JP5928617B2 - Projector device for digital cinema movie theater - Google Patents

Description

  The present invention relates to a projector device for a digital cinema movie theater, for example, using a cinema complex.

Currently, in the movie industry, the number of screens in a complex movie theater called a “cinema complex” tends to increase.
In recent years, the movie industry has entered a period of great change from film to digital worldwide, and the digitization of movies has been rapidly progressing and high definition images have been provided.

  In a digital cinema by a cinema complex, it is possible to simultaneously display different ones using a plurality of digital cinema projectors, and it is possible to centrally manage the operations of the digital cinema projectors. That is, the projection that operates the projector 80 in the projection room Pr that is installed separately from the screening room (theatre space Sr) like a theater that distributes video information (movies) using a projection film shown in FIG. It is not necessary for an engineer to wait and work while checking the state of the projector 80 and the screen S. In a digital cinema using a cinema complex, for example, a network such as a LAN is used to display images on each digital cinema projector. A digital cinema is provided by sending a signal. In addition, in digital cinema, there is no need to install a projection room with sufficient space (work space), so even in a small-area theater, there is no loss of comfort for visitors. The theater space can be used effectively.

On the other hand, with the change in hardware, the structure of the theater itself is greatly changed, and it is considered to install a projector for digital cinema in a screening room (see, for example, Patent Document 1).
Thus, in general, in a projector for digital cinema, for example, a xenon short arc type discharge lamp with high input luminance is used as a light source in order to project an image on a large screen. For this reason, the cooling mechanism for the discharge lamp and the like are also integrated and the projector for digital cinema itself becomes very large. Therefore, when the digital cinema projector is installed on the floor as in Patent Document 1, for example, a sufficiently large space for equipment installation is required on the rear side of the audience seat.
In addition, in a projector for digital cinema, maintenance work such as lamp replacement is required to be performed periodically. For example, maintenance (workability) is required when installing a projector for digital cinema in a showroom. It is necessary to consider the space design in consideration of the noise and the exhaust for cooling the discharge lamp and the like.

For such problems, for example, Patent Document 2 and Patent Document 3 disclose a lift system for a projector that supports the projector by suspending it from the ceiling in order to make full use of the effective use of the theater space. . According to such a structure, it is expected that a sufficiently large space for visitors can be secured in the theater space, and a more comfortable space design can be realized.
However, the structure in which the projector for digital cinema is simply suspended from the ceiling and supported has the problem that the beauty of the theater is impaired.
Also, because the cooling air exhaust of the projector for digital cinema spreads in the theater space, problems such as the uncomfortable feeling of the hot air generated by the exhaust in the seats near the projector for digital cinema, and the operating sound of the cooling mechanism can occur in the theater space. As a result, there is a problem that visitors cannot fully enjoy the high-definition image of the digital cinema and the comfort is significantly impaired.

JP 2000-029137 A US Pat. No. 6,637,711 US Pat. No. 7,631,848

  The present invention has been made based on the circumstances as described above, and the object thereof is to enable effective use of the theater space without impairing the beauty of the theater space, and from the projector for digital cinema. It is an object of the present invention to provide a projector device for a digital cinema movie theater that can solve the problems related to the exhaust and noise and provide a more comfortable theater space.

A projector device for a digital cinema movie theater according to the present invention includes a housing that has an upper wall fixed to a ceiling portion of a theater space and that forms a sealed space inside, and an outer casing installed inside the housing. It is equipped with a projector for digital cinema equipped with a cooling mechanism consisting of a fan inside ,
The digital cinema projector has a cooling air introduction opening and an exhaust opening for cooling air related to the cooling mechanism formed on an outer casing thereof.
A cooling air supply path and an exhaust path for cooling the digital cinema projector are formed so as to extend to the outside of the apparatus through the upper wall of the housing in a state of being isolated from the theater space,
Inside the housing, a cooling air flow passage is formed through which cooling air for cooling the digital cinema projector is circulated ,
An exhaust opening of the digital cinema projector is connected to the exhaust path via an exhaust duct and an exhaust fan is provided in the exhaust path.
A cooling air supply fan is provided in the air supply passage so as to supply air to the digital cinema projector through the cooling air flow passage and the cooling air introduction opening.
The exhaust fan and the cooling air supply fan are arranged behind the ceiling of the theater space .

