JP3490065B2 - Display unit maintenance tools - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a maintenance tool for replacing a display unit of a display device.

[0002]

2. Description of the Related Art A large-sized display device including a large number of display units is mounted on a wall surface of a building to display advertisements, news and the like.

A display device mounted on the wall surface of a building or installed outdoors has a waterproof structure that prevents rainwater and the like from entering the inside of the display device. Therefore, the mounting plate for mounting the display unit and the back surface of the display unit are in close contact with each other.

On the other hand, since it is necessary to supply a voltage for display to the display unit, it is necessary to provide a hole in the mounting plate for passing a wire connecting the power supply substrate provided inside the display device and the display unit. However, this hole cannot be enlarged to make it a waterproof structure.

As a result, the individual display units are inevitably attached from the front side of the display device.

[0006]

In a display device in which a large number of display units are arranged, the display unit may fail due to long-term use, and it is necessary to replace the failed display unit.

However, the display unit cannot be replaced from the inside of the display device because the hole of the mounting plate is made small in order to make the mounting portion of the display unit waterproof as described above. As a result, when replacing the display unit, it is necessary for an operator to ride on a crane-type workbench and perform maintenance work at a high place, which is not only dangerous but also time-consuming. There was a point.

An object of the present invention is to make it possible to easily replace the display unit.

[0009]

According to a first aspect of the present invention, there is provided a maintenance tool for a display unit, comprising: a connecting member connected to a rear surface side of the display unit; a wire connected to the connecting member; and a rod portion to which the wire is attached. And a reel for winding or unwinding the wire.

According to the present invention, when the display unit of the display device is replaced, for example, the connecting member of the maintenance tool is connected to the back surface of the display unit, the rod portion is inserted into the mounting hole of the display device, and the reel is loosened. Cable and pull out the faulty display unit to the ground. Then, connect the connecting member of the maintenance tool to the back surface of another display unit on the ground, rewind the reel and lift the display unit to the desired position of the display device, and then screw the display unit from the inside of the display device. It becomes possible to fix it.

Therefore, it is not necessary for an operator to replace the display unit from the outside of the display device at a high place, and the maintenance work can be safely performed. Also, since the work is simplified, the work time can be shortened. Since a space for exchanging components (such as a power supply board) other than the display unit is usually provided inside the display device, it is relatively easy to perform the exchanging work from the inside.

In the above invention, when the tip of the connecting member is curved and a roller is provided at the tip of the rod, and when the wire is rewound, the curved portion of the tip of the connecting member comes into contact with the roller so that the connecting member It may be rotated so that the orientation of the display unit is constant.

With this configuration, when the reel is rewound, the curved portion at the tip of the connecting member comes into contact with the roller at the tip of the rod portion, and the inclinations of the curved portion and the roller do not match. , The display unit rotates so that the two match, so that the display unit can always be oriented in a fixed direction. This can prevent the display unit from being turned upside down, so that the display unit can be fixed from the inside of the display device.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1A to 1C are external views of the display device 11, in which FIG. 1A is a front view and FIG.
Is a right side view, and FIG. 6 (C) is a top view. Also, FIG.
FIG. 4 is a front view of a mounting plate to which the display unit 12 is mounted.

The display device 11 is constructed by arranging a large number of display units 12 composed of a plurality of LED light emitting elements in a matrix. Since this display device 11 is installed outdoors, when the display unit 12 is attached to the mounting plate 21 (FIG. 2) of the display device 11, rainwater does not enter the inside of the display device 11 from between them. Has become. Specifically, the shape of the hole 22 of the mounting plate 21 is made small, and the mounting plate 21 and the back surface of the display unit 12 are in close contact with each other to form a rainproof structure that prevents intrusion of rainwater.

A connector mounted on the substrate is projected on the back side of the display unit 12, and the connector is inserted into the hole 22 of the mounting plate 21 and the connector has a power supply substrate provided inside the display device 11 and the like. Is connected to a cord, and a display control signal, a display voltage, etc. are supplied.

As shown in FIG. 1B, inside the display device 11, a maintenance area 13 is provided as a space in which a person can enter and replace the power supply board and the like. Next, FIG. 3 is a diagram showing the maintenance tool 31 and the display unit 12 according to the embodiment of the present invention.

