JP2001295459A - Ceiling access door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deformation of an inner frame and an outer frame without contact between the edge of a plate portion extending to the outside of the lower end of the inner frame and the lower face of the outer frame if a hand is moved apart from the inner frame on the process of opening the inner frame. SOLUTION: This ceiling access door comprises the outer frame 22 to be fitted to an opening portion 21a of a ceiling plate 21 and fixed to a building side, the inner frame 23 for opening/closing an internal space of the outer frame 22, an engagement member 33 having an engagement piece 27 to be rotatably engaged with an engagement piece 26 formed on the end face of one side along the inner periphery edge of a plate portion 25 extending to the inside of the lower end of a rising wall 24 of the outer frame 22 and an engagement piece 31 to be rotatably engaged with an engagement piece 30 formed on the upper face along one side of a plate portion 29 extending to the outside of the lower end of a rising wall 28 of the inner frame 23, and a cover 35 to be placed on a plate portion 34 at the inside lower end of the rising wall 28 of the inner frame 23. In the condition that the internal space of the outer frame 22 is closed by the inner frame 23, the outer periphery of the plate portion 29 of the inner frame 23 comes close to the plate portion 25 of the outer frame 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling inspection port.

[0002]

2. Description of the Related Art As shown in FIGS. 6 to 10, a ceiling inspection opening generally known in the art is an aluminum-shaped substantially inverted T-shape which is fitted into an opening 1a of a ceiling plate 1 and fixed to a building side. An engagement piece rotatably engaged with an outer frame 2 and an engagement piece 4 formed on an end surface of one side along an inner peripheral edge of a plate portion 3 projecting inward from a lower end of the outer frame 2. 5 rises and 1 of wall 6
A substantially inverted T-shaped inner frame 7 made of aluminum for opening and closing the inner space of the outer frame 2 provided on the outer side of the side frame, and is mounted on a plate portion 8 at an inner lower end of the inner frame 7 and is made of the same material as the ceiling plate 1. A cover member 9, and the outer frame 2 is provided by the inner frame 7 to which the cover member 9 is attached.
When the internal space is closed, the outer periphery of the plate portion 10 provided so as to protrude outside the lower end of the inner frame 7 is configured to be close to the plate portion 3 protruding inside the lower end of the outer frame 2. I have. Reference numeral 11 denotes a spring attached to the inside of the outer frame 2 for pressing the upper portion of the engaging piece 5 so that the engaging piece 5 does not come off the engaging piece 4.

When the inner frame 7 to which the lid member 9 is attached is opened at the ceiling inspection opening having such a configuration, if the user releases the inner frame 7 during the opening process, the inner frame 7 is moved to the inner frame 7 and the inner frame. 7, the cover member 9, which is placed on the plate portion 8 at the lower end on the inside, rotates vigorously due to the weight of the cover member 9, and as shown in FIG.
The inner frame 7 located on the rotation center side where the engagement portion exists.
The edge of the plate portion 10 projecting outside the lower end of the outer frame 2 strongly contacts the lower surface of the outer frame 2 located on the rotation center side, and the edge of the plate portion 10 projecting outside the lower end of the inner frame 7 and the outer frame 2. There is a problem in that at least one of the lower surfaces of the above is deformed.

[0004]

SUMMARY OF THE INVENTION The present invention solves such a problem. When the inner frame is opened, it protrudes outside the lower end of the inner frame even if the hand is released from the inner frame during the opening process. It is an object of the present invention to prevent the edge of the plate portion from hitting the lower surface of the outer frame and prevent the inner frame and the outer frame from being deformed.

[0005]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a substantially inverted T-shaped outer frame which is fitted into an opening of a ceiling plate and fixed to a building, and an inner portion of the outer frame. A substantially inverted T-shaped inner frame for opening and closing the space, and an engagement piece formed on an end surface of one side along an inner peripheral edge of a plate portion extending inside the lower end of the rising wall of the outer frame. And an engagement piece rotatably engaged with an engagement piece formed on an upper surface along one side of a plate portion extending outside the lower end of the rising wall of the inner frame. An engagement member, and a lid material placed on a plate at an inner lower end of the rising wall of the inner frame, wherein the inner frame rises in a state where the inner space of the outer frame is closed by the inner frame to which the lid material is attached. The outer periphery of the plate portion projecting outside the lower end of the wall projects inside the lower end of the rising wall of the outer frame. Be configured to close to the part in which the gist of the. Also, the present invention provides the above-mentioned aspect, wherein the engaging member is provided on one side outer surface of the rising wall of the inner frame between a state where the inner frame closes the inner space of the outer frame and a state where the inner frame is opened at an angle of about 90 degrees with respect to the outer frame. The gist of the present invention is that it has a plate portion that comes into contact with the plate.