  According to the projector device for a digital cinema movie theater of the present invention, basically all the components such as the projector for the digital cinema are accommodated in the casing, so that the theater space can be seen without deteriorating the beauty of the theater space. It can be installed in the space and the theater space can be used effectively. In addition, cooling air is supplied from the outside of the apparatus to the digital cinema projector via the air supply path and the exhaust path formed in a state of being separated from the theater space, and hot air related to the exhaust of the digital projector is discharged. Therefore, it is possible to avoid the discharge of hot air or hot air related to cooling air and exhaust into the theater space. In addition, since the projector for digital cinema is installed in a sealed enclosure, noise such as the operating sound of the cooling mechanism emitted in the theater space can be reduced as much as possible. Therefore, a more comfortable theater space can be provided.

Also, when performing maintenance work, it is only necessary to lower the digital cinema projector using the lifting system, so there is no need to work at high places near the ceiling of the theater space, and the intended work is performed safely and reliably. be able to.
Furthermore, the exhaust duct constituted by the bellows can maintain the state where the exhaust duct is connected to the digital cinema projector, so even if the digital cinema projector is lowered, it can be used for digital cinema. Cooling air can be supplied to and exhausted from the projector, and the operation of the digital cinema projector can be checked after maintenance work without being housed in the housing.

  Furthermore, since the airtight cushioning member is elastically crushed by the housing main body and the lid body, an airtight structure (sealed structure) of the housing is formed, so that the lower surface of the housing can be opened and closed. Although it is configured, the operating sound, cooling air, or exhaust of the projector for digital cinema can be more reliably prevented from leaking into the theater space through the contact portion (small gap) between the lid and the housing body. Can do.

It is a figure which shows the outline of a structure in an example of the theater space using the projector apparatus for digital cinema movie theaters of this invention. It is a perspective view which shows the outline of a structure in an example of the projector apparatus for digital cinema cinemas of this invention. FIG. 3 is a partial cross-sectional view of the projector device shown in FIG. 2 as viewed from the left side direction, with the digital cinema projector lowered. It is a figure which shows roughly the structure of the projector for digital cinemas in the projector apparatus shown in FIG. It is a figure for demonstrating the raising / lowering operation | movement of the projector for digital cinemas in the projector apparatus shown in FIG. (A) is the fragmentary sectional view seen from the front direction which shows the state in which the projector for digital cinema was accommodated in the housing. (B) is the fragmentary sectional view seen from the front direction which shows the state where the projector for digital cinema was lowered | hung from the housing. It is a figure for demonstrating operation | movement of the air cylinder in the projector apparatus shown in FIG. (A) is a fragmentary sectional view which shows schematically the state in which an air cylinder exists in a non-operating state. (B) is a partial sectional view schematically showing a state in which the air cylinder is in an operating state. It is a figure which shows schematically a part of structure in the other example of the projector apparatus for digital cinema cinemas of this invention. (A) is a diagram showing a state in which the position of the lid body is regulated with respect to the housing body during the raising and lowering operation of the projector for digital cinema, as viewed from the front of the digital projector, and (b) is a diagram of the projector for digital cinema. The figure seen from the left side surface direction, (c) is a plan view seen from above showing the positional relationship between the guide rod and the guide roller. It is a figure which shows the outline of a structure in an example of the conventional theater space.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a diagram showing an outline of a configuration in an example of a theater space using a projector device for a digital cinema movie theater of the present invention.
A projector device (hereinafter also simply referred to as “projector device”) 10 for a digital cinema movie theater according to the present invention is a housing in which a projector for digital cinema (hereinafter also referred to as “digital projector”) 11 forms a sealed space. It is configured to be installed inside the body 20. In the theater space Sr, for example, the outer surface of the upper wall of the housing 20 is fixed to the ceiling surface C behind the spectator seat with respect to the screen S and installed in a separate room from the theater space Sr. It is used by being connected to a player (not shown) that transmits an image signal + audio signal by an appropriate signal cable (for example, a LAN cable). In addition, the projector apparatus 10 may be fixed and installed in a state where a part of the housing 20 is embedded in the ceiling.

