JP2008111270A - Ceiling inspection port - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling inspection port which is excellent in usability, and low in production cost. <P>SOLUTION: The ceiling inspection port has an inspection port frame 4, and a lid corner bead 7. The inspection port frame 4 is obtained by forming a flange portion 2 along a peripheral edge of the inspection port 1, and arranging a restriction portion 3 on an upper surface of an internal peripheral edge of the flange portion 2 along the peripheral edge of the inspection port 1, in a manner being engageable with the interior of the inspection port 1. The cover corner bead 7 has a portion 6 to be restricted which is mounted on a peripheral edge of a cover plate 5 and engageable with the outside of the cover plate 5, and formed along the peripheral edge of the cover plate 5. The cover corner bead is mounted on the flange portion 2, and prevented from deviation from the inspection port frame 4 due to colliding contact of the portion 6 to be restricted with the restriction portion 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a ceiling inspection port.

  Conventionally, what was described in patent document 1 is known as a ceiling inspection port. In this conventional example, the ceiling inspection port fixes the inspection lid in the ceiling inspection frame by fitting the protrusion of the inspection lid into the notch of the ceiling inspection frame. The ceiling inspection frame is formed by erecting a vertical wall on the outer edge of the upper surface of the base frame having a U-shaped cross section, and the notches described above are provided at predetermined intervals on the vertical wall. The inspection lid is formed by extending an inspection lid plate in the outer frame, and the outer frame is provided with a protrusion that engages and disengages with the above-described notch.

The notch is formed in an inverted T shape by connecting a horizontally long opening to the lower end of the front vertical groove that opens to the upper end of the vertical wall, and is provided on the ceiling inspection frame of the protrusion formed on the outer frame of the inspection lid. To lock the notch, insert a protrusion into the front vertical groove from the top of the vertical wall, move the protrusion downward along the front vertical groove, and reach the horizontally long opening. This is done by moving the projections laterally along. In order to attach the outer frame of the ceiling lid to the ceiling inspection frame by forming the projection and the notch on the opposite edge of the ceiling inspection frame and the outer frame of the ceiling lid, the outer frame of the ceiling lid is attached to the opposite side. Move the projection downward so that the edges are even, pass the projection through the front vertical groove, and face the projection to the opening. The protrusion is moved to the end of the opening by moving in the lateral direction.
Japanese Patent Laid-Open No. 9-37987

  However, in the above-described conventional example, the mechanism for fixing the outer frame of the inspection lid to the ceiling inspection frame is complicated, so that it is difficult to operate the inspection lid from the indoor side and attach it to the ceiling inspection frame. , It has the disadvantage that it takes time to manufacture.

  The present invention has been made to eliminate the above-described drawbacks, and has an object to provide a ceiling inspection port that is excellent in usability and can reduce the manufacturing cost.

According to the present invention, the object is
A flange portion 2 is formed at the peripheral edge of the inspection port 1, and a restricting portion 3 that can be locked toward the inside of the inspection port 1 is formed along the peripheral edge of the inspection port 1 on the upper surface of the inner peripheral edge of the flange portion 2. Inspection port frame 4 to be
A regulated portion 6 that is attached to the peripheral portion of the lid plate 5 and can be locked toward the outside of the lid plate 5 is formed along the peripheral portion of the lid plate 5, and is placed on the flange portion 2. This is achieved by providing a ceiling inspection port having a cover parting edge 7 that is prevented from being displaced with respect to the inspection port frame 4 by contact with the restriction portion 3 of the restricted portion 6.

  According to the present invention, the inspection port frame 4 is formed with the flange portion 2 for supporting the lid parting edge 7, and the restricted portion formed on the lid parting edge 7 is formed on the upper surface of the inner peripheral edge of the flange part 2. The restricting portion 3 that prevents the lid parting edge 7 from being displaced with respect to the inspection port frame 4 is formed by the contact of 6. The flange portion 2 is formed at the peripheral portion of the inspection port 1, and supports the inspection port 1 by the lid plate 5 that is prevented from shifting in the plate surface direction by supporting the lid parting edge 7 attached to the peripheral portion of the lid plate 5. Occlude.

