JP2011219973A - Ceiling inspection port - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling inspection port with airtightness that is maintained by using a rotation mechanism comprising an shaft part and a bearing.SOLUTION: In a ceiling inspection port comprising an outer frame 10 fixed to a ceiling opening 3 on a ceiling surface 2 and an inner frame 20 rotatably journaled through a rotation member 30 to the outer frame and provided with a lid component 2b inside, the outer frame and the inner frame are provided with horizontal flange parts 12, 12A, 22, 22A at the lower end of a perpendicular strip 11, respectively; flange part of either of the outer frame and the inner frame is provided with a notch; the flange part of the three sides on the opening/closing side of the inner frame is extended within such a range as being superposed upon the bottom face of the flange part of three sides on the opening/closing side of the outer frame; the flange part in one side on the proximal side of the inner frame is extended within such a range as being superimposed upon the top face of the outer frame in the reverse vertical order relative to that for the flanges of the three sides on the opening/closing side; a packing component 40 is fitted on the opposite face of flange part of either of the outer frame and the inner frame in the area where the flange parts are mutually superimposed; and gap filling material 50 filling the gap between the outer frame and the inner frame under the closed condition of the inner frame is disposed at the notch part in the flange part.

Description

  The present invention relates to a ceiling inspection port.

  Conventionally, it is formed so as to be rotatable by a rectangular outer frame that is fitted and fixed in a ceiling opening established on the ceiling surface, and a rotating member interposed between the outer frame and a lid member is provided inside. 2. Description of the Related Art A ceiling inspection opening having a rectangular inner frame is known. In order to add an airtight effect to this ceiling inspection port, there is a method of providing airtight performance by attaching an airtight material to the portion where the inner frame and the outer frame are in contact with each other for the purpose of blocking the inflow of air to the back side of the ceiling and the indoor side. It has been adopted.

  In this case, if the airtight material is an overlapping part of the inner frame and the outer frame, the mounting position may be on the inner frame side or the outer frame side, or the mounting position may be on the edge of the frame close to the room or on the back side of the ceiling. Any of the leading ends of the frame may be used.

  On the other hand, for the purpose of inspecting equipment on the back of the ceiling, various rotating mechanisms for opening and closing the inner frame are employed. However, in order to provide airtight performance, in order to exert airtight performance over the entire periphery of the overlapping portion of the inner frame and the outer frame, in the rotation mechanism composed of the rotation shaft and the bearing, Since the free end side and the base end side rotate in the opposite directions, it cannot be handled.

  Therefore, as a conventional rotation mechanism, a plurality of arms whose one end is rotatably connected to the inner frame, and the other end of each arm are rotatably connected, and the connection The thing of the structure which has the attachment member attached to an outer frame with a state is known (for example, refer patent document 1).

JP 2008-280780 A (Claims, FIGS. 1 and 5)

  However, in the thing of patent document 1, since it has a some arm and axial part, while a number of parts increases and cost increases, a tool and screws are needed when attaching an inner frame, etc. is there.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a ceiling inspection port that can maintain airtightness using a rotating mechanism including a shaft portion and a bearing.

  In order to solve the above-described problems, the present invention provides an intervening space between a rectangular outer frame that is fitted and fixed in a ceiling opening established on a ceiling surface, and two opposite end portions of the outer frame. A ceiling inspection opening comprising a rectangular inner frame that is pivotally supported with respect to the outer frame via a rotating member and is provided with a lid member therein, the outer frame and the inner frame Are provided with a vertical piece and a flange portion extending horizontally at the lower end of the vertical piece, respectively, and the flange portion on the rotating member side of one of the outer frame and the inner frame, Provided with a notch for avoiding interference when the inner frame rotates, the flange on the open / close side consisting of two sides of the inner frame on the rotating member side and one side on the rotating free end side Extend to the area that overlaps the lower surface of the flange on the three sides of the opening and closing side of the outer frame, and the frame on the other proximal side of the inner frame Extending the flange portion upside down on the upper and lower sides of the flange portion on the open / close side, and facing one flange portion in the overlapping portion of the outer frame and the inner frame flange portion. An airtight material is attached to the notch portion in the flange portion, and a gap closing material is provided to close the gap between the outer frame and the inner frame in a state where the inner frame is closed. (Claim 1).

