JP4749269B2 - Fixture and method for hanging ceiling-mounted equipment - Google Patents

Description

  The present invention relates to a mounting device and a mounting method for a ceiling-suspended device, and more particularly to a mounting device and a mounting method for a dome type surveillance camera on a ceiling.

2. Description of the Related Art Conventionally, there is a dome type surveillance camera embedded so as not to stand out on the ceiling of a building (see, for example, Patent Document 1). In addition to the one described in Patent Document 1, there is a dome type surveillance camera shown in FIGS. 6 (a) and 6 (b).
This dome-type surveillance camera (7) is embedded in an opening (60) opened in the ceiling (6) through a fixture (1) which is a bracket. The fixture (1) is formed by bending a metal plate, and includes a support piece (10) to which the dome-type surveillance camera (7) is attached and a contact piece (11) in contact with the lower surface of the ceiling (6). . A holding piece (3) is pivotally supported (3a) on the fixture (1), and a dome shape is formed by holding the tip of the holding piece (3) and the abutting piece (11) and the peripheral edge of the opening (60). The surveillance camera (7) is held on the ceiling (6).

To attach the fixture (1) to which the dome-type surveillance camera (7) is attached to the ceiling (6), with the holding piece (3) raised, attach the fixture (1) from below the ceiling (6). Insert into opening (60). With the abutting piece (11) in contact with the lower surface of the ceiling (6), the screw shaft (4) is inserted from the lower side of the abutting piece (11), and the pressing piece (3) is rotated downward. The tip end portion of the screw shaft (4) is screwed into the pressing piece (3), and the peripheral edge portion of the opening (60) is sandwiched between the tip end portion of the pressing piece (3) and the contact piece (11). Moreover, you may press the holding | suppressing piece (3) with this front-end | tip part, without screwing the front-end | tip part of a screw shaft (4) to the holding | suppressing piece (3). Thereby, the dome type surveillance camera (7) is attached to the ceiling (6) via the fixture (1).
Although only one press piece (3) is shown in the figure, this is for convenience of illustration, and a plurality of press pieces (3) are provided around the fixture (1).

JP 2000-244782 A

In the fixture (1) shown in FIGS. 6 (a) and 6 (b), since the holding piece (3) is rotated around the fixed pivot (3a), the rotation range of the holding piece (3) is set. It is necessary to provide a large space. For this reason, a large space is required behind the ceiling (6) for housing the fixture (1), and it is necessary to consider the mounting position.
An object of the present invention is to provide an attachment that can be attached without requiring a large space behind the ceiling (6).

The fixture of the ceiling-suspended device is fitted into the opening (60) of the ceiling (6), and a support piece (10) for supporting the device by hanging and a contact piece (11) in contact with the lower surface of the ceiling (6) A connecting piece (2) for connecting the support piece (10) and the abutting piece (11), and a holding piece (3) in contact with the upper surface of the ceiling (6),
The holding piece (3) is provided so that it can be moved up and down along the shaft fitted in the contact piece (11).
The holding piece (3) is in the upright position, and rotates downward in contact with the connecting piece (2) along the shaft from the first position. Is provided so as to be movable between a second position where the ceiling (6) is sandwiched between the contact piece (11) and the contact piece (11).

The fixture (1) is inserted into the opening (60) of the ceiling (6) at the first position where the pressing piece (3) stands. With the abutting piece (11) in contact with the lower surface of the ceiling (6), the pressing piece (3) is lowered along the shaft. The holding piece (3) rotates downward in contact with the connecting piece (2) in the middle of lowering, and reaches a second position where the tip part contacts the upper surface of the ceiling (6). The fixture (1) is attached to the peripheral edge portion of the opening (60) of the ceiling (6) by the pressing piece (3) and the contact piece (11).
That is, the pressing piece (3) is attached to the ceiling (6) at the second position that is lowered from the first position and rotated downward. As a result, the fixture (1) can be mounted without requiring a large space behind the ceiling (6) as compared to the conventional configuration in which the holding piece (3) is rotated around the pivotal support. Can do.
Further, since the holding piece (3) is inserted into the opening (60) of the ceiling (6) in a standing posture, the size of the opening (60) can be reduced. Furthermore, it is possible to mount the fixture stably with a small number of parts.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of the fixture (1) as viewed from below, and is attached to the peripheral edge of the opening (60) of the ceiling (6), as in the prior art. The fixture (1) is configured by bending a metal plate, and a flat support piece (10) to which the dome-type surveillance camera (7) is attached and a pair of contact pieces (in contact with the lower surface of the ceiling (6)). 11) (11), the support piece (10) and the contact piece (11) are connected, and the support piece (10) and the connection piece (2) (2) orthogonal to the contact piece (11) are provided. The support piece (10) has through holes (12) and (12) for screwing the dome type surveillance camera (7).

