maintenance and transportation of the incandescent lamp, and if the tube length becomes long, it will be necessary to increase the voltage applied to the incandescent lamp in designing and manufacturing the filament. When used in a vacuum, there are difficult insulation problems such as arcing.

  Further, in the conventional heating apparatus as shown in FIG. 12, the temperature near the both ends of the object to be heated is lowered by the escape of the heat, and in order to compensate for this, the filament of the incandescent lamp X has a light emitting portion at both ends. 201 is designed to generate a larger amount of heat than the light emitting unit 202 at the center. The incandescent lamp Y positioned at the center of the object to be heated is preliminarily heated in order to heat the center of the object to be heated so that the heat of the object to be heated does not escape compared to the incandescent lamp X positioned at the periphery. Is designed to be small.

  That is, in such a heating apparatus, the filament structure of each incandescent lamp and the output of the incandescent lamp are determined in advance. For this reason, it is possible to heat the object to be heated having a certain shape so that the optimum temperature distribution, specifically a uniform temperature distribution, can be obtained. There is a problem that you can not. Furthermore, even when the same object to be heated is to be heated with a different temperature distribution, it is difficult to control.

In view of the various problems described above, an object of the present invention is to make it possible to shorten the tube length of the incandescent lamp constituting each heating unit by configuring the heating device with a plurality of heating units. It is possible to heat an object to be heated with an optimal temperature distribution by enabling independent lighting control for each heating unit or by dividing each heating unit into multiple independent lighting controllable areas An object of the present invention is to provide a heating device.
Another object of the present invention is to provide an incandescent lamp having an improved internal structure in a curved portion of a tubular arc tube that is bent and extended from both ends of a horizontal portion of the tubular arc tube used in a heating device.

The present invention employs the following means in order to solve the above problems.
The first means is a heating device in which a filament is arranged inside a tube-type arc tube, a horizontal portion of the tube-type arc tube forming a light-emitting portion, and a curved portion of the tube-type arc tube from both ends of the horizontal portion. A heating unit configured by arranging a plurality of incandescent lamps formed in a substantially U shape composed of a vertical portion of the tubular arc tube extending through the horizontal portion so that the horizontal portions are parallel, At least three heating units are arranged side by side in the direction in which the horizontal portion of the incandescent lamp of each heating unit extends, and each of the heating units is lit independently in a direction orthogonal to the horizontal portion of the incandescent lamp. It is divided into controllable areas.

  The second means is a heating device in which a filament is arranged inside a tube-type arc tube, and a horizontal portion of the tube-type arc tube forming a light-emitting portion and a bent portion of the tube-type arc tube from both ends of the horizontal portion. A heating unit configured by arranging a plurality of incandescent lamps formed in a substantially U shape composed of a vertical portion of the tubular arc tube extending through the horizontal portion so that the horizontal portions are parallel, At least three or more heating unit groups arranged side by side in the direction in which the horizontal portion of the incandescent lamp of the heating unit extends are further arranged side by side in a direction orthogonal to the horizontal portion of the incandescent lamp of each heating unit. The heating units are configured to be capable of lighting control independently of each other.

  The third means is characterized in that, in the first means or the second means, a light emitting portion is formed in a vertical portion of the tubular arc tube.

  A fourth means is characterized in that, in any one of the first means to the third means, the heating region formed by all the heating units is formed in a rectangular shape.

  According to a fifth means, in any one of the first means to the fourth means, light is not irradiated to the sealing part of the incandescent lamp in the vicinity of the vertical part of the incandescent lamp of the adjacent heating unit. A light-shielding plate is provided.

  The sixth means is that a filament is arranged inside the tube-type arc tube, and extends from the horizontal portion of the tube-type arc tube forming the light-emitting portion and the bent portions of the tube-type arc tube from both ends of the horizontal portion. In the incandescent lamp formed in a substantially U-shape composed of a vertical portion of the tube-type arc tube, a supporter ring that supports the filament in the curved portion is in contact with a curved portion forming center inner wall of the curved portion, The curved portion is arranged so as to be separated from the inner wall of the curved portion formation opposite center side.

