JP7369048B2 - inspection door - Google Patents

Description

The present invention relates to an inspection port opened in an installation surface such as a wall or ceiling of a building.

BACKGROUND ART Equipment related to building functions (for example, ventilation, air conditioning, electrical equipment, etc.) is sometimes installed on the back side of the wall or ceiling of a building such as a house. For maintenance of such equipment, an inspection port that can be opened and closed may be provided on the wall or ceiling (hereinafter referred to as "installation surface") on which the equipment is installed. The inspection port usually has a configuration including a rectangular outer frame, an inner frame that is pivotally supported along one side of the outer frame and is rotatable, and a lid material that covers the inside of the inner frame. An example of such an inspection port is the technique described in Patent Document 1 below.

Patent No. 5660610

When installing the above equipment on the back side of the installation surface, the space on the back side of the installation surface is limited, so the thickness of the inspection opening (i.e., the distance perpendicular to the installation surface) should be as small as possible. It is desirable to do so. Further, for the same reason, it is also desirable to provide a rotation axis so that the rotation locus of a part of the inner frame does not enter the back side of the installation surface as the inner frame rotates.

In view of the above, it is an object of the present invention to provide an inspection port with a compact structure around a rotation axis, which can be installed even when there is not much free space, such as when equipment is installed on the back side of the installation surface. The task is to

In order to solve the above problems, a first aspect of the present application provides a space between a rectangular outer frame fixed to an installation opening opened in an installation surface and end sides of two opposing sides of the outer frame. An inspection port comprising: a rectangular inner frame rotatably supported on an outer frame via a rotation shaft provided therein, and a lid material provided inside; an outer frame vertical piece that is perpendicular to the installation surface, and an outer frame vertical piece that extends inward from the proximal end of the outer frame vertical piece that is close to the back side of the installation surface when attached to the installation surface. an outer frame proximal flange portion extending outward from a distal end of the outer frame vertical piece that is close to the surface side of the installation surface; an outer frame distal inner flange portion extending inward from the distal end, the inner frame being in a closed position relative to the outer frame relative to the installation surface. a vertical inner frame vertical piece; an inner frame proximal flange portion extending outward from the proximal end of the inner frame vertical piece and abutting the outer frame proximal flange portion; and the inner frame vertical piece. an inner frame distal outer flange portion extending outward from the distal end of the piece; an inner frame distal inner flange portion extending inwardly from the distal end; A hollow tubular shaft housing cylinder part extending along the longitudinal direction on the back side of one of the distal outer flange parts of the frame at least near both ends thereof, and both ends protruding into the shaft housing cylinder part. and the rotation shaft inserted in the state, and the rotation shaft is inserted at the end of the distal inner flange portion of the outer frame on two sides perpendicular to the side on which the rotation shaft is provided in the outer frame. A shaft stop portion is provided with which the outside of the tip of the rotating shaft comes into contact, and the inside of the tip of the rotating shaft is loosely fitted into the distal inner flange portion of the outer frame where the shaft stop is provided. It is characterized in that a shaft holding member is attached.

In this application, the "installation surface" refers to, for example, a ceiling or a wall surface. The wall surface can be indoors or outdoors.

In the present application, the "proximal end" of each part constituting the inspection port refers to the end of the part located close to the back side of the installation surface. If the installation surface is a ceiling, for example, the "proximal end" means the upper end. On the other hand, the term "distal end" refers to an end located close to the front surface of the installation surface, in other words, an end located far from the back surface of the installation surface. When the installation surface is a ceiling, for example, the "distal end" means the lower end. Note that the back side of the installation surface refers to the side that is covered by the inspection port and is no longer visible when the inspection port is closed. For example, when the installation surface is a ceiling, the back side of the installation surface means the space behind the ceiling. On the other hand, the surface side of the installation surface refers to the side that is not covered and visible even when the inspection port is closed. If the inspection port is installed indoors, the surface side of the installation surface means the indoor side.

Here, the shaft accommodating cylindrical portion may extend along the longitudinal direction at least at edges near both ends on the back surface side of one of the distal outer flange portions of the inner frame. That is, they may be provided only on the extended edges near both ends, or may be provided over the entire length of the edges. Further, the shaft housing cylinder portion may be formed integrally with the inner frame, or may be formed separately and fixed to the inner frame by appropriate means (for example, welding).

