JPH0749658A - Large-sized display device - Google Patents

Abstract

PURPOSE:To provide the large-sized display device with which safe operations, such as inspection and maintenance, are assured and a cost reduction is attained. CONSTITUTION:This display device includes a working plate 14A disposed in the lower part of a display panel 6 and a working plate 21A disposed on the rear surface of this display panel 6. This working plate 14A is capable of having a hanging position in the closed position of a front door 5 and having a horizontal position and functioning as a working table 14 by overhanging forward in the open position of the front door 5. The working plate 21A is mounted with at least a part 13a of electrical articles on its rear surface and is capable of having an upright position where its rear surface and the electrical articles face the rear surface side and a horizontal position where the front surface is exposed horizontally and functions as a working table.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-sized display device, and more particularly to a display panel having a large number of light-emitting elements mounted thereon, and a front door and a rear door which can be opened and closed on the front side and the back side, respectively. The present invention relates to a large-sized display device having a display panel and a housing that houses various electric components.

[0002]

2. Description of the Related Art A display device incorporating, for example, an LED (light emitting diode) module as a light emitting element is used for displaying passenger information such as transportation means, various services, and information. 5 and 6 show a conventional large-sized display device of this type.

In the large display device 10 shown, LE
The flat washer 25, the spring washer 26, and the display panel 6 are attached to the mounting feet 7, which are provided at four corners of the D module 3 one by one.
The LED module 3 is attached to the display panel 6 by screwing the setscrew 8 through the attachment hole. A large flat screen is constructed by arranging a large number of LED modules 3 in a grid pattern. A single-sided front door 5 having a transparent plastic plate 4 on the front surface of the LED module 3
Is provided. On the rear surface of the large-sized display device 10, a double door type rear door 12 is arranged. The housing is configured to include a single-opening front door 5 and a double-door double door 12. In the large-sized display device 10, electric appliances 13 to 13 a for supplying driving power to the LED module 3 or controlling the driving power are housed. The electric equipment 13 is mounted on the equipment base 11 which is arranged in a plane, and the electric equipment 13a is installed in the equipment base 11 which is arranged vertically.
It is attached to a. A ventilation fan 22 is also provided in the large-sized display device 10 for radiating heat from the inside of the housing. The ventilation fan 22 is attached to the attachment plate 23. By driving the ventilation fan 22, heat is radiated to the outside of the housing through a ventilation hole 24 formed in the upper surface of the housing.

For maintenance and inspection work of the LED module 3, a single-opening type front door 5 and a double door type rear door 1
2 is rotated 90 degrees to the open position indicated by the chain line to open the front surface and the back surface of the large-sized display device 10, and then the display panel 6 for the LED module at a relatively low position is displayed as shown in FIG. Loosen the set screw 8 from the rear side of the
Remove the ED module 3 to the front and perform maintenance and inspection work. For the LED module located at a relatively high place, a pair of stepladders 9 (only one of the front side is shown in the figure) is set up in front of the large-sized display device 10, and the work plate 1 is laid over it to work Ride on board 1 and perform required maintenance and inspection work.

For maintenance and inspection of the electric appliances 13 and 13a, after opening the double-door double-door 12, the set screws (not shown) are loosened and removed. As in the case of the LED module 3, the electric appliance 13a located at a high place prepares the worktable 2 for maintenance and inspection work.

As described above, the maintenance / inspection work of the large-sized display device 10 is performed by opening the single-opening front door 5 or the double-door double-door 12 and then opening the stepladder 9, the work board 1, or the assembly-type work outside the large display device. This is done by installing the table 2.

[0007]

To maintain the large display device 10, it is necessary to prepare a stepladder 9, a work plate 1 and an assembling worktable 2 at least before and after the large display device 10 in order to prepare them. Costly and time consuming. Further, when working from the back of the large-sized display device 10, the electric appliances 13 and 13a installed inside interfere with the work of attaching and detaching the setscrew 8 of the LED module 3, and inevitably have an unstable work posture. In particular, safety measures for working in high places are an important issue.

