JP3445178B2 - Ceiling access door - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to buildings, ships,
Various wirings that are placed behind the ceiling of structures such as underground passages
Regarding the ceiling inspection port installed in the opening opened in the ceiling plate for maintenance and inspection of piping etc., for details, refer to the outer frame body attached to the opening formed in the ceiling plate and the outer frame body of the outer frame body. The present invention relates to a ceiling inspection port having an opening and an inner frame body that is openably and closably mounted by an opening and closing shaft.

[0002]

2. Description of the Related Art In a ceiling inspection port of this type, an outer frame member has four vertical and horizontal outer frame members each having a base wall portion along an inner peripheral surface of an opening portion of a ceiling plate by four outer frame corner tools. The inner frame is framed in a rectangular shape by the inner frame corner tool, and each of the inner and outer frame members has a base wall portion that is substantially parallel to the base wall portion of the outer frame body with a predetermined gap inside. Is generally configured. In such a ceiling inspection port, a pair of opening and closing shafts are aligned and assembled on the same center line at predetermined positions of the base wall portions of one of the outer frame body and the inner frame body that face each other. . Further, there is a structure in which a stopper member for stopping the inner frame body at the closed position is positioned and assembled between the outer frame body and the inner frame body.

[0003]

By the way, in the conventional ceiling inspection port, a pair of open / close shafts are provided at predetermined positions of the base wall portions of one of the outer frame body and the inner frame body which face each other. The work of aligning and assembling on the same center line requires a lot of labor, and the stopper members must be individually manufactured and assembled. Therefore, there is a problem that the number of parts and the number of assembling steps increase, resulting in high cost. An object of the present invention is to provide a ceiling inspection port capable of reducing costs by reducing the number of parts and the number of assembling steps.

[0004]

In order to achieve the above-mentioned object, the first invention has a structure as described in claim 1. Therefore, in the four outer frame corner tools that frame the outer frame body in a rectangular shape, the opening / closing shaft is assembled to the pair of outer frame corner tools facing each other to form a shaft-equipped corner tool. On the other hand, a stopper portion is provided on a pair of outer frame corner tools facing each other to form a corner tool with a stopper.
Therefore, unlike the prior art, it is necessary to align a pair of open / close shafts on the same center line at a predetermined position of the base wall portion of either the outer frame body or the inner frame body, and to install the stopper. It is possible to eliminate the need for individually manufacturing and assembling the members. In addition, a protruding edge is provided outside the base wall of the inner frame.
To the fitting groove formed on the outer frame.
-Because the collar of the open / close shaft of the tool is rotatably fitted,
Prevents accidental disengagement of the open / close shaft with respect to the groove
be able to. As a result, the inner frame is disengaged from the outer frame.
Accidents that fall are prevented. Also, the base wall of the inner frame
From the opening of the protruding edge on the outside of the part, a pair of shafts of the outer frame
The flange of the opening / closing shaft of the attached corner tool can be inserted and removed.
Therefore, the inner frame can be easily attached to and detached from the outer frame.
It In addition, a fitting groove is formed on the base wall of the inner frame.
At the tip of the lower protruding edge, the extension edge is approximately horizontal by the same amount.
Overhang, which makes it possible to form the fitting groove firmly.
You can Therefore, the flange of the opening / closing shaft is not
It is possible to prevent the trouble that is caused. Moreover, the upper and lower protrusions
Depending on the rim, the strength of each vertical and horizontal inner frame material, and by extension, the inner frame
The strength of the whole body can be increased. In addition, the upper and lower bumps
Of the protruding edges, the extended edge of the upper protruding edge is the stopper of the outer frame.
Abutment that comes into contact with the stopper of the attached corner tool so that it can come in and out of contact
It also functions as a department. Because of this,
With the extended edge of the protruding edge, a dedicated contact for the stopper
The need for arranging contact members is eliminated, and the number of parts
The number and man-hours for assembly are reduced.