  The seventh means is that a filament is arranged inside the tube-type arc tube, and extends from the horizontal portion of the tube-type arc tube forming the light-emitting portion and the curved portions of the tube-type arc tube from both ends of the horizontal portion. In an incandescent lamp formed in a substantially U-shape composed of a vertical portion of the tubular arc tube, a curvature radius R1 of the curved portion, and a supporter ring interval supporting the filament provided in the curved portion, are denoted by S1. In this case, the relationship between R1 and S1 is S1 / R1 ≦ 0.8.

  According to the first aspect of the present invention, as a heating device, a filament is disposed inside a tube-type arc tube, and the tube-type arc tube is formed from a horizontal portion of the tube-type arc tube forming a light-emitting portion and from both ends of the horizontal portion. A heating unit configured by arranging a plurality of incandescent lamps formed in a substantially U-shape composed of a vertical portion of the tubular arc tube extending through a curved portion of the arc tube so that the horizontal portions are parallel to each other. And at least three of the heating units are arranged side by side in the direction in which the horizontal portion of the incandescent lamp of each heating unit extends, and each of the heating units is in a direction orthogonal to the horizontal portion of the incandescent lamp, respectively. Are divided into areas that can be controlled to be turned on independently, so that the tube length of the incandescent lamp that constitutes each heating unit can be made shorter than the tube length of the incandescent lamp that is constituted by one heating unit. Na As a result, to prevent the deflection of the lamp in the lamp central, uniform temperature distribution with respect to the object to be heated is obtained. Further, the object to be heated can be heated by zone control, and the object to be heated can be heated uniformly, or the object to be heated can be heated with a predetermined temperature distribution.

  According to invention of Claim 2, as a heating apparatus, a filament is arrange | positioned inside a tube type arc_tube | light_emitting_tube, and the said tube type from the horizontal part of the said tube type arc tube which forms a light emission part, and the both ends of this horizontal part A heating unit configured by arranging a plurality of incandescent lamps formed in a substantially U-shape composed of a vertical portion of the tubular arc tube extending through a curved portion of the arc tube so that the horizontal portions are parallel to each other. And at least three heating unit groups arranged side by side in the direction in which the horizontal portion of the incandescent lamp of the heating unit extends, and at least three groups in the direction orthogonal to the horizontal portion of the incandescent lamp of each heating unit. Since the heating units are arranged side by side and can be controlled to be lit independently, the incandescent lamp when the tube length of the incandescent lamp constituting each heating unit is configured by one heating unit is provided. It is possible to shorter than the pipe length up, resulting in preventing the deflection of the lamp in the lamp central, uniform temperature distribution with respect to the object to be heated can be obtained. Further, the object to be heated can be heated by zone control, and the object to be heated can be heated uniformly, or the object to be heated can be heated with a predetermined temperature distribution.

  According to the third aspect of the present invention, since the light emitting part is formed in the vertical part of the tubular arc tube, it is possible to prevent halogen gas from accumulating in the vertical part and to prevent filament breakage in this part. it can.

  According to the invention described in claim 4, since the heating region formed by all the heating units is formed in a rectangular shape, a rectangular object to be heated such as a glass substrate such as a liquid crystal substrate or a plasma display is heated. It is suitable for doing.

  According to the fifth aspect of the present invention, since the light shielding plate is provided in the vicinity of the vertical portion of the incandescent lamp of the adjacent heating unit so as not to irradiate the sealing portion of the incandescent lamp. Since light is not irradiated to the part, the temperature rise in the sealing part can be prevented and damage can be prevented.

  According to the sixth aspect of the present invention, the filament is arranged inside the tube-type arc tube, the horizontal portion of the tube-type arc tube forming the light-emitting portion, and the curve of the tube-type arc tube from both ends of the horizontal portion. An incandescent lamp formed in a substantially U-shape comprising a vertical part of the tubular arc tube extending through the part, and in the curved part, a supporter ring that supports the filament is a curved part forming center of the curved part Since it is arranged so as to be in contact with the inner wall and away from the inner wall on the bent portion formation opposite center side of the curved portion, even if the incandescent lamp is turned on and the filament expands due to thermal expansion, the supporter is in a free state, Filament deformation can be prevented.