  With this configuration, the outer frame and the inner frame do not interfere with each other by the notch provided in the flange portion on the rotating member side of at least one of the outer frame and the inner frame. And the lid can be opened and closed. Further, in the closed state of the inner frame, the flange portions on the open / close side of the inner frame are overlapped with the lower surface of the flange portion on the open / close side of the outer frame, and the flange portion on one side of the base end side of the inner frame is connected to the open / close side 3 By superimposing on the upper surface of the outer frame in a state that is upside down with respect to the flange portion on the side, airtightness can be provided by the airtight material interposed in the overlapped portion.

  In this invention, the notch is provided in the flange portion on the rotating member side of the inner frame, and the outer flange portion extended to the three open / close side sides of the inner frame is connected to the open / close side three sides of the outer frame. The outer flange portion is formed so as to overlap the lower surface of the outer flange portion that extends to the outer frame, and the outer flange portion that extends to the one end side of the inner frame extends to the one end side of the outer frame. It can be set as the structure formed so that it may overlap with the upper surface of an inner flange part (Claim 2).

  With this configuration, in the closed state of the inner frame, the outer flanges on the three sides of the inner frame are overlapped with the lower surfaces of the flanges on the three sides of the outer frame, and the proximal side of the inner frame By superimposing the outer flange portion on one side on the upper surface of the inner flange portion on one side of the base end side of the outer frame, airtightness can be provided by an airtight material interposed in the overlapping portion.

  In the present invention, the notch is provided in the flange portion on the rotating member side of the outer frame, and the outer flange portion extended on the three sides of the inner frame on the opening / closing side of the outer frame is connected to the opening / closing side of the outer frame. It is formed so as to overlap the lower surface of the inner flange portion extending on the three sides, and the outer flange portion extending on one side of the base end side of the inner frame is extended to one side of the base end side of the outer frame. It can be set as the structure formed so that it may overlap with the upper surface of the inner flange part made | formed (Claim 3).

  With this configuration, in the closed state of the inner frame, the outer flange portions on the three sides of the inner frame are overlapped with the lower surfaces of the inner flange portions on the three sides of the outer frame. By superposing the outer flange portion on one side of the base end side on the upper surface of the inner flange portion on one side of the base end side of the outer frame, airtightness can be provided by an airtight material interposed in the overlapping portion. In addition, since the outer flange on the three sides of the inner frame on the open / close side of the inner frame is superimposed on the lower surface of the inner flange on the three sides of the outer frame, the inner frame can be made smaller. The frame material can be reduced.

  Further, in the ceiling inspection port according to claim 2, a flange portion extending on the open / close side three sides of the outer frame is provided on an upper surface of the outer flange portion extending on the open / close side three sides of the inner frame. An outer stepped portion that can be accommodated is formed, and a flange portion that extends to one side of the inner frame can be accommodated on the upper surface of the inner flange that extends to one side of the outer frame. It is preferable to form a long inner step (claim 4).

  With this configuration, in the closed state of the inner frame, the lower surface of the flange portion on the open / close side of the inner frame and the lower surface of the flange portion on the base end side of the outer frame can be positioned on the same plane. , Can improve aesthetics.

  Further, in the ceiling inspection port according to claim 3, the outer flange extending on the three open / close side sides of the inner frame is provided on the lower surface of the inner flange portion extending on the open / close side three sides of the outer frame. An inner flange extending to one side of the outer frame is formed on the lower surface of the outer flange extending to one side of the inner frame. It is preferable to form an outer step portion that can accommodate the portion (claim 5).

  By configuring in this manner, the lower surface of the flange portion on the open / close side of the inner frame and one side of the base end side and the lower surface of the flange portion of the open / close side of the outer frame and the base end side are positioned on the same plane. It is possible to improve the aesthetic appearance.

  According to this invention, since it is configured as described above, the following excellent effects can be obtained.

  Ceiling inspection that can be easily processed and can be kept airtight by using a general rotation mechanism consisting of a shaft part and bearings with few components, and that facilitates installation and reduces costs. Can provide a mouth.

