JP4839261B2 - Ceiling inspection opening / closing device - Google Patents

Description

  The present invention relates to an opening / closing device for a ceiling inspection port. More specifically, the present invention relates to a ceiling inspection port opening / closing device including a frame fixed to the ceiling and a door connected to the frame so as to open and close the ceiling inspection port surrounded by the frame.

2. Description of the Related Art Conventionally, as an apparatus for opening and closing a ceiling inspection port provided for inspection of a ceiling, for example, a device described in Patent Document 1 is known. An outline of this apparatus is shown in FIG. The ceiling inspection opening / closing device 200 includes a frame 2, a door 3, and arms 41 and 42 that are respectively provided on the left and right. The frame 2 is mounted along the periphery of the hole P formed in the ceiling C and surrounds the ceiling inspection port. The door 3 is connected to the frame body 2 via the arms 41 and 42 so as to open and close the ceiling inspection port. The arms 41 and 42 are for connecting the frame body 2 and the door 3 and restricting the opening / closing operation of the door 3, and one end of each arm 41, 42 is rotated via a rotation shaft. The other end of each of the arms 41 and 42 is also directly attached to the door 3 so as to be rotatable via a rotation shaft. The door 3 includes a frame 31 having a shape that can be fitted into a ceiling inspection port surrounded by the frame body 2, and a contact piece 31 a that protrudes outward from the frame 31 over the entire circumference. The contact piece 31a has a function of improving airtightness by contacting the lower surface of the frame body 2 when the door 3 is closed. The arms 41 and 42 constitute a link mechanism that connects the frame body 2 and the door 3 so that the door 3 opens and closes while avoiding the contact piece 31 a from interfering with the frame body 2.
JP 52-11624 A

  As a method of mounting the conventional ceiling inspection opening / closing device 200 in the hole P formed in the ceiling, the frame 2 and the door 3 are integrated in advance in a factory or the like and the opening / closing device is mounted on the ceiling C. First, there is a method in which only the frame 2 is fixed to the ceiling first, and the door 3 integrated with the arms 41 and 42 is connected to the frame 2 later.

  However, when the opening / closing device 200 is attached to the ceiling C with the frame 2 and the door 3 in an integrated state in advance, the attachment work must be performed while supporting the total weight of the frame 2 and the door 3. In addition, there is a drawback that the door 3 obstructs the work of attaching the frame body 2 to the ceiling at the time of mounting.

  Further, in the method in which the door 3 is directly connected to the frame body 2 after the frame body 2 is attached to the ceiling, the work of connecting the respective ends of the plurality of arms to the frame body 2 so as to be rotatable is entirely performed on the ceiling C. It must be done at a special work place that is difficult to reach at a high location on the side.

  The present invention has been made in view of the circumstances as described above, and an object thereof is to provide an opening / closing device for a ceiling inspection port that can be easily mounted on a ceiling.

  The present invention is fixed to the ceiling along the periphery of a hole formed in the ceiling, and surrounds the inspection body, a door for opening and closing the inspection opening, and the door does not interfere with the frame when opening and closing. The ceiling inspection port opening and closing device having a connecting portion for connecting the door to the frame body, wherein the connecting portion is interposed between the frame body and the door, and one end is A plurality of arms rotatably connected to the door and the other end of each arm are rotatably connected to each other, and the first attachment is detachable from the frame body in the connected state. Member. With this configuration, the above object is achieved.

  In addition, an engagement hole is provided in one of the frame body and the first attachment member, and a protruding portion to be inserted into the engagement hole is provided in the other, and the engagement hole An insertion portion having a shape in which the portion can be inserted and removed, and a locking portion having a shape that prevents the protrusion inserted into the engagement hole from being detached from the engagement hole, and the insertion portion It is preferable to have a shape that allows the projecting portion inserted into the transition to the locking portion.

  Moreover, it is preferable that the said engagement hole has a shape where the said protrusion part inserted in the said insertion part transfers to the said latching | locking part along the longitudinal direction of the said frame.

  Further, the frame body has a rib protruding inward from an inner side surface thereof and extending in a longitudinal direction of the frame body, and the first attachment member is supported on the rib while the rib It is preferable that the protruding portion shifts from the insertion portion to the locking portion by the slide.

  The frame body has a rib protruding inward from the inside thereof and extending in a longitudinal direction of the frame body, and the first attachment member is supported on the rib in the state where the frame body is supported. It is preferable that it is attached to.

