JP2588488Y2 - In-ceiling camera housing - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-ceiling camera housing, and more particularly, to an in-ceiling camera housing configured to mount a surveillance camera under the ceiling.

[0002]

2. Description of the Related Art In recent years, video cameras for surveillance have been installed in rooms, corridors, halls, elevators, underground malls, and the like in buildings, and the state of each place in the building is projected on a monitor television to concentrate on a plurality of places. CCTV (closed circuit television) systems that can be monitored have become widespread. This type of video camera is held in a camera housing and installed at a high place such as a ceiling.

There are two types of camera housings, an outdoor installation type and an indoor installation type, depending on the installation location of the video camera. The outdoor-installed camera housing has a sealed structure that protects the video camera from dust, wind and rain, and is configured to be able to change the mounting angle in the horizontal and vertical directions.

The indoor-installed camera housing protects the video camera in the same manner as the outdoor-installed camera housing, and is configured to house the video camera so as not to make a pedestrian aware of the presence of the video camera, and to make the video camera inconspicuous. . Further, as an indoor installation type, a ceiling-embedded camera housing has been developed in which a camera housing is housed behind a ceiling depending on an installation location and is attached so as to be inconspicuous except for a lens window.

[0005] Such a camera housing with a built-in ceiling has a housing body mounted on the upper surface of the ceiling plate and holding the video camera, and a mounting plate abutting on the lower surface of the ceiling plate. The ceiling plate is fixed by clamping the ceiling plate by tightening bolts and nuts.

[0006]

However, in the above-described camera housing with a built-in ceiling, a bolt is penetrated from below the ceiling plate to the mounting plate, the ceiling plate, and the housing body, and is screwed to a nut above the ceiling plate. Therefore, when the camera installation location is far from the ceiling inspection door, one worker rides on a stepladder or the like and presses the bolt from below, and another worker enters the ceiling and screws the nut onto the bolt. Two workers are needed,
And the installation work took a lot of trouble. In addition, the strength of the ceiling had to be increased so that workers could withstand the ceiling board.

However, when the strength of the ceiling cannot be increased (for example, when using a lightweight board) or when there is no space for an operator behind the ceiling, an inspection port must be provided near the camera installation location. The construction is complicated and the construction cost is high. In addition, even in this case, since the operator must screw the bolt and the nut by groping, there is a problem that the mounting operation is difficult and considerable experience and time are required.

In addition, since the housing body is fixed to the ceiling plate with bolts and nuts, once the video camera is installed, even if it is necessary to change the area to be monitored by the video camera, the orientation of the video camera is changed. There is a problem that cannot be easily changed.

For this reason, for example, when the camera is installed in a place where an unspecified number of people enter and leave, such as an art museum or a department store, it is necessary to make the monitoring with a video camera as conscious as possible. Since it is virtually impossible to change the monitored area after installing the camera,
The widespread use of CCTV systems is due to the fact that it is necessary to carefully consider the mounting position assuming a monitoring screen installed before mounting, and that the direction of the video camera cannot be adjusted while checking the monitoring target area on the monitor TV. Was an obstacle.

Accordingly, an object of the present invention is to provide a camera housing with a built-in ceiling which solves the above problems.

[0011]

SUMMARY OF THE INVENTION The present invention is directed to a ceiling plate having a camera mounting hole, a beam extending above the camera mounting hole of the ceiling plate, and a camera mounted on the beam. A first support plate formed with an insertion slot into which the main body is inserted and an arc-shaped slit positioned around the insertion slot; and a lower surface of the ceiling so as to close a camera mounting hole of the ceiling plate. And a second support plate having a camera holding portion for holding the main body of the camera and a window facing the lens so that the camera lens can capture an object below the ceiling. A mounting bolt which is inserted from below into a hole formed in the support plate and whose leading end is inserted into the arc-shaped slit of the first support plate, and fits into the arc-shaped slit in a non-rotatable state. And movably fitted along the slit, A nut tip biasing the bolt is screwed, the more.

