JP4761604B2 - Ceiling access door - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ceiling inspection port.
[0002]
[Prior art]
As shown in FIGS. 6 to 10, a conventionally known ceiling inspection port is a substantially inverted T-shaped outer frame 2 made of aluminum that is fitted into the opening 1 a of the ceiling plate 1 and fixed to the building side. Then, an engaging piece 5 that is rotatably engaged with an engaging piece 4 formed on an end surface of one side along the inner peripheral edge of the plate portion 3 projecting inwardly to the lower end of the outer frame 2 is set up on the rising wall 6. A substantially inverted T-shaped inner frame 7 made of aluminum that opens and closes the inner space of the outer frame 2 on the outer side of one side of the inner frame 7 and the same as the ceiling plate 1 that rests on the plate portion 8 at the inner lower end of the inner frame 7 Of the plate portion 10 provided so as to project outside the lower end of the inner frame 7 in a state where the inner space of the outer frame 2 is closed by the inner frame 7 to which the lid member 9 is attached. The outer periphery is configured so as to be close to the plate portion 3 projecting inside the lower end of the outer frame 2. Reference numeral 11 denotes a spring attached to the inner side of the outer frame 2 in order to press the upper portion of the engagement piece 5 so that the engagement piece 5 is not disengaged from the engagement piece 4.
[0003]
When the inner frame 7 to which the lid member 9 is attached is opened in the ceiling inspection port having such a configuration, if the hand is released from the inner frame 7 in the middle of the opening process, the inner frame 7 becomes the inner frame 7 and the inner frame 7 inside. The lid 9 is pivoted vigorously by the weight of the lid member 9 placed on the lower end plate portion 8, and is located on the pivot center side where the engagement portion between the engagement piece 4 and the engagement piece 5 exists as shown in FIG. The edge of the plate portion 10 projecting outward from the lower end of the inner frame 7 strongly hits the lower surface of the outer frame 2 located on the rotation center side, and the end of the plate portion 10 projecting outward from the lower end of the inner frame 7 There is a problem that at least one of the edge and the lower surface of the outer frame 2 is deformed.
[0004]
[Problems to be solved by the invention]
The present invention solves such a problem, and when opening the inner frame, the edge of the plate portion that projects outside the lower end of the inner frame even if the hand is released from the inner frame in the middle of the opening process is It is intended to prevent deformation of the inner frame and the outer frame without hitting the lower surface.
[0005]
In order to solve this problem, the present invention has a substantially inverted T-shaped outer frame 22 that is fitted to the opening 21a of the ceiling plate 21 and fixed to the building side, and an inner space of the outer frame 22 that opens and closes. An inverted T-shaped inner frame 23 and an engagement piece 26 formed on the end face of one side along the inner peripheral edge of the plate portion 25 projecting inside the lower end of the rising wall 24 of the outer frame 22 are freely rotatable. And an engaging piece 30 formed on the upper surface along one side of the plate portion 29 projecting outward from the lower end of the rising wall 28 of the inner frame 23 to be engaged with the engaging piece 27 so as to be rotatable. In a ceiling inspection port provided with an engagement member 33 having an engagement piece 31 and a cover member 35 placed on a plate portion 34 on the inner lower end of the rising wall 28 of the inner frame 23 , the inner cover member 35 is attached. When the inner space of the outer frame 22 is closed by the frame 23, the engagement piece of the engagement member 33 7 is disengaged from the engagement piece 26 of the outer frame 22 and rests on the plate portion 25 of the outer frame 22, and the inner frame 23 is moved downward from the state where the inner space of the outer frame 22 is closed by the inner frame 23. The inner frame 23 rotates about the engaging portion between the engaging piece 30 and the engaging piece 31 of the engaging member 33, and the engaging piece 27 engages with the engaging piece 26 of the outer frame 22. In summary , the engaging member 33 is configured to rotate around the engaging portion of the engaging piece 27 and the engaging piece 26 of the outer frame 22 . The rising wall 28 of the inner frame 23 between the state the engaging member 33 in the present invention is that the inner frame 23 is closed inner space of the outer frame 22 and opened at an angle of approximately 90 degrees with respect to the outer frame 22 The gist of the present invention is to have a plate portion 32 that contacts the outer surface of one side.