It is a perspective view which shows the closed state of 1st Embodiment of the ceiling inspection opening which concerns on this invention. It is a perspective view which shows the open state of the ceiling inspection port of the said 1st Embodiment. It is sectional drawing which shows the closed state of the ceiling inspection port of the said 1st Embodiment. It is sectional drawing which follows the II line | wire of FIG. It is a disassembled perspective view which shows the principal part of the outer frame and inner frame in 1st Embodiment. It is a perspective view which shows the closed state of 2nd Embodiment of the ceiling inspection opening which concerns on this invention. It is a perspective view which shows the open state of the ceiling inspection port of the said 2nd Embodiment. It is a downward perspective view which shows the closed state of the ceiling inspection port of the said 2nd Embodiment. It is sectional drawing which shows the closed state of the ceiling inspection port of the said 2nd Embodiment. It is sectional drawing which shows the open state of the ceiling inspection opening of the said 2nd Embodiment. It is an expanded sectional view of the II section of FIG. It is an expanded sectional view of the III section of FIG. It is a perspective view which shows the bearing part in the ceiling inspection opening of 2nd Embodiment. It is a perspective view which shows the axial part and clearance gap closing material in the ceiling inspection opening of 2nd Embodiment. It is a perspective view which shows the locking part in this invention.

  Hereinafter, embodiments of a ceiling inspection port according to the present invention will be described in detail with reference to the accompanying drawings. Here, the case where a ceiling inspection opening is attached to the ceiling surface of a general house is demonstrated.

<First Embodiment>
As shown in FIGS. 1 to 4, the ceiling inspection port 1 </ b> A includes a rectangular outer frame 10 fitted and fixed in a rectangular ceiling opening 3 established on the ceiling surface 2, and two opposing outer frames 10. With a rectangular inner frame 20 that is pivotally supported with respect to the outer frame 10 via a rotating member 30 interposed between the side edge and the lid member 2b. It is mainly composed. Further, in the outer frame 10 and the inner frame 20, a band-shaped packing member 40 that is an airtight material is interposed in a portion where the inner frame 20 is overlapped in a closed state, so that the airtight performance is maintained.

  The outer frame 10 is formed of an extruded aluminum member having a reverse T-shaped cross section provided with a vertical piece 11 and an outer frame flange portion 12 extending horizontally at the lower end of the vertical piece 11. The first outer frame member 13 on three sides and the second outer frame member 14 on one side are formed in a square shape. In this case, both end portions of the first outer frame member 13 and the second outer frame member 14 are cut at 45 degrees, and the adjacent outer frame members 13 and 14 are not shown in the form of an angle-shaped fixing bracket and fixing screws, etc. Is formed into a square shape by abutting and joining. That is, the outer frame 10 forms a first outer frame member 13 that forms three sides of the opening / closing side, which includes two sides on the rotating member side and one side on the rotating free end side, and the remaining one side on the base end side. The second outer frame member 14 is formed in a square shape.

  The outer frame flange portion 12 extended to the lower end portion of the vertical piece 11 of the first outer frame member 13 includes an inner flange portion 12a extending inward of the rectangular outer frame 10 and an outer side. And an outer flange portion 12b extending in the direction. Further, the outer frame flange portion 12A extending to the lower end portion of the vertical piece 11 of the second outer frame member 14 includes an inner flange portion 12c extending inward of the rectangular outer frame 10 and an outer portion. The outer flange portion 12d extending to the first outer frame member 13 has a wall thickness approximately twice as thick as the outer frame flange portion 12 extending to the first outer frame member 13. Yes. An inner step portion 15 that can accommodate an inner frame flange portion 22A that extends to the inner frame 20 described later is formed on the upper surface of the inner flange portion 12c of the second outer frame member 14. A belt-like packing member 40 that is an airtight material is attached to the upper surface of the inner step portion 15.

  The outer frame 10 formed as described above is fixed to the ceiling side by being screwed to a field edge 5 constituting the ceiling by a fixing screw 4 penetrating the vertical piece 11.

  On the other hand, the inner frame 20 is formed of an aluminum extruded profile having a reverse T-shaped cross section provided with a vertical piece 21 and an inner frame flange portion 22 extending horizontally at the lower end of the vertical piece 21. The first inner frame member 23 with three sides and the second inner frame member 24 with one side are formed in a square shape. In this case, both end portions of the first inner frame member 23 and the second inner frame member 24 are cut at 45 degrees, and the adjacent inner frame members 23 and 24 are not shown in the form of an angle-shaped fixing bracket and a fixing screw. Is formed into a square shape by abutting and joining. That is, the inner frame 20 forms the first inner frame member 23 that forms three sides of the opening and closing side, which includes two sides on the rotating member side and one side on the rotating free end side, and the remaining one side on the base end side. The second inner frame member 24 is formed in a square shape.