  Moreover, it is preferable that the said frame and the said door are formed of aluminum alloy, and the said connection part is formed of steel materials.

  Moreover, it is preferable that the other end of each arm is connected to each other so as to be rotatable, and includes a second attachment member fixed to the door in the connected state.

  The door has a shape having a plurality of corners, and the second mounting member has a shape that covers both outer surfaces sandwiching a specific corner of the door corners from the outside, and the outer surface It is preferable to fix to each.

  According to the opening and closing device for the ceiling inspection port according to the first aspect of the present invention, since only the frame body needs to be mounted along the periphery of the hole formed in the ceiling, the operator mounts the frame body. There is no need to support the weight of the door. In addition, since the end portions of the plurality of arms are connected in advance to the common first mounting member, the connecting portion and the door can be easily connected to the frame simply by mounting the first mounting member on the frame. can do.

  According to the opening and closing device for the ceiling inspection port according to claim 2, the protruding portion provided on the other side is provided on the insertion portion of the engagement hole provided on one of the frame and the first attachment member. The first attachment member can be locked to the frame body by a simple operation of inserting and shifting the protrusion as it is from the insertion portion to the locking portion.

  According to the opening and closing device for the ceiling inspection port according to claim 3, since the engagement hole has a shape in which the protruding portion inserted into the insertion portion moves to the locking portion along the longitudinal direction of the frame body. The transition stroke of the protruding portion can be sufficiently ensured by utilizing the large dimension in the longitudinal direction of the frame.

  In particular, according to the ceiling inspection port opening and closing device of claim 4, the frame has a rib, and the first mounting member is shaped to be slidable along the rib while being supported on the rib. Since the projecting portion shifts from the insertion portion to the locking portion by this slide, the first attachment member can be guided using the rib effectively, and the first attachment member It can prevent more reliably falling off from the frame.

  According to the ceiling inspection port opening and closing device of claim 5, the first attachment member is attached to the frame while being supported on the rib, thereby preventing the first attachment member from falling off. can do.

  Further, according to the opening and closing device for the ceiling inspection port according to claim 6, the frame and the door are formed of an aluminum alloy, and the connecting portion is formed of a steel material. It is possible to sufficiently secure the strength of the connecting portion having a large strength burden.

  According to the opening and closing device for the ceiling inspection port according to claim 7, the other end of each arm is rotatably connected, and the second attachment member fixed to the door in the connected state is provided. As a result, the door can be easily assembled in a factory or the like.

  According to the opening and closing device for the ceiling inspection port according to claim 8, the second mounting member has a shape that covers both outer surfaces sandwiching a specific corner of the door corners from the outside, Since it is fixed, the deformation of the door, in particular, the change in the angle of the corner can be effectively suppressed.

  The opening / closing device for a ceiling inspection port according to the present invention is fixed to the ceiling along the periphery of a hole formed in the ceiling, and includes a frame surrounding the inspection port, a door for opening / closing the inspection port, and a door when opening / closing. And a connecting portion for connecting the door to the frame so as not to interfere with the frame. In particular, a connecting portion is interposed between the frame body and the door, and one end is rotatably connected to the door, and the other end of each arm is rotatably connected. And it has the 1st attachment member which can be attached or detached to a frame with the connection state. That is, the opening / closing device for the ceiling inspection port according to the present invention is configured such that when the opening / closing device is attached to the hole formed in the ceiling, the first attachment member is fitted to the frame to attach the frame, the connecting portion, and the door. It is one thing.

  Hereinafter, an opening / closing device for a ceiling inspection port according to the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a perspective view for explaining an opening / closing device 100 for a ceiling inspection port according to the first embodiment. As shown in FIG. 1, a ceiling inspection opening / closing device 100 according to the first embodiment includes a frame 2 fixed to the ceiling, and a door 3 for opening and closing the ceiling inspection opening surrounded by the frame 2. And the connection part 4 for connecting the frame 2 and the door 3 integrally.

  FIG. 2 is a perspective view for explaining the frame 2 of the first embodiment. The frame 2 has a mounting portion 21 as shown in FIG. The mounting portion 21 has a shape that can be arranged along the side edge of the square hole P formed in the ceiling C. That is, the mounting portion 21 has a square frame shape. As shown in FIG. 3, the mounting portion 21 is fixed to the base material constructed on the ceiling C using the hanging metal fitting 7. Specifically, a plate-like member provided at the lower portion of the hanging metal fitting 7 is fitted inside the mounting portion 21. A bolt 71 is screwed into a screw hole formed in the upper part of the hanging metal fitting 7. Furthermore, the lower end of the bolt 71 is pressed against the bottom surface of the cross-sectional channel-shaped receiving device 9 provided on the field edge 8, and the frame body 2 is fixed to the ceiling C.

