JP4190401B2 - High intensity discharge lamp house storage device - Google Patents

Description

  The present invention relates to improvement of a high-intensity discharge lamp, a high-intensity discharge lamp house, and a high-intensity discharge lamp house storage device using a curved tube discharge lamp such as an ultra-high pressure mercury lamp, and more particularly to a high-intensity discharge lamp having a large cooling effect.

A high intensity discharge lamp (hereinafter referred to as HID) generally has a tube wall load of 3 × 10 ⁻⁴ W · m ⁻² or more that is stabilized by the arc temperature of the arc of the arc tube that emits light. It is defined as a hot cathode discharge lamp and generally refers to a high-pressure mercury lamp, a metal halide lamp, or a high-pressure sodium lamp.

The high-pressure mercury lamp emits light by discharge in mercury vapor with a vapor partial pressure of 10 ⁵ Pa or more during lighting, and the metal halide lamp emits light by discharge in a mixture of metal vapor and halide dissociation products, and high-pressure sodium The lamp emits light by discharge in sodium vapor having a vapor pressure of about 10 ⁴ Pa during lighting.

The present inventor proposed in Patent Document 1 a curved tube discharge lamp in which the above-described high-intensity discharge lamp is made ultra-high pressure, the lighting pressure is about 2 × 10 ⁷ Pa, and the glass tube is formed in an inverted U shape. Yes.

  FIG. 9 shows a high-intensity discharge lamp disclosed in Patent Document 1. The structure of the high-intensity discharge lamp M composed of a high-pressure mercury lamp will be briefly described as an inverted U-shape that forms a discharge space 22 therein. A tubular body 21 made of a quartz glass tube or the like that is curved is provided, and rod-like discharge electrodes 23L and 23R made of, for example, tungsten wire are provided at both ends of the tubular body 21 so as to penetrate on the tube axes at both ends of the tubular body 21. And hermetically sealed.

  Further, at both end portions of the tube body 21, constricted portions 24L and 24R are protruded from the tube body 21 at positions where necessary intervals are maintained from the respective ends, and glass portions are projected from the constricted portions 24L and 24R. Mercury reservoirs 25L and 25R filled with mercury 26L and 26R are formed between the sealing portions at each end of the tube body 21. Each of the discharge electrodes 23L and 23R has an inner end protruding from the mercury 26L and 26R at the tube body 21 and is connected to a lead formed by the outer ends of the discharge electrodes 23L and 23R or to the outer end. The leads 27L and 27R are led out of the tube body 21.

  Further, at both ends of the high-intensity discharge lamp M, a base 28 made of metal or synthetic resin for electrical connection with other parts and mechanical reinforcement is provided. The base 28 is provided with through holes 29L and 29R into which both end portions of the tube body 21 are inserted, and leads 27L and 27R of the discharge electrodes 23L and 23R are inserted through the through holes 29L and 29R from the lower end of the base 28, for example. Derived. The through holes 29L and 29R are filled with an adhesive 30, for example, an insulating adhesive when the base 28 is conductive, and the tube body 21 is mechanically held by the base 28.

  According to the above-described configuration, since the discharge space 22 is physically disposed above the mercury reservoirs 25L and 25R at both ends, the liquefied mercury 26L and 26R is not only surface tension but also quickly due to its own weight in repeated evaporation and condensation of mercury. In addition, since the mercury reservoirs 25L and 25R return to each other, it is possible to drastically reduce the intake of rare gas, thereby effectively reducing the generation of bubbles, and the fact that the tube body 21 is bent is the base. 28, the terminals of both electrodes can be led out, so that the connection with the external circuit is simplified, and both ends of the tube body 21 are mechanically integrated by the base 28 to produce a reinforcing effect. 21 damage accidents are drastically reduced. Also, the overall size and size can be reduced. Furthermore, there is an advantage that a light distribution can be easily obtained as compared with the case where the high-intensity discharge lamp is linear.

  Further, in the case of using an inverted U-shaped high-intensity discharge lamp as described above as an exposure or printing light source for a cathode ray tube phosphor, shadow mask, printing plate, printed circuit board, IC lead frame, etc. As shown in FIG. 11, a high-intensity discharge lamp house storage device is used. Such a high-intensity discharge lamp house storage device has been previously proposed as Patent Document 2 by the present applicant.

  10 and 11 show a plan view showing an embodiment presented in Patent Document 2 and a cross-sectional view taken along line AA in FIG.

  10 and 11, reference numeral 31 denotes a lamp house base, which is positioned on the base by providing pin holes 31a at four corners of the lamp house base and fitting guide pins. A screw hole 31b and a concentric window hole 31c having a diameter slightly smaller than that of the screw hole 31b are formed on the upper surface of the lamp house base 31, and further, a lamp having a circular arc tip inward from the right side surface. A storage portion 31d is formed. The lamp housing portion 31d is continuously arranged below the window hole 31c.

  A disc-shaped partition plate 32 forming a horseshoe-shaped lamp storage portion 31d is fixed by a screw 33 at the center of the tip arc portion of the lamp storage portion 31d. As a result, a substantially semicircular bent tube storage portion is formed in the lamp storage portion 31d, and flow paths 31e and 31f are formed between the lamp storage portion 31d and the outer surface of the lamp house base 31 at this end portion, respectively. Has been.