  The restricting portion 3 is formed so as to be able to be locked toward the inside of the inspection port 1, and the restricted portion 6 is arranged in the direction toward the outside of the cover plate 5, which is the opposite direction when the inspection port 1 is closed by the cover plate 5. Is formed so as to be able to be locked, and the restricting portion 3 and the restricted portion 6 can come into contact with each other. Further, as described above, the restricting portion 3 is provided on the inner peripheral edge of the flange portion 2, and the restricted portion 6 is supported by the flange portion 2 at the outer peripheral side of the flange portion 2, that is, at a position where it can come into contact with the restricting portion 3. Be able to be done. Further, the restricting portion 3 and the regulated portion 6 are provided along the periphery of the inspection port 1 or the cover plate 5, respectively, thereby securing the displacement of the cover plate 5 with respect to the inspection port 1 in the plate surface direction.

  For example, the restriction portion 3 is formed by providing ribs on the inner peripheral edge of the flange portion 2, and may be provided with a protrusion. If the restriction portion 3 is discontinuous along the peripheral edge of the inspection port 1, It is sufficient to arrange it in the form of dots, etc., as appropriate so that the rattling can be stopped. On the other hand, the regulated portion 6 is formed as it is at the peripheral portion of the lid plate 5, that is, the mounting position of the lid parting edge 7 on the lid plate 5, and is similar to the mounting surface of the lid parting edge 7 on the flange portion 2, for example. In addition to forming a rib or the like, it is also possible to configure the cover parting edge 7 by the inner edge of the mounting surface on the flange portion 2 itself. Further, even if either one of the restricting portion 3 and the restricted portion 6 is formed in a concave shape and the other is formed in a convex shape, the contact can be made.

  Accordingly, when the lid parting edge 7 is fixed to the inspection port frame 4, the lid parting edge 7 is placed on the flange portion 2, and the rib or the like of the restricting portion 3 formed on the upper surface of the flange portion 2 is placed on the flange portion 2. It is only necessary to confront the rib or the like of the regulated portion 6 to be placed, and the lid parting edge 7 with respect to the inspection port frame 4 by the contact between the regulating part 3 and the regulated part 6 is covered with the lid parting edge 7. A lid plate 8 (described later) formed by being attached to the plate 5 can be prevented from slipping. On the contrary, when removing the lid parting edge 7 from the inspection port frame 4, the lid parting edge 7 may be simply moved upward. It is only necessary that the regulating part 3 and the regulated part 6 be able to prevent the lid parting edge 7 from being displaced properly with respect to the inspection port frame 4 by contact, for example, when a part of the inspection port 1 is opened due to the occurrence of excessive displacement. It is enough if it can be prevented. In consideration of the workability of attaching the lid parting edge 7 to the inspection port frame 4, the restricting portion 3 and the restricted portion 6 are for the purpose that the inspection port 1 does not open when the cover plate 5 is fixed to the inspection port frame 4. It is desirable to provide an appropriate clearance within a range in which the above can be achieved.

  Further, as described above, the inspection port frame 4 has the upper surface of the flange portion 2 along the periphery of the inspection port 1, and the lid parting edge 7 has the mounting surface on the flange portion 2 along the periphery of the cover plate 5. Since it is sufficient to provide ribs or the like, the inspection opening frame 4 and the lid parting edge 7 are formed by connecting a plurality of frame materials or edge materials to each other, or by assembling to the ceiling material or the lid plate 5 etc. In addition, it can be formed by extrusion at the time of production, and in this case, it takes less time for production. It is sufficient that at least the frame material and the edge material are assembled so as to substantially surround the inspection port 1 and the like. In addition, since the regulated portion 6 is formed on the peripheral portion of the lid plate 5 by the lid parting edge 7 attached to the peripheral portion of the lid plate 5, the regulated portion 6 can be formed relatively easily. In this way, by attaching the lid parting edge 7 to the peripheral portion of the lid plate 5, the peripheral portion of the lid plate 5 can be protected.

