Ceiling ventilation material and ceiling inspection hatch cover

Abstract

To provide a ceiling ventilation material and a ceiling inspection port lid which can perform ventilation of a roof space without impairing appearance in a room, and can prevent falling of dust to an indoor side from a roof space side.SOLUTION: A ceiling ventilation material 50 includes a ventilation part 60 having a vent hole 80 for performing ventilation of a roof space (TU) side and an indoor (R) side, and a hood part 90 arranged above the vent hole 80 so as to cover the vent hole 80 in plan view. A ceiling inspection port lid 10 includes a lid body 20 arranged at a predetermined gap between a circumference of an inspection port 5 and the lid body 20 in a close state, and a ceiling ventilation material 50 mounted on the lid body 20 so as to be arranged at the predetermined gap.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a ceiling ventilation material and a ceiling inspection hatch cover that are arranged in an inspection hatch provided in a ceiling. [Background technology]

[0002] Inspection hatches are provided in the ceilings of buildings, houses, factories, and other structures to allow inspection, maintenance, and repair of air conditioning equipment, distribution boards, etc. Inspection hatches are equipped with lids and are usually kept closed. Therefore, the lids of the inspection hatches in the ceilings become part of the interior design of the room.

[0003] When the inspection hatch is closed with a cover, heat and moisture can build up in the attic, causing the temperature and humidity in the attic to rise abnormally. By ventilating the attic, you can prevent the temperature and humidity in the attic from rising abnormally.

[0004] Patent Document 1 discloses an inspection hatch structure in which a lid is disposed on an outer frame attached to an opening provided in a ceiling. In this inspection hatch structure, an opening portion within the outer frame functions as an inspection hatch in the ceiling. The lid is attached to the outer frame so that the inspection hatch can be opened and closed. The lid is composed of an inner frame disposed on the inner side of the outer frame and a plate-like body fitted into the inner frame. The plate-like body is configured in a louver shape with multiple vane-like baffles arranged side by side. According to this inspection hatch structure, even when the inspection hatch is closed by the lid, air can flow between the ceiling back side and the room side through the gaps between the adjacent vane-like baffles, and the ceiling back side can be ventilated. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2001-107551 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the inspection hatch structure of Patent Document 1 has the problem that the inside of the ceiling can be seen through the gaps between adjacent blade-shaped baffles, which spoils the aesthetics of the room. Also, the inspection hatch structure has the problem that dust and the like on the ceiling side falls into the room through the gaps between adjacent blade-shaped baffles.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a ceiling ventilation material and a ceiling inspection hatch cover that can ventilate the attic without compromising the aesthetic appearance of the room, and can prevent dust and the like from falling from the attic side into the room. [Means for solving the problem]

[0008] The characteristic configuration of the ceiling ventilation material according to the present invention to solve the above problems is as follows: A ceiling ventilation material provided at an inspection hatch provided in a ceiling, A ventilation section having a vent for ventilating between the ceiling back side and the room side; A hood portion is disposed above the ventilation hole so as to cover the ventilation hole in a plan view; The purpose of this project is to provide the following:

[0009] According to the ceiling ventilation material of this configuration, air can circulate between the ceiling back side and the room side through the vent of the ventilation part. The hood part is arranged above the vent so as to cover the vent in a plan view. Therefore, even if an attempt is made to look at the ceiling back side through the vent from the room side, the hood part will block the view. In addition, even if dust and the like on the ceiling back side tries to fall through the vent to the room side, it will be blocked by the hood part. Therefore, the ceiling back side can be ventilated without spoiling the aesthetic appearance of the room, and dust and the like can be prevented from falling from the ceiling back side to the room side.

[0010] In the ceiling ventilation material according to the present invention, The hood portion has a horizontal opening that opens horizontally on the underside of the ceiling, It is preferable that a surface of the hood portion facing the ventilation hole is formed in a shape that is curved upwardly convexly from the ventilation hole toward the horizontal opening.

[0011] With this ceiling ventilation material, the air circulating between the underside of the ceiling and the room side through the vent of the ventilation section flows smoothly along the surface of the hood section facing the vent, which is curved upwardly convexly from the vent of the ventilation section toward the horizontal opening of the hood section, thereby improving ventilation efficiency.