  On the other hand, for example, the high-intensity discharge lamp M made of a high-pressure mercury lamp, which is formed in an inverted U shape, is disposed in the horseshoe-shaped lamp housing portion 31d, and the socket of the base 28 described in FIG. A flange 28a is screwed to the lamp house base 31 through an O-ring 34 in an airtight manner. Incidentally, 35 is a terminal screwed to the flange, and 27L and 27R are leads of the high-intensity discharge lamp M drawn from the terminal.

  Further, a face plate 36 made of glass is fitted into the window hole 31 c, and a ring 38 is provided on an outer edge portion of the face plate 36 with an O-ring 37 interposed therebetween. By screwing the frame ring 39 into the screw hole 31b, the ring 38 is pushed downward to compress the O-ring 37, and the window hole 31c is kept airtight.

In such a configuration, when cooling water flows from the channel 31f, the water passes around the high-intensity discharge lamp M and flows out from the channel 31e, and the high-intensity discharge lamp M is water-cooled. When the leads 27L and 27R are connected to the power source, a high voltage is applied between the discharge electrodes 23L and 23R, and a discharge occurs in the tube body 21 so that the inverted U-shaped high-intensity discharge lamp M emits light as a light source. It was.
Japanese Examined Patent Publication No. 6-30240, (page 3, Fig. 1) Japanese Examined Patent Publication No. 1-14572, (page 2, FIGS. 3 and 4)

However, in the conventional high-intensity discharge lamp in which the tubular body is formed in a substantially inverted U shape described with reference to FIGS. 9, 10 and 11, X and Y are axes orthogonal to each other on a horizontal plane, and Z is orthogonal to these. Assuming that the axis in the vertical direction is the plane formed by the XY axes, the plane passing through the two axial centers of the tube of the discharge space portion and the plane passing through the axis of the pair of discharge electrodes are substantially the same plane. Are arranged horizontally (see FIG. 10).
However, if the discharge space of the high-intensity discharge lamp is installed horizontally, the discharge electrode will also be horizontal, and even if the high-intensity discharge lamp is bent, the evaporated mercury can be returned by gravity into the mercury reservoir. There was an inconvenience.
In addition, the cooling of the high-intensity discharge lamp in the conventional high-intensity discharge lamp house storage device is performed by flowing the cooling water in one direction so as to pass around the high-intensity discharge lamp M. Although the pipe body is well cooled, the cooling water is gradually warmed and the temperature rises at the outlet, so that the pipe near the outlet is not sufficiently cooled.

  In view of this point, the present invention can sufficiently secure the cooling effect of the tube, and even when the discharge space of the high-intensity discharge lamp is used substantially horizontally, there is less risk of bubbles entering the mercury reservoir and cooling. An object of the present invention is to propose a high-intensity discharge lamp, a high-intensity discharge lamp house, and a high-intensity discharge lamp house storage device that are highly effective.

  The high-intensity discharge lamp of the present invention comprises a straight tube portion having a pair of discharge electrodes on both ends with a discharge space in the middle portion of the tube, and a curved tube portion in which the discharge space in the middle portion of the tube is substantially curved. A high-intensity discharge lamp having an angle formed by a plane passing through an axis of a substantially curved tubular tube portion forming a discharge space and a surface passing through an axis of a straight tube portion having a pair of discharge electrodes is a predetermined angle. The high-intensity discharge lamp is characterized by having a shape that is inclined so as to form a corner.

  According to the high-intensity discharge lamp of the present invention configured as described above, the angle formed by the surface passing through the axis of the curved tube portion of the high-intensity discharge lamp and the surface passing through the axis of the straight tube portion is a predetermined one. Since the straight tube part with the pair of discharge electrodes can be inclined upwards, there is less risk of bubbles entering the mercury reservoir, and the size of the light source that irradiates the exposure surface can be freely set, and the luminance distribution A uniform light source can be obtained.

A first high-intensity discharge lamp house according to the present invention includes a straight tube portion having a pair of discharge electrodes at both ends sandwiching a discharge space in the middle portion of the tubular body, and a curved shape in which the discharge space in the middle portion of the tubular body is a substantially curved tube. A high-intensity discharge lamp having a tube portion, the lamp house having a plurality of holes for supplying cooling water at the bottom of a substantially annular groove that houses the high-intensity discharge lamp and serves as a cooling water channel, A curved tube portion having a curved discharge space of a high-intensity discharge lamp is cooled through a plurality of holes formed in a substantially annular groove serving as a cooling channel for the lamp house.
The second high-intensity discharge lamp house of the present invention has a shape in which the angle formed by the surface passing through the axis of the bent tube portion and the surface passing through the axis of the straight tube portion is inclined to a predetermined angle. It is.

  With this configuration, according to the high-intensity discharge lamp house of the present invention, the cooling of the high-intensity discharge lamp is performed by blowing cooling water from the through hole at the bottom of the substantially curved groove. Since a plurality of portions of the curved pipe portion are simultaneously cooled with cold water, the temperature variation of the pipe body itself is suppressed as a whole, and the cooling effect can be improved.

