JPH09242318A - Mounting structure of ceiling inspection hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to change properly the pivot position of an inner frame for an outer frame to comply with the layout position of furniture inside a room. SOLUTION: An engagement piece 5 is provided on an inside plate 4 on the lower end of a cross section-inversely T-shaped outer frame 1 provided in the form of a square when viewed from below where the engagement piece 5 is designed to support turnably an inner frame 6 on each of four sides alone the inner periphery. The inner frame 6 is also square-shaped when viewed from below and its cross section is practically inversely T-shaped. An engagement piece 10, which is turnably engaged with either one side of four sides of the outer frame 1 in one side out of the four sides, is integrally provided on an outside plate 9 on the lower bottom of this inner frame 6, thereby constituting the inner frame 6 openably on the square-shaped opening surrounded with the outer frame 1.

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 mounting portion structure characterized by mounting an inner frame to an outer frame of the ceiling inspection port.

[0002]

2. Description of the Related Art Conventionally generally known ceiling inspection ports are made of the same material as a ceiling finishing material provided on the outer side of an outer frame by mounting an inner frame rotatably around a horizontal axis. The ceiling finishing material is placed and fixed on the inner frame. More specifically, the inner frame is pivotally connected to the outer frame via a horizontal axis.

[0003]

However, in the above-mentioned conventional ceiling inspection port, since the inner frame is pivotally connected to the outer frame via a horizontal shaft, the pivotal position of the inner frame to the outer frame is determined. For example, when furniture with a high height is placed below the ceiling inspection port, the tip of the inner frame hits the upper end of the furniture when trying to open the inner frame, and the inner frame cannot be opened or closed. There was a problem.

The present invention is intended to solve such a problem, and an object thereof is to make it possible to appropriately change the pivoting position of the inner frame with respect to the outer frame in accordance with the arrangement state of furniture inside the room. .

[0005]

In order to solve this problem, the present invention provides a plate portion inside a lower end of an outer frame which is provided in a square shape when viewed from below and whose cross-sectional shape is formed into a substantially inverted T shape. Is provided with engaging pieces for rotatably supporting the inner frame along the inner circumference on each of the four sides, and the inner frame also has a square shape when viewed from below, and the cross-sectional shape is formed into a substantially inverted T shape. On the outer plate portion at the lower end of the inner frame, one of the four sides has four sides of the outer frame.
An engaging piece that rotatably engages with the engaging piece on any one of the two sides from the upper side is integrally provided, and the inner frame can be freely opened and closed in a square opening surrounded by the outer frame. The main point is to configure.

With this structure, the inner plate portion at the lower end of the outer frame is engaged with the four sides of the inner frame by engaging the inner frame engaging pieces so as to rotatably support the inner frame. Since the pieces are provided, the inner frame can be engaged with the engaging pieces on any of the four sides of the outer frame, that is, the center of rotation of the inner frame can be freely selected. Therefore, the pivotal position of the inner frame with respect to the outer frame can be appropriately changed according to the arrangement state of furniture inside the room.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. First, the first embodiment shown in FIGS. 1 to 4 will be described. Reference numeral 1 denotes an outer frame suspended from a building by a hanger (not shown), which is provided in a square shape when viewed from below. The cross section of the outer frame 1 is formed in a substantially inverted T shape, and a ceiling finishing material 3 is mounted on a plate portion 2 on the outer side of the lower end. Further, on the inner plate portion 4 at the lower end of the outer frame 1, engagement pieces 5 for rotatably supporting the inner frame described later are integrally provided on each of the four sides along the inner circumference in an upward direction. Reference numeral 6 denotes an inner frame which is openably and closably provided in a square opening surrounded by the outer frame 1. The inner frame 6 has a square shape when viewed from below and has a substantially inverted T-shaped cross section. A ceiling finishing material 8 similar to the ceiling finishing material 3 is mounted on the plate portion 7 inside the lower end of the inner frame 6, and is provided on the plate portion 9 outside the lower end of the inner frame 6. Is integrally provided on one of the four sides with an engaging piece 10 that is rotatably engaged with the engaging piece 5 on any one of the four sides of the outer frame 1 from above. . More specifically, the plate portion 4 inside the lower end of the outer frame 1
A projecting portion 12 having a low height is integrally provided at a position between the engaging piece 5 provided along the inner circumference and a plate portion 11 standing upward, and the closed inner frame 6 is formed. The tip of the engaging piece 10 comes into contact with the projection 12 to position the inner frame 6. Further, the lower end of the engagement piece 5 has a step portion 13 with which the tip of the outer plate portion 9 of the closed inner frame 6 abuts from below.
Are formed.