  Further, the inner frame flange portion 22 extended to the lower end portion of the vertical piece 21 of the first inner frame member 23 includes an inner flange portion 22a extending inward of the rectangular inner frame 20 and an outer side. And an outer flange portion 22b extending in the direction. Further, the inner frame flange portion 22A extending to the lower end portion of the vertical piece 21 of the second inner frame member 24 includes an inner flange portion 22c extending inward of the rectangular inner frame 20 and an outer portion. And an outer flange portion 22d extending in the direction. The thickness of the inner frame flange portion 22 of the first inner frame member 23 is approximately twice as thick as the inner frame flange portion 22 </ b> A of the second inner frame member 24. An outer step portion 25 capable of accommodating the outer frame flange portion 12 extending to the first outer frame member 13 is formed on the upper surface of the outer flange portion 22b of the first inner frame member 23. Yes. A band-shaped packing member 40 that is an airtight material is mounted on the upper surface of the outer step portion 25.

  In the inner frame 20 formed as described above, the end of the outer flange portion 22b on the rotating member side of the first inner frame member 23 is for avoiding interference when the inner frame 20 rotates. A notch 60 is provided. The notch portion includes a first gap closing member 51 made of a hollow packing member attached to the upper surface of the inner flange portion 12a of the first outer frame member 13, and a first inner frame member of the inner frame 20. Since the second gap closing material 52 made of a hollow packing member attached to the upper surface of the notch 60 of the outer flange portion 22b of the 23 is in close contact, the gap of the notch 60 portion is closed (see FIG. 4).

  As shown in FIGS. 4 and 5, the rotating member 30 protrudes from the outer surface of the vertical piece 21 on the end side of the first inner frame member 23 that forms two opposite sides of the inner frame 20. An upper end that is attached to the inner surface of the vertical piece 11 on the end portion side of the first outer frame member 13 that forms two opposite sides of the shaft portion 31 and the outer frame 10 and that rotatably supports the shaft portion 31. It is comprised with the substantially U-shaped synthetic resin bearing 32 opened.

  In order to install the ceiling inspection port of the first embodiment configured as described above on the ceiling surface 2, first, a rectangular ceiling opening 3 is opened in the ceiling plate 2 a forming the ceiling surface 2. In the factory, the outer frame 10 and the inner frame 20 are formed by previously framing the outer frame members 13 and 14 and the inner frame members 23 and 24 respectively formed of two types of extruded aluminum members. In addition, the inner frame 20 is fixed inside as a lid member 2b formed by appropriately adjusting a plate material that substantially matches the size of the ceiling opening 3 cut out when the ceiling opening 3 is opened. The lid member 2b is fixed with the vertical piece 21 of the inner frame 20 in a state where the lid member 2b is placed on the inner flange portions 22a and 22c of the inner frame flange portions 22 and 22A extending to the inner frame 20. An angle-shaped presser fitting 6 that contacts the upper surface of the end of the lid member 2b is fixed by screwing (see FIG. 4).

  The ceiling inspection port 1 </ b> A is attached to the ceiling opening 3 with the fixing screw 4 penetrating the vertical piece 11 of the outer frame 10 in a state where the outer frame 10 is inserted into the periphery of the opening of the ceiling opening 3. The outer frame 10 is fixed by screwing to 5. After fixing the outer frame 10, the inner frame 20 is inserted into the outer frame 10 from the portion of the notch 60, and the shaft portion 31 protruding from the vertical piece 21 of the inner frame 20 is used as the vertical piece 11 of the outer frame 10. The inner frame 20 is attached to the outer frame 10 so that it can be opened and closed.