[0012]

The tip of the mounting bolt is inserted into the arc-shaped slit of the first support plate, fitted into the slit in a non-rotatable state, and fitted to the nut movably along the slit. By screwing the parts, the second support plate abutting on the lower surface of the ceiling can be rotated while being guided by the nut and the arc-shaped slit to adjust the horizontal direction of the camera, and the camera mounting hole of the ceiling plate can be adjusted. A first support plate having a slit formed in a beam extending upward is placed, and a mounting bolt is screwed into a nut movably fitted along the slit by penetrating the second support plate. This makes it possible for one person to easily attach it.

[0013]

1 to 3 show an embodiment of a camera housing embedded in a ceiling according to the present invention.

In each of the drawings, a camera housing 1 embedded in a ceiling includes a ceiling plate 2, a lightweight steel frame (beam) 3, and a reinforcing plate (first
Support plate) 4 and a housing body (second support plate) 5
, Mounting bolts 6 and nuts 7. Above the ceiling plate 2, a parallel lightweight steel frame 3 is laid horizontally.
Is provided with a camera mounting hole 8.

As shown in FIG. 4, the reinforcing plate 4 is formed of, for example, a thin sheet metal or the like, and is formed to be longer than the distance between the lightweight steel frames 3 and 3. 9 at both ends of the reinforcing plate 4
Stoppers 4a and 4b bent at an angle of 0 degrees are provided. The stoppers 4a, 4b prevent the reinforcing plate 4 from falling off the lightweight steel frames 3, 3 and increase the strength of the reinforcing plate 4. The reinforcing plate 4 is also provided with reinforcing ribs 4c and 4d bent at the front and rear edges, and temporary fixing holes 4e are formed near four corners.

Before the ceiling plate 2 is fixed below the lightweight steel frame 3, the reinforcing plate 4 is placed on the lightweight steel frame 3, which is placed above the video camera installation location. Then, the reinforcing plate 4 is temporarily fixed to the lightweight steel frames 3 and 3 by passing wires or the like through the holes 4e for temporary fixing and the lightweight steel frames 3 and 3.

Further, the reinforcing plate 4 has a rectangular insertion opening 10 into which the main body 9a of the video camera 9 is inserted at the center, and symmetrically disposed on both sides of the insertion opening 10 with the same radius from the center of the insertion opening 10. Arc-shaped slits 11 and 1 provided
2 are drilled. These slits 11 and 12 are 45
A circular hole 13 is formed at one end in an angle range of degrees. The diameter D of the hole 13 is larger than the slit width S. The slits 11 and 12 are formed so as to be located inside the camera mounting hole 8 of the ceiling plate 2.

As shown in FIGS. 5 and 6, the housing main body 5 is formed by stamping a sheet metal into a circular shape, and is placed in contact with the lower surface of the ceiling plate 2 so as to close the camera mounting hole 8 of the ceiling plate 2. Is fixed. Further, the housing body 5 has a flange portion 5a having a larger diameter than the camera mounting hole 8,
In a state where the entire camera mounting hole 8 is closed, it faces the reinforcing plate 4 placed on the lightweight steel frame 3. The housing main body 5 includes a camera holding portion 14 that holds the main body portion 9a of the video camera 9 on the upper surface side, a bracket 15 that supports the camera holding portion 14 so that the camera holding portion 14 can be vertically rotated, and a video camera 9 that projects to the lower surface side. It has a cover 16 for covering the lens 9b, and holes 17a, 17b for mounting bolts penetrating at a flange portion 5a on the outer periphery of the cover 16 at intervals of 180 degrees.

The camera holder 14 has a U-shaped cross section.
Bottom section 14 on which main body section 9a of video camera 9 is mounted and fixed
a and side plates 14b and 14c sandwiching both side surfaces of the main body 9a at both ends of the bottom portion 14a. The direction of the video camera 9 in the vertical direction (A direction) can be changed by loosening the screw 18 for fixing the camera holding portion 14 to the bracket 15.

The cover 16 is provided with a window 19 opening below the ceiling plate 2, and the video camera 9 is mounted via the window 19 so that a lens 9 b can capture an object below the ceiling plate 2. Note that the window 19 has an opening area that can sufficiently capture an object below the ceiling plate 2 even when the position of the lens 9b is changed within the vertical adjustment range of the video camera 9. Therefore, only the cover 16 of the housing body 5 can be seen from below the ceiling plate 2, and the video camera 9 is stored behind the ceiling in a state where the lens 9b is difficult to see.