  That is, a ceiling material is often used for the above-described lid plate 5 in consideration of harmony with the ceiling. Generally, the ceiling material is not fragile because it does not require high strength in nature, and is often fragile. By being prevented from slipping through the lid parting edge 7, damage due to contact with the inspection port frame 4 can be prevented. In this case, if the outer peripheral edge of the lid plate 5 is covered with the lid parting edge 7, the lid plate 5 comes into contact with the inspection port frame 4 or the ceiling base material when the lid parting edge 7 is inclined when the inspection port 1 is opened and closed. Damage can be prevented.

The ceiling inspection port
A flange portion 2 is formed at the peripheral edge of the inspection port 1, and a restricting portion 3 that can be locked toward the inside of the inspection port 1 is provided on the upper surface of the inner peripheral edge of the flange portion 2 along the peripheral edge of the inspection port 1. Inspection port frame 4 to be raised,
A regulated part that can be locked toward the outside of the cover plate 5 by covering the periphery of the flat cover plate 5 with the cover parting edge 7 and being stepped with the cover parting edge 7 generated at the peripheral part of the plate surface of the cover plate 5. 6 is formed along the periphery of the cover plate 5, placed on the flange portion 2, and prevented from being displaced with respect to the inspection port frame 4 by the contact between the restricting portion 3 and the restricted portion 6. It is also possible to have a lid 8 that closes the door.

  In the present invention, a lid body 8 is placed on the inspection port frame 4 to close the inspection port 1, and the lid body 8 is formed by covering the peripheral edge of the flat lid plate 5 with a lid parting edge 7. . The lid parting edge 7 may have, for example, an L-shaped cross section straddling the end surface of the cover plate 5 and the mounting surface on the flange portion 2, or a U-shaped cross section that can be externally fitted to the cover plate 5. A stepped portion is formed between the lid plate 5 and the lid parting edge 7 at the peripheral part, whereby the regulated part 6 that can be locked toward the outside of the lid plate 5 using the plate thickness of the lid parting edge 7. Form.

  Further, when the lid parting edge 7 is placed on the peripheral edge of the lid plate 5 and the step is formed as described above, the lid 8 is removed from the inspection port frame 4 and temporarily leaned against the ceiling base material or the like. The cover plate 5 does not come into contact with the ceiling base material due to the step and is not damaged. In this case, even if a dent or the like is generated in the cover parting edge 7 that contacts the ceiling base material or the like, it is not exposed to the indoor side because it is hidden by the flange portion 2 when the inspection port 1 is closed. . Furthermore, in this invention which forms the controlled part 6 by the level | step difference produced by putting the cover parting edge 7 on the board surface peripheral part of the cover plate 5, the controlled part 6 is formed inward rather than the outer periphery of the cover plate 5, The lid parting edge 7 can be easily tilted as compared with the case where the parting is stopped from the outside, so that the parting prevention of the cover parting edge 7 and the operability when removed from the inspection port frame 4 can be improved at the same time.

  In the above-described ceiling inspection port, the inspection port frame 4 and the lid parting edge 7 frame a plurality of frame members having a predetermined cross-sectional shape, or attach a plurality of edge members having a predetermined cross-sectional shape to the peripheral portion of the cover plate 5. In this way, mass productivity can be improved. On the other hand, the ceiling material that is often used as the cover plate 5 has a situation that the thickness is standardized to some extent, so that it can be used for a plurality of standardized thicknesses so that mass production is possible. The property can be further improved. In particular, the lid parting edge 7 is effective because it is not supported by the ceiling under the ceiling. In this case, each edge member 9 forming the lid parting edge 7 is externally attached to the outer peripheral edge of the lid plate 5 having a different thickness. If a pair of external fitting portions 10 having a substantially U-shaped cross-section that can be fitted are connected in a reversible manner and formed into a substantially S-shaped cross-section, the lid plate 5 having two types of thicknesses can be used. Moreover, by making it substantially S-shaped in this way, it becomes possible to suppress the thickness of the peripheral part of the lid body 8 as shown in FIG.