[0012] Next, the characteristic configuration of the ceiling inspection hatch according to the present invention for solving the above problem is as follows: A ceiling inspection hatch cover that can be freely opened and closed on an inspection hatch provided in a ceiling, A lid body that is disposed with a predetermined gap between itself and the periphery of the inspection hatch in a closed state; Any one of the above ceiling ventilation materials attached to the lid body so as to be disposed in the specified gap; The purpose of this project is to provide the following:

[0013] According to the ceiling inspection hatch cover of this configuration, air can flow between the ceiling back side and the room side through the vent of the ventilation part of any one of the above ceiling ventilation materials attached to the cover body. The hood part is arranged above the vent so as to cover the vent in a plan view. Therefore, even if an attempt is made to see the ceiling back side through the vent from the room side, it is blocked by the hood part. Also, even if dust, etc. on the ceiling back side tries to fall into the room through the vent, it is blocked by the hood part. Therefore, it is possible to ventilate the ceiling back side without spoiling the aesthetic appearance of the room, and it is possible to prevent dust, etc. from falling from the ceiling back side into the room. Furthermore, since the ceiling ventilation material attached to the lid body is provided separately from the lid body, between the inspection hatch in the ceiling and the lid body, the ceiling ventilation material itself catches the eye when looking up at the ceiling, and since the hood portion visible through the vent from inside the room is located in a dark place behind the ceiling, the back side of the vent appears dark, and the brightness of the vent and its surroundings contrast with each other, providing an accent to the interior decor and enhancing the beauty of the room.

[0014] In the ceiling inspection hatch according to the present invention, The predetermined gap is provided on both sides of the lid body, It is preferable that the ceiling ventilation material is attached to both sides of the lid body so as to be disposed in the specified gaps on both sides of the lid body.

[0015] With this ceiling inspection hatch cover, when the cover body is closed, the ceiling ventilation materials are arranged at a certain distance on both sides of the cover body, so that, for example, one of the ceiling ventilation materials can be made to function to preferentially flow air from the ceiling backside to the indoor side, and the other ceiling ventilation material can be made to preferentially flow air from the indoor side to the ceiling backside. This makes it possible to form a circulation path for air to circulate between the ceiling backside and the indoor side, further improving ventilation efficiency. [Brief description of the drawings]

[0016] [Figure 1]FIG. 1 shows a ceiling inspection hatch structure having a ceiling ventilation material and a ceiling inspection hatch cover according to one embodiment of the present invention, where (a) is a bottom oblique view of the ceiling inspection hatch cover in a closed state, and (b) is a bottom oblique view of the ceiling inspection hatch cover in an open state. [Diagram 2] FIG. 2 is a bottom view of a ceiling inspection hatch structure including a ceiling ventilation material and a ceiling inspection hatch cover according to one embodiment of the present invention. [Diagram 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 4 shows a ceiling inspection hatch cover according to one embodiment of the present invention, where (a) is an upper perspective view and (b) is a lower perspective view. [Diagram 5] FIG. 5 shows a ceiling ventilation material according to one embodiment of the present invention, where (a) is an upper perspective view and (b) is a lower perspective view. [Figure 6] FIG. 6 is a cross-sectional view taken along line BB in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the present invention will be described with reference to the drawings. However, the present invention is not intended to be limited to the embodiments described below or the configurations shown in the drawings.

[0018] <Overview of the ceiling access structure> Fig. 1 shows a ceiling inspection hatch structure equipped with a ceiling ventilation material and a ceiling inspection hatch lid according to one embodiment of the present invention, where (a) is a bottom perspective view of the ceiling inspection hatch lid in a closed state, and (b) is a bottom perspective view of the ceiling inspection hatch lid in an open state. The ceiling inspection hatch structure 1 shown in Figs. 1(a) and (b) includes a rectangular outer frame 3 that is fitted into an opening provided in a ceiling (T), and a ceiling inspection hatch lid 10 that is rectangular in bottom view and can be freely opened and closed and attached to an inspection hatch 5 in the ceiling, i.e., an opening portion within the frame of the outer frame 3. The outer frame 3 is preferably made of a highly rigid material such as metal.

[0019] As shown in Fig. 1(a), the outer frame 3 is composed of a pair of vertical frame parts 3a arranged in parallel with a certain distance therebetween, and a pair of horizontal frame parts 3b that are combined with the vertical frame parts 3a so as to form a right angle with the vertical frame parts 3a. The outer frame 3 is fixed to a joist (see Fig. 3; member indicated by the symbol "Y") that supports the ceiling (T).