A second aspect of the present invention is the invention as set forth in claim 2.
The gist is the configuration of the cage. Therefore, make the outer frame rectangular.
In the four outer frame corner tools that are framing,
Attach the open / close shaft to the pair of outer frame corner
A pair of outer frame corners that are configured as an attached corner tool and are opposed to each other
-As a corner tool with stopper by providing a stopper on the tool
I am configuring. Therefore, unlike the conventional case, the outer frame and the inner frame
At a predetermined position on the base wall of either one of the body and the frame,
It is necessary to align the opening / closing axis of the
Necessity and need to manufacture and assemble stopper members individually
The sex can be eliminated. In addition, outside the base wall of the inner frame
The outer frame body against the fitting groove formed by the protruding edge on the side
Of the opening and closing shaft of the pair of shaft-equipped corner tools is rotatably fitted and inserted.
Therefore, the opening / closing shaft may not come out unexpectedly in the fitting groove.
The condition can be prevented. As a result, for the outer frame
Accidents in which the inner frame comes off and falls are prevented. Well
Also, from the opening of the protruding edge on the outside of the base wall of the inner frame,
Insert and remove the collar of the opening / closing shaft of the pair of shaft-equipped corner tools of the outer frame
Therefore, the inner frame can be easily attached to and detached from the outer frame.
You can Also, for the pair of shaft-equipped corner tools of the outer frame
At the ends of the wing-shaped connecting plates of the pair of inner frame corner tools on the corresponding sides.
The formed bearing recess allows the collar of the open / close shaft to rotate.
Functioning in contact with the open / close shaft at a predetermined position on the inner frame.
It is possible to eliminate the trouble of disposing a dedicated bearing member
it can.

A third aspect of the present invention is as described in claim 3.
The main point is the composition. Therefore, the radius of the collar of the opening / closing axis
The bearing recess is formed in the shape of a concave arc of approximately the same radius.
Therefore, the flange of the opening / closing shaft is supported by the bearing recess and is stable in surface contact.
Can be well supported and centered on the open / close shaft with respect to the outer frame
The opening / closing operation of the inner frame body is smoothly performed.

The fourth invention is as described in claim 4.
The main point is the composition. Therefore, the corner tool with stopper
Stop the inner frame at the closed position against the tip of the wing-shaped connecting plate.
By bending the stopper piece as a stopper part
Since it is easily formed,
The need for assembling a stopper piece on is eliminated.

A fifth aspect of the present invention is as described in claim 5.
The main point is the composition. Therefore, the corner tool with stopper
A guide protrusion for opening and closing the inner frame with respect to the wing-shaped connecting plate
Since the part is projected, the inner frame collides with the outer frame.
It can be opened and closed smoothly without

A sixth aspect of the present invention is as described in claim 6.
The main point is the composition. Therefore, the outer frame should be rectangular.
One of four outer frame corner tools
Attach the open / close shaft to the pair of outer frame corner tools
A pair of outer frame corner tools that are configured as a corner tool and that face each other
By providing a stopper part on the
ing. Therefore, unlike the conventional case, the outer frame body and the inner frame body
Open and close a pair of opening and closing at the predetermined position of the base wall of either frame.
Need to align and assemble axes on the same center line
And the need to manufacture and assemble stopper members individually
It can be resolved. In addition, the outer frame body and the inner frame body
Between the base walls of the inner frame to keep it closed.
A locking device is provided. Therefore, the opening of the inner frame is closed.
In this way, the inner cover plate placed on the inner frame is locked
Eliminates the need to form notches corresponding to the
Therefore, the construction becomes easier. Also, the outer frame and the inner frame
Locking shaft for the base wall of either frame
And the locking plate is rotatably mounted, and on the base wall of the other frame
On the other hand, an engaging portion that engages with the locking plate in a disengageable manner is provided.
Therefore, the locking device can be easily configured. Furthermore
To be provided in a protruding shape within the height of the base wall of the other frame.
By engaging and disengaging the locking plate with the engaged part,
To form an engaging hole, engaging recess, etc. on the other base wall
It is possible to eliminate the need for
As a result, there is no problem that the strength of the base wall is reduced.
Yes.