  As is clear from the above description, according to the present invention, it is possible to provide a ceiling inspection port that is excellent in usability and can be manufactured at a low cost, so that building facilities can be improved.

  1 to 4 show an embodiment of the present invention. The ceiling inspection port A is assembled to the inspection port frame 4 which is fixed to the peripheral portion of the opening 12 opened in the ceiling 11 and forms the inspection port 1 inside the opening 12, and the appropriate flat cover plate 5. It has a cover parting edge 7 that allows the inspection port 1 to be opened and closed, and is configured to drop the cover parting edge 7 into the inside of the inspection port frame 4 as shown in FIG.

  The inspection port frame 4 is formed by framing an inspection port frame member 13 made of an aluminum extrusion mold material, and in this embodiment in which the square inspection port 1 is formed, the inspection port frame is adapted to the shape of the inspection port 1. In order to form 4, four inspection port frame members 13 having the same shape are used. As shown in FIGS. 3A and 3B, each inspection port frame member 13 has an inverted T-shaped cross section, and has a ceiling covering piece 15 and a lid receiving piece 16 on both sides from the base end of the ceiling parting wall 14. It is formed by extending. A joint groove 34 is provided on the lower surface of the base end portion of the ceiling parting wall 14 in order to improve the appearance from the indoor side.

  The ceiling parting wall 14 is a flat plate material that faces the end surface of the opening 12 when the inspection opening frame 4 is fixed to the peripheral edge of the opening 12 of the ceiling 11, and is longer than the thickness of the ceiling material 17 that forms the ceiling 11. It is formed. The ceiling material 17 is configured by, for example, two sheets of a ceiling finishing material 17a and a ceiling base material 17b depending on the design, or by one sheet of the ceiling finishing material 17a. Therefore, in this embodiment, the ceiling parting wall 14 is: As shown in FIG.3 (b), it forms higher than the thickness of the ceiling material 17 of 2 sheets bonding. Moreover, the ceiling covering piece 15 covers the periphery of the opening 12 from the inspection port frame 4 on the indoor side, and extends horizontally from the ceiling parting wall 14 to such an extent that the material end of the ceiling material 17 can be appropriately hidden. The ceiling covering piece 15 is formed with its tip raised substantially parallel to the ceiling parting wall 14 so that the posture can be easily maintained even when it comes into contact with the ceiling material 17.

  The lid receiving piece 16 supports the lid parting edge 7 dropped into the inspection port frame 4 when the inspection port frame 4 is formed by using the inspection port frame member 13 as a frame, and the lid parting edge 7 is attached. The inspection port 1 is closed by the cover plate 5 and extends vertically from the ceiling parting wall 14 to the opposite side of the ceiling covering piece 15. The projecting dimension from the ceiling parting wall 14 is appropriately determined in consideration of the dimensions necessary for supporting the lid parting edge 7, the clearance between the ceiling parting wall 14 and the lid parting edge 7, and the like. Further, the lid receiving piece 16 is raised substantially in parallel with the ceiling parting wall 14 in consideration of locking with a lid parting edge 7 described later, and a rib-shaped detent 18 is formed. Accordingly, the lid receiving piece 16 is configured to have a flat support surface 19 projecting from the ceiling parting wall 14 and a displacement stopper 18 formed at the tip.

  As shown in FIGS. 1 and 3A, the above-described inspection port frame member 13 is cut at 45 degrees in the longitudinal direction, and four pieces form a square frame shape by aligning the respective end surfaces with each other. The inspection port frame 4 is formed. The inspection port frame members 13 are assembled together by fitting L-shaped corner pieces 21 into vertical grooves 20 formed in a slot shape on the back of the ceiling parting wall 14 and caulking the corner pieces 21.

  Therefore, the inspection port frame 4 is formed with a cylindrical portion 22 having a square cross section by a vertical wall formed by the ceiling parting wall 14, and an outward flange 23 is formed at the lower end portion thereof by the ceiling covering piece 15. The body receiving piece 16 forms an inward flange (flange portion 2). An anti-slip rib 25 is formed over the entire circumference at the tip edge of the flange surface 24 of the inward flange 2, and an inspection port 1 is formed inward of the inward flange 2.