FIG. 2 is a perspective view showing a schematic configuration of an example of a projector apparatus for a digital cinema movie theater according to the present invention. FIG. 3 is a partial cross-sectional view of the projector apparatus shown in FIG. 2 as seen from the left side direction, with the digital cinema projector lowered. In FIG. 2, in order to make it easy to see the constituent members provided inside the housing 20, for convenience, the housing body 21 is shown in a transparent state, and the housing body 21 itself is shown by a two-dot chain line.
The projector device 10 includes a housing 20 whose bottom surface is configured to be openable and closable. The housing 20 has an upper opening 28 that opens upward in a substantially central portion of the upper wall, and a box-shaped housing main body 21 that has a lower opening 23 that opens downward in the central portion of the bottom wall 22. The lid body (cover plate) 30 opens and closes the lower opening 23 of the housing body 21.

For example, the case body 21 is filled with, for example, glass wool (sound insulating material or sound absorbing material) in a space (hollow part) between two plate-like gypsum boards arranged to face each other at a constant interval. A wall is formed by the sound insulation panel.
A projection opening 26 is formed in the front wall of the housing body 21. The projection opening 26 is airtightly closed by, for example, a glass plate-like window member 27, whereby the projection window 25 is formed. Is formed.

  The lower opening 23 of the housing main body 21 is configured by a through hole having a rectangular opening shape, and a lid body receiving portion to which the lid body 30 is received and attached to the lower surface side opening edge of the through hole. A mounting portion 24 is formed. The lid body receiving / mounting portion 24 is formed by a recess having a quadrangular frustum-shaped space portion and a quadrangular columnar space portion continuous therewith.

The lid body 30 has a flat plate shape as a whole that fits the lid body receiving / mounting portion 24 in the housing body 21, and an outer peripheral edge portion on the upper surface is formed in a tapered shape.
The lid body 30 is constituted by a sound insulation panel in which, for example, rock wool (sound insulation material or sound absorption material) is filled in a space (hollow part) between two steel plates arranged to face each other with a certain interval therebetween. ing.

In the above, it is preferable that the sound insulation panel constituting the housing body 21 and the lid body 30 is configured such that the sound absorbing material is provided on the outer surface exposed to the theater space Sr. Since the housing main body 21 and the lid body 30 are covered with the sound absorbing material, even when the sound waves in the field reach the housing 20, they can be absorbed to suppress the echo, and unpleasant resonance in the theater space Sr can be suppressed. Occurrence can be prevented.
Furthermore, it is preferable that the sound absorbing material on the outer surface exposed to the theater space Sr is covered with the same interior cloth as the wall and ceiling surface C of the theater space Sr. Thus, by covering with the same cloth as the theater space Sr, it is possible to obtain an aesthetic appearance with a sense of unity with the theater space Sr.
Here, the thickness of the wall in the housing main body 21 is, for example, 200 to 250 mm including the layer of the sound absorbing material on the outer surface, and the thickness of the lid 30 in the housing main body 21 is the sound absorbing material on the outer surface. For example, the thickness is 70 to 100 mm.

A rectangular frame-like airtight cushioning member 35 extends over the entire circumference in the circumferential direction of the lid 30 on the outer peripheral edge portion on the upper surface of the lid 30, specifically, on the flat surface portion on the inner side of the tapered surface. It is arranged. The airtight buffer member 35 is elastically crushed by the flat surface of the lid body receiving / mounting portion 24 and the upper surface of the lid body 30 in the housing body 21, thereby forming an airtight structure of the housing 20.
The airtight buffer member 35 is made of an elastic body having sound insulation or sound absorption. A preferable elastic material is a rubber material. Specifically, sponge rubber such as chloroprene sponge, silicone sponge, fluorine rubber sponge, urethane sponge, PVC sponge, or chloroprene rubber, silicone rubber, ethylene / propylene / Solid rubber such as diene rubber (EPDM) can be used.
As described above, the contact surface between the lid body receiving / mounting portion 24 and the lid body 30 in the housing body 21 is not a mere flat surface but a so-called curved plane, so that high sound insulation can be obtained. it can.