The screw shaft (4) is inserted from below the contact piece (11), and the tip of the screw shaft (4) passes through the receiving plate (20) protruding from the connecting piece (2) to receive the receiving plate (20). Screw onto the cap nut (40) placed on top. As a result, the screw shaft (4) is prevented from dropping, and the head (4a) of the screw shaft (4) is in contact with the lower surface of the abutting piece (11).
Between the receiving plate (20) and the abutting piece (11), a substantially U-shaped intermediate member (5) is screwed onto the screw shaft (4), and a pressing piece (on the outside of the intermediate member (5)). 3) Screw (50) is stopped. The pressing piece (3) is provided so as to be rotatable about the screw (50) with respect to the intermediate member (5).
In FIG. 1, the pressing piece (3) is provided only on one connecting piece (2), but this is for the convenience of illustration and may be provided on both connecting pieces (2).
The inner edge (G in FIG. 1) of the intermediate member (5) is close to or in contact with the side surface of the connecting piece (2), and the intermediate member (5) is connected even if the screw shaft (4) is rotated. Cannot rotate by touching the side of (2). Therefore, when the screw shaft (4) is rotated, the intermediate member (5) moves up and down together with the pressing piece (3).

The holding piece (3) is configured by connecting the tip of an arm (30) having a hole (34) through which a screw (50) passes through a pressing plate (31), and the pressing plate (31) is connected to the ceiling. Hold down the top surface of (6). A protruding plate (32) protrudes outward from the lower end of the base end of the arm (30).
On the connecting piece (2), a through hole (21) and (21) into which the corner (33) of the base end of the arm (30) fits is opened up and down, and the side of the through hole (21) is opened. From the side, guide pieces (8) and (8) protrude outward. The guide piece (8) forms a cam surface (80) whose lower end edge is inclined outward and upward, and the lower end edge of the through hole (21) is at substantially the same height as the lower end of the cam surface (80). As will be described later, when the pressing piece (3) is raised, the protruding plate (32) is brought into contact with the cam surface (80) to rotate the pressing piece (3) upward.

In FIG. 1, the holding piece (3) is oriented sideways in the longitudinal direction. However, when the fixture (1) is attached to the ceiling (6), the holding piece (3) is in an upright state, that is, in an upright position. is there. That is, the holding piece (3) is inserted into the opening (60) in a standing posture, and after the insertion, the holding piece (3) is horizontally lowered and attached to the ceiling (6).
2 is a view of the pressing piece (3) in the standing posture as seen from the direction A in FIG. 1, and FIG. 3 (a) is a view of FIG. 2 as seen from the direction C. As described above, the corner (33) of the base end of the arm (30) is initially fitted into the through hole (21) and is in contact with the lower end edge of the through hole (21). When attaching the fixture (1) to the ceiling (6), since the holding piece (3) is in the standing position, the width of the holding piece (3) (L in FIG. 2) is widened to the width of the connecting piece (2). Can be provided. By providing a wide width of the pressing piece (3), the fixture (1) can be stably attached to the ceiling (6).

  As shown in FIG. 3A, when the screw shaft (4) is rotated from the lower side of the abutting piece (11) in a state where the holding piece (3) stands up (referred to as the first position), The holding piece (3) is assumed to descend. However, since the corner (33) is in contact with the lower edge of the through hole (21), the pressing piece (3) can no longer be lowered. Therefore, as shown in FIG. 3 (b), the holding piece (3) rotates clockwise (arrow B direction) around the screw (50). As shown in FIG. 3 (c), the base end of the arm (30) is in contact with the connecting piece (2) with the holding piece (3) rotated approximately 90 degrees downward to become substantially horizontal. The arm (30) is restricted from rotating. When the pressing plate (31) is opposed to the top surface of the ceiling (6) and the screw shaft (4) is further rotated, the pressing piece (3) is lowered, and the pressing plate (31) and the contact piece (11) The peripheral edge of the opening (60) of the ceiling (6) is clamped (referred to as the second position).

(Mounting fixture)
4 (a) and 4 (b) are views showing a state in which the fixture (1) is attached to the ceiling (6). A dome-type surveillance camera (7) is previously attached to the support piece (10) of the fixture (1). To attach the fixture (1) to the ceiling (6), as shown in FIG. 4 (a), hold the fixture (1) with the holding piece (3) in the upright position (first position). Insert into the opening (60) in the ceiling (6). If the head (4a) of the screw shaft (4) is rotated from the lower side of the contact piece (11) with the contact piece (11) in contact with the lower surface of the ceiling (6), as described above The piece (3) rotates downward, and as shown in FIG. 4 (b), the pressing plate (31) presses the upper surface of the ceiling (6) (second position). Since the peripheral part of the ceiling (6) is sandwiched between the pressing piece (3) and the contact piece (11), the fixture (1) is attached to the ceiling (6). Finally, a decorative cover (61) is attached to close the peripheral edge of the opening (60).
In this example, the pressing piece (3) is attached to the ceiling (6) at a second position that is lowered from the first position and rotated downward. Thereby, the fixture (1) can be attached without requiring a large space behind the ceiling (6) as compared with the conventional configuration in which the pressing piece (3) is merely rotated. Further, since the holding piece (3) is inserted into the opening (60) of the ceiling (6) in a standing posture, the size of the opening (60) can be reduced.
In addition, the mounting tool (1) can be attached to the ceiling (6) simply by rotating the screw shaft (4) from the lower side of the contact piece (11), and the workability is good. Furthermore, it is possible to mount the fixture stably with a small number of parts.