[0020] The ceiling inspection hatch cover 10 shown in Figs. 1(a) and (b) is pivotally attached to one end of each of the pair of vertical frame parts 3a, and can be rotated around the pivotal attachment part (the engagement part between the pivot shaft 33 and the bearing part 35 described later) between a closed position in which the inspection hatch 5 is closed as shown in Fig. 1(a) and an open position in which the inspection hatch 5 is opened by hanging down to the room side as shown in Fig. 1(b). The ceiling inspection hatch structure 1 is equipped with a locking mechanism 7 for keeping the inspection hatch 5 closed when the ceiling inspection hatch cover 10 is in the closed position shown in Fig. 1(a). A known locking mechanism can be used as the locking mechanism 7, and the locking mechanism is configured to be released by a predetermined operation. The ceiling inspection hatch cover 10 can be rotated downward in the closed state shown in Fig. 1(a) to open the inspection hatch 5.

[0021] <Ceiling inspection hatch> FIG. 2 is a bottom view of a ceiling inspection hatch structure including a ceiling ventilation material and a ceiling inspection hatch lid according to an embodiment of the present invention. In the ceiling inspection hatch structure 1 shown in FIG. 2, the ceiling inspection hatch lid 10 (hereinafter, simply referred to as the "lid 10") includes a lid body 20 having a rectangular shape when viewed from the bottom, and a pair of ceiling ventilation materials 50. The ceiling ventilation materials 50 are preferably made of an elastic material such as resin. When the lid 10 is in a closed state, a predetermined gap S is provided between the lid body 20 and the periphery of the inspection hatch 5, and in this example, between the lid body 20 and the inner edges of the pair of vertical frame parts 3a. The pair of ceiling ventilation materials 50 are attached to both sides of the lid body 20 so as to be disposed in the predetermined gap S provided on both sides of the lid body 20 when the lid 10 is in a closed state.

[0022] <Lid body> The lid body 20 is composed of a rectangular inner frame 23 disposed on the inside of the outer frame 3, and a lid ceiling material 25 fitted into this inner frame 23. The inner frame 23 is preferably composed of a highly rigid material such as metal.

[0023] The inner frame 23 is configured by combining a pair of vertical frame parts 23a and a pair of horizontal frame parts 23b vertically and horizontally. The pair of vertical frame parts 23a are arranged parallel to the pair of vertical frame parts 3a of the outer frame 3 so that the above-mentioned predetermined gap S necessary for disposing the pair of ceiling ventilation materials 50 between the pair of vertical frame parts 3a of the outer frame 3 when the lid 10 is in the closed state is present. The pair of horizontal frame parts 23b are arranged parallel to the pair of horizontal frame parts 3b when the lid 10 is in the closed state so that a small gap (not shown) necessary for not interfering with the pair of horizontal frame parts 3b of the outer frame 3 is present when the lid 10 is opened or closed.

[0024] 3 is a cross-sectional view of line AA in FIG. 2. As shown in FIG. 3, an inward flange 27 is formed in a frame shape at the lower end of the inner frame 23 so as to protrude inside the frame, and an outward flange 29 is formed in a frame shape so as to protrude outside the frame. The inward flange 27 supports the lid ceiling material 25 fitted into the inner frame 23 from below. The outward flange 29 contributes to improving the aesthetic appearance by covering the butt joint between the inner frame 23 and the ceiling ventilation material 50. Meanwhile, an outward flange 9 is formed at the lower end of the outer frame 3 so as to protrude outside the frame. The outward flange 9 contributes to improving the aesthetic appearance by covering the peripheral portion of the opening in the ceiling in a frame shape.

[0025] FIG. 4 shows a ceiling inspection hatch cover according to an embodiment of the present invention, where (a) is an upper perspective view and (b) is a lower perspective view. In FIG. 4(b), a part of the ceiling material 25 for the lid is transparent. As shown in FIG. 4(a) and (b), a pivot shaft 33 is formed at one end of each of a pair of vertical frame parts 23a in the inner frame 23, protruding toward one end of each of a pair of vertical frame parts 3a in the corresponding outer frame 3. As shown in FIG. 3, the pivot shaft 33 is engaged with a bearing part 35 formed at one end of the vertical frame part 3a in the outer frame 3. In this way, the lid main body 20 is supported rotatably on the outer frame 3 with the engagement part between the pivot shaft 33 and the corresponding bearing part 35 as a fulcrum.

