JP5485046B2 - Inspection port device - Google Patents

Description

  The present invention is a frame body that is fixed to a peripheral portion of a hole formed in an indoor ceiling plate and has an inspection port for accessing the back side of the ceiling plate from the indoor side, and the frame body for opening and closing the inspection port. It is related with the inspection port apparatus provided with the cover material attached to.

  Conventionally, in order to check for defects such as various wiring and piping existing on the back side (ceiling back) of ceiling boards installed inside buildings such as houses, or the presence of rain leaks, holes have been provided in the ceiling boards. In addition, an inspection port device having an inspection port for accessing the back of the ceiling is provided at the periphery of the hole.

  For example, Patent Document 1 below includes a rectangular frame-shaped frame attached to the periphery of a rectangular hole (opening) formed in a ceiling plate, and a lid member that opens and closes an inspection port surrounded by the frame. An inspection port device provided is disclosed. During inspection, open the cover and open the inspection port, access the back of the ceiling through the inspection port, and perform necessary inspections.

JP 2008-291593 A

  Here, in the inspection port device disclosed in the above-mentioned Patent Document 1, in the field edge (a wooden or light metal framework for attaching the ceiling plate) as a base material disposed on the back surface (upper surface) of the ceiling plate, The inspection port device is fixed by screwing the frame.

  However, in the configuration in which the frame body is screwed to the field edge, the inspection port device can be attached only where the field edge exists, and there is a problem that the size and shape thereof are limited. For example, in order to screw the frame body to the field edge, as shown in the above-mentioned Patent Document 1, the distance (pitch) between one field edge and another field edge adjacent thereto is substantially reduced. It is necessary to form a rectangular frame having the matching dimensions, and screw one side and the other side to the adjacent field edges. Thus, in the structure in which the frame is screwed to the field edge, the size and shape are limited by the distance between the field edges.

  Therefore, if the frame body can be directly attached to the ceiling plate instead of a base material such as a field edge, the degree of freedom of size, shape, etc. can be expanded. However, it is impossible to fix the frame body to the ceiling board by the same method (screwing) as described above. In other words, the ceiling board is generally made of plaster board (plaster board), but even if you try to screw a screw or screw on the board made of such a material, it will spin around and fix the frame with sufficient strength. Can not do it. Therefore, it is difficult to fix the frame body directly to the ceiling board by screwing or the like, and normally, the inspection port device can be attached only to the place where the base material exists.

  From such a point, a structure capable of fixing the frame body to the ceiling board with sufficient strength by some method other than screwing is required. And since the thickness of a ceiling board changes variously by the specification etc. of a building, it is still desirable if a frame can be fixed in spite of such a difference in thickness.

  The present invention has been made in view of the above circumstances, and is an inspection port that can be attached to a ceiling panel with sufficient strength and can flexibly cope with a difference in thickness of the ceiling panel. An object is to provide an apparatus.

  In order to solve the above-mentioned problems, the present invention is a frame body fixed to a peripheral portion of a hole formed in an indoor ceiling board and surrounding an inspection port for accessing the back side of the ceiling board from the inside, An inspection port apparatus comprising a lid member attached to the frame body for opening and closing the inspection port, and a fastener that can be mounted from the inner diameter side to fix the frame body, the frame body, It has a cylindrical peripheral wall portion extending in the vertical direction and a flange portion protruding radially outward from the lower end portion of the peripheral wall portion, and the peripheral wall portion is radially arranged at a plurality of different height positions in the peripheral wall portion of the frame body. The fastener can be inserted into the attachment hole of any height from the inside in the radial direction, and the fastener can be inserted radially outside the peripheral wall portion in the inserted state. It protrudes and elastically changes at least in the vertical direction with respect to the top surface of the ceiling panel. However, the ceiling plate is sandwiched between the pressing portion and the upper surface of the flange portion of the frame body according to the elastic force of the pressing portion, so that the frame body is the ceiling plate. It is characterized by being fixed to (Claim 1).

  In the present invention, the fastener inserted from the radially inner side into the mounting hole provided in the peripheral wall portion of the frame body, and the flange portion of the frame body are arranged with a ceiling plate interposed therebetween, and in that state Since the ceiling plate is elastically sandwiched between the pressing portion and the upper surface of the flange portion due to elastic deformation of the pressing portion of the fastener, a material such as gypsum that is difficult to fasten screws, screws, etc. Even if it is a ceiling board which consists of, a frame can be fixed to the ceiling board with sufficient intensity | strength.

  Moreover, since the mounting holes are provided at a plurality of different height positions in the peripheral wall portion, and the mounting holes into which the fasteners are inserted can be selected according to the thickness of the ceiling panel, the thickness of the ceiling panel Even if it differs depending on the specifications of the building or the like, the fastener can be inserted into the mounting hole without any problem, and the ceiling plate can be pressed with an appropriate force by the pressing portion to fix the frame.

  And when inspecting the back side (ceiling back) of the ceiling board, open the cover and open the inspection port, and access the back of the ceiling through the inspection port. It is possible to properly check for defects such as pipes and pipes, and the presence of rain leaks.