A seventh invention is as described in claim 7.
The main point is the composition. Therefore, the outer frame should be rectangular.
One of four outer frame corner tools
Attach the open / close shaft to the pair of outer frame corner tools
A pair of outer frame corner tools that are configured as a corner tool and that face each other
By providing a stopper part on the
ing. Therefore, unlike the conventional case, the outer frame body and the inner frame body
Open and close a pair of opening and closing at the predetermined position of the base wall of either frame.
Need to align and assemble axes on the same center line
And the need to manufacture and assemble stopper members individually
It can be resolved. In addition, the outer frame body and the inner frame body
Between the base walls of the inner frame to keep it closed.
A locking device is provided. Therefore, the opening of the inner frame is closed.
In this way, the inner cover plate placed on the inner frame is locked
Eliminates the need to form notches corresponding to the
Therefore, the construction becomes easier. Also, the locking device has an inner frame
Locking shaft mounted on the outer surface of the base wall of the material, and the locking shaft
Locked integrally on the outer peripheral surface near the bottom of the
The plate and its locking plate so that
By the engaging part that is projected inward within the height of the base wall of the frame,
And easily configured. Furthermore, within the height of the base wall of the outer frame
The locking plate is engaged with and disengaged from the engaging part provided in the protruding shape
By doing so, the engaging hole and engaging recess for the locking plate are not
It is possible to eliminate the need to form the base wall of the frame,
The strength of the base wall of the outer frame decreases due to the engagement holes and engagement recesses
There will be no troubles.

The eighth invention is as described in claim 8.
The main point is the composition. Therefore, the inner frame is a square frame.
One of the four inner frame corner tools
Attach the open / close shaft to the pair of inner frame corner tools
While it is configured as a tool, the outer frame is framed in a rectangular shape.
Out of the four outer frame corner tools
Install a stopper on the pair of outer frame corner tools
It is configured as a corner tool with a lid. For this reason,
Differently, the base wall of either the outer frame or the inner frame
Align a pair of open / close shafts on the same center line at the predetermined positions
It is necessary to assemble them all together, and the stopper members must be manufactured individually.
The need to build and assemble can be eliminated. Well
Also, place the inner frame between the base walls of the outer and inner frames.
A locking device is provided for holding the closed state. this
Therefore, the inner frame body is placed on the inner frame body so as to close the opening.
A notch corresponding to the locking device is installed on the inner lid plate
Eliminates the need to form and makes construction easier.
It In addition, either one of the outer frame body and the inner frame body
A locking shaft and a locking plate are rotatably attached to the base wall of the body.
Wear and, with respect to the base wall portion of the other of the frame, engaging the locking plate Datsuka
The locking device can be easily installed by providing the engaging part
Can be configured. Furthermore, the base wall of the other frame
Locking plate for the engaging portion provided in a protruding shape within the height
By engaging and disengaging the lock plate,
It is possible to eliminate the need to form parts on the other base wall.
And the strength of the base wall is increased due to the engagement holes and engagement recesses.
There is no problem of deterioration.