  According to the ceiling inspection opening 1 </ b> A of the first embodiment configured as described above, in the closed state of the inner frame 20, the outside extended to the first inner frame member 23 on the three sides of the opening / closing side of the inner frame 20. The side flange portion 22b is overlapped with the lower surface of the outer frame flange portion 12 extending from the first outer frame member 13 on the three sides of the opening and closing side of the outer frame 10, and the second inner side on the proximal side of the inner frame 20 By overlapping the inner frame flange portion 22 </ b> A extending to the frame member 24 on the upper surface of the inner flange portion 12 c extending to the second outer frame member 14, the packing member 40 interposed in the overlapping portion can Airtightness can be given. In this case, an outer step portion 25 that can accommodate the outer frame flange portion 12 of the first outer frame member 13 is formed on the upper surface of the outer flange portion 22b of the first inner frame member 23, and the second step. On the upper surface of the inner flange portion 12c of the outer frame member 14, an inner step portion 15 that can accommodate the inner frame flange portion 22A extended to the second inner frame member 24 is formed. In the closed state of the frame 20, the lower surface of the inner frame flange portion 22 on the open / close side of the inner frame 20 and the lower surface of the outer frame flange portion 12A on the base end side of the outer frame 10 can be positioned on the same plane. , Can improve aesthetics.

Second Embodiment
Next, a second embodiment of the ceiling inspection port according to the present invention will be described with reference to FIGS. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals.

  The ceiling inspection port 1 </ b> B of the second embodiment has an outer flange portion 22 b extending on the first inner frame member 23 on the three sides of the opening / closing side of the inner frame 20, and the first on the three sides of the opening / closing side of the outer frame 10. The outer flange portion 22d is formed so as to overlap the lower surface of the inner flange portion 12a extending to the outer frame member 13 and extends to the second inner frame member 24 on one side of the proximal end side of the inner frame 20. Is formed so as to overlap the upper surface of the inner flange portion 12c extending to the second outer frame member 14 on one side of the base end side of the outer frame 10.

  In this case, an inner step portion 16 bent upward is formed on the lower surface side of the inner flange portion 12a extending to the first outer frame member 13 on the three sides of the opening and closing side of the outer frame 10. An outer flange portion 22b extending from the first inner frame member 23 of the inner frame 20 can be accommodated in the inner step portion 16 (see FIG. 11). A packing member 40 is mounted on the upper surface of the outer flange portion 22b extending from the first inner frame member 23 accommodated in the inner step portion 16, so that the outer frame 10 and the inner frame 20 overlap each other. Airtightness is maintained.

  Further, an outer step portion 26 that is bent upward is formed on the lower surface side of the outer flange portion 22d that extends to the second inner frame member 24 on one side of the proximal end side of the inner frame 20, and this outer step portion 26 is formed on the outer side. An inner flange portion 12c extending to the second outer frame member 14 of the outer frame 10 can be accommodated in the stepped portion 26 (see FIG. 12). A packing member 40 is attached to the lower surface of the outer step portion 26, and the airtightness of the overlapping portion of the outer frame 10 and the inner frame 20 is maintained.

  In addition, as shown in FIG. 11, the 1st outer frame material 13 which forms the outer frame 10 in 2nd Embodiment expands an inner side in the intermediate part of the vertical piece 11, and protrudes to the outer side. A tapered concave portion 17 is provided, and is formed of an aluminum extruded profile in which the inner step portion 16 is provided on the inner flange portion 12a of the outer frame flange portion 12 extending to the lower end portion of the vertical piece 11. ing. Further, as shown in FIG. 12, the second outer frame member 14 is provided with a taper-shaped concave portion 17 having an inwardly expanding opening and projecting outwardly in an intermediate portion of the vertical piece 11. 11 is formed of an aluminum extruded profile in which an outer frame flange portion 12A is extended to the lower end portion. In this case, both end portions of the first outer frame member 13 and the second outer frame member 14 are cut by 45 degrees, and the adjacent outer frame members 13 and 14 are contacted and joined by the angle-shaped fixing bracket 80, By performing caulking, it is formed into a square shape (see FIGS. 6 and 7).

  The plate-like shape of the fixing screw 4 that passes through the through-hole 17a drilled at an appropriate position of the concave portion 17 of the first and second outer frame members 13 and 14 formed in this way and is screwed to the field edge 5. The head 4a is accommodated in the recess 17 (see FIGS. 11 and 12). A band-shaped packing member 40 is mounted on the upper surface of the outer flange portions 12b and 12d of the outer frame flange portions 12 and 12A of the first and second outer frame members 13 and 14, and is connected to the ceiling plate 2a. Airtightness is maintained between them.