  In the present invention, preferably, the fastener has a base portion arranged along the inner peripheral surface of the peripheral wall portion in a state of being inserted into the mounting hole of the peripheral wall portion, and the pressing portion is It has an upper surface portion that protrudes from the base portion to the radially outer side of the peripheral wall portion through the mounting hole, and a folded portion that is folded back from the tip of the upper surface portion and extends obliquely downward, and the lower end portion of the folded portion is the ceiling plate (Claim 2).

  According to this configuration, when the fastener is inserted from the radially inner side into the mounting hole of the peripheral wall portion, the pressing portion of the fastener is elastically deformed flexibly so as to narrow the angle between the upper surface portion and the folded portion. Thus, the fastener can be easily inserted, and after insertion, the folded portion of the pressing portion is pressed against the upper surface of the ceiling plate with an appropriate force, so that the frame body has sufficient strength against the ceiling plate. Can be fixed.

  In the above configuration, more preferably, the upper surface portion of the pressing portion has a first locking portion and a second locking portion protruding upward at portions positioned on the radially inner side and the outer side of the peripheral wall portion. And the said 1st, 2nd latching | locking part has the function which prevents the drop-off | omission of the said fastener from the said attachment hole by pinching | interposing the upper edge of the said attachment hole in between (Claim 3).

  According to this configuration, it is possible to more stably fix the frame body to the ceiling plate by preventing the fastener from falling off.

  In the present invention, preferably, three or more mounting holes are provided at intervals in the circumferential direction at a plurality of height positions of the peripheral wall portion.

  In this way, when the ceiling plate is sandwiched between the fastener and the flange portion at three or more locations, the mounting strength of the frame can be sufficiently secured.

  In the present invention, preferably, the inspection port device further includes a cylindrical extension member surrounding a hole continuous with the inspection port, and the extension member extends from the frame body to the upper side thereof. It can be attached to the upper end of the body (claim 5).

  According to this configuration, even when the total thickness of the ceiling is considerably large, such as when a heat insulating material is applied to the back surface of the ceiling board, the inspection port surrounded by the frame and the continuous opening are continuous. Through the hole of the extension member, the back of the ceiling can be easily accessed.

  In the above configuration, more preferably, the extension member has a tapered outer peripheral surface whose outer diameter decreases toward the upper side so that the extension member can be inserted from below into the inspection port, and is inserted into the inspection port. When the outer peripheral surface of the lower end portion of the extension member is in close contact with the upper end portion of the peripheral wall portion, the extension member is fixed to the frame (Claim 6).

  According to this configuration, by using the tapered outer peripheral surface of the extension member, the extension member can be easily fixed to the frame body without using a member such as a screw or a screw.

  As described above, according to the present invention, it is possible to provide an inspection port device that can be attached to a ceiling panel with sufficient strength and can flexibly cope with a difference in thickness of the ceiling panel. it can.

It is sectional drawing which shows the whole structure of the inspection port apparatus concerning 1st Embodiment of this invention. It is a perspective view which shows the frame of the said inspection port apparatus alone. It is a top view which shows the said frame alone. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is a perspective view which shows the cover material of the said inspection port apparatus alone. It is sectional drawing of the said cover material. It is a perspective view which shows the fastener of the said inspection port apparatus alone. It is a figure for demonstrating the attachment procedure of the said inspection port apparatus, and is sectional drawing which shows the state which temporarily fixed the frame to the ceiling board. It is a figure which shows the state when inserting a fastener in the attachment hole of a frame after FIG. FIG. 10 is a partially enlarged view of FIG. 9. It is a figure which shows a state when attaching a cover material to a frame after FIG. It is a figure which shows the example of attachment when a ceiling board is comparatively thick. It is a figure for demonstrating 2nd Embodiment of this invention.

<Embodiment 1>
FIG. 1 is a cross-sectional view showing the overall configuration of the inspection port device 1 according to the first embodiment of the present invention. The inspection port apparatus 1 shown in this figure is provided in a circular hole C formed in the ceiling board PB. The inspection port device 1 is detachably attached to the frame 2 fixed to the peripheral edge of the hole C, the fastener 3 that can be mounted from the inner diameter side to fix the frame 2, and the lower end of the frame 2. And a lid member 4 attached to the lid. The frame body 2 is a member surrounding the inspection port 10 extending in the vertical direction, and the inspection port 10 is opened or closed by the attachment / detachment of the lid member 4. Note that the frame body 2 and the lid member 4 are connected by a chain 5 in order to prevent the lid member 4 from falling off when the lid member 4 and the frame body 2 are disengaged.

  The ceiling plate PB is a plate material provided in a ceiling portion of a building such as a house, and its lower surface forms an indoor ceiling surface (decorative surface). Gypsum is often used as the material for the ceiling board PB. The inspection port device 1 is used for inspection of the ceiling back S, which is a space formed on the back side (upper side) of the ceiling board PB. Specifically, in this embodiment, a small photographic device such as a fiberscope is inserted up to the ceiling S through the inspection port 10, and a predetermined inspection is performed based on an image acquired from the fiberscope or the like.