[0026] The lid ceiling material 25 shown in Fig. 4(b) is composed of a plate-like body with an external design similar to that of the ceiling material constituting the ceiling (T) around the outer frame 3 shown in Fig. 1(a). Note that the lid ceiling material 25 does not necessarily have to have the same external design as the ceiling material around the outer frame 3, and may have an external design different from that of the ceiling material around the outer frame 3 if desired from the viewpoint of the interior design.

[0027] <Ceiling ventilation material> Fig. 5 shows a ceiling ventilation member according to one embodiment of the present invention, where (a) is an upper perspective view and (b) is a lower perspective view. The ceiling ventilation member 50 shown in Figs. 5(a) and (b) is disposed at the inspection hatch 5 when the cover 10 is in the closed state (see Fig. 1(a)). The ceiling ventilation member 50 has a plurality of vertical side plate portions 61, 62 and a plurality of horizontal side plate portions 71-77.

[0028] The multiple vertical side plate portions 61, 62 include a first vertical side plate portion 61 and a second vertical side plate portion 62. The first vertical side plate portion 61 has a plate surface that contacts the vertical frame portion 23a of the inner frame 23 of the lid body 20 when the ceiling ventilation material 50 is attached to the lid body 20, and extends in the longitudinal direction of the vertical frame portion 23a for a length less than the length of the vertical frame portion 23a. On the other hand, the second vertical side plate portion 62 is longer than the first vertical side plate portion 61, is disposed opposite the first vertical side plate portion 61 at a predetermined interval, and extends for approximately the same length as the vertical frame portion 23a.

[0029] The multiple horizontal side plate portions 71 to 77 include a first horizontal side plate portion 71, a second horizontal side plate portion 72, and a third horizontal side plate portion 73. The first horizontal side plate portion 71 is integrally connected to one end of the second vertical side plate portion 62 so as to form a right angle with the second vertical side plate portion 62. When the ceiling ventilation material 50 is attached to the lid body 20, the second horizontal side plate portion 72 is located near the pivot shaft 33 (see FIGS. 4(a) and (b)) provided on the lid body 20, and is disposed opposite the first horizontal side plate portion 71 at a predetermined interval, and is integrally connected to the second vertical side plate portion 62. When the ceiling ventilation material 50 is attached to the lid body 20, the third horizontal side plate portion 73 is located near the pivot shaft 33 provided on the lid body 20, and is disposed opposite the second horizontal side plate portion 72 at a predetermined interval, and is integrally connected to the first vertical side plate portion 61 and the second vertical side plate portion 62. That is, the second lateral side plate portion 72 and the third lateral side plate portion 73 are positioned so as to sandwich the pivot shaft 33 in the radial direction when the ceiling ventilation material 50 is attached to the lid body 20. A shaft covering lid portion 78 is integrally provided on the lower sides of the second lateral side plate portion 72 and the third lateral side plate portion 73 so as to cover the pivot shaft 33 in a bottom view when the ceiling ventilation material 50 is attached to the lid body 20.

[0030] The multiple horizontal side plate portions 71 to 77 further include a fourth horizontal side plate portion 74, a fifth horizontal side plate portion 75, a sixth horizontal side plate portion 76, and a seventh horizontal side plate portion 77. The fourth horizontal side plate portion 74 is disposed opposite the third horizontal side plate portion 73 at a predetermined interval, and is integrally connected to the first vertical side plate portion 61 and the second vertical side plate portion 62. The fifth horizontal side plate portion 75 is disposed opposite the fourth horizontal side plate portion 74 at a predetermined interval, and is integrally connected to the first vertical side plate portion 61 and the second vertical side plate portion 62. The sixth horizontal side plate portion 76 is disposed opposite the fifth horizontal side plate portion 75 at a predetermined interval, and is integrally connected to the first vertical side plate portion 61 and the second vertical side plate portion 62. The seventh horizontal side plate portion 77 is arranged opposite the sixth horizontal side plate portion 76 with a predetermined distance therebetween, and is integrally connected to the other end of the second vertical side plate portion 62 so as to form a right angle with the second vertical side plate portion 62.

[0031] <Ventilation section> As shown in Figure 5 (b), in the ceiling ventilation material 50, a ventilation section 60 having a number of ventilation openings 81-85 for ventilating between the under-the-ceiling side and the inside of the room is formed by a number of vertical side panel portions 61, 62 and a number of horizontal side panel portions 71-77.

[0032] The multiple ventilation holes 81 to 85 include a first ventilation hole 81, a second ventilation hole 82, a third ventilation hole 83, a fourth ventilation hole 84, and a fifth ventilation hole 85.