For example, if the members constituting the four sides of the outer frame are made common to reduce manufacturing costs, the outer frame as a flange part that includes a part at the distal end of the outer frame that receives the rotation axis that rotates the inner frame. A distal inner flange is formed. Naturally, this outer frame distal inner flange portion also exists on one side parallel to the rotation axis. Therefore, the pivot axis is separated from the vertical piece of the outer frame opposite the pivot axis by a distance corresponding to at least the width of the distal inner flange portion of the outer frame. However, since the shaft housing tube into which the rotation shaft is inserted extends along the edge of the outer flange distal to the inner frame, the distance between the rotation shaft and the vertical piece of the outer frame is far from the outer frame. It is sufficient that they are separated by the width of the inner flange portion. Furthermore, since the rotation shaft is provided at the distal end of the inner frame, it is possible to eliminate the portion that enters into the back side of the installation surface as the inner frame rotates. Thereby, the inspection port can be installed even when there is not much space on the back side of the installation surface.

Further, in a second aspect of the present application, in addition to the configuration of the first aspect, the shaft accommodating cylinder portion integrally extends over the entire length in the longitudinal direction on the back side of one of the distal outer flange portions of the inner frame. It is characterized by being set up. For example, when the inner frame is made of aluminum, the entire side of the inner frame including the shaft housing tube can be formed by extrusion molding, which facilitates mass production and eliminates the process of retrofitting the shaft housing tube. Can be omitted.

Further, in a third aspect of the present application, in addition to the configuration of the first or second aspect, a screw hole is provided on the front surface side of the outer frame proximal flange portion so that the outer frame proximal flange portion is inclined toward the back surface as it goes inward. It is characterized by being provided with a sloped portion.

An outer frame distal flange portion is located on the distal side of the outer frame proximal flange portion. Therefore, when screw holes are provided in the proximal flange of the outer frame and the outer frame is screwed to the wooden structure on the back side of the installation surface (for example, the ceiling frame if the installation surface is the ceiling) using lag screws through these screw holes, Since a portion of the screw hole is covered by the distal flange of the outer frame, it becomes difficult to insert a tool such as a screwdriver. However, in the inspection port of this embodiment, the front side of the proximal flange of the outer frame is inclined toward the back surface as it goes inward, and the screw hole is provided here, so the screw hole is oblique to the installation surface. It has become. Therefore, the lag screw is screwed in diagonally, making it easier to insert the tip of a tool such as a screwdriver.

Further, in a fourth aspect of the present application, in addition to the configuration of the third aspect, a proximal groove is formed on the surface side between the inclined portion and the vertical piece of the outer frame, and a proximal groove is formed on the surface side of the shaft pressing member. It is characterized in that a proximal protrusion that fits into the proximal groove is formed on the edge of the proximal end. By fitting the proximal protrusion of the shaft holding member into the proximal grooves provided on the two sides of the outer frame perpendicular to the side on which the rotation axis is provided, the shaft holding member shaft can slide along the outer frame. This makes it easy to move and prevents it from falling off the outer frame.

Further, in a fifth aspect of the present application, in addition to the configuration of any one of the first to fourth aspects, there is provided a circumferential groove formed in the circumferential direction on the outer periphery of the rotation shaft, and a circumferential groove in the shaft housing cylinder portion. The present invention is characterized in that it further includes a caulked portion recessed at a position corresponding to the circumferential groove. With this configuration, steps such as screwing, adhesion, or welding are not necessary when fixing the rotating shaft to the shaft housing tube.

In a sixth aspect of the present application, in addition to the configuration of any one of the first to fifth aspects, the shaft stop portion has a half-opening portion provided in a part of the vertical piece of the outer frame. It is characterized by a cut-and-raised shape that is bent toward the distal inner flange portion. With this configuration, even when the four sides of the outer frame are formed from a common member, the shaft stop portion can be formed by processing the outer frame, and there is no need to provide a separate member as the shaft stop portion.

In addition to the configuration of any one of the first to sixth aspects, a seventh aspect of the present application is that the inner frame proximal flange portion contacts the outer frame proximal flange portion via a packing member. It is characterized by This configuration ensures airtightness between the outer frame and the inner frame.

Since the present invention is configured as described above, the structure around the rotation axis is compact and can be installed even when there is not much space, such as when equipment is installed on the back side of the installation surface. It becomes possible to provide the mouth.