  According to the seventh aspect of the present invention, the filament is arranged inside the tube-type arc tube, the horizontal portion of the tube-type arc tube forming the light-emitting portion, and the curve of the tube-type arc tube from both ends of the horizontal portion. In an incandescent lamp formed in a substantially U-shape composed of a vertical portion of the tubular arc tube extending through the portion, a supporter for supporting the filament provided in the curved portion with a radius of curvature of R1 When the interval between the rings is S1, the relationship between R1 and S1 is S1 / R1 ≦ 0.8. Therefore, even when the filament between the supporters is linearized, the curved portion formation center side inner wall and the filament Can be maintained at a predetermined distance or more, and the filament does not approach the inner wall of the curved portion forming center, so that the temperature rise of the arc tube at the curved portion can be avoided.

An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a diagram illustrating an arrangement configuration of heating units of a heating apparatus according to the invention of the present embodiment.
In the figure, a large number of solid lines each represent the incandescent lamp 1, and a region surrounded by a dotted line represents a lighting control region of each heating unit. A1, A2 are first heating units constituting the heating device, B1 is a second heating unit constituting the heating device, and E, F, G are orthogonal to the horizontal portion of the incandescent lamp 1 of the first heating unit A1. The lighting control regions H, I, and J, each of which can be controlled independently, are divided into three in a direction perpendicular to the horizontal portion of the incandescent lamp 1 of the second heating unit B1, The lighting control areas K, L, and M, each of which can be controlled independently, are divided into three in the direction orthogonal to the horizontal portion of the incandescent lamp 1 of the first heating unit A2, and each of the lighting control areas can be controlled independently. This is a possible lighting control area.

  2 and 3 are diagrams showing detailed configurations of the first heating units A1 and A2 and the second heating unit B1 shown in FIG. 1, respectively.

Fig.2 (a) is a top view of 1st heating unit A1, A2, FIG.2 (b) is a side view. In these drawings, 1 is an incandescent lamp composed of a tubular arc tube having a filament disposed therein and formed in a substantially U shape, and 10 is a tubular arc tube facing a surface to be heated (not shown) substantially in parallel. , 101 is the light emitting part of the filament in the horizontal part 10, 11 is the vertical part of the tubular arc tube formed through the curved parts 12 at both ends of the horizontal part 10, and 111 is the light emission of the filament in the vertical part 11. Sections 12 and 12 are curved portions that are bent approximately 90 degrees from the horizontal portion 10 and reach the vertical portion 11, and N, O, and P are lighting control regions E, F, and G (or K, L, It is a power feeding unit provided at a position corresponding to M).
Moreover, as for the dimension of each part of 1st heating unit A1, A2, as an example, L1, L3 represents the length of the lighting area | region of the electric power feeding part N and P, respectively, is 100 mm, and L2 is the lighting area of the electric power feeding part O This represents a length of 975 mm, and L4 represents a length of the horizontal portion 10 and is 120 mm.

FIG. 3A is a plan view of the second heating unit B1, and FIG. 3B is a side view.
In these figures, Q, R, and S are power supply units provided at positions corresponding to the lighting control regions H, I, and J that can be independently controlled to be lit.
Moreover, as for the dimension of each part of 2nd heating unit B1, as an example, L1 and L3 each represent the length of the lighting area of electric power feeding part Q and S, and are 100 mm, L2 is the length of the lighting area of electric power feeding part R L5 represents the length of the horizontal portion, and is 557 mm. Other configurations correspond to the configurations of the same reference numerals shown in FIGS.

  Here, the relationship between the length L4 of the horizontal portion 10 of the first heating units A1 and A2 and the length L5 of the horizontal portion 10 of the second heating unit B1 is the temperature of the central portion and the peripheral portion of the object to be heated. L4 ≦ L5 is set to facilitate control.

  Further, as shown in FIGS. 2 and 3, a filament light-emitting portion 111 is provided inside the vertical portion 11 of the incandescent lamp 1. This is because the halogen gas in the tube-type arc tube moves to a lower temperature in the arc tube due to the internal gas pressure in the arc tube or the temperature distribution state of the gas, etc., and erodes the low temperature part of the filament. Because there is. By providing the light emitting part 111 in the vertical part 11, it is possible to prevent the halogen gas from accumulating in the vertical part 11 and to prevent filament breakage in this part.