[0033] The first ventilation opening 81 is defined by the first horizontal side plate portion 71, the second horizontal side plate portion 72, and the second vertical side plate portion 62. The opening between the first horizontal side plate portion 71 and the second horizontal side plate portion 72 in the ventilation portion 60 is closed by the vertical frame portion 23a of the inner frame 23 of the lid body 20 in a state in which the ceiling ventilation material 50 is attached to the lid body 20. Therefore, the first ventilation opening 81 is substantially a ventilation opening that opens in a rectangular shape when viewed from the bottom and is surrounded by the first horizontal side plate portion 71, the second horizontal side plate portion 72, the second vertical side plate portion 62, and the vertical frame portion 23a.

[0034] The second ventilation hole 82 is defined by the third horizontal side plate portion 73, the fourth horizontal side plate portion 74, the first vertical side plate portion 61, and the second vertical side plate portion 62. The third ventilation hole 83 is defined by the fourth horizontal side plate portion 74, the fifth horizontal side plate portion 75, the first vertical side plate portion 61, and the second vertical side plate portion 62. The fourth ventilation hole 84 is defined by the fifth horizontal side plate portion 75, the sixth horizontal side plate portion 76, the first vertical side plate portion 61, and the second vertical side plate portion 62.

[0035] The fifth ventilation opening 85 is defined by the sixth horizontal side plate portion 76, the seventh horizontal side plate portion 77, and the second vertical side plate portion 62. The opening between the sixth horizontal side plate portion 76 and the seventh horizontal side plate portion 77 in the ventilation portion 60 is closed by the vertical frame portion 23a of the inner frame 23 of the lid body 20 in a state in which the ceiling ventilation material 50 is attached to the lid body 20. Therefore, the fifth ventilation opening 85 is essentially a ventilation opening that opens in a rectangular shape in a bottom view and is surrounded by the sixth horizontal side plate portion 76, the seventh horizontal side plate portion 77, the second vertical side plate portion 62, and the vertical frame portion 23a.

[0036] 5(a), the ceiling ventilation material 50 further includes a plurality of overhanging portions 101 to 105. The plurality of overhanging portions 101 to 105 include a first overhanging portion 101, a second overhanging portion 102, a third overhanging portion 103, a fourth overhanging portion 104, and a fifth overhanging portion 105.

[0037] As shown in FIG. 5(b), the first overhanging portion 101 is disposed above the first ventilation opening 81 so as to cover the first ventilation opening 81 in a plan view, and the lower side is integrally connected to the second vertical side plate portion 62. The second overhanging portion 102 is disposed above the second ventilation opening 82 so as to cover the second ventilation opening 82 in a plan view, and the lower side is integrally connected to the second vertical side plate portion 62. The third overhanging portion 103 is disposed above the third ventilation opening 83 so as to cover the third ventilation opening 83 in a plan view, and the lower side is integrally connected to the second vertical side plate portion 62. The fourth overhanging portion 104 is disposed above the fourth ventilation opening 84 so as to cover the fourth ventilation opening 84 in a plan view, and the lower side is integrally connected to the second vertical side plate portion 62. The fifth overhanging portion 105 is disposed above the fifth ventilation hole 85 so as to cover the fifth ventilation hole 85 in a plan view, and its lower side is integrally connected to the second vertical side plate portion 62 .

[0038] <Hood section> In the ceiling ventilation material 50, a hood portion 90 is formed by a plurality of eave-shaped portions 101-105 and a plurality of lateral side panel portions 71-77, and is arranged above the plurality of ventilation openings 81-85 so as to cover the ventilation openings 81-85 in a plan view.

[0039] As shown in FIGS. 5( a ) and ( b ), the hood portion 90 includes a first hood portion 91 , a second hood portion 92 , a third hood portion 93 , a fourth hood portion 94 , and a fifth hood portion 95 .

[0040] As shown in FIG. 5(b), the first hood portion 91 is composed of a first horizontal side plate portion 71, a second horizontal side plate portion 72, and a first overhanging portion 101 that is integrally connected to the upper sides of these horizontal side plate portions 71, 72. The first hood portion 91 has a first horizontal opening 111. The first horizontal opening 111 is defined and formed by the first horizontal side plate portion 71, the second horizontal side plate portion 72, and the first overhanging portion 101. The opening between the first horizontal side plate portion 71 and the second horizontal side plate portion 72 in the ventilation portion 60 is closed by the vertical frame portion 23a of the inner frame 23 of the lid body 20 when the ceiling ventilation material 50 is attached to the lid body 20. Therefore, the first horizontal opening 111 is essentially a rectangular vent opening when viewed horizontally, surrounded by the first horizontal side panel portion 71, the second horizontal side panel portion 72, the first eave-shaped portion 101, and the vertical frame portion 23a, and opens horizontally toward the inside of the lid 10 on the under-the-ceiling side.