  Reinforcing ribs 21b are formed on the mounting portion 21. The rib 21 b protrudes inward from the inner surface of the mounting portion 21 and extends over the entire circumference along the longitudinal direction of the mounting portion 21. The rib 21b is originally intended to increase the rigidity of the frame 2, but in the present invention, in addition to its reinforcing function, it supports and fixes a first mounting member 45 described later or a reinforcing member 23 described later. It also has a function.

  A contact piece 21 c is formed on the mounting portion 21. The contact piece 21c is for ensuring airtightness between the frame body 2 and the side edge of the ceiling C, and outward from the outer peripheral surface of the mounting portion 21 over the entire circumference of the mounting portion 21. Projected. An airtight material 22 made of an elastic material such as rubber is adhered to the upper surface of the mounting portion 21 over the entire circumference, and the airtight material 22 is in close contact with the lower surface of the peripheral edge portion of the hole P in the ceiling C. Airtightness when the door 3 is closed is ensured.

  Reinforcing members 23 for increasing the rigidity are fixed to the four corners of the mounting portion 21.

  The door 3 includes a frame 31 as shown in FIG. 4 and a panel clamping member 34. FIG. 4 is a perspective view showing a state in which the connecting portion 4 is fixed to the door 3.

  The frame 31 has a square frame shape and has a size that can be fitted inside the frame body 2. Ribs 31b project outwardly from the upper and lower side edges of the outer surface of the frame 31. The rib 31b is originally a reinforcing material for increasing the rigidity of the door 3. In addition to its original reinforcing function, the rib 31b has a function of supporting and fixing a second mounting member 46 described later and a reinforcing material 33 described later. Also have.

  A panel serving as a ceiling plate is attached to the frame 31 so as to close the opening. The frame 31 is formed with panel mounting ribs 31e for supporting the panel. The panel mounting rib 31 e protrudes inward from the inner surface of the frame 31 and extends along the longitudinal direction of the frame 31. An airtight member 32b is fixed to the upper surface of the panel mounting rib 31e. The airtight member 32b is formed of an elastic material such as rubber and is in close contact with the panel.

  The panel clamping member 34 is a thin plate-like member, and is disposed at four positions so as to sandwich the corners inside the frame 31, so that the panel thickness between the panel mounting ribs 31e is reduced. Hold from the direction. These panel holding members 34 have upright portions 34 a bent 90 degrees so as to abut against the frame 31. In the upright portion 34 a, a hole for screwing the screw 31 d is formed in order to attach the panel holding member 34 to the frame 31.

  A contact piece 31 a is formed at the lower part of the frame 31 so as to cover the lower surface of the contact piece 21 c of the frame 2. The contact piece 31a is for sealing a gap between the frame 2 and the door 3 when the door 3 is closed. The contact piece 31 a is provided so as to protrude outward from the outer surface of the frame 31 over the entire circumference of the frame 31. The contact piece 31a extends to the outside from the outer edge of the contact piece 21c provided on the frame 2.

  An airtight member 32a is fixed to the upper surface of the contact piece 31a over the entire circumference. The airtight member 32 a seals between the frame 2 and the door 3 by being in close contact with the lower surface of the frame 2.

  The frame 31 is formed with a total of eight long holes 31c extending in the vertical direction of the frame 31 (direction perpendicular to the longitudinal direction of the frame 31), two on each side. The long hole 31 c is formed to attach the panel holding member 34 to the frame 31.

  In installing the panel holding member 34, the screw 31d is inserted into the long hole 31c formed in the frame 31, and the screw 31d is screwed into the hole of the upright portion 34a. Thus, by installing the panel holding member 34 using the long hole 31c formed in the frame 31, the panel holding member 34 is moved in the longitudinal direction of the long hole 31c (that is, in the vertical direction of the frame 31). It is possible to flexibly cope with changes in the panel thickness.

