JPS6212604Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lamp device for a discharge lamp, particularly equipped with a light-shielding shutter, for mounting and lighting a discharge lamp.

Discharge lamps are generally used for a variety of purposes due to their large light output, but discharge lamps such as mercury lamps do not reach a fully lit state until a certain period of time has passed after they start lighting. . However, depending on the manner in which the discharge lamp is used, it is often the case that a fully lit state must be obtained immediately after a relatively short pause time.

For example, in discharge lamps such as mercury lamps used for drying printing ink, when the printing process is interrupted due to replenishment of printing paper or trouble with the transportation of printing paper, the discharge lamp does not need to be fully lit. However, full illumination must be obtained as soon as the printing process is restarted. A similar requirement exists when using a discharge lamp to cure ultraviolet-curable paint.

In this way, when light projection by the discharge lamp in a fully lit state is to be resumed after a relatively short downtime has elapsed, a light-blocking shutter is provided in the discharge lamp fixture so as to be able to be opened and closed freely, and the shutter is closed during the downtime while the discharge lamp is kept in a standby lighting state, i.e., capable of immediately transitioning to a fully lit state, and maintaining the lamp in a lighting state with low power consumption.

Therefore, in a discharge lamp lamp device equipped with such a shutter, it is necessary to cool the shutter in the closed state so that the shutter does not become overheated due to the heat from the discharge lamp. It is. On the other hand, it is also desirable that the installed discharge lamp be appropriately cooled when it is fully lit and when it is on standby.

Conventionally, various cooling means have been proposed and used in lamp equipment for discharge lamps, but none of them cools the shutter and discharge lamp appropriately and efficiently, making them uneconomical. There is a drawback.

The present invention is based on the above-mentioned circumstances, and an object of the present invention is to provide a lamp device for a discharge lamp that can appropriately and efficiently cool the shutter and the discharge lamp, no matter what state the shutter is in. do.

An embodiment of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIGS. 1 to 4, partition walls 3A and 3B are provided at both ends of the elongated outer casing 1 constituting the lamp, respectively, to separate end chambers 2A and 2B. A space near one side of the central space 4 of 3B is used as a space for mounting a discharge lamp, and a reflecting mirror 5 is provided behind it, and a rod-shaped discharge lamp 6 is mounted at both ends of the supporting member so as to be positioned in front of the reflecting mirror 5. Supported by 7A, 7B, end front plate 8A,
8B (omitted in Figures 1 and 3), the discharge lamp 6
are fixed to the outer casing 1 or the partition walls 3A, 3B so as to cover the front surfaces of the front end spaces 10A, 10B where the seal portions 9A, 9B are located. As shown in FIG. 5, the reflecting mirror 5 has an air exhaust slit 11 formed in its center, and the air inlet 13 of the uniform air exhaust device 12 disposed behind the reflecting mirror 5 is inserted into the air exhaust slit 11.
Connect to.

A cooling air inlet 14 is provided in the outer end wall of the outer casing 1 related to one end chamber 2A separated by the partition wall 3A.
is connected to a cooling air supply mechanism (not shown), and is fixed with a cooling air direction regulating plate 15 that directs the direction of the introduced cooling air to the rear of the discharge lamp 6. A through hole 16 is formed at the rear end of the partition wall 3A related to the end chamber 2A to communicate with a rear space 17 along the outer periphery of the exhaust fan 12.

On the other hand, along the front surface of the outer case 1, the reflective mirror 5
It is movable between a light shielding position where the end front plates 8A and 8B cover the light projection port, and an open position where the light projection port is opened near the other side of the outer casing 1 as shown in FIG. For example, a light shielding shutter 21 is provided by guide rail portions 20A and 20B formed on the partition walls 3A and 3B, and is connected to a suitable shutter drive mechanism. As shown in FIG. 6, this shutter 21 has a hollow plate shape and has a cooling air inlet 22 communicating with the internal space on the end surface extending in the moving direction X that projects into the one end chamber 2A. , an air outlet 23 consisting of a through hole is provided on the outer surface of the other end. This shutter 21 is provided with a cooling air guide plate 24 extending rearward from the inner surface of one end with substantially the same width so that its tip edge 25 is located within the cooling air path defined by the cooling air direction regulating plate 15. . 26, 26 are this cooling air guide plate 24
It is a side plate that stands up on both side edges of. A closing plate 27 extending along the moving direction X of the shutter 21 is fixed to, for example, the outer casing 1 so as to close the cooling air inlet 22 of the shutter 21 in the open position. Reference numeral 28 denotes a slit formed at the proximal edge of the side plates 26, 26. This slit 28 prevents the side plates 26, 26 from colliding with the closing plate 27, so that the closing plate 27 is placed on one end surface of the shutter 21. It is permitted to enter the position. In the illustrated example, the shutter drive mechanism includes a rotary solenoid 30 disposed in the end chamber 2B and a cooperating rotary solenoid (not shown) disposed in one end chamber 2A. It is made up of. 31 is the exhaust fan 12
It is a wind outlet.