The high-intensity discharge lamp house storage device of the present invention includes a straight tube portion having a pair of discharge electrodes at both ends with a discharge space at the middle portion of the tube, and a curved portion in which the discharge space at the middle portion of the tube has a substantially curved shape. A plane that passes through the axis of the substantially curved tubular part that forms the discharge space and a plane that passes through the axis of the straight pipe part having the pair of discharge electrodes form a predetermined angle. and high-intensity discharge lamp containing the formed mercury to have, have annular grooves for accommodating the high-intensity discharge lamp containing the mercury, the high-intensity discharge lamp containing the mercury in the bottom of the groove A high-intensity discharge lamp house provided with a plurality of holes for supplying water to be cooled, and a base for fixing the high-intensity discharge lamp house.

  With this configuration, according to the high-intensity discharge lamp house storage device of the present invention, light can be irradiated with the discharge electrodes of the high-intensity discharge lamp arranged upwards, so that the cooling effect can be enhanced and a desired light distribution can be obtained. A uniform irradiation surface can be obtained.

  According to the high-intensity discharge lamp, the high-intensity discharge lamp house, and the high-intensity discharge lamp house storage device of the present invention, the discharge electrode is substantially perpendicular to the plane formed by the curved discharge space (Z-axis direction). The high-intensity discharge lamp can effectively avoid the generation of bubbles in the mercury reservoir while the high-intensity discharge lamp is lit, and the high-intensity discharge lamp can be efficiently cooled, resulting in a long-life, high-intensity A discharge lamp can be obtained.

  Hereinafter, an example of the best mode for carrying out the high-intensity discharge lamp, the high-intensity discharge lamp house, and the high-intensity discharge lamp house storage device of the present invention will be described with reference to FIGS.

In the high-intensity discharge lamp of this example, the bending angle formed between the surface passing through the axis of the straight tube body of the pair of discharge electrodes and the surface passing through the axes of at least two substantially curved tubes forming the discharge space is θ. Then, in the conventional shape shown in FIG. 9, there is a substantially straight tubular body forming a discharge space and a pair of straight tubular bodies for accommodating the discharge electrodes, θ≈180 ° (arranged in substantially the same plane). On the other hand, as shown in FIGS. 8A and 8B, it is formed at an angle of θ≈90 ° (substantially perpendicular).
In the following description of FIGS. 1 to 8, the same reference numerals are given to portions corresponding to FIGS. 9 to 11, and the description thereof is omitted.

  FIG. 1 is a perspective view showing a form of a high-intensity discharge lamp M as an example of a high-intensity discharge lamp, in which the shape of a tubular body forming a discharge space is substantially curved, and FIG. 1A is a substantially rectangular shape. FIG. 1B is of a substantially Ω shape. In the following, an example of the form of the high-intensity discharge lamp M will be described with a substantially square shape shown in FIG. 1A. However, it may be of the substantially Ω shape shown in FIG. 1B, or may be of a spiral shape or a comb tooth shape as long as the axial center of the main part of the discharge space is arranged on substantially the same plane. Good.

  As shown in FIG. 1A, a tube body 21 constituting the high-intensity discharge lamp M is a substantially curved tubular portion 21a made of quartz glass or the like and formed into a substantially rectangular shape, and a pair of tubes connected to both ends of the curved tube portion. It is formed of a straight pipe portion 21b.

  As shown in FIG. 1A, the curved pipe portion 21a of the tubular body 21 is formed by connecting one long side pipe and two short side pipes with a curved pipe having four predetermined curvatures so as to have a substantially rectangular shape. It is made like a shape. As a result, the bent tube portion 21a has a substantially C shape with a portion facing the long side tube being vacant.

Further, as shown in FIG. 1A, two straight pipe portions 21b and 21b arranged so as to be substantially parallel (paired) to the opening of the substantially C-shaped curved pipe portion 21a are provided with a predetermined curvature. It forms so that it may be integrated via a curved pipe.
In this integration, as shown in FIG. 1A, a bending formed by a surface passing through the axis of the pair of straight tube portions 21b and 21b and a surface passing through the axis of the curved tube portion 21a serving as the discharge space 22 of the tube body 21 is formed. The angle θ is arranged to form an angle of approximately 90 °. Further, as shown in FIG. 1A, the distance between the axial centers of the pair of straight pipe portions 21b and 21b is made smaller (narrower) than the dimension of the long side pipe portion viewed from the axial center of the curved pipe portion 21a. .
Here, the actual forming process of the tubular body 21 is performed by heating the quartz glass in a pipe shape at a predetermined position and bending it with a desired curvature.

As shown in FIG. 1A, the pair of straight tube portions 21b and 21b at both ends of the formed tube body 21 are provided with rod-like discharge electrodes 23L made of a tungsten wire as shown in FIG. 23R penetrates and stands up and is sealed at the end of the pair of straight pipe portions 21b and 21b.
Then, constricted portions 24L and 24R are formed to protrude on the inner wall of the tube body 21 in the vicinity of the pair of discharge electrodes 23L and 23R, as in FIG. Then, mercury is injected between the pair of sealing portions of the tube body 21 and the constricted portions 24L and 24R to form mercury reservoirs 25L and 25R. In this way, the tube body 21 of the high-intensity discharge lamp M is formed from a quartz glass tube.

  However, the tube body 21 is in a state in which an electrode is protruded from a quartz glass tube in which mercury is sealed, and is difficult to handle. Therefore, reinforcement is performed as shown in FIG. 1A.