A ninth invention is as described in claim 9.
The main point is the composition. Therefore, the inner frame is a square frame.
One of the four inner frame corner tools
Attach the open / close shaft to the pair of inner frame corner tools
While it is configured as a tool, the outer frame is framed in a rectangular shape.
Out of the four outer frame corner tools
Install a stopper on the pair of outer frame corner tools
It is configured as a corner tool with a lid. For this reason,
Differently, the base wall of either the outer frame or the inner frame
Align a pair of open / close shafts on the same center line at the predetermined positions
It is necessary to assemble them all together, and the stopper members must be manufactured individually.
The need to build and assemble can be eliminated. Well
Also, place the inner frame between the base walls of the outer and inner frames.
A locking device is provided for holding the closed state. this
Therefore, the inner frame body is placed on the inner frame body so as to close the opening.
A notch corresponding to the locking device is installed on the inner lid plate
Eliminates the need to form and makes construction easier.
It In addition, the locking device is attached to the outer surface of the base wall of the inner frame material.
Integrated locking shaft and outer peripheral surface near the bottom of the locking shaft
The lock plate that is rotatably mounted on the
Inside the height of the base wall of the outer frame so that it can be detachably engaged.
It is easily configured by the engaging portion projecting on the side. Furthermore
Is provided in a protruding shape within the height of the base wall of the outer frame.
By engaging and disengaging the locking plate with the engaged part,
It is necessary to form engaging holes, engaging recesses, etc. that are formed on the base wall of the outer frame.
The need can be eliminated, and the engagement holes and engagement recesses
The problem that the strength of the base wall of the outer frame is lowered does not occur.

According to a tenth aspect of the present invention, there is provided a tenth aspect of the invention.
The main point is the composition of the library. Therefore, the first for the locking plate
A stopper portion and a second stopper portion are formed respectively.
This ensures that the locking plate is in the locked and unlocked positions.
Locking / unlocking operation of the locking device
Can be performed easily and reliably.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. In FIG. 3 showing the ceiling inspection port in a plane, FIG. 1 shown in a section taken along the line I-I in FIG. 3 and FIG. 2 shown in a section taken along the line II-II in FIG.
The ceiling inspection port 30 attached to the opening 2 opened in the ceiling plate 1 includes an outer frame body 31 and an inner frame which is attached to the opening portion of the outer frame body 31 so as to be opened and closed by a pair of opening and closing shafts 90. And a body 51. For convenience of explanation, the center side of the opening 2 of the ceiling plate 1 will be described as the inside and the opposite side will be described as the outside. Further, a field edge 3 is provided on the back side of the ceiling plate 1 in the vicinity of the opening 2, and an attachment receiving member 4 having a channel-shaped cross section is provided on the field edge 3.

As shown in FIGS. 4 and 5, the outer frame 31
Is frame-shaped in a rectangular shape by the vertical and horizontal outer frame members 32. The vertical and horizontal outer frame members 32 are formed to have substantially the same cross-sectional shape by a light alloy extruded material such as an aluminum alloy or a bent metal material such as a stainless steel plate. Each outer frame member 32 has a base wall portion 33 that is substantially parallel to the inner peripheral surface of the opening 2 of the ceiling plate 1, and the base wall portion 33.
And an outer projecting edge 38 projecting from the lower end toward the lower surface of the ceiling plate 1 and having a substantially L-shaped cross section. In addition, upper and lower projecting edges 35 having a substantially L-shaped cross section and facing each other are projected toward the inner frame body 51 at both upper and lower end portions inside the base wall portion 33 of each outer frame member 32. A fitting groove 34 that opens toward the inner frame 51 is formed by the upper and lower protruding edges 35. Both ends of each outer frame member 32 in the longitudinal direction are butted against each other. Then, a total of four outer frame cords are straddled over the fitting grooves 34 of the adjacent outer frame members 32.
The outer frame body 31 that is framed in a rectangular shape is configured by inserting and connecting the tools.

Of the four outer frame corner tools, the outer frame corner tools facing each other are constituted by a pair of shaft-equipped corner tools 41, and the other outer frame corner tools facing each other are , A pair of corner tools with stopper 45. 5 and 6
As shown in FIG. 5, the pair of shaft-equipped corner tools 41 are provided with mutual fitting grooves 34 in the corner portions of the adjacent outer frame members 32.
The blade-shaped connecting plates 42 to be inserted into the blade-shaped connecting plates 42 are provided at right angles, and each of the blade-shaped connecting plates 42 is formed with a caulking notch 43. A mounting hole 44 for the opening / closing shaft 90 is formed in the pair of shaft-equipped corner tools 41 so as to penetrate toward the tip of each blade-shaped connecting plate 42. In this embodiment, as shown in FIG. 4, the upper shaft-equipped corner tool 41 and the lower shaft-equipped corner tool 41 are commonly used so that the shaft-equipped corner tool 41 can be used in common. Two mounting holes 44 for the opening / closing shaft 90 are provided in the upper and lower parts of the one wing-shaped connecting plate 42 near the tip, and the opening / closing shaft 90 is selectively used by these two mounting holes 44. It is attached.

