JP3240905U - Ceiling inspection door - Google Patents

Abstract

An object of the present invention is to provide a ceiling inspection opening that enables a single worker to safely and quickly inspect the ceiling. A ceiling inspection opening (10) provided in a through hole drilled in the ceiling of a building, the body frame (11) fixed to the periphery of the through hole, and the body frame (11) fixed to the ceiling. and a rotating lid portion 13 that rotates toward the rear side of the ceiling so as to open and close the central opening portion 12 of the body frame portion 11 . The fixed portion 15 is provided with a projecting portion 16 for preventing the body frame portion 11 from falling downward. A stopper portion 13s is formed near the outer side of the rotating portion 13k of the rotating lid portion 13 so that the opening angle of the rotating lid portion 13 becomes an acute angle when the rotating lid portion 13 is fully opened. When the force in the opening direction is removed from the portion 13, the pivotable lid portion 13 can close the central opening portion 12 by its own weight. [Selection drawing] Fig. 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection door for easily introducing imaging equipment such as a CCD camera into the ceiling space of a building for inspection and monitoring of the ceiling space.

An example of a conventional inspection door is shown in FIG. 4 attached herewith.
FIG. 4 is an explanatory view of a conventional ceiling inspection door, showing a state in which the opening/closing cover is opened.

As can be seen from this figure, the conventional ceiling inspection door has a substantially quadrilateral hole 41 provided in the ceiling 40, and a substantially quadrilateral opening/closing lid 45 provided in the hole 41 so as to be freely opened and closed. is.
One side 45h of the opening/closing lid portion 45 is rotatably pivoted to one side of the hole portion 41, and a lock portion 45k is provided at the center of the opposing side portion 45f facing the pivoted one side 45h. , the opening/closing lid portion 45 is locked to the facing side portion 41f of the hole portion 41 of the ceiling portion 40, and the opening/closing lid portion 45 closes the hole portion 41 of the ceiling portion 40 and is fixed.

The structure of the pivotally attached portion of the above-described conventional attic inspection door may be pivoted or hinged, as long as it is rotatably formed on one side 45h of the hole portion 41 .
On the other hand, there are various configurations of locking means provided on the opposing side portion facing the pivot portion. However, any other conventional locking or securing means may be used.

In the above-mentioned conventional attic inspection door, when inspecting the attic of a building, the opening and closing lid of the inspection door is opened and closed by climbing a stepladder. After that, it was necessary to take images of the ceiling space with various cameras.

In the present invention, we propose a system specialized for inspection work in the ceiling using a camera. there is

In order to solve the above problems, the first aspect of the present invention is a ceiling inspection opening provided in a through hole drilled in the ceiling of a building, wherein the main body frame is fixed to the periphery of the through hole. a plurality of fixing portions for fixing the body frame to the ceiling; The fixed portion is provided with a protrusion for preventing the body frame portion from falling downward, and the rotating lid portion is provided near the outer side of the rotating portion with the rotating lid portion fully open. A stopper portion is formed so that the opening angle of the rotatable lid portion becomes an acute angle, so that when the force directed to the opening direction of the rotatable lid portion is removed, the rotatable lid portion moves toward the central opening portion due to its own weight. It is an attic inspection door characterized by closing the

A second aspect of the present invention is the ceiling inspection door according to the first aspect, characterized in that a weight member is provided at a portion of the rotating lid portion opposite to the rotating portion.

According to a third aspect of the present invention, in the first or second aspect, the fixing portion comprises a columnar member extending upward from the back side of the body frame portion, and the protrusion is provided on the outside of the columnar member. The ceiling inspection door is characterized in that the protrusion is provided so as to be movable up and down.

According to a fourth aspect of the present invention, in the first or second aspect, the through hole formed in the ceiling portion has a substantially circular shape, and similarly the body frame portion has a substantially circular shape, 3. The ceiling inspection opening according to claim 1, wherein the rotating lid also has a substantially circular shape.

According to a fifth aspect of the present invention, in the third aspect, the through hole formed in the ceiling portion has a substantially circular shape, the body frame portion has a substantially circular shape as well, and The ceiling inspection door is characterized in that the movable cover also has a substantially circular shape.