  As shown in FIG. 1A, the cylindrical base 47 made of an insulating synthetic resin for electrical insulation and mechanical reinforcement is provided at the sealing portion of the pair of straight pipe portions 21b and 21b of the pipe body 21 as shown in FIG. 1A. Further, a cylindrical base 47 that holds the sealing portions of the pair of discharge electrodes 23L and 23R is integrated with a base 28b that is formed in a substantially oval shape with a thick plate shown in FIG. 1A.

  As shown in FIG. 1A, the straight tube portions 21b and 21b provided with the discharge electrodes 23L and 23R are inserted and fixed to the cylindrical base 47 and the base 28b, and from the lower surface of the base 28b through the insulating terminal 35. Then leads 27L and 27R are derived.

  Since it comprised as mentioned above, according to the high-intensity discharge lamp M of this example, as shown to FIG. 1A, the curved pipe part which passes along the at least 2 axial center of the substantially curved tubular body 21 which makes the discharge space 22 is shown. The bending angle θ formed by the horizontal plane of 21b and the vertical plane passing through the axis of the pair of discharge electrodes 23L and 23R is approximately 90 °, so that the straight tube portions 21b and 21b having the pair of discharge electrodes 23L and 23R are oriented substantially vertically. Then, the curved tube portion 21a of the discharge space 22 is arranged substantially horizontally.

  However, in the high-intensity discharge lamp M of this example, as shown in FIG. 1A, when the curved tube portion 21a is substantially horizontal, even if the mercury has a large surface tension, it is caused by the gravity of mercury condensed on the tube wall of the curved tube portion 21a. Since natural fall cannot be expected, the tube body 21 is inclined and installed so that the condensed mercury particles move by their own weight to the lower side.

  At this time, in order to effectively avoid the intrusion of bubbles into the mercury reservoir, as disclosed in the aforementioned Patent Document 1, the axial centers of the straight tube portions 21b and 21b constituting the discharge electrodes 27L and 27R are arranged. The inclination of the passing surface may be larger than about 30 ° with respect to the horizontal direction, that is, smaller than about 60 ° with respect to the vertical direction.

  FIG. 8 shows a high-intensity discharge lamp in which a plane passing through the axis of the straight tube portions 21b and 21b having the discharge electrodes 23L and 23R and a plane passing through the axis of the curved tube portion 21a serving as a discharge space have a bending angle θ. FIG. 8A shows the discharge space of the tube 21 with the bending angle θ≈90 °, and FIG. 8B shows the discharge space of the tube 21 with the bending angle θ≈90 °. The angle formed by the plane passing through the axis of the curved pipe portion 21a and the reference horizontal plane ψ = 5 °, and the angle formed by the plane passing through the axis of the straight pipe portion 21b of the tubular body 21 and the reference vertical plane. When tilted to φ = 5 °, FIG. 8C shows the angle formed by the plane passing through the axis of the curved tube portion 21a forming the discharge space 22 of the tube body 21 and the reference horizontal plane with the bending angle θ≈120 °. = 5 °, and the angle between the surface passing through the axis of the straight tube portion 21b of the tube body 21 and the reference vertical surface is inclined to φ = 25 ° It is a side view at the time of making it slant.

  In this case, in FIG. 8B, the condition that the inclination of the axial center of the straight tube portions 21b and 21b having the discharge electrodes 23L and 23R in Patent Document 1 is greater than about 30 ° with respect to the horizontal direction is 0 ° <φ <60. °. As shown in FIG. 8A, when the straight tube portions 21b and 21b having the discharge electrodes 23L and 23R are placed substantially vertically, the bent tube portion 21a becomes substantially horizontal, so that the condensed mercury returns to the mercury reservoirs 25L and 25R. I can't expect it. However, as shown by the solid line in FIG. 8B, the bent pipe portion 21a is slightly inclined, for example, about ψ≈5 °, so that the mercury can be returned to the mercury reservoir by its own weight. Then, the high-intensity discharge lamp M can be stably lit up to the maximum inclination angle φ≈60 ° (indicated by a two-dot chain line in FIG. 8B) that can avoid the entry of bubbles into the mercury reservoirs 25L and 25R.

  However, in the high-intensity discharge lamp M with θ≈90 ° shown in FIGS. 1, 8A and 8B, even if the straight tube portions 21b and 21b are inclined at an angle φ≈60 °, the inclination angle ψ of the bent tube portion 21a is as follows. ≈60 ° (5 ° <ψ <60 °), and even if the straight tube portions 21b and 21b are tilted to the limit, the irradiation direction of the lamp cannot be made horizontal (vertical state in FIG. 8B). Therefore, the surface passing through the axis of the bent tube portion 21a of the tube body 21 with the bending angle θ≈120 ° is raised so as to be substantially vertical, and the irradiation direction of the lamp is more horizontal (as shown in FIG. 8C). In FIG. 8C, the vertical state can be approached. In this case, the high-intensity discharge lamp M in which the bending angle θ is 90 ° <θ <180 ° can be selected.

  8C, the bending angle θ formed by the horizontal plane passing through the axis of the curved pipe portion 21a forming the discharge space 22 of the high-intensity discharge lamp M and the plane passing through the axis of the straight pipe portions 21b and 21b in FIG. Is approximately 120 °. In this case, as shown by a two-dot chain line in FIG. 8C, the curved tube portion 21a forming the discharge space 22 is changed from substantially horizontal, for example, ψ≈5 ° to approximately vertical ψ≈90 ° (5 ° <ψ < The high-intensity discharge lamp M can be maintained in a stable lighting state at an inclination of 90 °.