That is, in the state in which the pair of shaft-equipped corner tools 41 are arranged symmetrically with respect to each other as viewed in FIG.
The opening / closing shaft 90 is attached to the inner frame 51 in a facing manner by using 4. The opening / closing shaft 90 is attached to the wing-shaped connecting plate 42 by being inserted into the mounting hole in the small diameter shaft portion 93 formed at the base end of the shaft portion 91 and caulking the tip end portion of the small diameter shaft portion 93. There is. Further, a large-diameter flange portion 92 is formed at the tip of the opening / closing shaft 90.

As shown in FIGS. 5 and 7, the pair of stopper-equipped corner members 45 has a wing-shaped connecting plate 46 which is inserted into the fitting groove 34 of the outer frame member 32 adjacent to each other at a right angle. In preparation for this, each of these wing-shaped connecting plates 46,
A notch 47 for crimping is formed. The pair of stopper-equipped corner tools 45 are formed symmetrically in the vertical direction as viewed in FIG. 4, and a tip portion of each one of the blade-shaped connecting plates 46 serves as a stopper portion that stops the inner frame body 51 at the closed position. A stopper piece 48 having a substantially U-shaped planar shape is integrally formed by bending. Further, in this embodiment, a guide protrusion 49 for guiding the opening and closing of the inner frame body 51 is provided at the substantially central portion of each wing-shaped connecting plate 46 of each of the pair of corner tools with stopper 45. It projects toward the base wall portion 53. The guide protrusion 49 has a substantially arcuate plane cross section, and is provided in a vertically elongated curved shape from the lower portion to the upper portion of the wing-shaped connecting plate 46.

As shown in FIGS. 4 and 5, of the four corners formed by the ends of the vertical and horizontal outer frame members 32, the two corners on the right side of the figure have a pair of corners with shafts. Ingredient 4
Each wing-shaped connecting plate 42 of No. 1 is inserted into the fitting groove 34 of the adjacent outer frame member 32. In the remaining two corner portions, the wing-shaped connecting plates 46 of the pair of stopper-equipped corner tools 45 are provided.
Are inserted into the fitting grooves 34 of the outer frame members 32 adjacent to each other. Thereafter, a part of the upper and lower projecting edges 35 of the fitting groove 34 of each outer frame member 32 is caulked toward the caulking notches 43, 47 of each wing-shaped connecting plate 42, 46, whereby each outer frame member The four corners formed by 32 are respectively coupled by a shaft-equipped corner tool 41 and a stopper-equipped corner tool 45,
As a result, the outer frame body 31 has a rectangular frame structure. In this way, the outer frame body 31 is configured as a framework, so that the opening / closing shafts 90 of the pair of shaft-equipped corner tools 41 are aligned on substantially the same center line. Furthermore, in the pair of corner tools 45 with stoppers, the stopper surfaces of the lower end surfaces of the stopper pieces 48 are aligned at the same height position.

As described above, the outer frame body 31 having a rectangular frame structure is fitted into the opening 2 of the ceiling plate 1 as shown in FIG.
Attached by 0. The support means 10 includes a suspension member 11 and a support bolt 15. Hanging member 11
Has an up-down hanging piece 12 and a supporting piece 14 bent at a right angle from the upper end of the hanging piece 12 and has a substantially inverted L shape.
It has a letter shape. The hanging piece 12 has an outer frame 3
Locking claw 13 which is inserted into and engages with the protruding edge 35 above
Are formed in a cut-and-raised shape with an upward shape. Further, the support member 14 of the hanging member 11 is provided with a screw hole,
A support bolt 15 is screwed into the screw hole so as to be vertically movable.

