JPH0734106Y2 - Ceiling access door - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a ceiling inspection port.

[0002]

2. Description of the Related Art As a conventional ceiling inspection port of this type, there is one disclosed in Japanese Utility Model Publication No. 51-18595.

This ceiling inspection port is composed of a rectangular outer frame and a rectangular inner frame which is detachably fitted in the outer frame. The inner frame has a protruding shaft that protrudes toward the outer frame, and the protruding shaft is inserted into the front and rear grooves formed on the inner surfaces of the left and right side walls of the outer frame. Is attached so as to be openable and closable, and has a lock portion for maintaining a closed state in a portion near the front.

Further, this ceiling inspection port is provided with a vertical groove communicating downward from the groove and extending downward so that the protruding shaft, which is a rotating shaft, does not slide in the groove when the inner frame is opened and closed. By falling into the vertical groove, it is fixed at a predetermined position in the groove.

[0005]

However, in such a ceiling inspection port, when removing the inner frame from the outer frame, after unlocking and rotating the inner frame so that the front side is downward, Had to be lifted upwards to allow the protruding shaft to escape from the vertical groove, and then to pull out the protruding shaft from the groove of the outer frame, which was troublesome.

Therefore, the present invention provides a ceiling inspection port through which the inner frame can be easily removed from the outer frame without lifting the inner frame upward.

[0007]

In order to solve the above-mentioned problems, the present invention comprises a rectangular outer frame and a rectangular inner frame which is detachably fitted in the outer frame. The outer frame near the rear of the wall is provided with a projecting shaft that projects toward the outer frame, and the projecting shaft is fitted into the front and rear grooves formed on the inner surfaces of the left and right side walls of the outer frame. On the other hand, the projecting shaft is used as a rotating shaft to be openably and closably supported, and a lock device for locking the inner frame and the outer frame is provided in the front portion of the inner frame, and the inner frame is fitted into the outer frame and closed. In this state, the outer frame is provided with a protruding shaft holding member that sandwiches the front and rear of the protruding shaft fitted in the groove of the outer frame, and the protruding shaft holding member located on the front side of the protruding shaft is pressed in the front-back direction of the protruding shaft. The ceiling inspection port is formed by an elastic rod that bends vertically due to force and allows sliding in the groove of the outer frame of the protruding shaft. Configuration was.

[0008]

In the ceiling inspection port according to the present invention, when removing the inner frame from the outer frame, first release the locking device, rotate the inner frame so that the front side is downward, and then move the inner frame forward. When pulled strongly, the protruding shaft pushes the protruding shaft holding member on the front side forward, so that the holding member bends downward and the protruding shaft rides over the protruding shaft holding member so that the protruding shaft can slide forward in the groove. Therefore, the protruding shaft can be pulled out from the groove and the inner frame can be removed from the outer frame.

When the removed inner frame is fitted into the outer frame, the protruding shaft is fitted into the groove of the outer frame while the front side of the inner frame is facing downward, and then the inner frame is attached to the outer frame. When pushing strongly backward, the protruding shaft pushes the protruding shaft holding member backward, so that the protruding shaft holding member bends downward and the protruding shaft rides over the protruding shaft holding member and the other protruding shaft behind The locking device comes into contact with the holding member and is sandwiched between the two protruding shaft holding members, so that the protruding shaft can be stopped from sliding, and the front side of the inner frame is pulled up to rotate and fit into the outer frame to lock. It can be fixed with.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The ceiling inspection port is composed of an outer frame 11 mounted in a rectangular opening 2 provided in the ceiling 1 and an inner frame 14 detachably fitted in the outer frame 11.

The outer frame 11 is composed of a rectangular frame body having four side walls, and a hanging metal fitting 12 provided at a corner portion.
Is a suspension bolt 13 suspended from a channel material behind the ceiling.
It is fixed to the opening 2 of the ceiling 1 by being attached to.

The inner frame 14 is a rectangular frame body having four side walls, and is fitted inside the outer frame 11. A ceiling plate 15 is fitted inside the inner frame 14. The ceiling plate 15 is attached to the lower surface of the L-shaped member 16 fixed to the inner surface of the side wall of the inner frame 14 by wood screws 17.

Projecting shafts 19 projecting toward the outer frame 11 side are formed on the outer surfaces of the rear side portions of the left and right side walls forming the inner frame 14.

On the other hand, on the inner surfaces of the left and right side walls constituting the outer frame 11, grooves 18 into which the protruding shafts 19 of the inner frame 14 are fitted are formed in the front-rear direction.

In the inner frame 14, the protruding shaft 19 is attached to the outer frame 11.
By fitting in the groove 18 of
It is possible to open and close by using the protruding shaft 19 as a rotating shaft.

Further, in the portion of the inner frame 14 near the front,
By rotating the operation shaft 21 of the lock device 20, a rod 23 that appears sideways on the left and right side walls of the inner frame 14.
And a lock hole into which the tip of the rod 23 is fitted is formed in the outer frame 11.