The maintenance tool 31 includes a rod portion 32, a wire 33,
It comprises a reel 34 for winding or unwinding the wire 33, and a connecting member 35 for mounting the display unit 12. A notch portion 32a is provided at a predetermined position of the rod portion 32. This notch 32a is provided with the rod 32 when the display unit 12 is exchanged.
It is for determining the position of the rod portion 32 in the front-rear direction when it is inserted into 2.

As shown in FIG. 4, the connecting member 35 of the maintenance tool 31 has a connector 36 inserted into a connector 37 on the back side of the display unit 12, a spring 38 for fixing the connectors 37 and 36, and a tip. The pin 39 has a curved shape.

FIG. 5 is a view showing the shape of the pin 39,
5A is a front view, FIG. 5B is a top view, and FIG.
5C is a left side view, and FIG. 5D is a right side view thereof.
The portion on the right side of the pin 39 has a shape obtained by cutting a cylinder into halves as shown in FIGS.
Two holes 51 for fixing 6 are provided. A curved portion 39a is formed in the left side portion of the pin 39 from the central portion to the tip portion, and a hole 52 for connecting the wire 33 is provided at the tip thereof.

FIGS. 6A to 6C are views showing the shape of the roller 40 attached to the rod portion 32. Roller 40
Has a cylindrical shape, and the shaft 61 is fixed to the position eccentric from the center by caulking or the like. This shaft 61 is the rod 32
The roller 40 is rotatably attached to the tip of the rod portion 32 by being inserted into the hole at the tip of the. The rotation center of the roller 40 is eccentric because the outer dimension of the tip of the rod portion 32 including the required diameter of the roller 40 is limited by the diameter of the hole 22 of the mounting plate 21. is there. In the embodiment, the rotation center of the roller 40 is located at an eccentric position so that the radius from the rotation center of the roller 40 is reduced and the outer dimension of the rod portion 32 including the radius of the roller 40 is reduced. .

By making the pin 39 and the roller 40 have the above-described shapes, when the display unit 12 is attached to the connection member 35 and the wire 33 is wound, the curved portion 39a of the pin 39 of the connection member 35 is changed to the roller 40. Contact with. At this time, if the inner side of the curved portion 39a of the pin 39 is not in contact with the roller 40, the inner side of the curved portion 39a is connected to the roller 40.
The pin 39 rotates so as to come into contact with the outer periphery of the pin. Accordingly, when the wire 33 is rewound, whichever direction the display unit 12 is facing due to twisting of the wire 33, etc.
The direction in which the inside of 9 contacts the roller 40, that is, the direction in which the louver 41 of the display unit 12 always faces upward is corrected.

Next, FIG. 7 shows the connecting member 3 of the maintenance tool 31.
5 is a diagram showing a state in which 5 is attached to the display unit 12. FIG. Although not shown in FIG. 7, the wire 33 of the maintenance tool 31 is connected to the pin 39.

When the display unit 12 is replaced, the connector 36 of the maintenance tool 31 is inserted into the connector 37 on the back surface of the display unit 12, and the spring 38 is attached.
Hook into the recess of the connector 37 on the side
Fix 7 Next, loosen the screw 71 and display unit 1
2 is removed from the mounting plate 21. Then, by reeling out the reel 34 of the maintenance tool 31, the display unit 12 can be lowered to the ground.

Next, a work procedure for replacing the display unit (LED display unit) 12 using the maintenance tool 31 having the above structure will be described. First, the connector 36 of the maintenance tool 31 is inserted into the connector 37 on the back surface of the display unit 12 to be replaced (FIG. 8, (1)).

Next, the display unit 12 is attached to the mounting plate 21.
Remove the screw 71 fixed to (Fig. 8, (2)).
When the display unit 12 is removed from the mounting plate 21, the rod portion 32 of the maintenance tool 31 is attached to the hole 22 of the mounting plate 21.
(Fig. 9, (3)).

Next, the front and rear positions of the rod portion 32 are adjusted so that the cutout portion 32a of the rod portion 32 is inserted into the end portion of the hole 22 of the mounting plate 21, the rod portion 32 is positioned in the front-rear direction, and the reel is reeled. Then, the control unit 34 is extended to lower the display unit 12 to the ground (FIG. 9, (4)).

When the display unit 12 is lowered to the ground, the display unit 1 to the connector 3 of the maintenance tool 31.
6 is removed and the display unit 12 is removed. Next, on the ground, the connector 36 of the maintenance tool 31 is inserted into the connector 37 of the new display unit 12.