  The conventional high-intensity discharge lamp M in which the bent tube portion 21a and the straight tube portions 21b and 21b are arranged on substantially the same plane is 30 ° <ψ <90 ° and is close to the horizontal plane (ψ≈5 °). Thus, the high-intensity discharge lamp M having a higher degree of freedom in the irradiation direction can be obtained as compared with the case where the irradiation cannot be performed in the substantially upward direction.

  That is, in the high-intensity discharge lamp M of FIG. 8A and FIG. 8B in which θ≈90 °, 5 ° <ψ <60 °, and in the high-intensity discharge lamp M of FIG. 8C in which θ≈120 °, 5 ° < When ψ <90 °, the bent tube portion 21a can be installed so as to be closer to a horizontal plane, so that it can be irradiated almost directly above, and a high-intensity discharge lamp M having a desired bending angle θ can be obtained. A high-intensity discharge lamp M suitable for a wide range of irradiation angles can be obtained.

  Such a high-intensity discharge lamp M is used with the curved tube portion 21a inclined according to the irradiation angle. In the high-intensity discharge lamp M with the bending angle θ≈90 ° in this example, the lamp house itself incorporating the high-intensity discharge lamp M is tilted so as to be rotatable with respect to the axis so as to be directed in a predetermined direction. The high-intensity discharge lamp M having the tubular body 21 formed with the bending angle θ so that the angle θ between the curved tube portion 21a and the straight tube portions 21b and 21b becomes a desired direction from the beginning. A lamp house adapted to the above may be manufactured and installed so as to face a predetermined direction.

  As described above, the shape and bending angle θ of the substantially curved tubular body 21 of the high-intensity discharge lamp M can be variously changed without departing from the gist of the present invention.

  The high-intensity discharge lamp house includes a high-intensity discharge lamp M and a lamp house 50 as shown in FIGS. 2A and 2B. As shown in FIGS. 3, 4A and 4B, the lamp house 50 has an annular ring 50a having an outer diameter of 155 mm, an inner diameter of 125 mm, and a thickness of 10 mm on an upper portion of a cylindrical block 50a-1 having a diameter of 125 mm and a thickness of 65 mm. -2 is provided with a flange 50k integrally joined. Then, a substantially pentagonal protrusion 50b constituting a partition of the cooling water channel is left at a substantially central position on the upper surface of the cylindrical block 50a-1 of the lamp house 50, and the cylindrical block 50a-1 is provided around the pentagonal protrusion 50b. The substantially C-shaped groove | channel 50c curved in the bottom face direction is formed.

  As shown in the plan view of FIG. 4A, the C-shaped groove 50c is formed corresponding to the substantially square curved tube portion 21a of the high-intensity discharge lamp M described above. Then, in the region excluding the portion where the base 28b of the high-intensity discharge lamp M shown in FIG. 1A is provided and the central pentagonal protrusion 50b portion, eleven locations on the processing center line indicated by the two-dot chain line in the central portion of FIG. It is processed with. The processing at this time forms a substantially bowl-shaped concave surface portion 50s by feeding and moving a tool having a desired substantially bowl-shaped processing blade shape on the upper surface of the lamp house 50 from the upper surface while rotating it. By processing the above 11 locations, a substantially C-shaped groove 50c is formed. The substantially bowl-shaped concave surface portion 50 s is formed with a curvature of about 15 mmR from 1.5 mm below the upper surface of the lamp house 50.

  As described above, among the eleven concave surface portions 50s provided in the lamp house 50, the concave surface is formed at the nine positions except the two front positions for providing the base 28b of the high-intensity discharge lamp M shown in FIGS. 4A and 4B. As shown in FIG. 4B, nine through-holes 50j, 50j,... Are provided downward from the deepest valley portion of the portion 50s as the bottom surface of the lamp house 50. Then, dishing is performed on the bottom surface serving as the outlet. Nine through holes 50j, 50j,... From this bottom surface to the valley of the concave surface portion 50s serve as cooling water inflow paths.

  Further, as shown in FIGS. 3, 4A and 4B, a groove 50m for incorporating a sealing O-ring into a circular tubular shape is provided outside the C-shaped groove 50c in the upper flange 50k of the lamp house 50. . Then, six screw holes 50n, 50n,... For fixing the irradiation ring 52, which will be described later, are provided at approximately 60 ° intervals. Further, as shown in FIGS. 4A and 4B, five screw holes 50u, 50u,... For fixing a base 51 to be described later are drilled on the bottom surface of the lamp house 50 from the bottom surface to a predetermined depth. Set up.

  As shown in FIGS. 3 and 4B, the C-shaped groove 50c of the lamp house 50 in which the base 28b of the high-intensity discharge lamp M is provided is slightly similar to the shape of the base 28b as shown in FIGS. A large oval hole 50 d is formed from the upper surface side of the lamp house 50. 2B, when the base 28b of the high-intensity discharge lamp M is placed, the bent tube portion 21a of the high-intensity discharge lamp M is positioned above the C-shaped groove 50c. Are formed to have a predetermined height.

  Then, as shown in FIG. 4B, a small oval opening is provided at the bottom of the oval hole 50d so that the terminal 35 and the leads 27L and 27R can be inserted, thereby forming the flange 50e. As shown in FIGS. 4A and 4B, an O-ring groove 50g is provided on the upper surface of the flange 50e in a small oval shape that is substantially similar to the lower surface of the base 28b.