With this configuration, the outer frame and the inner frame are connected via the engaging member so that the inner frame can be freely opened and closed.
When opening the inner frame with the lid attached, even if you release your hand 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 the inner frame and the outer frame Can be prevented from being deformed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 to 5,
In the present embodiment, the ceiling inspection opening is provided by the opening 21 of the ceiling plate 21.
a substantially inverted T-shaped aluminum outer frame 22 fitted to a and fixed to the building side; an aluminum substantially inverted T-shaped inner frame 23 for opening and closing the internal space of the outer frame 22; An engagement piece 27 rotatably engaged with an engagement piece 26 formed on an end face of one side along an inner peripheral edge of a plate portion 25 projecting inside a lower end of a rising wall 24 of the outer frame 22 and the inner portion. An inner frame 23 having an engagement piece 31 rotatably engaged with an engagement piece 30 formed on an upper surface along one side of a plate portion 29 protruding outside a lower end of a rising wall 28 of the frame 23. Is the outer frame 2
2 from the closed state to the outer frame 22 by about 9
A metal or synthetic resin engaging member 33 having a plate portion 32 abutting on the outer surface of one side of the rising wall 28 of the inner frame 23 between a state where the inner frame 23 is opened at an angle of 0 degree; A lid 35 made of the same material as that of the ceiling plate 21 is provided on a plate portion 34 at an inner lower end of the rising wall 28.
When the inner space of the outer frame 22 is closed by the inner frame 23 to which the outer frame 22 is attached, the outer periphery of the plate portion 29 that projects outside the lower end of the rising wall 28 of the inner frame 23 extends inside the lower end of the outer frame 22. It is configured so as to be close to the plate portion 25 to be ejected. Reference numeral 36 denotes one end fixed to the rising wall 24 of the outer frame 22 and the other end locked to the engaging member 33 so that the opening and closing operation of the inner frame 23
3 is a spring for preventing the third engaging piece 27 from coming off the engaging piece 26 of the outer frame 22. By the way, the engagement portion of the engagement piece 31 of the engagement member 33 with the engagement piece 30 of the inner frame 23 is such that the tip of the engagement piece 31 of the engagement member 33 is in the recess of the engagement piece 30 of the inner frame 23. The inner frame 23 is fitted so that it does not come off when the inner frame 23 is opened and closed. Further, reference numeral 37 denotes a plate portion projecting outside the lower end of the rising wall 24 of the outer frame 22.

In the above configuration, when 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 as shown in FIG. 3, and the engagement with the engagement piece 26 of the outer frame 22 is released. . When the locking means is released from this state and the inner frame 23 to which the lid member 35 is attached is rotated downward to open the internal space of the outer frame 22, the inner frame 23 is The engagement member 33 rotates about an engagement portion between the engagement piece 31 and the engagement piece 31, and the engagement member 33 rotates about an engagement portion between the engagement piece 27 and the engagement piece 26 of the outer frame 22. 4 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. When the inner frame 23 comes into contact with the outer surface of one side edge of the inner frame 23 and then tries to rotate further 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 is substantially horizontal, the back surfaces of the plate portions 29 and 34 of the inner frame 23 are brought into contact with 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 35 is attached is opened, even if the user releases his hand from the inner frame 23 during the opening process, the plate portions 29 and 34 of the inner frame 23 may come out. The inner frame 23 and the outer frame 22 can be prevented from being deformed without vigorously rotating until they come into contact with the plate portions 25 and 37 of the frame 22.

[0009]

As described above, according to the present invention, the outer frame and the inner frame are connected via the engaging member so that the inner frame can be opened and closed freely. When opening the frame,
Even if the user releases his / her hand from the inner frame during the opening process, the inner frame does not vigorously rotate until the inner frame 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 a main part of the ceiling inspection port.

FIG. 3 is a cross-sectional view illustrating 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 an inner frame of the ceiling inspection opening is opened at an angle of substantially 90 degrees with respect to an outer frame.

FIG. 5 is a cross-sectional view showing a state in which an inner frame of the ceiling inspection opening is opened at an angle larger than 90 degrees with respect to an 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 an inner frame of the ceiling inspection port is closed.

FIG. 9 is a cross-sectional view showing a state where the inner frame of the ceiling inspection opening is opened at an angle of substantially 90 degrees with respect to the outer frame.

FIG. 10 is a cross-sectional view showing a state where an inner frame of the ceiling inspection opening is opened at an angle larger than 90 degrees with respect to an outer frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Ceiling board 21a Opening 22 Outer frame 23 Inner frame 24 Rise wall 25 Plate part 26 Engagement piece 27 Engagement piece 28 Rise wall 29 Plate part 30 Engagement piece 31 Engagement piece 32 Plate part 33 Engagement member 34 Plate part 35 Lid 36 Spring 37 Plate

Claims (2)

[Claims] 1. A substantially inverted T-shaped outer frame that is fitted into an opening of a ceiling plate and fixed to a building side, a substantially inverted T-shaped inner frame that opens and closes an internal space of the outer frame, An engagement piece rotatably engaged with an engagement piece formed on an end surface of one side along an inner peripheral edge of a plate portion protruding inside a lower end of the rising wall of the outer frame, and an engagement piece rotatably engaged with the rising wall of the inner frame. An engagement member having an engagement piece rotatably engaged with an engagement piece formed on an upper surface along one side of a plate portion extending outside the lower end; and an engagement member having an inner lower end of a rising wall of the inner frame. A lid material placed on the plate portion, the outer periphery of the plate portion projecting outside the lower end of the rising wall of the inner frame in a state where the inner space of the outer frame is closed by the inner frame to which the lid material is attached, It is characterized by being constituted so as to be close to the plate portion projecting inside the lower end of the rising wall of the outer frame. Well inspection port. 2. The outer surface of one of the rising walls of the inner frame, wherein the engagement member is provided between the state in which the inner frame closes the inner space of the outer frame and the state in which the inner frame is opened at an angle of about 90 degrees with respect to the outer frame. 2. The ceiling inspection port according to claim 1, further comprising a plate portion that comes into contact with the ceiling.