With the inner frame 14 closed, the operating shaft 21 of the lock device 20 is rotated to rotate the rod 23 of the inner frame 14.
Is inserted into the lock hole of the outer frame 11, the closed state of the inner frame 14 is maintained. Conversely, if the rod 23 of the inner frame 14 is pulled out from the lock hole of the outer frame 11 from the closed state, the inner frame 14 projects. The inner frame 14 is opened by rotating the shaft 19 as a rotating shaft.

The outer frame 11 is provided with a projecting shaft holding member which sandwiches the projecting shaft 19 which is fitted in the groove 18 of the outer frame 11 in a state where the inner frame 14 is fitted and closed. This protruding shaft holding member is provided with a stopper portion 27 located on the rear side of the protruding shaft 19 and a protruding shaft 19 located on the front side of the protruding shaft 19 and bent in the up-down direction to fit in the groove 18 of the outer frame 11. And an elastic portion that enables the slide of the. Above stopper part 2
The block 7 is formed by fixing the block in the groove 18 of the outer frame 11. In addition, the elastic portion is an elastic rod 2 bent in a mountain shape.
The bent portion 2 of the elastic rod 24 is formed by 4
The rear end of the elastic rod 24 is fixed to the side surface of the block forming the stopper portion 27 via a screw 28 so that 6 is located on the front side of the protruding shaft 19. Further, the front end of the elastic rod 24 is fitted into a receiving groove 25 formed below the groove 18 on the side wall of the outer frame 11 and having an opening on the upper side.
When the bent portion 4 is pressed in the front-back direction, the front end of the elastic rod 24 slides along the receiving groove 25, and the bent portion 2
6 is flexible in the vertical direction.

When the inner frame 14 is fitted into the outer frame 11,
When the inner frame 14 is inserted into the groove 18 with the front side facing downward and is hung on the outer frame 11, and then the inner frame 14 is strongly pushed while sliding rearward, the projecting shaft 19 causes the elastic rod 19 to slide. Since the bent portion 26 of 24 is pressed backward, the elastic rod 24
The front end of the slides forward, the bent portion 26 bends downward, the protruding shaft 19 gets over the bent portion 26, and the stopper portion 2
It comes into contact with 7 and cannot slide back and forth, and is fixed at a predetermined position in the groove 18.

Thereafter, the front side of the inner frame 14 is lifted upward, and the inner frame 14 is rotated around the projecting shaft 19 as a rotation shaft, fitted into the outer frame 11, and the inner frame 1 is locked by the locking device.
4 is locked to the outer frame 11.

When the inner frame 14 is to be removed from the outer frame 11, a lock device is used to unlock the inner frame 14 and the outer frame 11 so that the inner frame 14 is positioned so that the front side is downward. When the inner frame 14 is strongly pulled forward after being rotated about 19 as the rotation axis, the protruding shaft 19 presses the bent portion 26 of the elastic rod 24 forward, so that the front end of the elastic rod 24 moves forward in the receiving groove 25. Slides to bend the bent portion 26 downward,
Since the rod crosses the bent portion 26, the protruding shaft 19 can slide in the groove 18.

After that, the inner frame 14 is removed from the outer frame 11 so as to be pulled out from the protruding shaft 19 and the groove 18.

In the illustrated case, the protruding shaft 19 is sandwiched between the stopper portion 27 and the bent portion 26 of the elastic rod 24 to be fixed in the groove 18, but the elastic rod 24 is newly bent. Then, the protruding shaft 19 may be sandwiched between the bent portion and the bent portion 26.

[0025]

[Effect] Since the ceiling inspection port according to the present invention is configured as described above, when the protruding shaft is slid in the groove to attach / detach the inner frame to / from the outer frame, the ceiling frame is moved forward or backward in the inner frame. Since it is only necessary to apply force, the inner frame can be easily attached to and detached from the outer frame without the labor required in the past.

[Brief description of drawings]

FIG. 1 is a bottom view showing an example of implementation.

FIG. 2 is a side view of the above.

FIG. 3 is an enlarged vertical side view of the main part.

FIG. 4 is an enlarged front view of the same section.

FIG. 5 is an exploded perspective view of essential parts.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceiling board 2 Opening 11 Outer frame 12 Hanging metal fitting 13 Hanging bolt 14 Inner frame 15 Ceiling board 18 Groove 19 Projection shaft 20 Lock device 24 Elastic rod 25 Receiving groove 26 Bending part

Claims (1)

[Scope of utility model registration request] 1. A projecting shaft which comprises a rectangular outer frame and a rectangular inner frame which is detachably fitted in the outer frame, and which protrudes toward the outer frame on the outer surface of the left and right side walls of the inner frame near the rear side. By installing this protruding shaft in the front and rear grooves formed on the inner surfaces of the left and right side walls of the outer frame, the inner frame is supported with respect to the outer frame so that the protruding shaft can be opened and closed, A locking device for locking the inner frame and the outer frame is provided in the front portion of the inner frame, and when the inner frame is fitted in the outer frame and closed, the front and rear of the protruding shaft fitted in the groove of the outer frame. The protruding shaft holding member that sandwiches the protruding shaft is provided in the outer frame, and the protruding shaft holding member located on the front side of the protruding shaft is bent in the vertical direction by the pressing force of the protruding shaft in the front-rear direction, and A ceiling inspection port formed by an elastic rod that allows sliding.