  5A and 5B are perspective views for explaining the connecting portion 4 of the first embodiment. FIG. 5A shows the inside of the connecting portion 4 and FIG. 5B shows the outside of the connecting portion 4. As shown in FIG. 4, the connecting portion 4 is connected to the left and right two portions of the door 3. As shown in FIGS. 4, 5A and 5B, each connecting portion 4 includes a first arm 41 and a second arm 42, which are a pair of arms, and a first arm 41 and a second arm. A first attachment member 45 connected to the arm 42 and detachable from the frame 2, and a second attachment member 46 connected to the first arm 41 and the second arm 42 and fixed to the door 3. It consists of and.

  One end of each of the first arm 41 and the second arm 42 is rotatably connected to the first mounting member 45, and the other end thereof is rotatable to the second mounting member 46. Connected. Specifically, the end portions of the first arm 41 and the second arm 42 are spaced from the first mounting member 45 or the second mounting member 46 with a gap between the first arm 41 and the second arm 42. It is connected. Further, the interval between the end portions of the first arm 41 and the second arm 42 on the first attachment member 45 side is wider than the interval between the end portions of the first arm 41 and the second arm 42 on the second attachment member 46 side. It is attached (the length of the arm is shorter in the first arm 41 than in the second arm 42). Even when the door 3 is completely opened (90 degrees with respect to the frame 2, see FIG. 11), the first arm 41 and the second arm 42 are separated from the second mounting member 46. Since the location is supported, the fixing strength between the door 3 and the arms 41 and 42 can be improved. These attachment members 45 and 46 and both arms 41 and 42 constitute a link mechanism for causing the door 3 to open and close with respect to the frame 2. By connecting the frame body 2 and the door 3 using the pair of arms 41 and 42, one arm controls the other arm, so that the door 3 does not drop suddenly when the door is opened. Further, unlike the case of connecting the frame 2 and the door 3 using a single arm, when closing the door 3, it is sufficient to lock only the end opposite to the side where the connecting portion 4 is provided, There is no fear of dropping even if the connecting part 4 side is not locked.

  The first attachment members 45 are respectively attached to and detached from predetermined positions on the left and right of the mounting portion 21b in the frame body 2. The first attachment member 45 is a substantially rectangular plate material, and a protruding portion 47 is provided on the outer surface thereof. The protruding portion 47 has a shape in which a large diameter portion 47a having a diameter larger than the diameter of the small diameter portion 47b is provided at the tip of the cylindrical small diameter portion 47b. The large-diameter portion 47a is engaged with the frame body 2 when the protruding portion 47 shifts to a locking portion 62 of an engaging hole 6 described later formed in the frame body 2, and the protruding portion 47 is engaged with the engaging hole. Prevents you from leaving 6. The small-diameter portion 47 b protrudes from the first attachment member 45 by a length substantially the same as the plate thickness of the mounting portion 21 of the frame body 2. Since the distance between the large-diameter portion 47a of the projecting portion 47 and the first mounting member 45 is set, the first mounting member 45 is brought into close contact with the inner surface of the mounting portion 21 of the frame 2 at the time of connection. Can be touched. Thereby, it is possible to prevent the first mounting member 45 from rattling when the opening / closing device 100 is used. Further, as described above, when the first mounting member 45 is connected to the frame body 2, the first mounting member 45 is slid. In this sliding, the traveling direction of the first mounting member 45 is A substantially U-shaped cutout 45b is formed in a portion that becomes the front side edge. The notch 45 b engages with the screw 24 a of the locking tool 24 provided on the frame body 2. The locking tool 24 is provided on two opposing sides on the mounting portion 21. The locking tool 24 is fixed by the screw 24a so as to come into contact with the outer surface of the mounting part 21 and the screw 24a screwed into a hole formed in the mounting part 21 from the inner side to the outer side of the mounting part 21. And a fastening plate 24b (see FIGS. 1 and 2). The screw 24 a of the locking tool 24 engages with a notch 45 b formed in the first attachment member 45 when the first attachment member 45 is connected to the frame body 2. Further, when the screw 24 a is tightened in a state where the screw 24 a is engaged with the first mounting member 45, the first mounting member 45 is firmly connected to the frame body 2. The first attachment member 45 is formed with holes for allowing the first arm rotation shaft 43b and the second arm rotation shaft 44b to pass therethrough at two locations. The 1st arm 41 and the 2nd arm 42 are connected with the opposite surface of the side from which the protrusion part 47 protrudes.