[0041] The second hood portion 92 is composed of the third horizontal side plate portion 73, the fourth horizontal side plate portion 74, and a second overhanging portion 102 that is integrally connected to the upper sides of these horizontal side plate portions 73, 74. The second hood portion 92 has a second horizontal opening 112. The second horizontal opening 112 is a vent hole that opens in a rectangular shape when viewed in the horizontal direction and is defined by the third horizontal side plate portion 73, the fourth horizontal side plate portion 74, the second overhanging portion 102, and the first vertical side plate portion 61, and opens horizontally toward the inside of the lid 10 on the underside of the ceiling.

[0042] The third hood portion 93 is composed of a fourth horizontal side plate portion 74, a fifth horizontal side plate portion 75, and a third overhanging portion 103 that is integrally connected to the upper sides of these horizontal side plate portions 74, 75. The third hood portion 93 has a third horizontal opening 113. The third horizontal opening 113 is a vent hole that opens in a rectangular shape when viewed in the horizontal direction and is defined by the fourth horizontal side plate portion 74, the fifth horizontal side plate portion 75, the third overhanging portion 103, and the first vertical side plate portion 61, and opens horizontally toward the inside of the lid 10 on the underside of the ceiling.

[0043] The fourth hood portion 94 is composed of a fifth horizontal side plate portion 75, a sixth horizontal side plate portion 76, and a fourth overhanging portion 104 that is integrally connected to the upper sides of these horizontal side plate portions 75, 76. The fourth hood portion 94 has a fourth horizontal opening 114. The fourth horizontal opening 114 is a vent hole that opens into a rectangular shape in a horizontal view and is defined by the fifth horizontal side plate portion 75, the sixth horizontal side plate portion 76, the fourth overhanging portion 104, and the first vertical side plate portion 61, and opens horizontally toward the inside of the lid 10 on the underside of the ceiling.

[0044] The fifth hood portion 95 is composed of a sixth horizontal side plate portion 76, a seventh horizontal side plate portion 77, and a fifth overhanging portion 105 that is integrally connected to the upper sides of these horizontal side plate portions 76, 77. The fifth hood portion 95 has a fifth horizontal opening 115. The fifth horizontal opening 115 is defined and formed by the sixth horizontal side plate portion 76, the seventh horizontal side plate portion 77, and the fifth overhanging portion 105. The opening between the sixth horizontal side plate portion 76 and the seventh horizontal side plate portion 77 in the ventilation portion 60 is closed by the vertical frame portion 23a of the inner frame 23 of the lid main body 20 when the ceiling ventilation material 50 is attached to the lid main body 20. Therefore, the fifth horizontal opening 115 is essentially a rectangular vent opening when viewed horizontally, surrounded by the sixth horizontal side panel portion 76, the seventh horizontal side panel portion 77, the fifth eave-shaped portion 105, and the vertical frame portion 23a, and opens horizontally toward the inside of the lid 10 on the under-the-ceiling side.

[0045] In the present embodiment, an example has been shown in which each of the hood portions 91-95 is constituted by each of the lateral side plate portions 71-77 and each of the eaves-shaped portions 101-105, but the present invention is not limited to this. In constituting each of the hood portions 91-95, each of the lateral side plate portions 71-77 is not an essential component but an optional component, and there is also a mode in which each of the hood portions 91-95 is constituted only by each of the eaves-shaped portions 101-105. Each of the hood portions 91-95 is disposed above each of the ventilation openings 81-85 and only needs to have the function of covering each of the ventilation openings 81-85 in a plan view.

[0046] In the following description, the ventilation openings 81 to 85 will be collectively referred to as "ventilation opening 80." Additionally, the horizontal openings 111 to 115 will be collectively referred to as "horizontal opening 110."

[0047] In this embodiment, the opposing surface 90a of the hood portion 90 (each of the overhanging portions 101 to 105) facing the vent 80 is formed in a shape that is curved upwardly convexly from the vent 80 toward the horizontal opening 110. Note that the opposing surface 90a is not limited to the curved surface shape of this example, and may be a horizontal surface shape that extends flat in the horizontal direction, or an inclined surface shape that slopes upward from the vent 80 toward the horizontal opening 110.