  As shown in FIGS. 1 to 3, according to the heating device of the present embodiment, since the heating device is composed of at least three heating units A1, B1, and A2, incandescence that constitutes each heating unit. The tube length of the lamp 1 can be made shorter than the tube length of the incandescent lamp in the case where it is constituted by one heating unit. As a result, the lamp is prevented from being bent at the center of the lamp and is uniform with respect to the object to be heated. Temperature distribution is obtained. Moreover, the voltage applied to the incandescent lamp can be set to 200 V or less by shortening the tube length of the incandescent lamp.

Further, the three heating units A1, B1, A2 are respectively provided with three lighting control areas (E, F, G), (E, F, G) in which lighting control can be performed independently in a direction orthogonal to the horizontal portion 10 of the incandescent lamp 1. H, I, J), (K, L, M), that is, the individual lighting control areas divided into nine in one heating device. Therefore, the object to be heated can be heated under zone control, and the object to be heated can be heated uniformly, or the object to be heated can be heated with a predetermined temperature distribution.
Specifically, the lighting control areas E, F, G, H, J, K, L, and M of the heating units A1, B1, and A2 corresponding to the surroundings where the heat of the object to be heated easily escapes are controlled by the lighting unit B1. It is possible to control the output of the incandescent lamp 1 to be higher than that in the region I.

In addition, in FIG. 1, although the case where two 1st heating units A1, A2 and one 2nd heating unit B1 were used as a heating apparatus was demonstrated, it is not limited to such a structure, Depending on the size of the object to be heated, a plurality of first heating units and second heating units can be arbitrarily combined to form a heating device having a heating region of any size.
FIG. 4 is a diagram showing a heating apparatus in which three second heating units B1 to B3 are arranged between the first heating unit A1 and the first heating unit A2.
FIG. 5 is a diagram showing a heating apparatus in which eight second heating units B1 to B8 are arranged between the first heating units A1 and A2 and the first heating units A3 and A4.

Moreover, although the 1st heating unit and the 2nd heating unit which were shown in FIG.1, FIG4 and FIG.5 each had three lighting control area | regions in each heating unit, instead of this, The inside of the heating unit may be configured by one lighting control region, and a plurality of the heating units may be combined to configure a heating device having a heating region of an arbitrary size.
FIG. 6 is a diagram showing a heating apparatus configured by combining nine third heating units C1 to C9 each having one lighting control region.

FIG. 7 shows a heating apparatus configured by combining a plurality of heating units, and a separation distance a between filaments which are the light emitting portions 101 of the incandescent lamps of adjacent heating units and the light emitting portions 101 of the horizontal portion 10 of the incandescent lamps. It is a figure which shows the relationship between the formed filament and the distance c between to-be-heated objects.
Here, the relationship between the separation distance a and the distance c is set to a / c ≦ 1. By setting in such a relationship, with respect to the infrared radiation intensity (100%) in the object to be heated immediately below the center part of the horizontal part of the incandescent lamp of the heating unit, the object to be heated immediately below the center part between adjacent heating units. The reduction of the infrared radiation intensity in the object can be kept within 30%. By limiting the decrease in infrared radiation intensity to within 30%, as shown in the relationship between the heat distribution ripple and the temperature of the object to be heated in FIG. 9, in the object to be heated immediately below the center of the horizontal part of the incandescent lamp of the heating unit. Compared with temperature, the temperature fall in the to-be-heated object just under the center part between adjacent heating units can be kept within 10 degreeC.

FIG. 8 shows a heating apparatus configured by combining a plurality of heating units, and a spacing b between filaments that are the light emitting portions 101 of adjacent incandescent lamps in each heating unit and the light emitting portions of the horizontal portion 10 of the incandescent lamp. It is a figure which shows the relationship between the filament which becomes 101, and the distance c between to-be-heated objects.
Here, the relationship between the separation distance b and the distance c is set to c / b ≧ 1/3. By setting in such a relationship, with respect to the infrared radiation intensity (100%) of the object to be heated just below the center part of the horizontal part of the incandescent lamp, the object to be heated just between the center parts of the horizontal parts of the adjacent incandescent lamps. The reduction of the infrared radiation intensity in the object can be kept within 30%. By reducing the infrared radiation intensity within 30%, as shown in the relationship between the heat distribution ripple and the temperature of the object to be heated in FIG. 9, compared with the temperature of the object to be heated just below the center of the horizontal part of the incandescent lamp. Thus, the temperature drop in the object to be heated immediately below the center between adjacent heating units can be kept within 10 ° C.