A person who operates the maintenance tool 31 in the maintenance area 13 inside the display device 11 can confirm that a new display unit 12 is attached to the connecting member 35 on the ground.
Rotate the reel 34 clockwise to wind the wire 33,
Raise the display unit 12 to a predetermined position (see FIG. 1).
0, (5)).

When the wire 33 is rewound and the display unit 12 is moved to the tip of the rod portion 32, the wire 33 is wound up to the position where the pin 39 of the connecting member 35 contacts the roller 40. As a result, the inside of the curved portion 39a of the pin 39 contacts the outer periphery of the roller 40, the eccentric roller 40 rotates, and the curved portion 39a of the pin 39 contacts the large radius portion of the roller 40. 39 rotates and louver 4
1 is now facing upwards. After that, the notch portion 32a of the rod portion 32 is removed from the hole 22 of the mounting plate 21, and the rod portion 3
2 is moved backward (FIG. 10, (6)). As a result, the display unit 12 is held at the tip of the rod portion 32 so that the louver 41 always faces upward. In this state, the rod portion 32
If the display unit 12 is pulled out from the hole 22, the display unit 12 can be fixed to the mounting plate 21 by bringing the display unit 12 into contact with the mounting plate 21 with the louver 41 facing upward, and then tightening the screws 71 from the back side in this state. it can.

According to the above-described embodiment, the display device 1
Since the display unit 12 can be exchanged from the inside of 1, it is not necessary to climb an outdoor high place to exchange the display unit 12 for dangerous work. Further, the maintenance work is simplified, so that the work time can be shortened. Further, the display unit is not limited to one using an LED, but may be one using another display element such as a liquid crystal or a fluorescent tube.

In the above-described embodiment, the connection member 35 of the maintenance tool 31 is connected to the connector 37 for connecting the display unit 12 to the power supply board or the like, but the present invention is not limited to this. Alternatively, the maintenance tool 31 may be fixed by another method such as a screw or a fixing jig.

Further, in the above-described embodiment, the display unit 12 is oriented in a fixed direction by using the curved pin 39 and the roller 40, but the present invention is not limited to this, and the wire 33 is wound. Return the display unit 12 to the rod section 3
Display unit 1 when moved to the position of the tip of 2
Any structure may be used as long as 2 can be corrected so as to face a certain direction. For example, a spiral-shaped portion is provided instead of the roller 40, and the shape of the pin 39 is adapted to the spiral-shaped portion, and the pin 39 is brought into contact with the spiral-shaped portion.
May be rewound to correct the orientation of the display unit 12.

[0034]

According to the present invention, since the display unit can be replaced from the inside of the display device, the maintenance work can be performed safely. In addition, since the maintenance work can be performed from the inside of the display device, the work is simplified and the work time can be shortened.

[Brief description of drawings]

FIG. 1A to FIG. 1C are external views of a display device.

FIG. 2 is a front view of a mounting plate.

FIG. 3 is a diagram showing a maintenance tool and a display unit.

FIG. 4 is an external view of a connecting member of the maintenance tool.

5A to 5D are diagrams showing the shape of a pin.

6A to 6C are diagrams showing the shape of a roller.

FIG. 7 is a diagram showing a state in which a connecting member of a maintenance tool is attached to a display unit.

FIG. 8 is an explanatory diagram of a method of replacing the LED display unit (No. 1).

FIG. 9 is an explanatory diagram of a method of replacing the LED display unit (No. 2).

FIG. 10 is an explanatory diagram of a method of replacing the LED display unit (part 3).

[Explanation of symbols]

11 Display 12 Display unit 31 maintenance tools 32 Rod 33 lines 34 reels 35 Connection member

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Claims (4)

(57) [Claims] 1. A connection member connected to a back surface of a display unit, a wire connected to the connection member, a rod portion to which the wire is attached, and a reel for winding or unwinding the wire. A maintenance tool for the display unit. 2. The connection member, when the wire is unwound,
The maintenance tool for a display unit according to claim 1, wherein the maintenance tool has a shape in which the display unit is rotated in contact with a member at the tip of the rod portion so that the orientation of the display unit is constant. 3. When the tip of the connecting member is curved, a roller is provided at the tip of the rod, and when the wire is rewound, the curved portion of the tip of the connecting member comes into contact with the roller to rotate the connecting member, The display unit maintenance tool according to claim 1 or 2, wherein the display unit is configured to face a predetermined direction. 4. The maintenance tool for a display unit according to claim 1, wherein the connection member is connected to the display unit by being inserted into a connector on the back surface of the display unit.