  Further, the first inner frame member 23 forming the inner frame 20 in the second embodiment is an aluminum extruded shape member in which an inner frame flange portion 22 is extended to the lower end portion of the vertical piece 21, as shown in FIG. It is formed by. Further, as shown in FIG. 12, the second inner frame member 24 is provided with the outer step portion 26 on the outer flange portion 22d of the inner frame flange portion 22A extending to the lower end portion of the vertical piece 21. It is formed of an aluminum extruded profile. In this case, both end portions of the first inner frame member 23 and the second inner frame member 24 are cut by 45 degrees, and the adjacent inner frame members 23 and 24 are contacted and joined by the angle-shaped fixing bracket 80, By performing caulking, it is formed into a square shape (see FIGS. 6 and 7).

  Further, as shown in FIGS. 13 and 14, the rotating member 30 </ b> A in the second embodiment has an angle shape that is attached to the outer surface of the corner portion of the first inner frame member 23 and the second inner frame member 24. On the surface of the fixed base 35 that is mounted on the inner surface of the first outer frame member 13 and the shaft portion 31A that is formed in a portion in which one piece 34 of the metal plate 33 protrudes in a step shape by pressing. It is comprised with the bearing 32A made from a synthetic resin which protruded the bearing cylinder part 36 which upper side opened.

  Further, in the second embodiment, the notch 60 for avoiding interference when the inner frame 20 rotates is a rotating member of the inward flange portion 12 a extending to the first outer frame member 13. It is provided at the end on the 30 side. In order to close the gap between the notch 60 and the outer frame 10 and the inner frame 20, a gap closing material 40A made of a soft synthetic resin is provided with an outer flange portion 22b extending from the first inner frame material 23, 2 is mounted on the upper surface side of the inner frame member 24 with the outer flange portion 22d (see FIG. 14).

  In the second embodiment, a lock 70 is provided to ensure the closed state of the inner frame 20. In this case, as shown in FIGS. 11 and 15, the lock 70 stands above the outer flange portion 22 b that is extended to the rotation free end portion of the first inner frame member 23 that forms the inner frame 20. A bearing member 71 is provided, an operation shaft 72 that is rotatably inserted into the bearing member 71, and a lock piece 73 that protrudes perpendicularly to the operation shaft 72. The operation shaft 72 is exposed on the lower surface of the outer flange portion 22b, and the operation shaft 72 can be turned by engaging a tool such as a screwdriver with a groove 74 formed on the lower end surface. Yes. Thus, with the inner frame 20 and the lid 2b closed, a tool such as a screwdriver is engaged with the concave groove 74 on the lower end surface of the operation shaft 72, the operation shaft 72 is rotated, and the operation shaft 72 is rotated. By locking the locking piece 73 that rotates in the horizontal direction with the movement to the upper surface of the inner flange portion 12a of the first outer frame member 13, the closed state of the inner frame 20 and the lid member 2b is ensured. be able to.

  According to the ceiling inspection port 1B of the second embodiment configured as described above, in the closed state of the inner frame 20, the outside extended to the first inner frame member 23 on the open / close side of the inner frame 20 The side flange portion 22b is superposed on the lower surface of the inner flange portion 12a extending on the first outer frame member 13 on the three sides of the opening and closing side of the outer frame 10, and the second side on the one side of the base end side of the inner frame 20 is overlapped. By superimposing the outer flange portion 22d extending to the inner frame member 24 on the upper surface of the inner flange portion 12c extending to the second outer frame member 14 on one side of the base end side of the outer frame 10, Airtightness can be provided by the packing member 40 interposed in the overlapping portion. In addition, the outer flange portion 22 b extending to the first inner frame member 23 on the three sides of the inner frame 20 on the opening / closing side is extended to the first outer frame member 13 on the three sides of the opening / closing side of the outer frame 10. Since the inner frame flange portion 22 of the inner frame 20 can be made smaller by overlapping the lower surface of the inner flange portion 12a, the material of the inner frame 20 can be reduced.

  In addition, in 2nd Embodiment, since the attachment to the ceiling surface 2 of the ceiling inspection opening 1B and the structure of another part are the same as 1st Embodiment, description is abbreviate | omitted.