  2-4 is a figure which shows the said frame 2 alone, FIG. 2 is a perspective view, FIG. 3 is a top view, FIG. 4 is sectional drawing. As shown in FIGS. 2 to 4 (and FIG. 1), the frame body 2 has a cylindrical peripheral wall portion 11 extending in the vertical direction and a circular ring shape protruding radially outward from the lower end portion of the peripheral wall portion 11. And a flange portion 12. As a specific example of the dimensions of the frame body 2, the overall height is about 50 mm, the outer diameter of the flange portion 12 is about φ110 mm, and the diameter of the inspection port 10 surrounded by the inner peripheral surface of the peripheral wall portion 11 (an arc portion described later) 11a) is about φ90 mm. Moreover, as a material of the frame 2, for example, a synthetic resin such as ABS is suitable. The peripheral wall 11 is provided with a draft angle required when the frame body 2 is molded using a mold. For this reason, the diameter of the inspection port 10 is set such that the diameter of the lower end is the largest (about φ90 mm), and the diameter of the upper end is set to a slightly smaller value (for example, about φ88 mm).

  The peripheral wall portion 11 is provided with mounting holes 15a, 15b, 15c penetrating in the radial direction at different height positions. When the frame 2 is fixed to the ceiling plate PB, as shown in FIG. 1 (or FIG. 9 or the like described later), the peripheral wall portion 11 is inserted into the hole C of the ceiling plate PB, The fastener 3 is inserted into one of the attachment holes 15a, 15b, and 15c (the lowermost attachment hole 15a in the example of FIG. 1) from the radially inner side.

  The peripheral wall portion 11 includes a plurality of arc portions 11a formed in an arc shape and a plurality of flat plate portions 11b formed in a flat plate shape, and the arc portions 11a and the flat plate portions 11b are alternately continuous in the circumferential direction. The peripheral wall portion 11 having a shape close to a cylindrical shape is formed. In the illustrated example, six arc portions 11a and six flat plate portions 11b are provided. Among these, the mounting holes 15a, 15b, and 15c are formed in the flat plate portion 11b.

  Specifically, the mounting hole 15a at the lowest position and the mounting hole 15b positioned one step higher than that are formed in the three flat plate portions 11b, and the mounting hole 15c at the highest position is the other. Are formed on the three flat plate portions 11b. That is, each of the mounting holes 15a, 15b, and 15c is provided in three at a different height position with an interval in the circumferential direction. Hereinafter, the attachment holes 15a, 15b, and 15c may be simply referred to as attachment holes 15 when collectively referred to.

  Of the peripheral wall portion 11, the three flat plate portions 11 b provided with the highest mounting hole 15 c are each provided with a fitting hole 16 having a relatively small diameter at a height position lower than the mounting hole 15 c. . As will be described later, the fitting hole 16 functions as a hole for fixing the lid member 4.

  5 and 6 are views showing the lid member 4 alone, FIG. 5 is a perspective view, and FIG. 6 is a cross-sectional view. As shown in FIGS. 5 and 6 (and FIG. 1), the lid member 4 includes a disc-like lid body 21 having an outer diameter slightly larger than the flange portion 12 of the frame body 2, and the lid body 21. And an insertion portion 22 having a relatively short height protruding from the upper surface. As the material of the lid member 4, for example, a synthetic resin such as ABS is suitable as in the case of the frame 2.

  The shape of the lid body 21 is a disc shape in the present embodiment, but can be freely set according to the shape of the inspection port 10 or the like. Further, the height of the insertion portion 22 only needs to be such that the lid member 4 can be relatively positioned with respect to the inspection port 10. For example, about 10 mm is sufficient.

  The insertion part 22 of the lid member 4 is substantially cylindrical in plan view, approximating the peripheral wall part 11 of the frame body 2 (that is, a shape in which arc parts and flat plate parts are alternately continued like the peripheral wall part 11). The outer shape is set to be slightly smaller than the peripheral wall portion 11. The insertion portion 22 is inserted from below into the inspection port 10 surrounded by the peripheral wall portion 11 in the state of FIG.

  Of the insertion portion 22, three separation portions 23 separated from the surroundings by vertical notches are formed in three circumferential directions, and a protrusion projecting outward in the circumferential direction is formed at the upper end portion of each separation portion 23. A piece 23a is provided. As shown in FIG. 1, when the lid member 4 is attached to the frame body 2, the protruding pieces of the insertion portion 22 are inserted into the three fitting holes 16 formed in the peripheral wall portion 11 of the frame body 2. The lid member 4 is fixed to the frame body 2 by inserting 23a.

  FIG. 7 is a perspective view showing the fastener 3 alone. As shown in the figure, the fastener 3 has a base portion 31 extending in the vertical direction and a pressing portion 32 protruding outward from the upper end portion of the base portion 31. The pressing portion 32 has a shape capable of pressing the upper surface portion of the ceiling plate PB in the inserted state (see FIG. 9 and the like) inserted into the attachment hole 15 of the frame body 2. In the present embodiment, the fastener 3 is formed by a single metal plate that has been bent and the like, and the pressing portion 32 of the fastener 3 comes into contact with the ceiling plate PB while elastically deforming in the vertical direction. The ceiling plate PB is pressed downward.

  Specifically, the pressing portion 32 includes an upper surface portion 33 that extends in a direction substantially orthogonal to the base portion 31, and a folded portion 34 that is folded back from the tip of the upper surface portion 33 and extends obliquely downward. A first locking portion 33 a and a second locking portion 33 b are formed at the base end portion (a portion near the base portion 31) of the upper surface portion 33. The first locking portion 33 a is obtained by cutting and raising a part of the upper surface portion 33, and is erected vertically so as to be flush with the base portion 31. The second locking portion 33b is formed by slightly raising the nearest portion of the first locking portion 33a upward, and is erected obliquely upward so as to face the first locking portion 33a.