[0048] <Latching structure between ceiling ventilation material and cover body> 6 is a cross-sectional view of line BB in FIG. 4(a). In the ceiling ventilation material 50 shown in FIG. 6, the upper end of the first vertical side plate 61 has a required upper locking protrusion 121 protruding upward at a predetermined pitch in the longitudinal direction of the first vertical side plate 61, as shown in the enlarged view of the main part at the top of FIG. 6. Also, the lower end of the first vertical side plate 61 has a required lower locking protrusion 123 protruding downward at a predetermined pitch in the longitudinal direction of the first vertical side plate 61, as shown in the enlarged view of the main part at the bottom of FIG. 6. Meanwhile, in the inner frame 23 of the lid main body 20, the upper part of the vertical frame part 23a has an upper locking recess 125 corresponding to the upper locking protrusion 121, as shown in the enlarged view of the main part at the top of FIG. 6. Also, the lower part of the vertical frame part 23a has a lower locking recess 127 corresponding to the lower locking protrusion 123, as shown in the enlarged view of the main part at the bottom of FIG. 6.

[0049] The ceiling ventilation material 50 is attached to the lid body 20, for example, as follows. First, the lower locking protrusion 123 provided on the ceiling ventilation material 50 is fitted into the lower locking recess 127 provided on the lid body 20. Next, the ceiling ventilation material 50 is pressed against the inner frame 23, using the mating portion between the lower locking protrusion 123 and the lower locking recess 127 as a fulcrum, so that the first vertical side panel portion 61 contacts the vertical frame portion 23a. At this time, the upper locking protrusion 121 provided on the ceiling ventilation material 50 abuts against the portion constituting the upper locking recess 125 provided on the lid body 20, and when the pressing operation of the ceiling ventilation material 50 is continued, the ceiling ventilation material 50 elastically deforms, and then, when the upper locking protrusion 121 is pushed to a position corresponding to the upper locking recess 125, the ceiling ventilation material 50 returns to its original shape, and the upper locking protrusion 121 fits into the upper locking recess 125. As a result, the upper locking protrusion 121 and the lower locking protrusion 123 are engaged with the upper locking recess 125 and the lower locking recess 127. In this way, the ceiling ventilation material 50 is locked to the lid body 20 so that the ceiling ventilation material 50 will not come off from the lid body 20 unless a pulling force of a predetermined value or more is intentionally applied to the ceiling ventilation material 50.

[0050] In the ceiling inspection hatch structure 1 configured as described above, the lid 10 is normally in a closed state as shown in FIG. 1(a). When inspecting, maintaining, repairing, etc. an air conditioner, distribution board, etc. disposed above the ceiling, the locking mechanism 7 is unlocked to open the lid 10 as shown in FIG. 1(b) and open the inspection hatch 5. In this way, a worker can inspect, maintain, repair, etc. an air conditioner, distribution board, etc. disposed above the ceiling through the inspection hatch 5. When the inspection, maintenance, repair, etc. is completed, the lid 10 is closed as shown in FIG. 1(a) and locked by the locking mechanism 7 to keep the inspection hatch 5 closed.

[0051] As shown in Figure 3, in the ceiling inspection hatch structure 1, even when the inspection hatch 5 (the opening within the frame of the outer frame 3) is closed by the lid 10, air can circulate between the attic (TU) side and the room (R) side through the vent 80 of the ventilation section 60 and the horizontal opening 110 of the hood section 90 in the ceiling ventilation material 50 attached to the lid body 20. This prevents heat and moisture from building up in the attic, ventilates the attic side, and makes it possible to prevent abnormal increases in temperature and humidity in the attic.

[0052] In the ceiling ventilation member 50, the air circulating between the ceiling back side and the room side through the vent 80 and the horizontal opening 110 flows smoothly along the opposing surface 90a that is formed in an upwardly convex curved shape from the vent 80 toward the horizontal opening 110. Therefore, the ventilation efficiency can be improved.

[0053] In this embodiment, the horizontal opening 110 opens horizontally toward the inside of the lid 10 on the ceiling side. Since there is nothing obstructing ventilation on the inside of the lid 10, air flows smoothly through the horizontal opening 110. If the horizontal opening 110 opens horizontally toward the outside of the lid 10 on the ceiling side, there is a risk that the joist (see FIG. 3; member indicated by the symbol "Y") will obstruct ventilation. Therefore, it is preferable that the horizontal opening 110 opens horizontally toward the inside of the lid 10 on the ceiling side. Of course, if there is no problem of obstructing ventilation, the horizontal opening 110 may be opened horizontally toward the outside of the lid 10 on the ceiling side.