<Other embodiments>
In the above embodiment, the case where the outer frame 10 is fixed to the field edge 5 of the ceiling base material with the fixing screw 4 has been described. However, the outer frame 10 is fixed to the field edge 5 using a mounting bracket. Also good.

  Moreover, you may replace the rotation member 30 in the ceiling inspection port 1A of 1st Embodiment with the rotation member 30A similar to 2nd Embodiment. Furthermore, the locking 70 may be attached to the ceiling inspection port 1A of the first embodiment as in the second embodiment.

1A, 1B Ceiling inspection port 2 Ceiling surface 2a Ceiling plate 2b Lid 3 Ceiling opening 10 Outer frame 11 Vertical piece 12, 12A Outer frame flange 12a Inner flange 12b Outer flange 13 First outer frame 14 2 outer frame members 15, 16 inner step portion 20 inner frame 21 vertical pieces 22, 22A inner frame flange portion 22a inner flange portion 22b outer flange portion 22c inner flange portion 22d outer flange portion 23 first inner Frame member 24 Second inner frame member 25, 26 Outer step portion 30, 30A Rotating member 40 Packing member (airtight member)
50, 50A gap closing material 60 notch

Claims (5)

It is attached to the outer frame via a rotating member that is interposed between the rectangular outer frame that is fitted and fixed in the ceiling opening established on the ceiling surface and the two edge portions on the opposite side of the outer frame. A ceiling inspection opening provided with a rectangular inner frame that is pivotally supported with respect to the inside and is provided with a lid.
The outer frame and the inner frame are each provided with a vertical piece and a flange portion extending horizontally at the lower end of the vertical piece,
A notch for avoiding interference when the inner frame rotates is provided in the flange portion on the rotating member side of one of the outer frame and the inner frame,
The flange portion of the open / close side consisting of the two sides of the inner frame on the rotating member side and the one side of the free rotation end is extended to a range where it overlaps the lower surface of the flange portion on the open / close side of the outer frame. And extending the flange portion on one side of the remaining base end side of the inner frame in a range that overlaps the upper surface of the outer frame in an upside down manner with the flange portion on the three sides of the opening and closing side,
Attach an airtight material to the opposing surface of one flange part in the overlapping part of the flange part of the outer frame and the inner frame,
The notch portion in the flange portion is provided with a gap closing material that closes the gap between the outer frame and the inner frame in a state where the inner frame is closed.
Ceiling inspection opening characterized by that. In the ceiling inspection port according to claim 1,
The notch is provided in the flange portion on the rotating member side of the inner frame,
Forming the outer flange portion extending on the three open / close side sides of the inner frame so as to overlap the lower surface of the outer flange portion extending on the open / close side three sides of the outer frame;
An outer flange portion extending on one side of the base end side of the inner frame is formed so as to overlap with an upper surface of the inner flange portion extending on one side of the base end side of the outer frame.
Ceiling inspection opening characterized by that. In the ceiling inspection port according to claim 1,
The notch is provided in the flange portion on the rotating member side of the outer frame,
An outer flange portion extending on the three open / close side sides of the inner frame is formed so as to overlap the lower surface of the inner flange portion extending on the three open / close side sides of the outer frame,
An outer flange portion extending on one side of the base end side of the inner frame is formed so as to overlap with an upper surface of the inner flange portion extending on one side of the base end side of the outer frame.
Ceiling inspection opening characterized by that. In the ceiling inspection port according to claim 2,
On the upper surface of the outer flange portion extending on the open / close side three sides of the inner frame, an outer step portion capable of accommodating the flange portion extending on the open / close side three sides of the outer frame is formed,
On the upper surface of the inner flange portion that extends to one side of the outer frame, an inner step portion that can accommodate the flange portion that extends to one side of the inner frame is formed.
Ceiling inspection opening characterized by that. In the ceiling inspection port according to claim 3,
On the lower surface of the inner flange portion extending on the three open / close side sides of the outer frame, an inner step portion that can accommodate the outer flange portion extending on the three open / close side sides of the inner frame is formed,
On the lower surface of the outer flange portion extending to one side of the base frame on the inner frame, an outer step portion that can accommodate the inner flange portion extending to one side of the outer frame of the outer frame is formed. Become,
Ceiling inspection opening characterized by that.

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