  When the frame 2 is fixed to the ceiling board PB, as shown in FIG. 9, the diameter of the peripheral wall 11 is set in the mounting hole 15 (any one of the mounting holes 15a, 15b, 15c) of the peripheral wall 11. The fastener 3 is inserted from the inside in the direction. In the state after insertion, as shown in FIG. 10, the pressing portion 32 of the fastener 3 protrudes to the radially outer side of the peripheral wall portion 11, while the base portion 31 remains on the radially inner side of the peripheral wall portion 11. It arrange | positions along the inner peripheral surface. In this state, the pressing portion 32 has an angle between the upper surface portion 33 and the folded portion 34 that is narrower than the initial state, and is elastically deformed in the vertical direction. And the lower end part of the folding | returning part 34 is pressed against the upper surface part (periphery part of the hole C) of the ceiling board PB by the elastic force of the press part 32 which arises in connection with this, and the ceiling board PB is pressed below. As described above, the ceiling plate PB is elastically sandwiched between the upper surface of the flange portion 12 of the frame body 2 and the pressing portion 32, and the frame body 2 is fixed so as not to move in the vertical direction.

  Further, in the state where the fastener 3 is inserted into the attachment hole 15, the first locking portion 33 a provided on the upper surface portion 33 of the pressing portion 32 is disposed on the radially inner side of the peripheral wall portion 11, and the second The engaging portion 33b is disposed on the outer side in the radial direction of the peripheral wall portion 11, and the upper edge of the mounting hole 15 is sandwiched between the first and second engaging portions 33a and 33b, so that the fastener 3 is in the radial direction. It is fixed so as not to move.

  Next, a procedure for attaching the inspection port device 1 configured as described above to the ceiling board PB will be described with reference to FIGS. Assuming that the inspection port apparatus 1 is attached, it is assumed that a hole C having a predetermined diameter (slightly larger than the peripheral wall portion 11 of the frame 2) is formed in the ceiling board PB in advance.

  In order to attach the inspection port device 1, first, the frame body 2 is arranged below the hole C so that the flange portion 12 faces downward. As shown in FIG. 8, the flange portion 12 is the lower surface of the ceiling plate PB. The peripheral wall portion 11 of the frame body 2 is inserted into the hole C until it comes into contact with (the peripheral edge portion of the hole C). In addition, the lid 2 (FIG. 11) is connected to the frame body 2 via the chain 5. At the time of FIG. 8, the lid 4 is hung from the end of the chain 5. In FIG. 8, illustration of the hanging lid member 4 is omitted (the same applies to FIG. 9).

  Next, as shown in FIG. 9, the diameter of the mounting hole 15 formed in the peripheral wall portion 11 is reduced in diameter while holding the frame body 2 in a state of being inserted into the hole C by manually pressing the flange portion 12 from below. The fastener 3 is inserted from the inside in the direction. As the mounting hole 15, holes 15 a, 15 b, 15 c exist in ascending order of height, but in the illustrated example, the fastener 3 is inserted into the mounting hole 15 a having the lowest height.

  When the fastener 3 is inserted, it is inserted into the attachment hole 15a first from the pressing portion 32. At this time, the pressing portion 32 is gradually pushed outward in the radial direction while elastically deforming in the vertical direction so as to narrow the angle (the angle between the upper surface portion 33 and the pushing back portion 34 shown in FIG. 10). Then, the base portion 31 (and the first locking portion 33a) is finally pushed out until it comes into contact with the inner peripheral surface of the peripheral wall portion 11, so that the folded portion 34 comes out of the mounting hole 15a as shown in FIG. Then, it moves to the outer side in the radial direction of the peripheral wall portion 11, and the lower end portion of the pushing-back portion 34 is pressed against the upper surface portion of the ceiling plate PB.

  At this time, the second locking portion 33b provided on the upper surface portion of the pressing portion 32 is positioned slightly radially outside the peripheral wall portion 11, and the second locking portion 33b and the inner side of the peripheral wall portion 11 are located. The upper edge of the mounting hole 15a is sandwiched between the first locking portion 33a located at the top. Since there are three mounting holes 15a in the circumferential direction of the peripheral wall portion 11, a total of three fasteners 3 are prepared and inserted into the three mounting holes 15a (FIG. 9).

  When the fastener 3 is inserted as described above, the ceiling plate PB is pressed downward by the elastic force of the pressing portion 32 of the fastener 3, and between the pressing portion 32 and the upper surface of the flange portion 12. When the ceiling plate PB is sandwiched, the frame body 2 is fixed so as not to move in the vertical direction with respect to the ceiling plate PB. At this time, the upper edge of the mounting hole 15 is sandwiched between the first and second engaging portions 33a and 33b of the pressing portion 32 (FIG. 10), and the fastener 3 is fixed so as not to move in the radial direction. By doing so, the fastener 3 is prevented from falling off from the mounting hole 15a.

  Here, which of the mounting holes 15a, 15b, and 15c having different heights to be inserted is determined according to the thickness of the ceiling board PB. The example of FIG. 9 assumes a case where a plaster board having a thickness of about 12.5 mm widely used in a house or the like is applied as the ceiling board PB. By inserting the fastener 3 into the mounting hole 15a having a low height, the pressing portion 32 of the fastener 3 is pressed against the upper surface portion of the ceiling plate PB with an appropriate force, so that the frame body 2 has a sufficient strength. It is fixed to the plate PB.