[0054] In the lid 10 closing the inspection hatch 5 (the opening within the frame of the outer frame 3), one of the ceiling ventilation materials 50 attached to both sides of the lid body 20 (for example, the ceiling ventilation material 50 on the left side in FIG. 3) can be made to function to preferentially flow air on the ceiling space (TU) side to the room (R) side, and the other ceiling ventilation material 50 (for example, the ceiling ventilation material 50 on the right side in FIG. 3) can be made to preferentially flow air on the room (R) side to the ceiling space (TU). This makes it possible to form a circulation path for air to circulate between the ceiling space and the room side, further improving ventilation efficiency.

[0055] A hood section 90 is connected to the ventilation section 60 so as to cover the ventilation opening 80 in a plan view. Therefore, even if an attempt is made to look at the ceiling space (TU) side through the ventilation opening 80 from the indoor (R) side directly below the inspection hatch 5, the view will be blocked by the hood section 90. Also, even if dust and the like on the ceiling space (TU) side attempts to fall from directly above the lid 10 through the ventilation opening 80 to the indoor (R) side, the view will be blocked by the hood section 90. Therefore, the ceiling space can be ventilated without impairing the aesthetic appearance of the room, and dust and the like can be prevented from falling from the ceiling space side to the indoor side.

[0056] Furthermore, in the lid 10, the ceiling ventilation material 50 attached to the lid body 20 is provided separately from the lid body 20, between the inner opening portion of the outer frame 3 that forms the inspection hatch 5 in the ceiling (T) and the lid body 20. Therefore, the ceiling ventilation material 50 itself catches the eye when looking up at the ceiling (T). In addition, since the hood portion 90 that can be seen through the vent 80 from the indoor (R) side is located in a dark place on the attic (TU) side, the back side of the vent 80 appears dark, and the brightness of the vent 80 and its surroundings complement each other, providing an accent for the interior design and enhancing the beauty of the room.

[0057] The above describes the ceiling ventilation material and ceiling inspection hatch cover of the present invention based on one embodiment, but the present invention is not limited to the configuration described in the above embodiment, and the configuration can be changed as appropriate within the scope of the spirit of the present invention. [Industrial Applicability]

[0058] The ceiling ventilation material and ceiling inspection hatch cover of the present invention can be used, for example, by attaching them to inspection hatches installed in the ceiling of buildings such as buildings, houses, factories, etc., for inspecting, maintaining, repairing air conditioning equipment, distribution boards, etc., to ventilate the ceiling. [Explanation of symbols]

[0059] 10 Ceiling Inspection Cover 20 Lid body 50 Ceiling ventilation material 60 Ventilation section 80 Vent 90 Hood section 110 Horizontal opening

Claims

1. A ceiling ventilation material attached to a cover body that is rotatably arranged around a pivot part including a pivot shaft at an inspection hatch provided in a ceiling, A ventilation section having a vent for ventilating between the ceiling back side and the room side; A hood portion is disposed above the ventilation hole so as to cover the ventilation hole in a plan view; A shaft cover portion provided to cover the pivot shaft in a bottom view; Ceiling ventilation material equipped with.

2. The hood portion has a horizontal opening that opens horizontally on the underside of the ceiling, 2. The ceiling ventilation member according to claim 1, wherein a surface of the hood portion facing the vent hole is formed in an upwardly convex curved shape from the vent hole toward the horizontal opening.

3. A ceiling inspection hatch cover that can be freely opened and closed on an inspection hatch provided in a ceiling, a cover body that is disposed with a predetermined gap between itself and the periphery of the inspection hatch in a closed state and that is rotatable about a pivot point that includes a pivot shaft on the inspection hatch; 3. The ceiling ventilation material according to claim 1 or 2, which is attached to the lid body so as to be disposed in the predetermined gap and covers the pivot shaft with the shaft covering lid part in a bottom view; A ceiling inspection hatch is provided.

4. The predetermined gap is provided on both sides of the lid body, The ceiling inspection hatch cover according to claim 3, wherein the ceiling ventilation material is attached to both sides of the lid body so as to be disposed in the specified gap on both sides of the lid body.

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