  On the upper surface of the lid 30, a gantry 40 that supports the digital projector 11 is fixed via an air cylinder 45. The gantry 40 in this example includes a frame-like gantry frame 41 having a planar rectangular shape, and each of the pair of frame portions 42, 42 extending in the front-rear direction of the gantry frame 41 includes a plurality of frame portions 42, for example, It is supported from below by three (6 in total) air cylinders 45. The air cylinder 45 is in a posture in which the piston rod 46 slides up and down with respect to the cylindrical cylinder tube 47 at positions spaced apart from each other at equal intervals in the front-rear direction. The lower end of the piston rod 46 is fixed to the upper surface of the lid 30 by a fixing bracket 36 (see FIG. 6).

  The digital projector 11 is supported on the gantry 40 so as to be displaceable (position adjustment is possible), and is fixed by, for example, a belt-like fixing member 43. Here, the digital projector 11 is installed at a position separated by, for example, 300 mm or more from each wall surface of the housing 20, whereby a cooling airflow passage is formed around the digital projector 11. With such a configuration, an excessive temperature rise of the digital projector 11 can be reliably prevented, and the digital projector 11 can be operated normally.

  As shown in FIG. 4, the digital projector 11 includes, for example, a light source device 15 including a xenon discharge lamp, a so-called video engine 16, a power supply device 17, and a cooling mechanism in an outer casing. Reference numeral 12 denotes a projection lens. The video engine includes, for example, a color filter, an image element, and an appropriate optical lens. The cooling mechanism cools the xenon discharge lamp and other components by cooling air (indicated by white arrows in FIG. 4), and includes a supply fan 18a for cooling the lamp and other components. An air supply fan 18b for cooling and an exhaust fan 19 are provided. In FIG. 4, reference numeral 13 denotes a cooling wind introduction opening made up of openings (for example, slits) formed on the back surface and both side surfaces of the outer casing of the digital projector 11. Reference numeral 14 denotes an exhaust opening formed on the upper surface of the outer casing of the digital projector 11.

A specific configuration example of the xenon discharge lamp will be described. For example, the rated power consumption is 2 to 6 kW, the sealed pressure of xenon gas (normal temperature conversion) is 1 MPa or more (for example, 1 to 2 MPa), and the tube wall load is 30 W / It is cm ² or more (for example, 30 to 40 W / cm ² ).

  In the projector device 10 described above, the digital projector 11 can be lowered from the inside of the housing body 21 by an elevating system that is provided inside the housing 20 and supports the digital projector 11 so that it can be raised and lowered. (The hatched arrows in FIGS. 1 and 2 indicate the up-and-down direction of the digital projector 11). Examples of the lifting system include a system in which the digital projector 11 is suspended by a conventional pantograph type lifting system, and a system in which the digital projector 11 is suspended by a wire as will be described in detail below.

The elevating system 50 in this example is configured by a hoisting device, and is a substantially upper surface of the digital projector 11 provided in the hanging tool 51 provided at the four corner positions on the upper surface of the gantry frame 41 and the fixing member 43. The digital projector 11 is suspended and supported by a plurality of (in this example, five) wires 55 each having one end fixed to each of the hanging tools 51 positioned at the center. The hanging tool 51 is, for example, a screw-in type, and is configured such that the length of the wire 55 can be adjusted so as to be lifted and lowered in a state where the lid body 30 is maintained in a horizontal posture.
Each wire 55 is stretched by a plurality of guide sheaves (groove wheels) 54, and the other end is fixed to a common wire drum 52. The wire drum 52 is disposed in a posture in which the rotation shaft extends in the horizontal direction, and is driven to rotate by a winding motor 53. Since the wire drum 52 and the winding motor 53 are common to the wires 55, the digital projector 11 can be reliably maintained in an appropriate posture (horizontal) when the digital projector 11 is moved up and down.