  On the other hand, as shown in FIG. 12, there are cases where two plasterboards having the same thickness as that of FIG. In the example of this figure, the thickness of the ceiling board PB is about 25 mm in total. In such a case, the fastener 3 may be inserted into the mounting hole 15b that is one step higher than the mounting hole 15a. Thereby, even if it is the ceiling board PB of 2 times in total thickness, the fastener 3 can be inserted and fixed to the attachment hole 15b without a problem, and the ceiling part PB is pressed by the pressing part 32 with an appropriate force. Thus, the frame 2 can be fixed.

  Furthermore, although illustration is omitted, there are cases in which ceiling boards PB having a total thickness of less than 30 mm are constructed in areas where high heat insulation properties are required, such as in cold regions. Even in such a case, if the fastener 3 is inserted into the attachment hole 15c located higher than the attachment hole 15b, the ceiling plate PB is properly pressed by the pressing portion 32 with an appropriate force. Can be attached).

  When the fixing of the frame body 2 to the ceiling plate PB is completed as described above, the lid member 4 is attached to the lower end portion of the frame body 2 as shown in FIG. Specifically, the lid member 4 is disposed below the frame body 2 with the insertion portion 22 facing upward, and the insertion portion 22 of the lid member 4 is inserted into the inspection port 10. At this time, the lid member 4 is framed so that the projecting pieces 23 a provided at three places in the circumferential direction of the insertion portion 22 are located at positions corresponding to the fitting holes 16 provided at three places in the circumferential direction of the peripheral wall portion 11. Align with the body 2 in advance. As a result, the protruding piece 23a is fitted into the fitting hole 16 in the state where the lid member 4 is inserted until the outer peripheral portion of the lid main body 21 contacts the flange portion 12 of the frame body 2 (FIG. 1), and the frame body. The lid 4 is fixed to 2.

  By the above procedure, the attachment of the inspection port device 1 to the ceiling board PB is completed (see FIG. 1). Although not shown, seal packings are provided between the flange portion 12 of the frame body 2 and the ceiling plate PB and between the flange portion 12 and the lid body 21 of the lid member 4. Also good.

  When inspecting the back side (ceiling back S) of the ceiling plate PB, the lid member 4 is pulled downward and removed from the frame body 2, and the inspection port 10 of the frame body 2 is opened. Then, from the lower side (indoor side) of the ceiling board PB, a small photographing device such as a fiberscope is inserted to the ceiling back S through the opened inspection port 10, and based on an image acquired from the fiberscope or the like. Then, a predetermined inspection, for example, an inspection for checking for defects such as wiring and piping existing in the ceiling S, or the presence or absence of rain leakage, is performed. The value (about φ90 mm) exemplified above as the diameter of the inspection port 10 is set as a suitable value for performing the insertion operation of the fiberscope or the like.

  As described above, the inspection port device 1 according to the first embodiment is fixed to the peripheral portion of the hole C formed in the indoor ceiling plate PB, and indoors on the back side (ceiling back S) of the ceiling plate PB. A frame 2 surrounding the inspection port 10 for access, a lid member 4 attached to the frame 2 for opening and closing the inspection port 10, and a fastening that can be attached from the inner diameter side to fix the frame 2 The tool 3 is provided. The frame body 2 has a cylindrical peripheral wall portion 11 extending in the vertical direction, and a flange portion 12 protruding radially outward from a lower end portion of the peripheral wall portion 11, and a plurality of the peripheral wall portions 11 of the frame body 2 are provided. At different height positions, there are provided attachment holes 15 penetrating the peripheral wall portion 11 in the radial direction, and the fastener 3 can be inserted into the attachment holes of any height from the inside in the radial direction. The fastener 3 has a pressing portion 32 that protrudes radially outward of the peripheral wall portion 11 in an inserted state and contacts the upper surface portion of the ceiling plate PB while elastically deforming in the vertical direction. When the ceiling plate PB is sandwiched between the pressing portion 32 and the upper surface of the flange portion 12 of the frame body 2 according to the force, the frame body 2 is fixed to the ceiling plate PB. According to such a configuration, the frame body 2 can be attached to the ceiling plate PB with sufficient strength, and the difference in thickness of the ceiling plate PB can be flexibly dealt with.

  That is, in the said 1st Embodiment, the fastener 3 inserted from the radial inside to the attachment hole 15 provided in the surrounding wall part 11 of the frame 2, and the flange part 12 of the said frame 2 are the ceiling between them. In this state, the pressing portion 32 of the fastener 3 is elastically deformed, and the ceiling plate PB is elastically sandwiched between the pressing portion 32 and the upper surface of the flange portion 12. Therefore, even if the ceiling plate PB is made of a material such as gypsum that is difficult to fasten screws or screws, the frame body 2 can be fixed to the ceiling plate PB with sufficient strength.

  Moreover, the mounting holes 15 (15a, 15b, 15c) are provided at a plurality of different height positions in the peripheral wall portion 11, and the fastener 3 is inserted from the mounting holes 15 in accordance with the thickness of the ceiling plate PB. Since the mounting hole can be selected, even if the thickness of the ceiling panel PB varies depending on the building specifications, etc., the fastener 3 can be inserted into the mounting hole 15b without any problem and the pressing part 32 can be used to press the ceiling panel PB with an appropriate force. The frame 2 can be fixed.