A sixth aspect of the present invention is the ceiling inspection door according to the third aspect, characterized in that three fixing portions are provided at equal intervals in the circumferential direction.

A first aspect of the present invention is a ceiling inspection opening provided in a through hole drilled in the ceiling of a building, and includes a body frame portion fixed to the periphery of the through hole, and the body frame portion. A plurality of fixing parts for fixing to the ceiling part, and a rotating lid part that rotates in a direction opposite to the ceiling so as to open and close the central opening of the body frame part. In the vicinity of the outside of the rotating portion of the rotating lid portion, the opening angle of the rotating lid portion is provided in a state in which the rotating lid portion is fully opened. and a stopper portion is formed so that the central opening is at an acute angle, so that the rotating lid portion can close the central opening by its own weight when the force acting in the opening direction is removed from the rotating lid portion. It will be.

Specifically, the fixed portion is provided with a protrusion for preventing the main body from falling downward, so that the main body can be attached easily and securely.
Further, by setting the opening angle of the rotatable lid portion to an acute angle of less than 90 degrees, the rotatable lid portion rotates in the closing direction due to its own weight when the push-up force applied to the rotatable lid portion from below is removed. Then, the rotating lid portion can be easily closed.

Therefore, an operator who inspects the space above the ceiling fixes the camera to the tip of the long rod-shaped body, brings the camera itself into contact with the rotating lid and pushes it up to open the rotating lid. It becomes possible to photograph and monitor the space behind the ceiling.
That is, inspection and monitoring can be performed by one person without using a stepladder or the like.

According to a second aspect of the present invention, in the above-described first aspect, a weight member is provided at a portion of the rotating lid portion opposite to the rotating portion. The lid can satisfactorily close the central opening of the body frame by its own weight.

In the third aspect of the present invention, the fixing portion is composed of a columnar member extending upward from the back side of the body frame portion, and the protrusion is provided on the outside of the columnar member, and the protrusion moves up and down. It is characterized in that it is provided to be possible.
As a result, the columnar member is inserted from the bottom to the top along the peripheral edge of the through-hole of the ceiling, and the presence of the projection prevents the inspection door from falling downward, and the projection prevents the inspection door from falling downward. Since it can move up and down, it is possible to adjust and fix the position of the projection according to the thickness of the ceiling plate of the ceiling.

In the fourth and fifth aspects of the present invention, the shapes of the through hole formed in the ceiling portion, the body frame portion, and the rotating lid portion are specifically specified.

In a sixth aspect of the present invention, the fixing portion is specified, and three fixing portions are provided at equal intervals in the circumferential direction.
Of course, the number should be at least two or more.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a first embodiment of an inspection door in the ceiling according to the present invention, in which (A) is a cross-sectional explanatory view in a closed state, and (B) is a perspective view in an open state. It is an explanatory view of the main part of the fixed part according to the above embodiment, in which (A) is a perspective explanatory view of the inspection door in an open state as seen from the ceiling direction, and (B) is a perspective explanatory view of one fixed part. is. FIG. 12A is a perspective view of a second embodiment according to the present invention, in which FIG. . It is explanatory drawing of the conventional ceiling space inspection door, Comprising: The state which opened and closed the opening-and-closing cover part is illustrated.

An embodiment of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a first embodiment of an inspection door in the ceiling according to the present invention, in which (A) is a cross-sectional explanatory view in a closed state, and (B) is a perspective view in an open state.

The attic inspection door 10 according to the present invention includes a body frame portion 11 having a substantially circular shape in a plan view, a rotating lid portion 13 for opening and closing a central opening portion 12 passing through the center portion of the body frame portion 11, and the center It is composed of a plurality of column-shaped fixing portions 15 vertically extending upward along the periphery of the opening 12 .

The rotating lid portion 13 is rotatably attached to the body frame portion 11 at one side edge thereof.
This rotatable structure can be freely changed in design other than the shaft attachment, and it is sufficient if it can be configured to be rotatable such as hinge attachment or pivot attachment.