Thus, in the projector device 10 described above, one end of the exhaust duct 70 extending in the vertical direction is connected to the exhaust opening 14 formed on the upper surface of the outer casing of the digital projector 11, and is shown in FIG. As described above, the other end of the exhaust duct 70 is led out of the housing 20 through the upper opening 28 formed in the upper wall of the housing body 21 and disposed on the ceiling. It is connected to the. As a result, the exhaust passage Ep extending outside the apparatus is formed in a state of being isolated from the theater section Sr, and is shown by hot air or hot air related to the exhaust of the digital projector 11 (in FIG. 1, it is indicated by a solid arrow). ) Is discharged outside the apparatus through the exhaust duct 70.
And the opening which connects the inside of the housing body 21 and the space behind the ceiling is provided in the upper wall and the ceiling surface of the housing body 21, and the cooling air supply port 29 is formed. An air supply path Sp connected to the cooling air supply fan 75 and extending to the outside of the apparatus is formed in a state of being isolated from the theater space Sr. That is, with reference to FIG. 5A, the cooling air (shown by white arrows in FIG. 5A) from the cooling air supply fan 75 disposed on the back of the ceiling is the casing. A cooling air supply port 29 formed in the upper wall of the main body 21 is supplied to the inside of the housing 20 and circulates through a cooling air flow passage F (inside the housing 20) formed around the digital projector 11. . Thereafter, the air is introduced from the cooling air introduction openings 13 formed on the back surface and both side surfaces of the outer wall of the digital projector 11 by the air supply fans 18a and 18b provided in the digital projector 11 in FIG. The lamp and other components are cooled.

The cooling air supply fan 75 and the exhaust fan 71 disposed on the back of the ceiling have a function of supplying cooling air and a function of discharging hot air related to exhaust at a flow rate of, for example, 18 m ³ / min or more. .
The exhaust duct 70 is formed of, for example, a bellows that can be expanded and contracted in the up-and-down direction of the digital projector 11, and is expanded and contracted as the digital projector 11 moves up and down.

Hereinafter, the raising / lowering operation | movement of the digital projector 11 in said projector apparatus 10 is demonstrated.
In this projector device 10, as shown in FIG. 5A, the digital projector 11 is usually housed inside the housing 20 and isolated from the theater space Sr. In, the discharge lamp and other components are cooled by cooling air. Thus, when performing maintenance work such as lamp replacement, the digital projector 11 is lowered from the inside of the housing 20 by the lifting system 50 as shown in FIG. That is, when the winding motor 53 is driven in reverse, for example, the wire drum 52 is rotated, the wires 55 are fed out with the same feeding amount, and the exhaust duct 70 is extended so that the lid 30 becomes horizontal. In the maintained state, the digital projector 11 is lowered to a predetermined position (for example, a position about 80 cm from the floor surface) with respect to the floor surface. Here, the feeding speed of the wire 55 can be set as appropriate within a range of, for example, 7 m / min or less, and may be constant or changed. For example, when the digital projector 11 is lowered from the floor surface to a predetermined height, the operation of the take-up motor 53 is controlled so that the feed speed is lowered (eventually becomes 0 m / min) as it approaches the floor surface. can do.
As will be described later, the air cylinder 45 is in an operating state when compressed air is supplied in a state where the digital projector 11 is housed in the housing 20, but when the digital projector 11 is lowered, By stopping the supply of compressed air, the piston rod 46 is positioned at a position below the cylinder tube 47.

  On the other hand, when the digital projector 11 is accommodated in the housing body 21 after the maintenance work is completed, the wire drum 52 is rotated by, for example, normal winding driving of the winding motor 53, and the wires 55 are the same. The digital projector 11 is raised in a state in which the exhaust duct 70 is shortened and the posture in which the lid 30 is leveled is maintained while being wound up by the winding amount. Here, the winding speed of the wire 55 can be appropriately set within a range of, for example, 7 m / min or less, and may be constant or changed. For example, when the digital projector 11 is raised from the floor to a predetermined height, the winding motor 53 operates so that the winding speed is reduced (finally 0 m / min) as it approaches the housing body 21. Can also be controlled.

  Then, each wire 55 is wound up by a predetermined winding amount, and the lid 30 is brought into contact with the lid body receiving / mounting portion 24 in the housing body 21 via the airtight buffer member 35 so that the lower opening of the housing body 21 is opened. When the portion 23 is closed by the lid body 30 (FIG. 6A), the drive of the winding motor 53 is stopped. At this time, vibration when the lid 30 is housed in the receiving mounting portion 24 of the housing body 21 is reduced by the airtight buffer member 35. The drive control of the winding motor 53 can be performed by, for example, an overwinding prevention means (not shown) such as a limit switch or a sensor.