  As shown in FIG. 4A, two rectangular cross-sectional grooves 50 t and 50 t are provided facing the bottom surface of the lamp house 50 on the inner wall of the long axis of the oval hole 50 d of the lamp house 50. The lower ends of the two rectangular cross-sectional grooves 50t and 50t are drilled so as to be positioned above the upper surface of the flange 50e by the thickness of the base 28b. And one screw hole 50h is provided in the lower end surface of the two rectangular cross-sectional grooves 50t, 50t.

  Further, as shown in FIGS. 2A, 2B, and 3, from the outer wall of the lamp house 50, two holes 50p and 50p are formed substantially parallel to the oval hole 50d and communicated with the oval hole 50d. Yes. Then, two cylindrical tubes 50f and 50f are fixed to the outer wall of the lamp house 50 in an airtight manner so that one end is embedded and the other end protrudes at the outlets of the holes 50p and 50p. These cylindrical tubes 50f and 50f serve as drainage channels for cooling water.

  The lamp house 50 thus formed is mirror-finished on the surface of the concave portion 50s provided on the upper surface thereof, and then plated with nickel or the like to form a concave mirror in the substantially C-shaped groove 50c.

  Further, the partition plate 8 provided in the oval hole 50d of the lamp house 50 is made of a plate material such as a flat heat-resistant metal or plastic as shown in an exploded perspective view of FIG. The partition plate 8 has a width and thickness that do not cause backlash in the two rectangular cross-section grooves 50t and 50t facing each other, and the height is a dimension from the lower surface of the grooves 50t and 50t to the upper surface of the lamp house 50. To. Then, shallow grooves are provided in the longitudinal direction of the front and back surfaces, and two fixing holes 8a with countersunk holes are provided downward from the upper surface of the flat plate.

Hereinafter, a procedure for assembling the high-intensity discharge lamp house will be described with reference to FIGS. 1, 2B, and 7. FIG.
As shown in FIG. 2B, in the high-intensity discharge lamp house, an O-ring made of an elastic member such as a small diameter rubber (not shown) is incorporated in a groove 50g provided in the flange 50e on the bottom surface of the oval hole 50d of the lamp house 50. . Then, the high-intensity discharge lamp M is inserted into the oblong hole 50d from above with the lead 27L and 27R facing downward as shown in FIG. 1A, and the base 28b is inserted onto the flange 50e.

  Then, as shown in FIG. 7, the partition plate 8 is dropped from above along the rectangular cross-sectional grooves 50t and 50t of the lamp house 50, and the straight tube portion 21b having the discharge electrodes 23L and 23R of the pair of high-intensity discharge lamps M, It is incorporated so as to be disposed between 21b. Then, screws are inserted into the two fixing holes 8a and 8a with counterbore, the partition plate 8 and the lamp house 50 are screwed together, and the high-intensity discharge lamp M is fixed airtight without water leakage.

  In the high-intensity discharge lamp house configured as described above, the C-shaped groove 50c provided in the lamp house 50 serves as a cooling water flow path. Then, fresh cooling water is supplied from through holes 50j, 50j,... Provided in the deepest valley of the concave surface portion 50s forming the C-shaped groove 50c, and the curved tube portion of the high-intensity discharge lamp M is provided. A plurality of locations 21a are cooled simultaneously. As a result, particularly in the high-intensity discharge lamp M for high power, the tube wall at a high temperature is effectively cooled, variation in cooling is reduced, and a more stable high-intensity discharge lamp M for high power can be used. It becomes.

  The ultraviolet light emitted from the periphery of the tube 21 of the high-intensity discharge lamp M disposed in the concave surface portion 50s of the C-shaped groove 50c toward the back surface of the high-intensity discharge lamp M on the concave surface portion 50s side is The light can be scattered by the concave surface portion 50s of the concave mirror and irradiated in the forward direction.

The high-intensity discharge lamp house in this example is an example in which one high-intensity discharge lamp M is accommodated, but instead of this, a plurality of high-intensity discharge lamps M are mounted to improve the illuminance and the light distribution. Uniformity can also be achieved.
Further, the through holes 50j, 50j,... For the cooling water channel are simply inclined obliquely from the valley of the concave surface portion 50s of the C-shaped groove 50c of the lamp house 50 toward the side wall of the cylindrical block 50a-1. You may provide a through-hole and supply cooling water to a side wall via a pipe joint. In addition, a plurality of holes are provided in the diagonally downward direction from the valley of the concave surface portion 50s toward the center of the cylindrical block 50a-1, while a large-diameter hole is provided on the substantially central back surface of the cylindrical block 50a-1. The hole having the diameter may be communicated with the plurality of holes, and the cooling water may be supplied from the hole having the large diameter, and various changes can be made without departing from the gist of the present invention.

  In the high-intensity discharge lamp house storage device of this example, as shown in FIG. 7, the correction filter 53 and the face plate 54 are irradiated on the high-intensity discharge lamp house on which the high-intensity discharge lamp M is fixed by the partition plate 8. 52 is attached, and a base 51 is attached under the high-intensity discharge lamp house.