Therefore, it is an object of the present invention to provide a large-sized display device capable of ensuring a safe operation during inspection and maintenance and achieving cost reduction.

[0009]

In order to achieve the above object, a large-sized display device of the present invention comprises a display panel having a large number of light-emitting elements, a front door and a rear door which can be opened and closed on the front side and the back side, respectively. A housing having a display panel and various electric parts inside, and provided inside the housing at the bottom of the display panel.The front door is in the hanging position at the closed position, and the front door is at the front position in the open position. A first work plate that can be extended to take a horizontal position, and is provided on the back side of the display panel inside the housing, and at least a part of the electrical equipment is attached to the back surface. And an upright position facing the back side of the second work plate and a second work plate capable of taking a horizontal position where the surface is exposed horizontally.

[0010]

According to the above construction, the work plate partially serving as the electrical equipment mounting plate is always provided in the housing with almost no extra space. Therefore, the work plate, the stepladder, the assembly worktable, etc. There is no need to prepare it separately. Therefore, not only can cost reduction be achieved, but the operator can directly enter the housing and perform the work in a position close to the maintenance / inspection target, and in a comfortable posture. It is possible to secure safe work.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. In these figures, the same reference numerals as those used in FIGS. 5 to 7 indicate the same elements or devices.

According to the present invention, the first panel is formed on the lower portion of the display panel 6.
The built-in workbench 14 is provided, and the second built-in workbench 21 is provided on the back side of the display panel 6. The built-in workbench 14 essentially comprises a work plate 14A and is dedicated to the workbench. The working plate 14A is always used, that is, the large display device 1
When 0 is used, the hanging position is taken and the storage position is set along the front surface of the large-sized display device 10. At the time of maintenance / inspection work, as shown by the chain line, it is rotated 90 degrees to the front side and raised to the front. The work table 14 is made to function as the work table 14 by projecting to the horizontal position, and then raising the folding support legs 20 that are normally folded to the standing position. Using this work table 14, maintenance and inspection work from the front side of the LED module 3 can be easily performed. Second
The built-in workbench 21 is substantially composed of a work plate 21A, and is used when the LED module 3 is approached from the rear side of the housing for maintenance / inspection work. In this case, the electric appliance 13a, which is an obstacle, is attached to the back surface of the work plate 21A. The work plate 21A normally takes an upright position as in the case of FIG. 5, but during maintenance and inspection work, it can be tilted 90 degrees to the rear side to take a horizontal position shown by a chain line. At this horizontal position, the surface of the work plate 21A is exposed horizontally and can function as a work table. When the work plate 21A is in the horizontal position as described above, the electric appliance 13a is located on the back surface, that is, the lower surface of the work plate 21A, and does not interfere with the work.

The construction of the built-in worktables 14 and 21 will be further described with reference to FIGS. 2 and 3.

In the built-in workbench 14, as shown in FIGS. 2 and 3, workbench fixing bases 15a and 16a are attached to the left and right side walls of the large-sized display device 10, and the workbench fixing base 15a is attached to the workbench fixing base 15a. On the other hand, the work plate 14A is rotatably attached via the pins 17, respectively, and the work plate fixing base 18 is fitted into the hole portion of the work table fixing base 15a using the flat washer 25a, the spring washer 26a and the set screw 8b. The work plate fixing base 18 is fixed to the work table fixing base 15a with the set screw 8b to prevent the pin 17 from falling off.

When the work plate 14A is stored in the housing (always), the flat washer 25, the spring washer 26, and the manual screw 1 are used.
It is fixed to the workbench fixing base 16a by means of 9 to take the hanging position. At the time of maintenance and inspection work, after removing the hand screw 19, the work plate 14A is lifted 90 degrees to the front side to allow the work plate 14A to assume a horizontal position, and the foldable supporting legs 20 are raised to position the work plate 14A in the horizontal position. Fixed to. Work plate 14
Reinforcement stay 27 to securely fix A in the horizontal position
And the like can be provided as appropriate.