  On the other hand, the lid parting edge 7 is composed of four lid parting edge materials 9 (lid parting edge material 9) having the same shape, and each lid parting edge material 9 is formed by molding an appropriate synthetic resin material such as vinyl chloride resin. Formed. The lid parting edge material 9 has a substantially J-shaped cross section as shown in FIG. 2 and is formed by extending a lid connecting piece 27 from one end of the lid parting wall 26 and a lid support piece 28 from the other end. The length of each lid parting edge material 9 is set to be smaller than one side of the square formed inside the cross section of the cylindrical portion 22 of the inspection port frame 4 and larger than one side of the inspection port 1.

  The lid parting wall 26 is a flat plate material facing the end face when assembled to the lid plate 5, and is formed to have a thickness of about the lid plate 5. By using the ceiling material 17 for the cover plate 5, design harmony with the ceiling 11 can be achieved. In this embodiment, the ceiling material 17 is used as the cover plate 5 in consideration of ease of opening the inspection port 1. Only one ceiling finishing material 17a is used, so that the cover parting wall 26 is formed to have a length dimension about the thickness of one ceiling finishing material 17a as shown in FIG. .

  Further, the lid connecting piece 27 mainly forms an adhesive margin for fixing the lid parting edge 7 to the lid plate 5, and is formed from one end of the lid parting wall 26 so as to have an appropriate area in consideration of the adhesive force. Overhangs horizontally. In the lid parting edge material 9, the lid connecting piece 27 is formed to be sufficiently wider than the lid support piece 28 to widen the bonding area and to reinforce the peripheral edge of the lid plate 5 from the back surface.

  The lid support piece 28 is supported by the above-described inward flange 2 when the lid parting edge 7 is formed using the lid parting edge material 9 as a frame so as to block the lid parting edge 7 and the lid plate 5 against the inspection port 1. The lid parting wall 26 extends in parallel with the lid connecting piece 27 from the opposite end to the lid connecting piece 27. The overhang dimension is appropriately determined in consideration of the strength necessary for supporting the lid parting edge 7 and the like, but is set to such a length that it can be placed on the lid receiving piece 16 without riding on the stopper 18 at least. Is done.

  The lid parting edge material 9 described above forms a lid parting edge 7 by being attached to the lid plate 5 as shown in FIG. An outer fitting portion 10 having a U-shaped cross-section that can be fitted over the lid plate 5 by horizontally extending the lid connecting piece 27 and the lid support piece 28 from both ends of the lid parting wall 26 having a height similar to the thickness of the lid plate 5. Each lid parting edge material 9 forming the above is fixed to the lid plate 5 by fitting the outer fitting portion 10 to the periphery of the lid plate 5 and filling a gap with the lid plate 5 with an adhesive (not shown). As a result, the cover parting edge material 9 is attached in a frame shape over the entire periphery of the cover plate 5 to form the cover parting edge 7, and the cover plate 5 is sized to be slightly larger than the inspection port 1. Even if the lid parting edge 7 is attached to the portion, if the size is set so as to enter the inside of the cylindrical portion 22 of the inspection port frame 4, the lid body 8 capable of closing the inspection port 1 is thereby formed.

  The lid body 8 includes a bulging portion 29 protruding along the outer peripheral edge on one surface by the lid support piece 28 of the cover parting edge 7 covering the peripheral edge portion of the lid plate 5, and the bulging portion 29 A step portion (restricted portion 6) is formed between the cover plate 5 and the entire periphery along the periphery. That is, the lid parting edge 7 has a bottom surface protruding downward from the bottom surface of the lid plate 5 by external fitting to the lid plate 5 to form a bulging portion 29, and a step portion 6 is formed by the inner peripheral edge of the bottom surface.

  As shown in FIG. 3 (b), when the lid body 8 is inserted into the inspection port frame 4, the lid body 8 is supported by the inward flange 2 on the lid parting edge 7 disposed on the periphery thereof, from the inspection port 1. The inspection port 1 is closed without falling down. In this state, the bulging portion 29 is placed on the flange surface 2 a of the inward flange 2, and if the lid body 8 is fitted in the center of the inspection port frame 4, the step portion 6 shifts to the bulging portion 29. The stop rib 25 faces.