  Of course, since the fastener 3 is made of an elastic body, if the difference in thickness of the ceiling plate PB to be constructed is not so great, even if the attachment holes 15 are not provided at a plurality of height positions, The resilient force of the pressing portion 32 can be applied to the ceiling plate PB without any problem, and the frame body 2 can be appropriately fixed to the ceiling plate PB. However, depending on the specifications of the building and the like, the thickness of the ceiling panel PB may vary greatly, for example, as shown in FIG. In such a case, if the height of the attachment hole 15 is only one type, the fastener 3 cannot be properly attached.

  For such a problem, in the first embodiment, the mounting holes 15 (15a, 15b, 15c) are provided at a plurality of different height positions, and the mounting hole 15 into which the fastener 3 is inserted is appropriately selected. Therefore, even if the variation of the thickness of the ceiling board PB is quite wide, the frame body 2 can be fixed by properly inserting the fastener 3 into the mounting hole 15.

  When the ceiling back S is inspected using the inspection port apparatus 1 having the above-described configuration, the inspection port 10 is removed with the lid 4 removed from the frame 2 and the inspection port 10 being opened. By inserting an imaging device such as a fiberscope into the back of the ceiling S, you can easily access the back of the ceiling S and perform necessary inspections (for example, wiring or piping existing in the ceiling S, etc., or whether there is a leak) Inspection).

  Moreover, in the said 1st Embodiment, when the fastener 3 which has the base part 31 and the press part 32 is prepared and the fastener 3 is inserted in the said attachment hole 15, it follows the inner peripheral surface of the surrounding wall part 11. FIG. While the base part 31 is arrange | positioned, the press part 32 protrudes to the radial direction outer side of the surrounding wall part 11 through the said attachment hole 15. As shown in FIG. Further, the pressing portion 32 includes an upper surface portion 33 extending in a direction substantially orthogonal to the base portion 31, and a folded portion 34 that is folded back from the tip of the upper surface portion 33 and extends obliquely downward. The lower end is pressed against the ceiling board PB. According to such a configuration, there is an advantage that the fastener 3 can be easily inserted into the attachment hole 15 and the frame body 2 can be appropriately fixed to the ceiling board PB in that state.

  That is, in the case of the fastener 3 having the shape as described above, the angle between the upper surface portion 33 and the folded portion 34 is narrowed when the fastener 3 is inserted into the mounting hole 15 of the peripheral wall portion 11 from the radially inner side. Since the fastener 3 is elastically deformed flexibly, the fastener 3 can be easily inserted until the pressing portion 32 protrudes outward in the radial direction of the peripheral wall portion 11 (until the folded portion 34 comes out of the attachment hole 15). it can. After the insertion, the angle between the upper surface portion 33 and the folded portion 34 is enlarged again, and the folded portion 34 is pressed against the upper surface portion of the ceiling plate PB with an appropriate force, so that the frame 2 is attached to the ceiling plate PB. Can be fixed with sufficient strength.

  Furthermore, in the said 1st Embodiment, the 1st latching | locking part 33a and the 2nd latching | locking part 33b are in the site | part located in the radial direction inner side and outer side of the surrounding wall part 11 at the time of insertion among the upper surface parts 33 of the fastener 3. FIG. The upper edge of the mounting hole 15 is sandwiched between the locking portions 33a and 33b. According to such a configuration, the fastener 3 is fixed so as not to move in the radial direction, and the fastener 3 is prevented from falling off from the attachment hole 15a. Therefore, the frame body 2 is more stably attached to the ceiling plate PB. Can be fixed to.

  Moreover, in the said 1st Embodiment, the attachment holes 15a, 15b, and 15c are each provided in the some height position of the surrounding wall part 11 at intervals in the circumferential direction, and the fastener 3 and the flange are provided. Since the ceiling plate PB is sandwiched by the portion 12 at three locations, the mounting strength of the frame 2 can be sufficiently ensured.

  In the first embodiment, the diameter of the inspection port 10 is set to about φ90 mm, and when inspecting the ceiling back S, a small photographic device such as a fiberscope is inserted into the ceiling back S through the inspection port 10. However, if the diameter of the inspection port 10 is increased to a size that allows a person to enter and exit (for example, about 500 mm), the operator enters the ceiling S through the inspection port 10 and is visually observed by the operator. It is also possible to perform an inspection. The configuration of the present invention can also be suitably applied to an inspection port device intended for inspection by such a method (that is, the inspection port 10 having a diameter that allows humans to enter and exit).

  However, for example, in a case where the space of the ceiling back S is quite narrow, it is impossible for an operator to enter the ceiling back S for inspection. As in the inspection port device 1 according to the first embodiment, it is assumed that a small photographic device such as a fiberscope is inserted into the ceiling S from the inspection port 10 (the diameter of the inspection port 10 is relatively small). Is suitable when the operator cannot enter and inspect as described above.

  Moreover, in the said 1st Embodiment, the circular surrounding wall part 11 in which the circular arc part 11a and the flat plate part 11b continued alternately was formed, and the inspection port 10 close | similar to the circle | round | yen enclosed by this surrounding wall part 11 was formed. However, the shape of the inspection port 10 is not limited to this, and may be a perfect circle or a rectangle, for example.