In the figure, 14 is provided on the inner surface of a plate portion 15 standing above the inner frame 6 for mounting and fixing the ceiling finishing material 8 on the plate portion 7 inside the lower end of the inner frame 6. Holding member,
Reference numeral 16 denotes a lock member provided at an upper end of a plate portion 15 standing upward on a side opposite to one side where the engaging piece 10 of the inner frame 6 is provided. The lock member 16 is a lower end of the inner frame 6. By rotating the operating screw 17 exposing the head 17a to the upper end, the tip end is disengaged from the upper end of the plate portion 11 in a locked state where the tip end is placed on the upper end of the plate portion 11 standing upright above the outer frame 1 and engaged. It is designed to rotate between states. Reference numeral 18 denotes a fall-prevention claw provided so as to make a notch in the plate portion 11 standing upright on each of the four sides of the outer frame 1 and raise that portion inwardly of the plate portion 11, and engages with the inner frame 6. Only the fall prevention claws 18 of the plate portion 11 located outside the engagement piece 5 on any one side with which the piece 10 is engaged are raised inward, and the procedure shown in FIGS. When the inner frame 6 tries to float upward due to vibration or the like in a state where the inner frame 6 is opened, the tip of the engaging piece 10 of the inner frame 6 hits the lower end of the drop-prevention claw 18, and the inner frame 6 is removed. It is possible to prevent the frame 1 from falling off.

In the above structure, the engaging portion 10 of the inner frame 6 is provided along the inner periphery of each of the four sides of the plate portion 4 inside the lower end of the outer frame 1.
Is provided to rotatably support the inner frame 6 so that the inner frame 6 can be attached to any one of the four sides of the outer frame 1. They can be engaged, that is, the center of rotation of the inner frame 6 can be freely selected. Therefore, the pivotal position of the inner frame 6 with respect to the outer frame 1 can be appropriately changed according to the arrangement state of furniture inside the room.

Next, the second embodiment shown in FIGS. 5 and 6 will be described. The outer plate portion 2 at the lower end of the outer frame 1 on which the ceiling finishing material 3 is placed and the plate portion 11 standing upright. The inner frame 6 on which the airtight material 19 is attached so that the lower surface of the ceiling finishing material 3 comes into close contact with the ceiling finishing material 8 between them.
An airtight material so that the lower surface of the ceiling finishing material 8 may come into close contact with the plate portion 7 inside the lower end of the and the plate portion 15 standing upright.
20 is attached, and further the airtight member 21 is attached so that the tip of the outer plate portion 9 of the inner frame 6 closed below the engaging piece 5 of the outer frame 1 comes into contact with the lower side in a closely contacting state. The airtightness between the outer frame 1 and the ceiling finishing material 3 and between the inner frame 6 and the ceiling finishing material 8 is maintained, and the inner frame 6 and the outer frame 1 are closed. It is configured to maintain airtightness between them.

[0011]

As described above, according to the present invention, the inner frame is formed by engaging the engaging pieces of the inner frame with the four inner sides of the plate portion at the lower end of the outer frame along the inner circumference. Since the engaging piece that rotatably supports is provided, the inner frame can be engaged with the engaging piece on any of the four sides of the outer frame, that is, the turning of the inner frame. The center can be freely selected, and the pivot position of the inner frame with respect to the outer frame can be appropriately changed according to the arrangement state of furniture inside the room.

[Brief description of drawings]

FIG. 1 is a sectional view of an outer frame showing a state before mounting an inner frame according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which an inner frame is attached inside the outer frame.

FIG. 3 is a plan view showing a state in which an inner frame is attached inside the outer frame.

FIG. 4A to FIG. 4D are enlarged cross-sectional views of main parts showing a state where the inner frame opens downward.

FIG. 5 is an enlarged cross-sectional view of a main part in the second embodiment of the present invention.

FIG. 6 is an enlarged sectional view of an essential part showing a state in which the inner frame is opened downward.

[Explanation of symbols]

 1 Outer frame 2 Plate part 3 Ceiling finish material 4 Plate part 5 Engaging piece 6 Inner frame 7 Plate part 8 Ceiling finishing material 9 Plate part 10 Engaging piece 11 Plate part 12 Projection part 13 Step part 15 Plate part 18 Fall prevention claw 19, 20, 21 Airtight material

Claims (1)

[Claims] 1. A plate portion inside a lower end of an outer frame, which is provided in a square shape when viewed from below and has a substantially inverted T-shaped cross section, has an inner frame which is provided along each of four sides with an inner circumference. An movably supporting engagement piece is provided, the inner frame also has a square shape when viewed from below, and the cross-sectional shape is formed into an almost inverted T shape. Four edges are provided on the outer plate portion at the lower end of the inner frame. A square surrounded by the outer frame, wherein one side of the outer frame is integrally provided with an engaging piece that is rotatably engaged from above with an engaging piece on any one of the four sides of the outer frame. The structure for mounting the ceiling inspection port is characterized in that the inner frame is configured to be openable and closable in the opening of the.