FIG. 3 is a perspective view of the inspection port according to the embodiment of the present invention, viewed from the back side of the installation surface. FIG. 2 shows a cross-sectional view of the installation site of the inspection port shown in FIG. 1 on the installation surface. The perspective view shows a state in which the rotation shaft is attached to the shaft housing tube. A cross-sectional view showing a state in which the rotation shaft is fixed to the shaft housing cylinder part. The procedure for attaching the inner frame to the outer frame is shown in a partially cutaway perspective view of the outer frame. The procedure for attaching the inner frame to the outer frame is shown in a partially cutaway perspective view of the outer frame. The procedure for attaching the inner frame to the outer frame is shown in a partially cutaway perspective view of the outer frame. A cross-sectional view shows a state in which the rotation shaft is fixed.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an inspection port 1 according to an embodiment of the present invention, viewed from the back side of an installation surface 2. As shown in FIG. FIG. 2 is a cross-sectional view showing a portion where the inspection port 1 of FIG. 1 is attached to the installation surface 2. As shown in FIG. The inspection port 1 includes a rectangular outer frame 10 fixed to an installation opening 3 opened in an installation surface 2 such as a ceiling or a wall, and an inner frame 20 rotatably supported on the outer frame 10. , is provided. A lid member 4 is attached to the inside of the inner frame 20. Both the outer frame 10 and the inner frame 20 are formed into a rectangular shape by joining four frame members made of extruded aluminum members with their ends cut at 45°. When the inner frame 20 rotates around one side toward the surface of the installation surface, the inspection port 1 opens as shown in FIG.

When the outer frame 10 is attached to the installation surface 2, it has an outer frame vertical piece 11 that is perpendicular to the installation surface 2, and a proximal end of the outer frame vertical piece 11 that is close to the back side of the installation surface 2. an outer frame proximal flange portion 12 that extends inward from the outer frame vertical piece 11; It includes a frame distal outer flange part 13 and an outer frame distal inner flange part 14 extending inward from the distal end. The outer frame 10 is externally attached to the installation opening 3 of the installation surface 2 by a method to be described later. A packing member 33 is interposed between the outer frame distal outer flange portion 13 and the surface side of the installation surface 2 for airtight purposes. The front surface side of the outer frame proximal flange portion 12 is a slope portion 16 that slopes toward the back surface as it goes inward. A screw hole 17 is bored in this inclined portion 16 . The outer frame 10 is fixed to the installation surface 2 by screwing the lag screws 32 through the screw holes 17 into the mounting wood 5 that is previously installed on the back side of the installation surface 2. At this time, since the lag screw 32 is screwed perpendicularly into the inclined portion 16, it is screwed into the mounting wood 5 diagonally. Therefore, the outer frame distal inner flange portion 14 located on the front side of the screw hole 17 does not interfere with inserting a tool such as a screwdriver into the head of the lag screw 32. Thereby, even if the width of the outer frame 10 is narrowed, the outer frame 10 can be mounted on the installation surface 2 without any problem. Note that a proximal groove 18 is formed on the surface side between the inclined portion 16 and the outer frame vertical piece 11. On the other hand, on the back side of the outer frame distal inner flange portion 14, a distal protrusion 19 is formed along the longitudinal direction. The proximal groove 18 and the distal protrusion 19 will be described later.

When the inner frame 20 is in the closed position with respect to the outer frame 10, the inner frame vertical piece 21 is perpendicular to the installation surface 2 and extends outward from the proximal end of the inner frame vertical piece 21. an inner frame proximal flange portion 22 that is in contact with the outer frame proximal flange portion 12; and an inner frame distal outer flange portion 23 that extends outward from the distal end of the inner frame vertical piece 21. and the inner frame distal inner flange portion 24 extending inward from the distal end, and the inner frame distal outer flange portion 23 extending integrally over the entire length in the longitudinal direction on the back surface side. A hollow tubular shaft accommodating cylindrical portion 25 is provided. Note that the shaft accommodating cylinder portion 25 is provided only on one side of the inner frame 20 that serves as the axis of rotation, and is not provided on the other three sides. The inner frame 20 is attached to the edge of the lid 4 on the inside. A packing member 33 is interposed between the distal inner flange portion 24 of the inner frame and the surface side of the lid member 4 for the purpose of heat insulation. Further, a packing member 33 is also interposed between the outer frame proximal flange portion 12 and the inner frame proximal flange portion 22 for airtight purposes.

Note that the shaft accommodating cylindrical portion 25 may be a separately formed cylindrical structure that is later attached by welding or the like. In that case, it is not necessary to provide the shaft accommodating cylinder portion 25 over the entire length of the inner frame 20 in the longitudinal direction, and it is sufficient to provide only a portion that accommodates the rotating shaft 30 near both ends.