[0006]
With this configuration, the inner frame is connected between the outer frame and the inner frame through an engagement member so that the inner frame can be freely opened and closed. Even if the hand is released from the frame, it does not rotate vigorously until the inner frame contacts the outer frame, and deformation of the inner frame and the outer frame can be prevented.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1 to FIG. 5, the ceiling inspection port according to the present embodiment includes an aluminum substantially inverted T-shaped outer frame 22 that is fitted in the opening 21 a of the ceiling plate 21 and is fixed to the building side, End face of one side along the inner peripheral edge of the plate portion 25 projecting inside the lower end of the rising wall 24 of the outer frame 22 and the substantially inverted T-shaped inner frame 23 made of aluminum that opens and closes the internal space of the frame 22 Formed on the upper surface along one side of a plate portion 29 projecting to the outside of the lower end of the rising wall 28 of the inner frame 23. A state in which the engagement piece 31 is rotatably engaged with the engagement piece 30 and the inner frame 23 is opened at an angle of about 90 degrees with respect to the outer frame 22 from a state in which the inner space of the outer frame 22 is closed. With a plate portion 32 that contacts the outer surface of one side of the rising wall 28 of the inner frame 23 An engagement member 33 made of synthetic resin or synthetic resin, and a lid member 35 of the same material as the ceiling plate 21 mounted on the plate portion 34 at the inner lower end of the rising wall 28 of the inner frame 23. When the inner space of the outer frame 22 is closed by the attached inner frame 23, the outer periphery of the plate portion 29 that projects outside the lower end of the rising wall 28 of the inner frame 23 projects inside the lower end of the outer frame 22. It is configured to be close to the plate portion 25. Incidentally, one end is fixed to the rising wall 24 of the outer frame 22 and the other end is locked to the engaging member 33 so that the engaging piece 27 of the engaging member 33 is engaged when the inner frame 23 is opened and closed. This is a spring for preventing the outer frame 22 from coming off from the engagement piece 26. Incidentally, the engaging portion of the engaging piece 31 of the engaging member 33 with respect to the engaging piece 30 of the inner frame 23 is such that the tip of the engaging piece 31 of the engaging member 33 is in the recess of the engaging piece 30 of the inner frame 23. The inner frame 23 is fitted so as not to come off when the inner frame 23 is opened and closed. Further, 37 is a plate portion projecting outside the lower end of the rising wall 24 of the outer frame 22.
[0008]
In the above configuration, in a state where the inner space of the outer frame 22 is closed by the inner frame 23 to which the lid member 35 is attached, the inner frame 23 is kept closed by the locking means (not shown) with respect to the outer frame 22. At this time, the engagement piece 27 of the engagement member 33 is placed on the plate portion 25 of the outer frame 22 and the engagement of the outer frame 22 with the engagement piece 26 is released as shown in FIG. When the inner frame 23 to which the lid member 35 is attached is rotated downward to release the locking means and open the inner space of the outer frame 22 from this state, the inner frame 23 is engaged with the engagement piece 30 and the engagement member. The engaging member 33 rotates about the engaging portion of the engaging piece 31 and the engaging piece 31, and the engaging member 33 rotates about the engaging portion of the engaging piece 27 and the engaging piece 26 of the outer frame 22. As shown in FIG. 4, the plate portion 32 of the engaging member 33 is raised up to the inner frame 23 until the inner frame 23 is opened at an angle of about 90 degrees with respect to the outer frame 22 as shown in FIG. 4. When the inner frame 23 comes into contact with the outer surface of one side 28 and then the inner frame 23 is further rotated in the opening direction, the rising wall 28 of the inner frame 23 is separated from the plate portion 32 of the engaging member 33. At this time, by rotating until the inner frame 23 becomes substantially horizontal, the back surfaces of the plate portions 29 and 34 of the inner frame 23 are moved toward the plate portions 25 and 37 of the outer frame 22 as shown by a two-dot chain line in FIG. When the inner frame 23 to which the lid member 35 is attached is opened, the plate portions 29 and 34 of the inner frame 23 are not removed even if the hand is released from the inner frame 23 during the opening process. The inner frame 23 and the outer frame 22 can be prevented from being deformed without rotating vigorously until they contact the plate portions 25 and 37 of the frame 22.