The built-in workbench 21 is also constructed on the basis of substantially the same principle as the built-in workbench 14. As can be seen from FIGS. 2 and 4, the built-in workbench 21 has workbench fixing bases 15b and 16b on the left and right side walls of the housing.
And the work plate 21A is rotatably attached to the workbench fixed base 15b through the pins 17, respectively. Further, the work plate fixing base 18 is fixed to the flat washer 25b,
The spring washer 26b and the set screw 8b are used to fit into the holes of the workbench fixing base 15b, and the work plate fixing base 18 is fixed to the workbench fixing base 15b by the set screw 8b.
To prevent the pin 17 from falling off.

Work board 21A at all times (non-inspection / non-maintenance)
Has an upright position, and a hand screw 19 is used to maintain the upright position. At this time, the electric appliance 13a attached to the back surface of the work plate 21A faces the back surface side of the large-sized display device 10. Manual screw 1 for maintenance and inspection work
9. Remove 9 and lower the work plate 14A to the front side 90 degrees to bring it to a horizontal position, and fix it to the workbench fixing base 16b with a flat washer 25, a spring washer 26 and a hand screw 19 to expose the surface horizontally. Can function as a workbench. At this time, the electrical equipment 13a is located on the lower surface of the work plate 21A and does not interfere with the work.

As described above, the work plates 14A,
The workbench 14 to 21 can be easily configured by storing 21A in the large-sized display device 10 and lifting or lowering them by 90 degrees during maintenance and inspection. Moreover, since the workbench 21 for the back surface work also serves as the electrical equipment mounting plate, the workbench can be configured in the large-sized display device 10 without occupying a special space,
There is a feature that the work can be performed closer to the target device of the maintenance / inspection work.

[0019]

As described above, according to the present invention, since the work table is formed by the work plate prepared inside the large-sized display device without preparing a special work table, it is necessary to carry out each maintenance / inspection work. Not only can work on the workbench be eliminated, but work closer to the work object can be performed, and safety work at the time of maintenance / inspection and cost reduction can be achieved well.

[Brief description of drawings]

FIG. 1 is a perspective view showing a maintenance / inspection work state of a large-sized display device according to the present invention.

FIG. 2 is a plan view showing the built-in workbench of FIG. 1 in a state at the time of maintenance / inspection.

FIG. 3 is an exploded perspective view showing details of a main part of FIG.

FIG. 4 is an exploded perspective view showing details of a main part of FIG.

FIG. 5 is a perspective view showing a conventional large-sized display device.

FIG. 6 is a side view showing a mounted state of the LED module in FIG.

FIG. 7 is a diagram for explaining an attachment / detachment work of the LED module in FIG.

[Explanation of symbols]

 3 LED module 4 Transparent plastic plate 5 Single-sided front door 6 Display panel 7 Mounting foot 8 Set screw 10 Large display device 11 Device base 12 Double-sided rear door 13 Electrical equipment 13a Electrical equipment 14 Built-in workbench 14A Working board 19 Hand screw 20 Folding type supporting foot 21 Built-in workbench 21A Work plate

Claims (3)

[Claims] 1. A housing having a display panel on which a large number of light emitting elements are mounted, a front door and a rear door which can be opened and closed respectively on a front side and a back side, and which houses the display panel and various electric parts therein. And a first operation which is provided in the lower part of the display panel inside the housing and can take a hanging position when the front door is closed and a horizontal position by projecting forward when the front door is open. A plate, provided on the back side of the display panel inside the housing, and at least a part of the electrical equipment is attached to the back side,
A large-sized display device having an upright position in which its back surface and electrical equipment are opposed to the back surface side of the housing, and a second work plate capable of assuming a horizontal position where the surface is exposed horizontally. 2. The large-sized display device according to claim 1, wherein the first work plate can be locked in a horizontal position by a foldable foot. 3. The large-sized display device according to claim 1, wherein the second work plate includes means for locking the second work plate in a horizontal position.