FIG. 3 is a perspective view showing a state in which the rotation shaft 30 is attached to the shaft housing cylinder portion 25. As shown in FIG. Further, FIG. 4 is a cross-sectional view showing a state in which the rotating shaft 30 is fixed to the shaft housing cylinder portion 25. As shown in FIG. The rotation shaft 30 has a cylindrical shape with a plurality of circumferential grooves 30A formed on its outer periphery, and is inserted into both ends of the shaft housing cylinder portion 25, respectively. The tip groove 30B is located at the tip of the circumferential groove 30A. The rotation shaft 30 is inserted with the tip portion including the tip groove 30B protruding. In this state, by pressing and deforming the shaft housing cylinder part 25 from the outside with the tip of the crimping tool 40 at a position corresponding to the other circumferential groove 30A, a part of the shaft housing cylinder part 25 is pressed and deformed as shown in FIG. The caulked portion 25A recessed and recessed fits into the circumferential groove 30A, thereby fixing the rotating shaft 30 to the shaft housing cylinder portion 25.

The procedure for attaching the inner frame 20 to the outer frame 10 will be described below with reference to the perspective views of FIGS. 5 to 7. Note that in FIGS. 5 to 7, a part of the outer frame 10 is cut away to show the state in which the rotation shaft 30 is housed. Further, in FIGS. 5 to 7, the lid member 4 is omitted.

First, as shown in FIG. 5, two opposing sides of the outer frame 10 that are perpendicular to the side on which the rotation axis 30 is provided in the inner frame 20 (however, only one side is shown in the drawing) At each end of the outer frame distal inner flange portion, a half-opened portion is formed in a part of the outer frame vertical piece 11, and this half-opened portion is bent toward the outer frame distal inner flange portion 14 side. A shaft stop portion 15 having a cut and raised shape is formed. Further, the outer frame vertical piece 11 is further provided with a fixing hole 11A, which is a circular through hole. Note that an L-shaped angle 10A is attached to the outside of the corner portion of the vertical outer frame piece 11 for the purpose of fixing the end of the frame material. In this angle 10A, a portion corresponding to the fixing hole 11A is burred, a hole communicating with the fixing hole 11A is bored outward, and a thread groove is cut on the inner surface of the hole. Incidentally, an L-shaped angle is also attached to the outside of the corner portion of the vertical inner frame piece 21 for the same purpose, but it is not shown. Further, a packing member 33 is provided along the longitudinal direction on the back side of the outer frame distal outer flange portion 13, the front side of the outer frame proximal flange portion 12, and the back side of the inner frame distal inner flange portion 24. is installed.

From this state, once one side of the inner frame 20 where the rotation shaft 30 is provided is inserted diagonally through the opening of the outer frame 10, as shown in FIG. The grooves 30B are made to match the grooves formed by the distal protrusions 19 of the distal inner flange portion 14 of the outer frame.

Next, the rotating shaft 30 is slid along the distal protrusion 19 to bring the tip of the rotating shaft 30 into contact with the shaft stop 15, as shown in FIG. From this state, the substantially rectangular parallelepiped-shaped shaft holding member 31 is attached to the inside of the outer frame 10, and the tip of the rotating shaft 30 is loosely fitted into the loosely fitting portion 31C, which is an arc-shaped notch formed at one end. Ru. A proximal protrusion 31A protruding toward the back side is formed on the outside of the proximal end of the shaft holding member 31, and this proximal protrusion 31A is fitted into the proximal groove 18 of the outer frame proximal flange portion 12. In this state, the fixing screw 31B is inserted into the fixing hole 11A (see FIG. 5) of the vertical piece 11 of the outer frame and screwed into the screw groove of the communicating angle 10A, and the shaft holding member 31 is fixed to the outer frame 10. .

Then, when the inner frame 20 is rotated about the rotation shaft 30, it enters the closed state shown in FIG. 7. In this state, the inner frame proximal flange portion 22 is in pressure contact with the outer frame proximal flange portion 12 via the packing member 33.

FIG. 8 is a sectional view showing a state in which the rotation shaft 30 is fixed. A rotating shaft 30 is inserted into the shaft-accommodating cylinder portion 25 of the inner frame 20, and is fixed by a caulking portion 25A. The tip of the rotation shaft 30 is loosely fitted into the loose fitting portion 31C of the shaft holding member 31, and the distal protrusion 19 of the outer frame distal inner flange portion 14 is fitted into the tip groove 30B. The tip of the rotation shaft 30 is in contact with the shaft stop 15 . The shaft holding member 31 is fixed to the outer frame vertical piece 11 with fixing screws 31B, and the proximal protrusion 31A protruding from its proximal end is fitted into the proximal groove 18 of the outer frame proximal flange portion 12. .