(Removal of fixture)
The fixture (1) may be removed from the ceiling (6) when the dome-type surveillance camera (7) is repaired or replaced. The attachment (1) is removed by the following procedure.
First, as shown in FIG. 5 (a), the screw shaft (4) is rotated in the opposite direction to the above, and the pressing piece (3) is raised. However, in this state, the fixture (1) falls as much as the rise of the holding piece (3), so it is necessary to hold down the contact piece (11) so as to contact the lower surface of the ceiling (6). When the presser piece (3) is further raised, as shown in FIGS. 5 (b) and 5 (c), the protruding plate (32) comes into contact with the cam surface (80) of the guide piece (8) and the presser piece (3) is moved. Rotate upward about the screw (50). As shown in FIG. 5 (d), the pressing piece (3) is in the standing posture in a state where the protruding plate (32) is detached from the cam surface (80). Since the tip of the pressing piece (3) is located inside the opening (60), the fixture (1) can be removed from the ceiling (6) by lowering the fixture (1).
When removing the fixture (1), the screw shaft (4) has only to be rotated from the lower side of the abutting piece (11), so that workability is good.

The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. In addition, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.
In this example, the dome type surveillance camera (7) is exemplified as the device to be suspended from the ceiling (6). However, the present invention is not limited to this, and for example, a projector or the like may be used.

It is the disassembled perspective view which looked at the fixture from the lower side. It is the figure which looked at the holding piece in a standing posture from the A direction of FIG. (a), (b), (c) is a figure which shows the state which attaches a fixture to a ceiling. (a), (b) is a figure which shows the state which attaches a fixture to a ceiling. (a), (b), (c), (d) is a figure which shows the state which removes an attachment tool from a ceiling. (a), (b) is a figure which shows the state which attaches the conventional fixture to a ceiling.

Explanation of symbols

(1) Mounting tool
(2) Tie pieces
(3) Presser piece
(4) Screw shaft
(6) Ceiling
(8) Guide piece
(10) Support piece
(11) patch
(60) Opening

Claims (4)

Fitted in the ceiling of the opening, a support piece for supporting hanging device, and the contact piece in contact with the lower surface of the ceiling, the connecting piece connecting the support piece and the contact piece, a pressing piece which is in contact with the upper surface of the ceiling comprises,
The pressing piece is provided so as to be movable up and down along a shaft body fitted in the contact piece,
Said pressing piece rotated downward in contact with the first position, the connecting piece on the way down along the shaft from the first position is a vertical position, wherein the tip in contact with the upper surface of the ceiling It is provided so as to be movable between a second position for sandwiching the ceiling with the contact piece,
A fixture for a ceiling-suspended apparatus, wherein the connecting piece is provided with a guide piece for guiding the upward rotation of the pressing piece raised from the second position to the first position. . The said shaft body is a fixture of the ceiling suspension type apparatus of Claim 1 which is the screw shaft screwed together in the said contact piece. A support piece that fits into the opening of the ceiling and suspends and supports the device, a contact piece that contacts the lower surface of the ceiling, a connecting piece that connects the support piece and the corresponding piece, and a pressing piece that contacts the upper surface of the ceiling,
The pressing piece is provided so as to be able to move up and down along a shaft body fitted into the piece,
The holding piece is in a standing position, and rotates downward in contact with the connecting piece while descending along the shaft from the first position, and the tip is in contact with the upper surface of the ceiling. It is provided so as to be movable between a second position for sandwiching the ceiling with the contact piece,
The connecting piece is a method of attaching a fixture for a ceiling-suspended device provided with a guide piece for guiding the upward rotation of the pressing piece raised from the second position to the first position. And
In a state where the pressing piece is in the first position, raising a fixture and bringing the contact piece into contact with the lower surface of the ceiling;
A ceiling-suspended apparatus comprising a step of rotating the shaft body, causing the pressing piece to rotate downward, reaching the second position, and sandwiching the ceiling between the pressing piece and the abutting piece. How to install the fixture. The method of attaching a ceiling-suspended device according to claim 3, wherein the shaft body is a screw shaft screwed into the contact piece.

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