  Further, the mounting portion 21 is formed with an engagement hole 6 into which a part of the first attachment member 45 (a protrusion 47 described later) is fitted. FIG. 6 is a view for explaining the engagement hole 6 formed in the frame body 2. The engagement holes 6 are formed at two opposing positions of the mounting portion 21. The engagement hole 6 includes an insertion portion 61 having a shape in which the protrusion 47 can be inserted and removed, and an engagement portion 6 having a shape that prevents the protrusion 47 inserted in the engagement hole 6 from being detached from the engagement hole 6. And a stop 62. In addition, the engagement hole 6 has a shape that allows the protruding portion inserted into the insertion portion 61 to shift to the locking portion 62. Specifically, as shown in FIG. 6, the engagement hole 6 is formed by arranging two large and small circles so that a straight line connecting the centers of the two large and small circles is parallel to the longitudinal direction of the mounting portion 21. The hole has a shape in which two large and small circles are connected by two tangents parallel to a straight line connecting the centers of the circles. In this case, the large circular hole becomes the insertion portion 61 and the small circular hole becomes the locking portion 62. The diameter of the great circle (insertion portion 61) is slightly larger than the diameter of the large diameter portion 47a of the protruding portion 47. Further, the diameter of the small circle (the locking portion 62) is slightly larger than the small diameter portion 47b of the protruding portion 47 and smaller than the diameter of the large diameter portion 47a. As a result, when the protruding portion 47 shifts from the insertion portion 61 to the locking portion 62, the large diameter portion 47 a is engaged with the mounting portion 21 of the frame body 2, and the protruding portion 47 is released from the engaging hole 6. Can be blocked.

  By providing the first attachment member 45, it is not necessary to directly connect the first arm 41 and the second arm 42 to the frame body 2. That is, the frame body 2, the connecting portion 4, and the door 3 can be integrated by simply fitting the first mounting member 45 to the frame body 2 and sliding the first mounting member 45 somewhat.

  The second attachment member 46 is fixed to the door 3, and the other ends of the first arm 41 and the second arm 42 are rotatably connected to the second attachment member 46. The second attachment member 46 has a substantially L shape, and is fixed to the door 3 so as to cover both outer surfaces sandwiching a specific corner among the corners of the door 3 from the outside. Thereby, the deformation | transformation of the door 3, especially the change of the angle of an angle | corner can be suppressed effectively. For example, in the case of FIG. 4, the second attachment member 46 is disposed outside the two adjacent corners of the frame body 2, and the rib 31 b formed on the door 3 is caulked (specifically, the door 3 The second attachment member 46 is disposed between the frame 31 and the rib 31b, and a part of the rib 31b is struck to be plastically deformed, and the second attachment member 46 is interposed between the rib 31b and the frame 31. The second mounting member 46 is fixed to the door 3 by clamping. By attaching the substantially L-shaped second attachment member 46 to the corner of the door 3, the strength of the frame 31 can be improved. By improving the strength of the frame 31, the load on the first arm 41 and the second arm 42 accompanying the deformation of the frame 31 can be reduced. Further, in order to easily fix the second mounting member 46 with the ribs 31b, several substantially concave cuts may be formed in the upper edge and the lower edge of the second mounting member 46. The second attachment member 46 is fixed by caulking the rib 21b so as to fit into the notch. The second mounting member 46 is fixed to the door 3 together with the first arm 41 and the second arm 42 in a factory or the like at the manufacturing stage of the door 3. Thus, if the connection part 4 is fixed to the door 3 via the 2nd attachment member 46, the assembly operation | work which connects the door 3 and the connection part 4 in a factory etc. will become easy. The second attachment member 46 is formed with holes for allowing the first arm rotation shaft 43a and the second arm rotation shaft 44a to pass therethrough at the two locations. The first arm 41 and the second arm 42 are connected to the outer surface of the second mounting member 46 (the surface opposite to the surface in contact with the frame 31) (see FIG. 5B). Further, reinforcing members 33 for increasing the rigidity of the frame 31 are fixed to two corners where the second attachment member 46 of the frame 31 is not fixed. The reinforcing member 33 has a shape (substantially L-shaped) that covers both outer surfaces sandwiching the corners of the frame 31 from the outside. The reinforcing member 33 is disposed outside two adjacent corners of the frame 31 and is sandwiched between the frame 31 and the rib 31b.