  When the above ceiling inspection port A is constructed, the inspection port frame 4 is fixed to the periphery of the opening 12 opened in the ceiling 11, and a cut piece of the ceiling material 17 cut out from the ceiling 11 to provide the opening 12 is provided. A lid parting edge 7 and a lid 8 are formed by attaching a lid parting edge material 9 to the peripheral part of the cover plate 5 formed in an appropriate size by adjusting the dimensions. As shown in FIGS. 3B and 4, the inspection port frame 4 is fixed to the peripheral edge of the opening 12 by using a field edge 30 formed by a lightweight steel base material in the ceiling 11. The upper part of the ceiling parting wall 14 of the frame 4 is screwed to the field edge 30 or the like with a tapping screw 31. In FIG. 3B, reference numeral 32 denotes an appropriate support member that is supplementarily arranged at the edge of the inspection port frame 4 where the field edge 30 is not arranged. The inspection port frame 4 connects the outward flange 23 to the ceiling material 17. This is abutted with the periphery of the opening 12 and is fixed to the support member 32 disposed on the upper surface of the ceiling member 17 by screwing.

  The lid body 8 is formed by construction on the site where the lid parting edge material 9 carried into the interior construction site is attached to the periphery of the lid plate 5 whose size has been adjusted as described above. In this embodiment in which a lid parting edge 7 having a substantially J-shaped cross section is fitted around the periphery of the lid plate 5, the size of the lid 8 can be adjusted by the fixing position of the lid parting edge 7, Even if it exists, the cover body 8 can be manufactured easily. In FIG. 2A, 33 is a sponge for adjusting the dimensions of the outer fitting portion 10 with respect to the thickness of the lid plate 5.

  After the fixing of the inspection port frame 4 is completed, the operation is completed when the lid 8 is put in the inspection port frame 4 and the inspection port 1 is closed as described above. With the lid 8 in the center of the inspection port 1, the periphery of the lid 8 is separated from the inner peripheral surface of the cylindrical portion 22 of the inspection port frame 4, that is, the ceiling parting wall 14, thereby the lid The opening and closing operation of the body 8 is facilitated. Further, by placing the bulging portion 29 on the flange surface 2a of the inward flange 2, the lid parting edge 7 cannot be seen in the inspection port 1 from the room as shown in FIG. 17 and the inspection port frame 4 are connected by a ceiling covering piece 15 of the inspection port frame 4, and a gap between the lid 8 and the ceiling parting wall 14 of the inspection port frame 4 is formed by a lid receiving piece 16 of the ceiling inspection port A. Since it is blocked, the indoor design is not significantly damaged by the attachment of the ceiling inspection port A to the ceiling 11.

  In addition, in a state in which the inspection port 1 is closed by the lid body 8, the slip prevention rib 25 and the bulging portion 29 are opposed to each other by the step portion 6, and the inspection port 1 is opened and closed or the like. As shown in FIG. 3, even when the lid 8 is displaced on the flange surface 2a of the inward flange 2, the contact between the end surface (regulating portion 3) of the detent rib 25 and the step portion 6 of the bulging portion 29 is obtained. The contact prevents the lid 8 from being excessively displaced, and thereby prevents a part of the inspection port 1 from being opened or the cover parting edge 7 from being exposed from the inspection port 1. Further, since a cover parting edge 7 that is fitted on the periphery of the cover plate 5 protrudes, even if the periphery of the lid 8 comes into contact with the inspection port frame 4 when the inspection port 1 is opened, or the inspection port 1 is Even if the lid 8 is leaned against a lightweight steel base material in the ceiling to keep it open, the ceiling material 17 is protected by the lid parting edge 7 and will not be damaged.