Here, an operation of mounting the camera housing 1 having the above-described configuration will be described.

First, when the above-mentioned lightweight steel frames 3, 3 are laid horizontally, the reinforcing plate 4 is placed so as to straddle the lightweight steel frames 3, 3 laid horizontally in parallel with the camera installation location. Then, as described above, the reinforcing plate 4 is temporarily fixed to the lightweight steel frames 3, 3 by passing wires or the like through the holes 4e for temporary fixing and the lightweight steel frames 3, 3. In addition, when there is no possibility that the reinforcing plate 4 will fall off, the temporary fixing may not be performed.

Next, when the ceiling plate 2 is fixed downward to the lightweight steel frames 3, 3, the ceiling plate 2 having the camera mounting holes 8 is attached so as to be located below the reinforcing plate 4. When the installation work of the ceiling plate 2 is completed, the operator can use the flange 7 of the nut 7 from below the camera mounting hole 8 as shown in FIG.
The hexagonal portion 7b of the nut 7 is inserted into the slits 11 and 12 of the reinforcing plate 4 with "a" facing upward. The flange 7a of the nut 7 has a diameter larger than the slit width of the slits 11 and 12, but is smaller than the hole 13 so that it can be easily fitted into the slits 11 and 12.

The opposite side of the hexagonal portion 7b of the nut 7 slides against the edges of the slits 11 and 12, and can move in an arc along the slits 11 and 12. Furthermore, the nut 7 is a hexagonal part 7
Since the opposite side of b is fitted in a state of contacting the edges of the slits 11 and 12, the movement in the rotation direction is restricted. In addition, the nut 7 is slid in advance on the ends of the slits 11 and 12 opposite to the hole 13 so that the position of the mounting bolt 6 can be easily adjusted.

Subsequently, as shown in FIG. 7, the video camera 9 is fixed to the camera holding portion 14 of the housing body 5, and the mounting bolt 6 is inserted into the holes 17a and 17b of the flange portion 5a. At this time, the mounting bolt 6 is inserted into the holes 17a and 17b with the head 6a facing downward and the screw 6b facing upward. still,
The head 6a of the mounting bolt 6 is provided with holes 17a and 17b of the flange 5a.
Because it has a larger diameter, it comes into contact with the lower surface of the flange 5a.

Next, with the housing body 5 shown in FIG. 7 facing the camera mounting hole 8 of the ceiling plate 2, the tips of the two mounting bolts 6 are fitted into the slits 11 and 12 through the camera mounting hole 8. To the nut 7 to be screwed.
Thereafter, the head 6a of the mounting bolt 6 is turned using a tool such as a screwdriver to tighten the mounting bolt 6 and the nut 7. At this time, the head 6a of the mounting bolt 6 is turned in the tightening direction so that the nut 7 does not come out above the slits 11 and 12.

Before completely tightening the mounting bolts 6, an image captured by the video camera 9 is displayed on a monitor television (not shown) to adjust the mounting angle of the video camera 9. Up and down direction of video camera 9 (A direction)
When adjusting the direction of the camera holding unit 1 as described above,
By loosening the screw 18 for fixing the video camera 9 to the bracket 15, the vertical direction of the video camera 9 can be changed.

The horizontal direction (B direction) of the video camera 9
When the direction of the video camera 9 is adjusted, the nut 7 slides along the slits 11 and 12 by rotating the housing main body 5 so that the horizontal direction of the video camera 9 can be easily changed. When the adjustment of the orientation of the video camera 9 is completed in this way, the mounting bolts 6 are further tightened and fixed to the ceiling plate 2. That is, since the mounting bolts 6 are tightened in the state where the ceiling plate 2 and the lightweight steel frame 3 are interposed between the housing body 5 and the reinforcing plate 4, the ceiling plate 2 and the lightweight steel frame 3 are sandwiched from above and below. .