Since the lamp device for a discharge lamp of the present invention has the above-mentioned configuration, the first shutter 21 is in the open position.
In the state shown in FIG. 2 and FIG. 2, the cooling air that enters one end chamber 2A from the cooling air inlet 14 is directed rearward by the cooling air direction regulating plate 15, as shown by the arrow in FIG. The through hole 1 of the partition wall 3A becomes
6 from the rear space 17 to the front end space 10
A, 10B, and at this time both end seal portions 9A, 9B of the discharge lamp 6 are cooled. The cooling air then flows along the sealed tube of the discharge lamp 6 to cool it, and after cooling the reflector 5, it passes through the exhaust slit 11 of the reflector 5.
The air is discharged from the air outlet 31 of the air exhaust device 12 to the rear of the device.

In this state where the shutter 21 is in the open position, since the cooling air inlet 22 of the shutter 21 is blocked by the closing plate 27, substantially all of the cooling air flows through the through hole 16 as described above.
Due to this wind, both end seal portions 9A and 9 of the discharge lamp 6 are
In addition to being sufficiently cooled, the discharge lamp 6 and the reflecting mirror 5, which are in a fully lit state and require large cooling, can be sufficiently cooled by the action of the exhaust fan 12.

When the shutter 21 is moved along the moving direction 22
As a result, as shown by the arrow, a portion of the air from the cooling air inlet 14 reaches the cooling air guide plate 2.
4, the air flows into the shutter 21 through the cooling air inlet 22, sufficiently cools it, and is then discharged through the air outlet 23 of the shutter 21.

Even in this state, the cooling air guide plate 2
4 does not completely block the air path leading to the through hole 16, a portion of the cooling air flows through the same route as when the shutter 21 is in the open state, so a standby lighting state can be achieved with relatively little cooling. It is possible to appropriately cool the discharge lamp 6 and the reflecting mirror 5 located in the area.

Although one embodiment of the present invention has been described above, in the present invention, the seal portions 9A and 9B of the discharge lamp 6 are
On the upstream side of the cooling air, the seal portion 9A,
For example, a cylindrical air guide member 32 extending toward 9B
It is preferable to provide A and 32B. According to such a configuration, the direction of a part of the cooling air can be regulated and directed to the seal parts 9A, 9B, and the seal parts 9A, 9B can be reliably cooled, and the discharge lamp due to overheating can be reliably cooled. 6 can be prevented from shortening its life.

As described above, the present invention provides a lamp device for a discharge lamp that can appropriately and efficiently cool a shutter and a discharge lamp when the shutter is in either an open state or a light-blocking state. I can do it.

[Brief explanation of the drawing]

Figures 1 and 2 are an explanatory cross-sectional plan view and an explanatory longitudinal front view of the lamp device for a discharge lamp of the present invention in a state where the shutter is in the open position, respectively, and Figures 3 and 4 are respectively views of the discharge lamp of the present invention. An explanatory cross-sectional plan view and an explanatory longitudinal cross-sectional front view with the shutter of the lamp device in the light-shielding position, Figure 5 is an explanatory diagram of the configuration of the reflector, discharge lamp, exhaust fan, and shutter, and Figure 6 is the book. FIG. 2 is a perspective view of a shutter having a cooling air guide plate used in the invention. 1... Outer box, 2A, 2B... End chamber, 3A, 3
B... Bulkhead, 4... Central space, 5... Reflector, 6
...Discharge lamp, 8A, 8B... End front plate, 10
A, 10B... Front end space, 12... Uniform air exhaust fan, 13... Air inlet, 14... Cooling air introduction port, 15... Cooling air direction regulating plate, 16... Through hole, 21... Light shielding shutter, 22... Cooling air inlet, 24... Cooling air guide plate, 25... Tip edge, 26... Side plate, 27... Closure plate, 30... Rotary solenoid, 32A, 32B... ...Air guide member.

Claims (1)

[Scope of utility model registration request] An outer casing constituting a lamp in which a discharge lamp is attached; a cooling air path formed in the outer casing for introducing cooling air into a space where the discharge lamp is located; a light shielding position for blocking a light projection opening of the lamp; A hollow plate-shaped shutter having a cooling air inlet and an air outlet communicating with the inner space, which is provided to move between open positions for opening a light projection aperture, and when the shutter is in its light blocking position, the cooling air is a cooling air guide plate, a portion of which is located within the cooling air passage, and which branches the cooling air passage and guides a portion of the cooling air supplied to the cooling air passage to the cooling air inlet of the shutter; and the shutter is opened. when in position, the outer casing has an end chamber, the cooling air passage passes through this end chamber, and the cooling air guide plate passes through this end chamber. A lamp device for a discharge lamp, characterized in that the lamp device is fixed to the shutter so as to be located at the shutter.