  In any case, according to the above configuration in which the frame 2 is fixed by sandwiching the ceiling plate PB between the fastener 3 and the flange portion 12, a base material such as a field edge (to attach the ceiling plate PB Since the inspection port apparatus can be freely attached where there is no frame material (disposed on the back surface), the degree of freedom such as size and shape is high, and application to various types of inspection port apparatuses is expected.

  Moreover, in the said 1st Embodiment, the attachment hole 15 (15a, 15b, 15c) is each provided in three height positions in the surrounding wall part 11 of the frame 2, and it attaches to the attachment hole of any height in these. Although the fastener 3 is inserted, the height at which the attachment hole 15 is provided is not limited to three, and may be two or four or more.

  Furthermore, in the said 1st Embodiment, the attachment of the ceiling board PB by the fastener 3 and the flange part 12 is carried out by providing each three mounting holes 15a, 15b, 15c from which height differs in the circumferential direction, respectively. The number of the mounting holes 15a, 15b, and 15c is not limited to three. For example, the number of the mounting holes 15a, 15b, and 15c is increased from three, and the fastener 3 is inserted at a position exceeding three in the circumferential direction. It is good also as a structure. If it does in this way, frame 2 can be fixed more firmly. On the other hand, if there is no particular problem with the mounting strength, the number of installation locations in the circumferential direction of the mounting holes 15a, 15b, 15c may be reduced to two.

<Embodiment 2>
When the heat insulating property required for the building is particularly high, a heat insulating material may be further applied to the back surface (upper surface) of the ceiling board PB. As a specific example, there is a construction example (spraying method) in which a heat insulating material made of urethane foam or the like is sprayed on the back surface of the ceiling board PB in a liquid state and expanded by self-foaming. Below, the structure of the inspection port apparatus suitable when constructing a heat insulating material by such a method is demonstrated as 2nd Embodiment of this invention.

  FIG. 13 is a cross-sectional view showing an inspection port device 1 ′ according to the second embodiment. In the figure, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 13, the inspection port apparatus 1 ′ of the present embodiment is different from the first embodiment in that a cylindrical extension member 50 is attached to the upper end portion of the frame 2 of the inspection port apparatus 1 ′. It is a point.

  The extension member 50 is made of, for example, expanded polystyrene or the like, and is formed in a relatively long cylindrical body that extends in the vertical direction. If the specific example of a dimension is given, when the height of the frame 2 is about 50 mm, the height of the said extension member 50 shall be about 340 mm.

  The extension member 50 has a tapered outer peripheral surface whose outer diameter decreases toward the top. Specifically, the extension member 50 has an outer diameter that is slightly larger than the inspection port 10 surrounded by the frame 2 only at the end portion on the large diameter side (lower side), and extends upward therefrom. As shown, the outer diameter of the extension member 50 is gradually reduced. Here, as described above, the peripheral wall portion 11 of the frame 2 surrounding the inspection port 10 is formed in a slightly constricted shape due to the draft, so that the width of the inspection port 10 (shown in FIG. 3) is increased. The upper end of the distance between the two flat plate portions 11b facing each other is the narrowest. On the other hand, the extension member 50 is formed such that only the lower end portion thereof has an outer diameter slightly larger than the upper end portion of the inspection port 10 (and an outer diameter smaller than the lower end portion of the inspection port 10), Most of the extension member 50 excluding the lower end portion is formed to have an outer diameter smaller than the upper end portion of the inspection port 10. Thereby, when the extension member 50 is inserted into the inspection port 10 from below, the outer peripheral surface of the lower end portion of the extension member 50 is brought into close contact with the upper end portion of the peripheral wall portion 11, and the extension member is caused by the adhesion force (friction force). 50 is fixed to the frame 2.

  On the back surface of the ceiling plate PB, a layer of the heat insulating material HS applied by the above-described spraying method is formed, and the thickness of the heat insulating material HS is such that the upper surface is lower than the upper end of the extension member 50. It is set to a valid value. That is, the extending member 50 is provided so as to penetrate the heat insulating material HS in the vertical direction.

  A hole 52 penetrating in the vertical direction is formed inside the extension member 50, and the hole 52 and the inspection port 10 of the frame body 2 are continuous in the vertical direction. For example, when the ceiling back S (the back side of the ceiling board PB and the heat insulating material HS) is inspected using a fiberscope or the like, the ceiling back S can be accessed through the inspection port 10 and the hole 52.

  Next, a procedure for attaching the inspection port device 1 ′ with the extension member 50 to the ceiling board PB will be described. It is assumed that the heat insulating material HS has not yet been applied to the back surface of the ceiling board PB before the attachment.

  First, the inspection port device 1 ′ excluding the extension member 50 is attached to the ceiling board PB by the same method as described in the first embodiment. At this time, the lid 4 is removed from the frame 2 and the inspection port 10 is opened. In this state, the extension member 50 is attached. Specifically, the extension member 50 is inserted into the inspection port 10 by bringing the extension member 50 closer to the frame body 2 from the bottom in a posture in which the small diameter side is up. Accordingly, most of the extension member 50 is pushed out to the upper side of the frame body 2 through the inspection port 10, while the lower end portion of the extension member 50 is fitted to the upper end portion of the peripheral wall portion 11 and the extension member 50 is fixed to the frame body 2. To do.