When the housing body 5 is fixed in contact with the ceiling plate 2, the video camera 9 is housed above the ceiling plate 2, and the video camera 9 is visible from below because the lens 9 b is surrounded by the cover 16. Hateful. Therefore, a person who has become a subject in a place where an unspecified number of people enter and exit, such as an art museum or a department store, does not need to be conscious of the video camera 9.

As described above, since the video camera 9 can be easily mounted on the camera housing 1 embedded in the ceiling, for example, even one worker can easily mount the camera on the ceiling. In addition, since the video camera 9 can be rotated not only vertically but also horizontally, it is possible to adjust the monitoring area of the video camera 9 while watching the monitor television at the time of mounting.

If it is desired to change the monitoring area even after the mounting is completed, the mounting bolts 6 are loosened and the housing body 5 is lowered from the ceiling plate 2 in the same manner as in the above mounting, so that the video camera 9 can be moved vertically and horizontally. Direction can be easily adjusted.

FIGS. 8A to 8C show modified examples of the present invention.

In FIG. 8, a reinforcing plate 21 is formed by connecting two reinforcing plate halves 22 and 23 with hinges 24 and 25, and as shown by a dashed line in FIG. It can be folded to the size of. Therefore, even after the ceiling plate 2 has already been fixed to the lightweight steel frame 3, the reinforcing plate 21 can be inserted into the back of the ceiling through the camera mounting hole 8 in a folded and compact state.

In this case, after the reinforcing plate 21 is inserted into the space above the ceiling, the reinforcing plate 21 is developed on the lightweight steel frame 3 as shown in FIGS. Therefore, even after the ceiling plate 2 is fixed, the video camera 9 can be easily housed behind the ceiling, and the vertical and horizontal directions of the video camera 9 can be easily adjusted as in the above-described embodiment.

[0035]

As described above, in the camera housing with embedded ceiling according to the present invention, the tip of the mounting bolt is inserted into the arc-shaped slit of the first support plate and fitted into this slit in a non-rotatable state. At the same time, the tip of the mounting bolt is screwed into a nut movably fitted along the slit, thereby rotating the second support plate abutting on the lower surface of the ceiling while being guided by the nut and the arc-shaped slit. The horizontal orientation of the camera can be adjusted, and the area monitored by the camera can be changed to any direction. Further, a first support plate having a slit formed in a beam transversely mounted above the camera mounting hole of the ceiling plate is placed, and a mounting bolt is allowed to penetrate the second support plate and move along the slit. By screwing the nut into the nut fitted to the nut, even one operator can easily mount the nut, and even a relatively inexperienced operator can efficiently mount the nut. In addition, since the worker does not need to enter the ceiling, there is a feature that the inspection hole does not need to be provided on the ceiling.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of a camera housing embedded in a ceiling according to the present invention.

FIG. 2 is an exploded perspective view of a camera housing embedded in a ceiling.

FIG. 3 is a vertical cross-sectional view showing a mounting state of a nut.

FIG. 4 is a view for explaining a reinforcing plate.

FIG. 5 is a plan view of a housing body.

FIG. 6 is a side view of the housing body.

FIG. 7 is a front view showing a state where mounting bolts are inserted into the housing body.

FIG. 8 is a view for explaining a modified example of the reinforcing plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceiling embedded camera housing 2 Ceiling board 3 Light-weight steel frame 4, 21 Reinforcement plate 5 Housing main body 6 Mounting bolt 7 Nut 8 Camera mounting hole 9 Video camera 11, 12 Slit 14 Camera holding part

Claims (1)

(57) [Scope of request for utility model registration] 1. A ceiling plate provided with a camera mounting hole, a beam laid over the camera mounting hole of the ceiling plate, and an insertion placed on the beam and into which a camera body is inserted. A first support plate in which a mouth and an arc-shaped slit positioned around the insertion slot are perforated; and a body of the camera which abuts on a lower surface of the ceiling so as to close a camera mounting hole of the ceiling plate. A camera holding unit for holding the unit and a window facing the lens so that the camera lens can capture an object below the ceiling.
A mounting bolt which is inserted from below into a hole formed in the second support plate and whose tip is inserted into an arc-shaped slit of the first support plate; and the arc-shaped slit And a nut into which the tip of the mounting bolt is screwed to fit in a non-rotatable state and movably fit along the slit.