In this embodiment, the fixed portions 15 are formed in three columnar shapes at equal intervals in the circumferential direction, and are pushed upward along the periphery of the through-hole of the ceiling portion.
Each of the columnar fixing portions 15 is provided with a protrusion 16 (not shown in FIG. 1(B)), as will be described with reference to FIG. 2 below.

The projection 16, which will be described in detail with reference to the next figure, is provided so that its position can be changed up and down.
Thereby, the position can be changed according to the thickness of the ceiling plate 30 of the ceiling part.

Furthermore, in this embodiment, since one fixing portion 15k is provided outside the rotating portion 13k of the rotating lid portion 13, a stopper portion 13s is provided inside the fixing portion 15k.
The stopper portion 13s defines the maximum opening angle when the rotating lid portion 13 is opened in the ceiling space direction.

That is, since the stopper portion 13s is positioned outside the rotating portion 13k of the rotating lid portion 13, it is possible to define the maximum opening angle when the rotating lid portion 13 is fully opened. .
In the present invention, the maximum opening angle is set to about 80 degrees, but this function can be exhibited if this angle is an acute angle of less than 90 degrees. This is because the rotating lid portion 13 can be closed by its own weight.

In this embodiment, as described above, the stopper portion 13s is provided inside one fixed portion 15k. , a support portion for the stopper portion 13s is provided separately, and the stopper portion 13s is provided on this support portion.

In short, the stopper portion 13s only needs to be arranged outside the rotating portion 13k of the rotating lid portion 13 regardless of the position of the fixed portion 15k.

Furthermore, each outer surface of the fixed portion 15 is provided with a protrusion 16, which will be described with reference to FIG. 2 below.

FIG. 2 is an explanatory view of the main part of the fixed part according to the above embodiment, in which (A) is a perspective explanatory view of the inspection door in an open state as seen from the ceiling direction, and (B) is one fixed part. is a perspective explanatory view of the.

As can be seen from FIG. 2, the fixing portions 15 are formed in the shape of columns vertically standing upward, and are provided at three intervals in the circumferential direction along the periphery of the central opening 12 of the body frame portion 11 .
In the drawing, one fixing portion is not shown because it is positioned outside the rotating portion 13k of the rotating lid portion 13. As shown in FIG.

As described above, the three columnar fixing portions 15 are provided on the periphery of the central opening 12 of the body frame portion 11 so as to stand upward at equal intervals in the circumferential direction.
Therefore, when inserting the inspection port according to the present invention into the through-hole of the ceiling, the outer peripheral surfaces of the plurality of columnar fixing portions 15 are in sliding contact with the inner peripheral edge of the through-hole of the ceiling. inserted in good condition.

Of course, it is not necessary to completely slidably contact, but it is inserted while maintaining an appropriate clearance.
A protrusion 16 made of a leaf spring is provided on the outer peripheral surface of the fixed portion 15 .
The inspection door 10 according to the present invention is fixed to the through hole 12 of the ceiling part 30 by the projecting part 16 so as not to fall downward.

Here, the projecting portion 16 is screwed to the fixed portion 15 by a screw.
And it is possible to change this screwing position up and down.
As a result, since the fixing position of the protrusion 16 can be changed vertically, it is possible to correspond to different thicknesses of the ceiling plate 30 of the ceiling.

In order to change the screwing position of the projecting portion 16, a plurality of screw holes may be vertically arranged in the fixing portion 15, or an elongated hole may be provided for screwing.
Further, since the fixed portion 15 is formed of a leaf spring, when the fixed portion 15 is inserted into the through hole of the ceiling plate 30, the fixed portion 15 is joined to the outer peripheral surface of the through hole. can be inserted into

FIG. 3 shows a second embodiment according to the present invention, in which (A) is a perspective view of a state in which the rotating lid is closed, and (B) is a perspective view of the state in which the rotating lid is opened. It is a perspective view.
The second embodiment shown in this figure has the same basic configuration as the first embodiment.

However, the position of the fixing portion 15 is different from that of the first embodiment, and therefore the stopper portion 13s is also provided independently of the fixing portion 15. As shown in FIG.