That is, as shown in FIGS. 1 and 2, the outer frame body 31 is fitted into the opening 2 of the ceiling plate 1, and the locking claws 13 of the suspension member 11 are mounted on the outer frame member 32. Protruding edge 35
To be engaged. Further, the mounting receiving member 4
A support bolt 15 is installed on top of it at its lower end.
In this state, the support bolt 15 is screwed in, so that the outer edge 38 of the outer frame body 31 is lifted up to a position where it comes into contact with the lower surface of the ceiling plate 1. By this, the ceiling board 1
The outer frame member 31 is suspended and held by the support means 10 with respect to the opening 2.

As shown in FIGS. 1 to 3, in the opening of the outer frame 31, a pair of shaft-equipped corner tools 41 opposed to each other is provided.
The inner frame 51 is removably and removably assembled by the open / close shaft 90, and is held in a closed state by the locking device 120. As shown in FIGS. 9 to 11, the inner frame body 51
Is framed in a rectangular shape by the vertical and horizontal inner frame members 52. The vertical and horizontal inner frame members 52 are formed to have substantially the same cross-sectional shape by a light alloy extruded material such as an aluminum alloy or a bent metal material such as a stainless steel plate.
In addition, the vertical and horizontal inner frame members 52 are the base wall portions 33 of the outer frame body 31.
A base wall portion 53 that is substantially parallel to the inside of the
An outer projecting edge 58 that projects from the lower end of the base wall portion 53 toward the protruding edge 35 below the lower end of the base wall portion 53 of the outer frame 31 in substantially the same plane, and a lower end of the same base wall portion 53. And an inner projecting edge 59 that projects inwardly from the inner side of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall, and is formed in a substantially T-shaped cross section.

As shown in FIG. 11, each of the vertical and horizontal inner frame members 52
In a substantially lower half portion outside the base wall portion 53, a fitting groove 54 into which the flange portion 92 of the opening / closing shaft 90 of the shaft-equipped corner tool 41 of the outer frame 31 is rotatably and slidably inserted. Are formed. The fitting groove 54 is formed by upper and lower projecting edges 55 having a substantially L-shaped cross section, which project from the outer surface of the base wall portion 53, and opens toward the base wall portion 33 of the outer frame body 31. . Further, in this embodiment, the extension edges 56 are projected substantially horizontally by the same amount at the tips of the upper and lower projecting edges 55 of the vertical and horizontal inner frame members 52, respectively. Strength is increased. Further, as shown in FIG. 12, the extended edge 56 of the projecting edge 55 on the inner frame member 52 comes into contact with the stopper surface of the lower end of the stopper piece 48 of the corner tool with stopper 45 of the outer frame body 31 so as to be separable. It also functions as a contact portion. Further, as shown in FIGS. 9, 10, and 22, the inner frame body 51
At the position corresponding to the opening / closing shaft 90 of the corner-equipped corner tool 41 of the outer frame body 31, the protruding edge 55 and the extended edge 56 above the
A notch-shaped opening 57 into which the opening / closing shaft 90 can be inserted / removed is formed. In addition, in the embodiment, FIG. 11 and FIG.
As shown in FIG. 2, the projecting edge 55 and the extension edge 56 below the inner frame body 51 form an outer projecting edge 58.

As shown in FIG. 9, each of the vertical and horizontal inner frame members 52
The longitudinal ends of the inner frame member 52 are abutted against each other, and a total of four inner frame corner tools 70 are inserted and connected across the fitting grooves 34 of the adjacent inner frame members 52.
An inner frame body 51 framed in a rectangular shape is configured. 14
As shown in FIG.
At the two corners, blade-shaped connecting plates 72 to be inserted into the fitting grooves 54 are provided at right angles, and each of the blade-shaped connecting plates 72 has a notch 73 for caulking. Then, at the four corners formed by the end portions of the vertical and horizontal inner frame members 52, the wing-shaped connecting plates 72 of the inner frame corner tool 70 are inserted into the fitting grooves 54 of the inner frame members 52, respectively.
A part of the upper and lower protruding edges 55 of the fitting groove 54 is caulked toward the caulking notch portion 73, so that the inner frame body 51 is formed.
Has a rectangular framework.