FIG. 10 is a view of the space between the incandescent lamps 1 and 1 of adjacent heating units as viewed from the heated object side in a heating apparatus configured by combining a plurality of heating units.
In the figure, reference numeral 13 denotes a light shielding plate provided in the vicinity of between the vertical portions 11 and 11 of the incandescent lamps 1 and 1 so that light is not irradiated to the sealing portion of the incandescent lamps 1 and 1.
By providing the light shielding plate 13, no light is irradiated to the sealing portion of the incandescent lamp 1, so that a temperature rise in the sealing portion can be prevented and damage can be prevented.

FIG. 11 is an enlarged view of the curved portion 12 of the tubular arc tube of the incandescent lamp 1 shown in FIGS. 2 and 3.
In the figure, 14 is a filament, 15 is a supporter ring that supports the filament 14, 16 is a supporter ring 15 provided in the bent portion 12, and the inner wall of the bent portion forming contact with the inside of the bent portion 12, 17 is a bent portion. The supporter ring 15 provided in the portion 12 is a bent portion formation opposite center side inner wall separated from the outside of the bent portion 12.
As shown in the figure, the supporter ring 15 provided in the curved portion 12 is substantially in contact with the curved portion forming central side inner wall 16 inside the curved portion 12 and separated from the outer curved portion forming counter-center side inner wall 17. Thus, even if the incandescent lamp 1 is turned on and the filament 14 expands due to thermal expansion, the supporter ring 15 becomes free and deformation of the filament 14 can be prevented. Here, for example, the valve inner diameter is φ8, and the supporter diameter is φ7.5.

  As shown in the figure, when the radius of curvature of the curved portion 12 is R1 (mm) and the interval between the supporter rings 15 provided in the curved portion 12 is S1 (mm), S1 / R1 ≦ 0. Set to 8. By setting such a relationship, even when the filament 14 between the supporter rings 15 is linearized, the gap between the bent portion forming center side inner wall of the bent portion 12 and the filament 14 can be maintained at 1 mm or more. 14 does not approach the inner wall of the bent portion 12 at the bent portion formation center side, and the temperature rise of the arc tube at the bent portion 12 can be avoided. Here, for example, R1 = 25 mm, S1 = 20 mm, the valve inner diameter is φ10, and the filament outer diameter is 1 mm.

It is a figure which shows the arrangement structure of the heating unit of the heating apparatus which concerns on this invention. It is a figure which shows the detailed structure of 1st heating unit A1, A2 shown in FIG. It is a figure which shows the detailed structure of 2nd heating unit B1 shown in FIG. It is a figure which shows the heating apparatus which has arrange | positioned three 2nd heating unit B1-B3 between 1st heating unit A1 and 1st heating unit A2. It is a figure which shows the heating apparatus which has arrange | positioned eight 2nd heating unit B1-B8 between 1st heating unit A1, A2 and 1st heating unit A3, A4. It is a figure which shows the heating apparatus comprised combining nine 3rd heating unit C1-C9 which has one lighting control area | region. It is a figure which shows the relationship between the separation distance a between the filaments used as the light emission part of the incandescent lamp of an adjacent heating unit, and the distance c between the filament used as the light emission part of the horizontal part of an incandescent lamp, and a to-be-heated material. . The figure which shows the relationship between the separation distance b between the filaments which become the light emission part of the adjacent incandescent lamp in each heating unit, and the distance c between the filament which becomes the light emission part of the horizontal part of an incandescent lamp, and a to-be-heated material. It is. It is a figure which shows the relationship between a heat distribution ripple and to-be-heated material temperature. It is the figure which looked at between the incandescent lamps of an adjacent heating unit from the to-be-heated material side. It is the figure which expanded and showed the curved part of the incandescent lamp shown to FIG. 2 and FIG. It is a figure which shows the heating apparatus which concerns on a prior art.