  FIG. 7 is a cross-sectional view for explaining that the connecting portion 4 is located between the frame body 2 and the door 3. As shown in FIG. 7, the first attachment member 45 is attached so as to contact the inner surface of the mounting portion 21 of the frame body 2, and the second attachment member 46 is attached to the outer surface of the frame 31 of the door 3. It is attached to touch. FIG. 8 is a view for explaining the state of the link mechanism of the connecting portion 4, in which the position of AA in FIG. 7 is cut with the door 3 closed. As shown in FIG. 8, when the door 3 is closed, the connecting portion 4 is stored between the mounting portion 21 and the frame 31.

  Here, the structure of the connection part 4 is demonstrated concretely. In addition to the first arm 41, the second arm 42, the first attachment member 45, and the second attachment member 46, the connecting portion 4 includes a first arm rotation shaft 43a for supporting both ends of the first arm 41. 43b and second arm rotation shafts 44a and 44b for supporting both ends of the second arm 42. As the first arm rotation shafts 43a and 43b and the second arm rotation shafts 44a and 44b, in particular, the first arm rotation shafts 43a and 43b and the second arm rotation shafts 44a and 44b can be used. It is not limited. In particular, in the present invention, as shown in FIG. 7, detachable rivets can be used as the first arm rotation shafts 43a and 43b and the second arm rotation shafts 44a and 44b. The first mounting member 45 or the second mounting member 46, and the first arm 41 and the second arm 42 can be pivoted more firmly than when a possible screw or the like is used as the rotation shaft.

  Moreover, it is preferable that the connection part 4 is formed with the steel material. Since the frame 2 and the door 3 are made of an aluminum alloy and the connecting portion 4 is made of steel, an increase in weight of the switchgear 100 as a whole can be avoided, while the strength of the connecting portion 4 having a particularly strong burden is increased. It can be secured sufficiently. Further, since the first mounting member 45 is in contact with the frame body 2, the aluminum alloy frame body 2 is reinforced with the steel material of the first mounting member 45, and distortion of the frame body 2 is prevented. can do.

  Here, the fastener 5 will be described in detail. The fastener 5 is for preventing the door 3 from being detached from the frame body 2. 9A and 9B are perspective views for explaining the fastener 5 according to the first embodiment, where FIG. 9A shows a state where the fastener 5 is removed, and FIG. 9B shows a state where the fastener 5 is hung. ing. As shown in FIGS. 9A and 9B, the fastener 5 fixed to the door 3 includes a rotating piece 51 for hanging the door 3 on the frame body 2, and the center of rotation of the rotating piece 51. The shaft 52 is used for the operator to operate the fastener 5 and the fixing means 53 for holding the shaft 52 on the frame 31 of the door 3.

  The rotating piece 51 has a plate shape, and its surface is fixed perpendicularly to the axial direction of the shaft 52. The rotating piece 51 includes a rotation stopper 51a for engaging with the frame 31 of the door 3 to lock the rotation of the rotating piece 51, and an inclined portion 51b for smoothly hanging the rotating piece 51 on the upper edge of the mounting portion 21. And are formed. The rotation stopper 51a has a shape that is substantially upright from one side of the rotation piece 51 downward. The inclined portion 51b is located just on the diagonal line of the rotation stopper 51a, and is inclined in a direction opposite to the upright direction of the rotation stopper 51a. During use, the lower surface of the rotating piece 51 comes into contact with the upper edge of the mounting portion 21 of the frame body 2 to prevent the door 3 from being detached from the frame body 2.

  The shaft 52 has an upper end fixed to the rotating piece 51 and a lower end penetrating through a hole formed in the contact piece 31 a of the frame 31. The hole formed in the contact piece 31 a is formed to expose the groove 52 a formed in the shaft 52 on the surface of the opening / closing device 100. A groove 52 a is formed on the lower end surface of the shaft 52. The groove 52 a is a portion that is operated when the operator rotates the shaft 52. Specifically, when the operator opens and closes the opening / closing device 100 attached to the ceiling C, the coin helicopter or the tip of the driver is engaged with the groove 52a of the shaft 52 exposed from the hole of the contact piece 31a. The shaft 52 is rotated.