  The irradiation ring 52 is a ring as shown in FIG. 5, and a ring with a substantially isosceles triangular section is arranged inside a ring with a substantially rectangular section, as shown by a broken line in the figure. With the shape formed integrally, the inside of the ring forms the light irradiation window 52a. Then, an inclined surface 52b of approximately 45 ° is provided in the upper part inside the irradiation ring 52, and a step for attaching a correction filter 53 and a face plate 54 described later is provided in the lower part (see FIG. 11). Six holes 52d, 52d, ... with countersunk holes for fixing screws are formed outside the irradiation ring 52 at intervals of about 60 ° with respect to the center of the ring.

  As shown in the exploded perspective view of FIG. 7, the correction filter 53 has a concave or convex portion 53c, 53c,... On the surface of a quartz glass disk 53a, and a high-intensity discharge lamp M in the C-shaped groove 50c. This is arranged and formed in a substantially square shape so as to follow the shape of the curved pipe portion 21a. The concave portions or convex portions 53c, 53c,... On the surface of the disk 53a are formed in a circular dome shape to form a micro concave lens or a micro convex lens, thereby correcting the light source image of the high-intensity discharge lamp M. Then, as shown in FIG. 7, a face plate 54 made of a quartz glass disk 53a is disposed under the correction filter 53.

  As shown in FIG. 6, the base 51 has a chorus-like shape from a disk 51 a having a diameter of, for example, 125 mm × thickness of 30 mm. Then, the terminal 35 of the substantially rectangular high-intensity discharge lamp M and the reliefs 50p of the leads 27L and 27R are formed from the side wall surface 51b of the string portion toward the center of the disk 51a.

  A cooling water flow path 51 c is provided in the disk 51 a of the base 51. As shown in FIG. 6, the flow path 51c is composed of T-shaped grooves 51c-1, 51c-2, and 51c-3 on the upper surface of the disk 51a, and the lower ends of the vertical bars of the three T-shaped grooves are provided at one location. It is provided in three directions, upper, left and right, to match. And the groove | channel of the horizontal bar part on three T-shapes is made to cover the countersunk opening of nine through-holes 50j, 50j, ... provided in the bottom face of the lamp house 50. FIG.

  Furthermore, a non-penetrating hole 51d-1 is provided in the downward direction that becomes the bottom surface of the base 51 from the groove bottom at the position where the lower ends of the T-shaped grooves 51c-1, 51c-2, 51c-3 coincide. Then, a hole 51d-2 is provided from the side surface parallel to the upper surface of the disk 51a toward the hole 51d-1, and a hole 51d-3 is provided from the side wall surface 51b of the disk 51a toward the hole 51d-2. Then, a water stop plug 51e is provided at the outlet of the hole 51d-2 on the side surface of the disk 51a, and a part of the cylindrical tube 51f is embedded and fixed on the side wall surface 51b serving as the outlet of the hole 51d-3 to add cooling water. The entrance.

  Further, an O-ring groove 51g is provided on the upper surface of the disk 51a of the base 51 so as to surround the T-shaped grooves 51c-1, 51c-2, 51c-3 as shown in FIGS. . Then, around the groove 51g, five through holes 51h, 51h,... Having counterbore on the bottom surface side of the disk 51a are provided. Further, a rotation shaft (not shown) is provided at the lower part of the base 51 so that it can be tilted and fixed.

  As shown in the exploded perspective view of FIG. 7, the high-intensity discharge lamp house storage device having such a configuration first has the high-intensity discharge lamp M incorporated in the lamp house 50 to form a high-intensity discharge lamp house.

  Next, a large-diameter O-ring (not shown) is incorporated in the groove 50m around the C-shaped groove 50c forming the concave reflecting mirror on the upper surface of the high-intensity discharge lamp house. In this state, as shown in FIG. 7, a face plate 54 is disposed on the upper surface, and a correction filter 53 is disposed thereon via a predetermined spacer. Then, as shown in FIG. 7, the irradiation ring 52 is covered from above, and the hole 52d of the irradiation ring 52 and the screw holes 50n, 50n,.

  Finally, an O-ring having a predetermined size (not shown) is installed in the groove 51g on the upper surface of the disk 51a of the base 51, and the bottom surface of the high-intensity discharge lamp house is placed from above, and through holes 51h, 51h,. , Screws are screwed into the screw holes 50u, 50u... Of the lamp house 50 to form a high-intensity discharge lamp house storage device. In the high-intensity discharge lamp house storage device, a water supply pipe is connected to the cylindrical tube 51 f of the base 51, and a drain pipe is connected to the cylindrical tubes 50 f and 50 f of the lamp house 50. Then, power supply wiring is connected to the leads 27L and 27R.

  The high-intensity discharge lamp storage device of this example is a rotating shaft (not shown) provided in the high-intensity discharge lamp house storage device itself, and the straight tube portion 21b of the discharge electrode of the high-intensity discharge lamp M is lower. The curved tube portion 21a of the discharge space 22 of the body 21 is installed such that the curved tube portion 21a has an inclination of, for example, about 5 ° or more with respect to the horizontal plane, and the curved tube portion 21a faces a predetermined direction.

  According to the high-intensity discharge lamp house storage device configured in this way, first, cooling water is injected into the cooling water cylindrical tube 51 f of the base 51. As a result, the cooling water passes through the holes 51d-3 and 51d-2, which become pipes in the disk 51a of the base 51, and the T-shaped grooves 51c-1, 51c-2 and 51c- from the hole 51d-1. Reach 3 and fill this part with water. At this time, since the base 51 and the lamp house 50 are hermetically sealed by the O-ring, water does not leak out.