  In this state, by supplying compressed air (indicated by solid arrows in FIG. 6B) to each air cylinder 45, the piston rod 46 is moved to the cylinder as shown in FIG. 6B. The piston 47 is operated upward with respect to the tube 47 (in FIG. 6B, the moving direction of the piston rod 46 is indicated by a hatched arrow for convenience), and the airtight buffer member 35 is elastically crushed. The lid 30 is pulled upward (in FIG. 6B, the moving direction of the lid 30 is indicated by a white arrow). The inside of the housing 20 is held in an airtightly sealed space, and the projection lens 12 of the digital projector 11 is placed at an appropriate position with respect to the projection window 25 of the housing 20. See Figure 1).

Thus, according to the projector device 10 having the above configuration, basically, all the components such as the digital projector 11 and the lifting system 50 are accommodated in the housing 20, so that the beauty of the theater space Sr can be improved. It can be installed in the theater space Sr without any damage, and the theater space Sr can be used effectively.
Moreover, an air supply path Sp extending outside the apparatus through a cooling air supply port 29 formed so that the housing main body 21 and the back of the ceiling communicate with each other, and an exhaust duct 70 pass through the upper opening 28 of the housing main body 21. Since the exhaust passage Ep formed by being led out to the outside of the apparatus is isolated from the theater space Sr, the cooling air supplied to the projector device 10 and the hot air or hot air related to the exhaust (for example, 40 to 50 ° C.) can be avoided from being discharged into the theater space Sr. In addition, since the wall and the lid 30 in the casing main body 21 constituting the casing 20 are formed by a sound insulating panel and the casing 20 itself is configured to have high sound insulating properties and sound absorbing properties, a cooling mechanism (lamp) for the digital projector 11 is provided. Noises such as operation sounds of the cooling air supply fan 18a, the cooling air supply fan 18b of the other components, and the exhaust fan 19) are shielded by a sound insulation panel constituting the wall of the housing 20. Can absorb sound. Therefore, the noise emitted from the projector device 10 into the theater space Sr can be reduced as much as possible.
As described above, according to the projector device 10 having the above-described configuration, it is possible to solve the problems relating to the exhaust and noise from the digital projector 11 and to provide a more comfortable theater space Sr.

  Further, according to the projector device 10 having the above configuration, the following effects can be further obtained.

(1) When performing the maintenance work, it is only necessary to lower the digital projector 11 by the lifting system 50 using the wire 55, so that it is not necessary to work at a high place near the ceiling of the theater space Sr, and it is safe and reliable. Work can be done. Moreover, since the digital projector 11 is suspended and supported by the wire 55, the operator can access from the entire circumference of the digital projector 11, so that maintenance work can be easily and reliably performed. High workability can be obtained.
Furthermore, since the exhaust duct 70 configured by the bellows can maintain the state where the exhaust duct 70 is connected to the digital projector 11, the digital projector 11 can be operated even when the digital projector 11 is lowered. The cooling air can be supplied and exhausted, and the operation of the digital projector 11 after the maintenance work can be confirmed without being housed in the housing 20.

(2) By the operation of the air cylinder 45, the state in which the lid 30 is pressed against the housing main body 21 via the airtight buffer member 35 is maintained and the airtight structure of the housing 20 is formed. Has higher sound insulation and sound absorption. Therefore, for example, due to the influence of the weight of the digital projector 11 and the like, the airtightness of the housing 20 does not decrease, and for example, the operation sound of the cooling mechanism emitted from the digital projector 11 is reliably prevented from leaking into the theater space Sr. be able to.
In addition, since the vertical position of the digital projector 11 in the housing 20 can be finely adjusted by operating the air cylinder 45, the digital projector can be adjusted by moving the digital projector 11 up or down or by its own weight. Thus, it is possible to avoid the displacement of the position of the eleven projection lenses 12 with respect to the position of the projection window 25 in the housing 20, and the work such as readjustment of the optical system becomes unnecessary.

As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment, A various change can be added.
For example, the projector device of the present invention can be configured to include a position restricting means for restricting the position or posture of the digital projector 11 relative to the housing body 21 when the digital projector 11 moves up and down.