  The fixing means 53 is a member that includes a holding portion 53b that is linearly recessed at the center of the member, and plate-like fixing portions 53a that are provided on both sides of the holding portion 53b. The fixing means 53 is fixed to the outer surface of the frame 31 by bringing the fixing portion 53a into contact with the outer surface of the frame 31 with the shaft 52 held by the holding portion 53b. FIG. 10 is a perspective view for explaining another example of the fastener 5, (a) shows a state where the fastener 5 is removed, and (b) shows a state where the fastener 5 is hung. ing. The fastener 5 shown in FIG. 9 is made of metal, whereas the fastener 5 shown in FIG. 10 is made of resin, and has substantially the same configuration as the fastener 5 shown in FIGS. 9 (a) and 9 (b). Therefore, parts having the same functions as those of the fastener 5 shown in FIGS. 9A and 9B are denoted by the same reference numerals, and the fasteners shown in FIGS. 10A and 10B are described. Omitted.

  Next, a method for attaching the opening / closing device 100 for the ceiling inspection port according to the first embodiment will be described below with reference to the drawings. FIG. 11A is a diagram for explaining a state when the door 3 and the connecting portion 4 fixed to the door 3 are connected to the frame body 2, and the protruding portion 47 of the first mounting member 45. Is shown in a state where the frame is fitted in the engagement hole 6 formed in the frame body 2. FIG. 11B is a view for explaining a state when the door 3 and the connecting portion 4 fixed to the door 3 are connected to the frame 2, and the connecting portion 4 is connected to the first attachment member 45. The state of sliding in the direction of arrow A until it contacts the notch 45b is shown.

  First, an operator attaches the hanging metal fitting 7 to the frame 2 and fixes only the frame 2 to the side edge of the hole P formed in the ceiling C (see FIG. 3).

  Next, the worker connects the door 3 integrated with the connecting portion 4 in advance in a factory or the like to the frame body 2. First, as shown in FIG. 11A, the protruding portion 47 provided on the first attachment member 45 of the connecting portion 4 is fitted into the insertion portion 61 of the engagement hole 6 formed in the frame body 2. . Next, as shown in FIG. 11B, the operator slides the first attachment member 45 on the rib 21 b along the longitudinal direction of the frame body 2 (toward the arrow A direction). The first mounting member 45 can be guided by effectively utilizing the rib 21b, and the first mounting member 45 can be more reliably prevented from falling off the frame body 2. At this time, the protrusion 47 provided on the first attachment member 45 moves from the insertion portion 61 of the engagement hole 6 to the locking portion 62 of the engagement hole 6 along the longitudinal direction of the frame body 2. The projection 47 of the first mounting member 45 is inserted into the insertion portion 61 of the engagement hole 6 provided in the frame 2, and the projection 47 is transferred from the insertion portion 61 to the locking portion 62 as it is. By operation, the first attachment member can be locked to the frame. The transition stroke of the protrusion 47 can be sufficiently ensured by utilizing the large dimension in the longitudinal direction of the frame body 2. At the same time, the screw 24 a provided on the frame 2 is engaged with the notch 45 b formed in the first attachment member 45. The first attachment member 45 is supported at two locations, the screw 24 a and the protrusion 47. Thereby, rotation of the 1st attachment member 45 is prevented and the 1st attachment member 45 is fixed to a predetermined position.

  According to the above embodiment, since only the frame 2 needs to be mounted along the periphery of the hole P formed in the ceiling C, the operator can attach the door 3 when mounting the frame 2. There is no need to support up to the weight of. In addition, since the end portions of the first arm 41 and the second arm 42 are connected in advance to the common first mounting member, the frame 2 can be attached to the frame 2 only by mounting the first mounting member 45 on the frame 2. The connection part 4 and the door 3 can be connected easily.

  In the above embodiment, the first mounting member 45 is provided with the protrusion 47 and the frame body 2 is formed with the engagement hole 6. However, the present invention is not limited to this. The first mounting member may have an engagement hole, and the frame body may have a protrusion.

  Moreover, although the said embodiment demonstrated the form which connected the 1st arm 41 and the 2nd arm 42 to the door 3 via the 2nd attachment member 46, this invention is limited to this. Instead, a form in which the pair of arms are directly connected to the door without providing the second attachment member may be employed. There may be a first attachment member 45.

  In the above embodiment, the first mounting member 45 is fitted to the frame 2 and the second mounting member 46 is fixed to the door 3. However, the present invention is not limited to this. Instead of this, a form in which the first attachment member is fitted to the door and the second attachment member is fixed to the frame 2 may be used.

  Moreover, although the said embodiment demonstrated the case where the frame 2 was fixed to the base material constructed | assembled on the ceiling via the suspension metal fitting 7, this invention is not limited to this, The frame 2 May be fixed directly to the ceiling.