Explanation of symbols

A1, A2 First heating units B1-B8 Second heating units C1-C9 Third heating units E, F, G, K, L, M Lighting control regions H, I, J of the first heating unit Illumination control areas N, O, P of the heating unit 2 Power feeding parts L1, L3 Length of the lighting area L2 of the power feeding parts N, P Length L4, L5 of the lighting area of the power feeding part O Adjacent to the horizontal part a Distance c between filaments serving as light emitting portions of the incandescent lamp of the heating unit Distance b between filaments serving as light emitting portions of the horizontal portion of the incandescent lamp and the object to be heated b Light emitting portions of the adjacent incandescent lamp Separation distance between filaments 1 Incandescent lamp 10 Horizontal portion of tube-type arc tube,
DESCRIPTION OF SYMBOLS 101 Light emitting part of filament of horizontal part 11 Vertical part of tubular arc tube 111 Light emitting part of filament of vertical part 12 Curved part of tubular arc tube 13 Light shielding plate 14 Filament 15 Supporter ring 16 Supporter is in contact with the inside of the bent part Curved part formation inner wall 17 to be bent The supporter ring is separated from the outside of the bent part, and the bent part formation inner wall

Claims (7)

A filament is arranged inside the tube-type arc tube, the horizontal portion of the tube-type arc tube forming the light-emitting portion, and the tube-type arc tube extending from both ends of the horizontal portion through the curved portion of the tube-type arc tube A plurality of incandescent lamps formed in a substantially U-shape composed of vertical portions are arranged so that the horizontal portions are parallel to constitute a heating unit,
At least three of the heating units are arranged side by side in the direction in which the horizontal portion of the incandescent lamp of each heating unit extends, and each of the heating units is independently in a direction orthogonal to the horizontal portion of the incandescent lamp. A heating device that is divided into regions that can be lit. A filament is arranged inside the tube-type arc tube, the horizontal portion of the tube-type arc tube forming the light-emitting portion, and the tube-type arc tube extending from both ends of the horizontal portion through the curved portion of the tube-type arc tube A plurality of incandescent lamps formed in a substantially U-shape composed of vertical portions are arranged so that the horizontal portions are parallel to constitute a heating unit,
At least three or more heating unit groups arranged side by side in the direction in which the horizontal part of the incandescent lamp of the heating unit extends are further arranged side by side in a direction orthogonal to the horizontal part of the incandescent lamp of each heating unit. In addition, a heating apparatus is characterized in that each of the heating units can be independently controlled to be lit.   The heating apparatus according to claim 1 or 2, wherein a light emitting part is formed in a vertical part of the tube type light emitting tube.   The heating device according to any one of claims 1 to 3, wherein a heating region formed by all the heating units is formed in a rectangular shape.   The light-shielding plate is provided in the vicinity of the vertical part of the incandescent lamp of the adjacent heating unit so as not to irradiate light to the sealing part of the incandescent lamp. The heating device according to Item. A filament is arranged inside the tube-type arc tube, the horizontal portion of the tube-type arc tube forming the light-emitting portion, and the tube-type arc tube extending from both ends of the horizontal portion through the curved portion of the tube-type arc tube In an incandescent lamp formed in a substantially U-shape consisting of a vertical part,
A supporter ring that supports the filament is disposed in the curved portion so as to contact a curved portion formation center inner wall of the curved portion and to be separated from a curved portion formation inner side wall of the curved portion. Incandescent lamp. A filament is arranged inside the tube-type arc tube, the horizontal portion of the tube-type arc tube forming the light-emitting portion, and the tube-type arc tube extending from both ends of the horizontal portion through the curved portion of the tube-type arc tube In an incandescent lamp formed in a substantially U-shape consisting of a vertical part,
The relationship between R1 and S1 is S1 / R1 ≦ 0.8, where R1 is the radius of curvature of the curved portion and S1 is the spacing of the supporter ring that supports the filament provided in the curved portion. Features an incandescent lamp.

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