  After attaching the extending member 50 to the frame 2 as described above, the heat insulating material HS is applied to the back surface of the ceiling board PB. Specifically, a predetermined amount of liquid (for example, foamed urethane liquid) that is a material of the heat insulating material HS is sprayed on the back surface of the ceiling board PB and expanded by self-foaming, thereby increasing the thickness (extension member 50) as shown in FIG. The layer of the heat insulating material HS is formed so as not to exceed the upper end of the heat insulating material HS. At this time, in the process in which the heat insulating material HS expands, the extending member 50 is inserted into the heat insulating material HS, so that the extending member 50 is more stably fixed in place.

  In the second embodiment as described above, the extension member 50 is attached to the upper end portion of the frame body 2 so as to extend the frame body 2 upward. Therefore, the heat insulating material HS is applied to the back surface of the ceiling board PB. Even when the total thickness of the ceiling (the thickness of the ceiling plate PB and the heat insulating material HS) is considerably large as in the case of the case, the inspection port 10 of the frame 2 and the extension member 50 that is continuous with the inspection port 10 Through the hole 52, the ceiling back S can be easily accessed.

  Further, when the extension member 50 is inserted into the inspection port 10 from below, the outer peripheral surface of the extension member 50 is tapered so that the outer peripheral surface of the lower end portion of the extension member 50 is in close contact with the upper end portion of the peripheral wall portion 11. Therefore, the extension member 50 can be easily fixed to the frame 2 without particularly using a member such as a screw or a screw.

  In the second embodiment described above, a heat-insulating inner lid 54 indicated by an imaginary line in FIG. The inner lid 54 is made of, for example, a bag-like body enclosing glass wool, and is fixed by being press-fitted into the extension member 50. By attaching such an inner lid 54 to the extension member 50, the heat insulation of the ceiling board PB can be further enhanced. When inspecting the ceiling S, the lid member 4 is first removed, and then the inner lid 54 is removed from the extension member 50.

DESCRIPTION OF SYMBOLS 1 Inspection port apparatus 2 Frame body 3 Fastener 4 Cover material 10 Inspection port 11 Peripheral wall part 12 Flange part 15 (15a, 15b, 15c) Mounting hole 31 Base part 32 Press part 33 Upper surface part 33a 1st latching | locking part 33b 2nd Locking part 34 Folding part 50 Extension member 52 Hole of extension member PB Ceiling panel C Hole of ceiling board

Claims (6)

A frame that is fixed to the peripheral edge of a hole formed in the indoor ceiling plate and surrounds the inspection port for accessing the back side of the ceiling plate from the indoor, and a lid that is attached to the frame for opening and closing the inspection port An inspection port device comprising a material and a fastener that can be mounted from the inner diameter side in order to fix the frame body,
The frame body has a cylindrical peripheral wall portion extending in the vertical direction, and a flange portion protruding radially outward from the lower end portion of the peripheral wall portion,
Mounting holes that penetrate the peripheral wall portion in the radial direction are provided at a plurality of different height positions in the peripheral wall portion of the frame, and the fasteners are inserted into the mounting holes of any height from the radially inner side. Is possible,
The fastener has a pressing portion that protrudes radially outward of the peripheral wall portion in an inserted state and contacts the upper surface portion of the ceiling plate while elastically deforming at least in the vertical direction. Accordingly, the inspection opening device is characterized in that the frame body is fixed to the ceiling plate by sandwiching the ceiling plate between the pressing portion and the upper surface of the flange portion of the frame body. The inspection port device according to claim 1,
The fastener has a base portion arranged along the inner peripheral surface of the peripheral wall portion in a state where the pressing portion is inserted into the mounting hole of the peripheral wall portion,
The pressing portion has an upper surface portion that protrudes from the base portion to the radially outer side of the peripheral wall portion through the attachment hole, and a folded portion that is folded back from the tip of the upper surface portion and extends obliquely downward. An inspection port device, wherein a lower end portion is pressed against the ceiling plate. The inspection port device according to claim 2,
The upper surface portion of the pressing portion has a first locking portion and a second locking portion projecting upward at portions located on the radially inner side and the outer side of the peripheral wall portion, and the first and second locking portions. The inspection port device according to claim 1, wherein the locking portion has a function of preventing the fastener from falling off from the mounting hole by sandwiching an upper edge of the mounting hole therebetween. In the inspection opening device of any one of Claims 1-3,
An inspection port device, wherein at least a plurality of mounting holes are provided at intervals in the circumferential direction at a plurality of height positions of the peripheral wall portion. In the inspection opening device of any one of Claims 1-4,
It further comprises a cylindrical extension member surrounding a hole continuous with the inspection port,
The inspection port device according to claim 1, wherein the extension member is attachable to an upper end portion of the frame body so as to extend upward from the frame body. The inspection port device according to claim 5,
The extension member has a tapered outer peripheral surface whose outer diameter decreases toward the top so that the extension member can be inserted from below into the inspection port, and the outer periphery of the lower end portion of the extension member inserted into the inspection port The inspection port device according to claim 1, wherein the extension member is fixed to the frame body by closely contacting a surface with an upper end portion of the peripheral wall portion.

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