That is, none of the fixing portions 15 is positioned outside the rotating portion 13k of the rotating lid portion 13, and one fixing portion 15 is positioned at a position facing the rotating portion 13k, The other two are provided three at equal intervals in the circumferential direction. That is, each fixed portion 15 is arranged at a position with a central angle of approximately 120 degrees.

Accordingly, the stopper portion 13s that defines the opening/closing angle of the rotating lid portion 13 is provided on the inner surface of the support portion 13t that is separate from the fixing portion 15. As shown in FIG.
Also in this second embodiment, the fully opened opening angle of the rotating lid portion 13 is set to approximately 80 degrees.

Furthermore, in the second embodiment, a weight member 19 is provided at a portion of the rotating lid portion 13 facing the rotating portion 13k.
The weight member 19 is formed as an extension portion that extends upward along the outer peripheral edge of the rotating lid portion 13 at the opposed portion of the rotating lid portion 13 .

In addition, the inspection opening in the ceiling according to the present invention is made of metal, and in particular, the one made of aluminum die-casting is most suitable.
Also in FIG. 3, the projection 16 provided outside the fixed portion 15 is omitted for simplification.

Although the inspection opening in the ceiling according to the present invention has been described above, various design changes can be made in the present invention as follows.
First, the size, material, etc. of the inspection port according to the present invention can be changed in various designs as required.
In particular, regarding the material, it is also possible to adopt a hard plastic material.

The upper surface of the main body frame serves as a joint surface that contacts the lower surface of the ceiling plate, and an adhesive can be applied to this joint surface for temporary fixing during installation.
Furthermore, it is also possible to drill a plurality of screw insertion holes in the circumferential direction of the body frame, and it is also possible to use these screw insertion holes to directly screw the body frame to the ceiling plate. is.

The fixing part is formed in the form of a column that stands upright. This fixing part also serves as a guide when inserting the frame of the main body into the through-hole of the ceiling plate. The protruding portion in contact with the back surface of the ceiling plate prevents the body frame portion from falling downward.

Although leaf springs are used as the protrusions in the above-described embodiment, the material and the like thereof can be freely selected, and it is extremely preferable that the position of the protrusions can be changed up and down.

As described above, the inspection opening in the ceiling according to the present invention has an extremely simple structure, but there is no need to use a stepladder or the like. Azimuth can be easily checked and monitored.

REFERENCE SIGNS LIST 10, 20 Ceiling inspection door 11 Body frame 12 Central opening 13 Rotating lid 13k Rotating part 13s Stopper 13t Supporting part 15 Fixing part 15r Screw hole 16 Protruding part 19 Weight member 30 Ceiling plate

Claims (6)

A ceiling inspection opening provided in a through hole drilled in the ceiling of a building,
A body frame portion fixed to the periphery of the through hole, a plurality of fixing portions for fixing the body frame portion to the ceiling portion, and a central opening portion of the body frame portion that rotates in a direction behind the ceiling so as to open and close the center opening. and a rotating lid portion that moves,
The fixed portion is provided with a protrusion for preventing the body frame portion from falling downward,
A stopper portion is formed in the vicinity of the outer side of the rotating portion of the rotating lid portion so that the opening angle of the rotating lid portion becomes an acute angle when the rotating lid portion is fully opened. An inspection door in the ceiling, wherein the rotating lid closes the central opening by its own weight when the force directed to the opening direction is removed. 2. The ceiling inspection door according to claim 1, wherein a weight member is provided at a portion of the rotating lid portion opposite to the rotating portion. The fixed portion is composed of a columnar member extending upward from the back side of the body frame portion, and the protrusion is provided outside the columnar member, and the protrusion is provided so as to be vertically movable. The ceiling inspection opening according to claim 1 or 2. The through hole drilled in the ceiling portion has a substantially circular shape, the body frame portion has a substantially circular shape, and the rotating lid portion has a substantially circular shape as well. The ceiling inspection opening according to claim 1 or 2. The through hole drilled in the ceiling portion has a substantially circular shape, the body frame portion has a substantially circular shape, and the rotating lid portion has a substantially circular shape as well. The ceiling inspection opening according to claim 3. 4. The ceiling inspection opening according to claim 3, wherein three fixing portions are provided at equal intervals in the circumferential direction.

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