In this example, as shown in FIG. 7, there is provided a position restricting means constituted by a guide rod 61 provided in the frame 41 and extending in the vertical direction, and a pair of guide rollers 62 for guiding the guide rod 61. It is configured.
The guide rod 61 is formed in a pointed shape (conical shape) having a smaller diameter as the upper end portion is directed upward. For example, the guide rod 61 is provided at two diagonal positions on the upper surface of the gantry frame 41. The pair of guide rollers 62 are provided to be fixed to the casing main body 21 in such a manner that the rotation shaft extends in the horizontal direction at a position sandwiching a cylindrical guide rod moving path extending in the vertical direction. Each guide roller 62 has a guide groove 64 formed on the circumferential surface of the roller base 63, and a rod guide space R is formed by the guide grooves 64 of the pair of guide rollers 62. The rod guide space R is positioned in a state where the rotation axes of the guide rollers 62 are displaced in the vertical direction so that the rod guide space R has a shape that matches the outer contour shape of the guide rod 61 in plan view.

  According to such a configuration, when the digital projector 11 moves up and down, each guide rod 61 is inserted into the rod guide space R formed by the corresponding pair of guide rollers 62 so that the guide rod 61 is guided. Guided by rollers 62. Thereby, the position or attitude of the digital projector 11 with respect to the housing body 21 is regulated. Therefore, even if a slight shaking is applied during the lifting / lowering operation of the digital projector 11, the wire 55 is not bent and the horizontality of the lid 30 is not significantly disturbed, and the lifting / lowering operation of the digital projector 11 can be performed safely and reliably. Can be done.

  The position restricting means is not limited to the one using the guide rod and the guide roller as long as it can restrict the position of the lid relative to the casing during the raising / lowering operation of the digital projector.

Moreover, in this invention, if the lower surface is comprised so that opening and closing is possible, it will not be limited to the thing of the structure which opens and closes the opening part of a housing main body with a cover body.
Furthermore, the number of wires for hanging and supporting the digital projector, the fixed positions of the wires, the number of air cylinders, and other specific configurations can be changed as appropriate.
Furthermore, the two airtight cushioning members may be arranged on the surface of the lid so as to extend in parallel with each other at a predetermined interval to form a double seal structure. Moreover, the airtight buffer member may be configured to be provided in the housing body.

10 Projector Device 11 Digital Cinema Projector (Digital Projector)
DESCRIPTION OF SYMBOLS 12 Projection lens 13 Cooling wind introduction opening 14 Exhaust opening 15 Light source device 16 Video engine 17 Power supply device 18a Supply fan for lamp cooling 18b Supply fan 19 Exhaust fan 20 Case 21 Case body 22 Bottom wall 23 Lower opening 24 Lid receiving attachment 25 Projection window 26 Projection opening 27 Window member 28 Upper opening 29 Cooling air supply port 30 Lid 35 Airtight buffer member 36 Fixing bracket 40 Mounting frame 41 Mounting frame 42 Frame part 43 Fixing member 45 Air cylinder 46 Piston rod 47 Cylinder tube 50 Lifting system 51 Lifting tool 52 Wire drum 53 Winding motor 54 Guide sheave (groove wheel)
55 Wire 61 Guide rod 62 Pair of guide rollers 63 Roller base 64 Guide groove R Rod guide space 70 Exhaust duct 71 Exhaust fan 75 Cooling air supply fan Ep Exhaust path Sp Supply path F Cooling airflow path 80 Projector Pr Projector Room Sr Theater Space S Screen C Ceiling

Claims (1)

For digital cinema equipped with a housing that forms a sealed space inside, with an upper wall fixed to the ceiling of the theater space, and a cooling mechanism that is installed inside the housing and consists of a fan in the outer casing With a projector,
The digital cinema projector has a cooling air introduction opening and an exhaust opening for cooling air related to the cooling mechanism formed on an outer casing thereof.
A cooling air supply path and an exhaust path for cooling the digital cinema projector are formed so as to extend to the outside of the apparatus through the upper wall of the housing in a state of being isolated from the theater space,
Inside the housing, a cooling air flow passage is formed through which cooling air for cooling the digital cinema projector is circulated ,
An exhaust opening of the digital cinema projector is connected to the exhaust path via an exhaust duct and an exhaust fan is provided in the exhaust path.
A cooling air supply fan is provided in the air supply passage so as to supply air to the digital cinema projector through the cooling air flow passage and the cooling air introduction opening.
The projector device for a digital cinema movie theater, wherein the exhaust fan and the cooling air supply fan are arranged behind the ceiling of the theater space .

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