[0009]
【The invention's effect】
As described above, according to the present invention, the outer frame and the inner frame are connected via the engagement member so that the inner frame can be opened and closed, and when the inner frame to which the lid member is attached is opened. Even if the hand is released from the inner frame during the opening process, the inner frame does not rotate vigorously until it comes into contact with the outer frame, and deformation of the inner frame and the outer frame can be prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view of a ceiling inspection port according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the main part of the ceiling inspection port.
FIG. 3 is a cross-sectional view showing a state where an inner frame of the ceiling inspection port is closed.
FIG. 4 is a cross-sectional view showing a state in which the inner frame of the ceiling inspection opening is opened at an angle of approximately 90 degrees with respect to the outer frame.
FIG. 5 is a cross-sectional view showing a state where the inner frame of the ceiling inspection opening is opened at an angle larger than 90 degrees with respect to the outer frame.
FIG. 6 is a perspective view of a ceiling inspection port in a conventional example.
FIG. 7 is an exploded perspective view of a main part of the ceiling inspection port.
FIG. 8 is a cross-sectional view showing a state where the inner frame of the ceiling inspection port is closed.
FIG. 9 is a cross-sectional view showing a state in which the inner frame of the ceiling inspection opening is opened at an angle of approximately 90 degrees with respect to the outer frame.
FIG. 10 is a cross-sectional view showing a state in which the inner frame of the ceiling inspection opening is opened at an angle larger than 90 degrees with respect to the outer frame.
[Explanation of symbols]
21 ceiling plate 21a opening 22 outer frame 23 inner frame 24 rising wall 25 plate part 26 engaging piece 27 engaging piece 28 rising wall 29 plate part 30 engaging piece 31 engaging piece 32 plate part 33 engaging member 34 plate part 35 Lid 36 Spring 37 Plate

Claims (2)

A substantially inverted T-shaped outer frame 22 that is fitted to the opening 21a of the ceiling plate 21 and is fixed to the building; a substantially inverted T-shaped inner frame 23 that opens and closes the internal space of the outer frame 22 ; An engagement piece 27 that rotatably engages with an engagement piece 26 formed on an end surface of one side along the inner peripheral edge of the plate portion 25 that projects inside the lower end of the rising wall 24 of the outer frame 22 , and the inner An engagement member 33 having an engagement piece 31 rotatably engaged with an engagement piece 30 formed on the upper surface along one side of the plate portion 29 projecting outside the lower end of the rising wall 28 of the frame 23 ; In the ceiling inspection port provided with a lid member 35 placed on the plate portion 34 at the inner lower end of the rising wall 28 of the inner frame 23 ,
In a state where the inner space of the outer frame 22 is closed by the inner frame 23 to which the lid member 35 is attached, the engagement piece 27 of the engagement member 33 is disengaged from the engagement piece 26 of the outer frame 22 and the outer frame. When the inner frame 23 is rotated downward from the state in which the inner space of the outer frame 22 is closed by the inner frame 23, the inner frame 23 is engaged with the engagement piece 30 and the engagement member 33. The engaging piece 27 is engaged with the engaging piece 26 of the outer frame 22, and the engaging member 33 is engaged with the engaging piece 27 and the outer frame 22. A ceiling inspection port characterized by rotating around an engaging portion with the joint piece 26 . 1 sides of the engaging member 33 is rising wall 28 of the inner frame 23 between a state in which the inner frame 23 is opened at an angle of approximately 90 degrees from the closed inner space of the outer frame 22 relative to the outer frame 22 The ceiling inspection port according to claim 1, further comprising a plate portion 32 that contacts the outer surface.

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