  Next, as shown in FIGS. 3, 4A and 4B, the water filling the T-shaped groove 51c has nine through holes 50j, 50j,... -It rises up and it springs up from nine places of the deepest valley part of the concave surface part 50s, and fills the C-shaped groove 50c with cooling water. Then, the curved tube portion 21a around the discharge space 22 of the high-intensity discharge lamp M is cooled, and the cooled water descends along the pair of discharge electrodes 23L and 23R on both sides of the partition plate 8 to form the oblong hole 50d. Are discharged from the cylindrical tubes 50f and 50f through holes 50p and 50p provided on the inner surface of the tube.

  At this time, as shown in FIG. 2B, since the lamp house 50 and the face plate 54 are hermetically sealed by an O-ring disposed in the groove 50m, water does not leak out at the seal portion. The lamp house 50 and the base 28b of the high-intensity discharge lamp M are hermetically sealed by an O-ring disposed in the groove 50g on the upper surface of the flange 50e of the oblong hole 50d of the lamp house 50. Will not leak.

  In a state where a high voltage is applied to the leads 27L and 27R of the high-intensity discharge lamp M incorporated in this way and the lamp is lit while being cooled with cooling water around the tube body 21, the discharge space 22 is physically located at both ends. Disposed above the mercury reservoirs 25L and 25R, and the discharge electrodes 23L and 23R face upward. Therefore, in repeated mercury evaporation and condensation, the liquefied mercury 26L and 26R quickly returns to the mercury reservoirs 25L and 25R due to the surface tension and the own weight, so that the intake of rare gas can be drastically reduced. Generation can be effectively reduced. Then, the high-intensity discharge lamp M can be lit stably.

  At this time, since the tube body 21 is simultaneously cooled at a plurality of locations by the cooling water that has flowed out from the hole provided in the deepest valley of the concave surface portion 50s around the lighting tube body 21, the cooling water is unidirectionally In this case, the difference in water temperature between the inlet and the outlet becomes smaller, and the temperature variation of the tube body 21 itself can be suppressed, so that the cooling effect is improved.

  In this example, the cooling water is injected from one cylindrical tube 51f of the base 51 and drained from the two cylindrical tubes 50f and 50f provided in the lamp house 50, but instead of the base 51 Even if the number of water injections is increased by using two cylindrical tubes 51f, the cooling effect can be improved.

  Further, in the high-intensity discharge lamp house storage device of this example, the high-intensity discharge lamp M, which is mounted with the high-intensity discharge lamp M dropped directly below the lamp house 50, is installed in a tilted direction of light irradiation. Alternatively, the high-intensity discharge lamp M may be mounted obliquely so as to have a desired irradiation direction. In this case, the through-holes and the small holes provided in the lamp house are processed so as to be inclined with respect to the bottom surface. The

  The present invention is not limited to the above-described examples, and can be variously modified without departing from the gist of the present invention.

The example of embodiment of the high-intensity discharge lamp of this invention is shown, and as for the curved pipe shape of a tubular body, A is a perspective view of a substantially square shape, B is a perspective view of a substantially (omega) shape. The example of embodiment of the high-intensity discharge lamp house of this invention is shown, A is a top view, B is the partial cross section front view by the cross section SS. It is a perspective view which shows the example of the form of the lamp house which comprises FIG. 3 is a plan view, and B is a partially sectional front view of the lamp house of FIG. It is a perspective view which shows the example of the form of the irradiation ring which comprises this invention high-intensity discharge lamp house storage apparatus. It is a perspective view which shows the example of the form of the base which comprises this invention high-intensity discharge lamp house storage apparatus. It is a disassembled perspective view of the high-intensity discharge lamp house storage device of the present invention. FIG. 5 is a side view showing each form in which a plane passing through the axis of the straight tube portion and a plane passing through the axis of the curved tube portion of the high-intensity discharge lamp of the present invention have a bending angle θ. It is a sectional side view which shows the structure of the conventional high-intensity discharge lamp. It is a top view of the conventional high-intensity discharge lamp house storage apparatus. It is side sectional drawing of the conventional high-intensity discharge lamp house storage apparatus.

Explanation of symbols

  21... Tube, 21 a... Straight tube portion, 21 b... Curved tube portion, 22... Discharge space, 23 L, 23 R. House, 50c ... Curved groove, M ... High-intensity discharge lamp

Claims (1)

A straight tube portion having a pair of discharge electrodes at both ends with a discharge space in the middle portion of the tube body, and a curved tube portion in which the discharge space in the middle portion of the tube body is substantially curved, forming the discharge space. High brightness containing mercury formed such that a surface passing through the axis of the curved tube portion having a substantially curved tubular shape and a surface passing through the axis of the straight tube portion having the pair of discharge electrodes have a predetermined angle A discharge lamp;
A high groove having an annular groove for accommodating the mercury-containing high-intensity discharge lamp, and a plurality of holes for supplying water for cooling the mercury-containing high-intensity discharge lamp at the bottom of the groove. Brightness discharge lamp house,
A base for fixing the high-intensity discharge lamp house;
With a high intensity discharge lamp house storage device.

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