As described above, according to the configuration of this embodiment, since the rotation shaft 30 is provided at the distal end and the outermost periphery, the structure around the rotation shaft 30 can be made compact, and the rotation shaft 30 is the center of the rotation shaft 30. When the inner frame 20 rotates, the outer part of the rotation shaft 30 does not enter the back side of the installation surface 2, so if equipment is installed on the back side of the installation surface 2, space is saved. It can be installed even if there is not much room.

1 Inspection port 2 Installation surface 3 Installation opening 4 Lid material 5 Mounting wood 10 Outer frame 10A Angle 11 Outer frame vertical piece 11A Fixing hole 12 Outer frame proximal flange 13 Outer frame distal outer flange 14 Outer frame distal inside Directional flange portion 15 Shaft stop portion 16 Inclined portion 17 Screw hole 18 Proximal groove 19 Distal protrusion 20 Inner frame 21 Inner frame vertical piece 22 Inner frame proximal flange portion 23 Inner frame distal outer flange portion 24 Inner frame far Inward flange portion 25 Shaft housing cylinder portion 25A Caulking portion 30 Rotating shaft 30A Circumferential groove 30B Tip groove 31 Shaft holding member 31A Proximal protrusion 31B Fixing screw 31C Loose fitting portion 32 Lag screw 33 Packing member 40 Caulking tool

Claims (7)

a rectangular outer frame fixed to an installation opening opened on the installation surface;
a rectangular inner frame that is rotatably supported on the outer frame via a rotation shaft provided between the ends of two opposing sides of the outer frame, and has a lid material provided therein; ,
An inspection port comprising:
The outer frame is attached to the installation surface,
an outer frame vertical piece perpendicular to the installation surface;
an outer frame proximal flange portion extending inward from a proximal end of the outer frame vertical piece that is close to the back side of the installation surface;
An outer frame distal outer flange portion extends outward from a distal end of the outer frame vertical piece that is close to the surface side of the installation surface, and an outer frame distal outer flange portion extends inward from the distal end. a distal inner flange portion of the outer frame provided;
Equipped with
The inner frame is in a closed position relative to the outer frame,
an inner frame vertical piece perpendicular to the installation surface;
an inner frame proximal flange portion extending outward from the proximal end of the inner frame vertical piece and abutting the outer frame proximal flange portion;
An inner frame distal outer flange portion extending outward from the distal end of the inner frame vertical piece; and an inner frame distal inner flange portion extending inward from the distal end. and,
a hollow tubular shaft-accommodating cylindrical portion extending along the longitudinal direction at least at edges near both ends on the back side of one of the distal outer flange portions of the inner frame;
the rotation shaft inserted into the shaft housing cylinder portion with both ends protruding;
Equipped with
Shaft stop portions are provided at the ends of the distal inner flange portions of the outer frame on two sides perpendicular to the side on which the rotation shaft is provided in the outer frame, respectively, with which the outside of the tip of the rotation shaft abuts. and a shaft holding member into which the inner side of the tip of the rotation shaft is loosely fitted is attached to the distal inner flange portion of the outer frame where the shaft stop portion is provided. . 2. The inspection port according to claim 1, wherein the shaft accommodating cylinder part extends integrally over the entire longitudinal length of the back side of one of the distal outer flange parts of the inner frame. Claim 1 or Claim 2, characterized in that an inclined part is provided on the front side of the outer frame proximal flange part, the inclined part being inclined toward the back surface as it goes inward and having a screw hole bored therein. Inspection port described in. A proximal groove is formed on the surface side between the inclined part and the outer frame vertical piece, and
The inspection port according to claim 3, wherein a proximal protrusion that fits into the proximal groove is formed on a proximal edge of the shaft holding member. a circumferential groove formed in the circumferential direction on the outer periphery of the rotation shaft;
a caulked portion recessed in the shaft housing cylinder portion at a position corresponding to the circumferential groove;
The inspection port according to any one of claims 1 to 4, further comprising:. Claim 1, wherein the shaft stopper has a cut-and-raised shape in which a half-opened portion provided in a part of the vertical piece of the outer frame is bent toward the distal inner flange of the outer frame. The inspection port according to any one of claims 1 to 5. The inspection port according to any one of claims 1 to 6, wherein the inner frame proximal flange portion contacts the outer frame proximal flange portion via a packing member.