It is a perspective view for demonstrating the opening / closing apparatus of the ceiling inspection opening of Embodiment 1. FIG. FIG. 3 is a perspective view for explaining a frame body according to the first embodiment. It is sectional drawing for demonstrating the state which attached the frame of Embodiment 1 to the ceiling. It is a perspective view for demonstrating the door of Embodiment 1. FIG. It is a perspective view for demonstrating the connection part of Embodiment 1, (a) has shown the inner side of the connection part, (b) has shown the outer side of the connection part. FIG. 5 is a diagram for explaining an engagement hole formed in the frame body according to the first embodiment. It is sectional drawing for demonstrating that the connection part of Embodiment 1 is located between a frame and a door. It is AA sectional drawing of FIG. 7, and is a figure for demonstrating the state of the link mechanism of the connection part in the state which closed the door. It is a perspective view for demonstrating the fastener of Embodiment 1, (a) has shown the state which has removed the fastener, and (b) has shown the state which hooks a fastener. It is a perspective view for demonstrating other examples of a fastener, (a) has shown the state which removed the fastener, (b) has shown the state which hangs a fastener. It is a figure for demonstrating a state when the connection part fixed to the door and this door is connected with a frame. It is a figure for demonstrating the state which mounted | wore the ceiling with the opening / closing apparatus of the conventional ceiling inspection port.

Explanation of symbols

2 Frame body 21b Rib 3 Door 4 Connection part 41 1st arm 42 2nd arm 45 1st attachment member 45a Protrusion part 46 2nd attachment member 6 Engagement hole 61 Insertion part 62 Locking part 100 Ceiling inspection port Opening and closing device C Ceiling P Hole formed in the ceiling

Claims (8)

A frame that is fixed to the ceiling along the periphery of the hole formed in the ceiling and surrounds the inspection port;
A door for opening and closing the inspection port;
An opening and closing device for a ceiling inspection port having a connecting portion for connecting the door to the frame so that the door does not interfere with the frame when opening and closing;
The connecting portion is
A plurality of arms interposed between the frame body and the door, and one end of which is rotatably connected to the door;
An opening / closing device for a ceiling inspection port, characterized in that the other end of each arm is rotatably connected and has a first attachment member that can be attached to and detached from the frame body in the connected state. The opening and closing device for a ceiling inspection port according to claim 1,
Either one of the frame and the first attachment member is provided with an engagement hole, and the other is provided with a protrusion that is inserted into the engagement hole.
The engaging hole includes an insertion portion having a shape in which the protruding portion can be inserted and removed, and a locking portion having a shape that prevents the protruding portion inserted into the engaging hole from being detached from the engaging hole. And an opening / closing device for a ceiling inspection port, characterized by having a shape that allows the protruding portion inserted into the insertion portion to shift to the locking portion. The opening and closing device for a ceiling inspection port according to claim 2,
The opening and closing device for a ceiling inspection port, wherein the engagement hole has a shape in which the protruding portion inserted into the insertion portion transitions to the locking portion along a longitudinal direction of the frame body. The opening and closing device for a ceiling inspection port according to claim 3,
The frame body has ribs protruding inward from the inner side surface thereof and extending in the longitudinal direction of the frame body,
The first attachment member has a shape that is slidable along the rib while being supported on the rib, and the slide causes the protrusion to move from the insertion portion to the locking portion. The opening / closing device for the ceiling inspection opening. The opening and closing device for a ceiling inspection port according to claim 1,
The frame has a rib protruding inward from the inside thereof and extending in a longitudinal direction of the frame, and the first attachment member is attached to the frame while being supported on the rib. An opening / closing device for a ceiling inspection port. In the opening and closing device for the ceiling inspection port according to any one of claims 1 to 5,
The frame and the door are made of an aluminum alloy,
An opening / closing device for a ceiling inspection port, wherein the connecting portion is formed of a steel material. In the opening and closing device for the ceiling inspection port according to any one of claims 1 to 6,
An opening / closing device for a ceiling inspection port, wherein the other end of each arm is rotatably connected to each other, and includes a second attachment member fixed to the door in the connected state. The opening and closing device for a ceiling inspection port according to claim 7,
The door has a shape with a plurality of corners;
The second mounting member has a shape that covers both outer surfaces sandwiching a specific corner of the door corners from the outside, and is fixed to the outer surface, respectively. Opening and closing of the ceiling inspection opening apparatus.

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