  5 (a) and 5 (b) show another embodiment of the lid parting edge 7 of the present invention. In this embodiment, the same components as those in the above-described embodiment are denoted by the same reference numerals in the drawing, and description thereof is omitted. In this embodiment, two types of ceiling materials 17 having different thicknesses, that is, the lid parting edge 7 can be used in common with the lid plate 5, and the lid parting edge member 9 is shown in FIG. 5 (a). As shown in the figure, an outer fitting portion 10 having a U-shaped cross section is connected in a reversible manner to form a substantially S-shaped cross section.

  Since the outer fitting portions 10 are slightly separated by the lid connecting piece 27 and the height of the peripheral portion of the lid 8 in the thickness direction is suppressed, the opening operability of the inspection port 1 is maintained. Due to such a reversible substantially S-shape, the lid parting edge material 9 is cut at right angles to the longitudinal direction and used as shown in FIG. Although the four lid parting edges 9 cover the edges of the cover plate 5, the peripheral edge of the cover plate 5 is not damaged.

  In the above, the case where the lid parting edge material 9 is reversed with a substantially S-shaped cross section has been shown. However, as shown in FIG. The two types of ceiling materials 17 having different thicknesses can be shared.

  In addition, when two sheets are used for the ceiling material 17 as the cover plate 5, the ceiling finishing material 17a and the ceiling base material 17b can be fitted into one outer fitting portion 10 as shown in FIG. If the lid connecting piece 27 is stepped as shown in (d), the height in the plate thickness direction of the peripheral portion of the lid 8 can be suppressed.

It is a figure which shows this invention, and is a whole perspective view which shows the assembly | attachment state of an inspection port frame and a cover body. It is a figure explaining the mounting | wearing operation | work to the cover body of a cover parting edge, (a) is a principal part side view, (b) is a principal part top view. It is a figure explaining an inspection mouth frame, (a) is a principal part perspective view explaining the assembly | attachment operation | work of an inspection mouth frame material, (b) is the state fixed to the opening peripheral part opened in a ceiling, and the inspection by a cover body It is principal part sectional drawing explaining obstruction | occlusion of an opening | mouth. It is a figure explaining the slip prevention effect, (a) is principal part sectional drawing, (b) is a top view of (a). It is a figure which shows other embodiment and a modification, (a) is a principal part side view of the cover parting edge in other embodiment, (b) is a perspective view which shows the state which mounted | wore the cover parting edge with the cover part. (C) is a principal part side view which shows the modification of a lid parting edge, (d) is a principal part side view which shows the other modification of a lid parting edge.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inspection port 2 Flange part 3 Restriction part 4 Inspection port frame 5 Cover plate 6 Regulated part 7 Cover parting edge 8 Cover body 9 Edge material 10 Outer fitting part

Claims (3)

An inspection port frame that forms a flange portion at the peripheral edge of the inspection port, and that forms a restricting portion that can be locked toward the inside of the inspection port on the upper surface of the inner peripheral edge of the flange portion, along the peripheral edge of the inspection port;
A regulated portion that is attached to the peripheral portion of the lid plate and can be locked toward the outside of the lid plate is formed along the peripheral portion of the lid plate, and is placed on the flange portion to regulate the regulated portion. A ceiling inspection port having a lid parting edge that is prevented from being displaced with respect to the inspection port frame by contact with a portion. A flange part is formed on the peripheral part of the inspection port, and an inspection port frame for raising a restriction part that can be locked toward the inside of the inspection port on the upper surface of the inner peripheral part of the flange part, along the peripheral part of the inspection port,
Cover the peripheral edge of the flat lid plate with the lid parting edge and place the regulated part that can be locked toward the outside of the lid plate by the step with the lid parting edge generated at the peripheral part of the plate surface of the lid plate. A ceiling inspection port formed on the flange portion and mounted on the flange portion and prevented from being displaced with respect to the inspection port frame by contact between the restriction portion and the restricted portion, and closing the inspection opening. The lid parting edge is formed by attaching a plurality of edge members to the peripheral edge of the lid plate,
3. Each edge member is formed in a substantially S-shaped cross section by reversibly connecting a pair of outer fitting portions having a substantially U-shaped cross section that can be fitted to the outer peripheral edge of a cover plate having a different thickness. The ceiling inspection port described.

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