Further, as shown in FIG. 10, a pair of inner frame corners on the side of the outer frame body 31 corresponding to the pair of shaft-equipped corner tools 41.
A bearing recess 74 is formed at the tip of the wing-shaped connecting plate 72 of the tool 70 so that the flange 92 of the opening / closing shaft 90 is rotatably abutted. Further, the bearing recess 74 is provided in the opening / closing shaft 9
It is formed in a concave arc shape having a radius substantially the same as the radius of the collar portion 92 of 0. Further, as shown in FIG. 14, the inner frame corner tool 70
By setting the lengths of the two wing-shaped connecting plates 72 to be the same and forming the bearing recesses 74 at the tips of the two wing-shaped connecting plates 72 respectively, the four corners formed by the ends of the vertical and horizontal inner frame members 52 are formed. On the other hand, it is possible to form a frame by using the common inner frame corner tool 70, and it is possible to reduce the cost by sharing the parts.

As shown in FIGS. 15 to 17, the inner frame 51
An inner lid plate 80 is fitted in the frame formed by the base wall portion 53 with the lower surface of the inner lid plate 80 abutting the inner projecting edge 59 of the inner frame body 51. The back surface of the inner lid plate 80 has a required number (6 in FIG. 3).
It is pressed by the cover plate pressing member 81. Further, as shown in FIGS. 15 to 17, the lid plate pressing member 8 is
1 is provided with a base portion 85 and a support portion 86 and is formed in a substantially L-shaped cross section, and a screw hole 84 is formed in the base portion 85 by burring or the like. Also, the cover plate pressing member 8
A substantially curved pressing piece 87 for pressing the upper surface of the inner lid plate 80 is formed at the tip of the first supporting portion 86. Then, in the cover plate pressing member 81, a screw 88 is screwed into the screw hole 84 of the base portion 82 from the outside of the base wall portion 53 of each of the vertical and horizontal inner frame members 52 of the inner frame body 51 through the holding attachment long hole 61. As a result, it is assembled so as to be rotatable and vertically adjustable. In this way, the cover plate pressing member 81 is assembled to the base wall portion 53 of each of the vertical and horizontal inner frame members 52 so as to be rotatable and vertically movable, so that the inner cover plates 8 having different plate thickness dimensions can be obtained.
Even if the inner cover plate is a stack of 0 or two sheets, it can be pressed well without a pressing defect.

As shown on the left side of FIG. 2, in order to keep the inner frame body 51 closed between the base wall portions 33 and 53 of the outer frame body 31 and the inner frame body 51. The locking device 120 is provided. As shown in FIGS. 9, 13, 18, and 19, the locking device 120 includes a locking shaft 121,
A lock plate 130 and a lock bracket 140 are provided. That is, the locking shaft 121 is attached to the outer surface of the base wall portion 53 of the inner frame member 52 at a substantially central portion in the longitudinal direction via the lock bracket 140. As shown in FIG. 9 and FIG. 18, the lock bracket 140 has a vertical cross-section substantially C having bearing holes in the vertical direction.
It is integrally provided with a cylindrical bearing portion 141 and a mounting piece 142 protruding from both sides of the opening of the bearing portion 141. The lock bracket 140 is attached to the mounting piece 14 of the lock bracket 140.
2, the base wall portion 5 of the inner frame member 52 is fixed by the screw 143.
3 is attached to the outer side surface of the outer peripheral surface 3 at a substantially central portion in the longitudinal direction.

A locking shaft 121 is rotatably attached to the bearing 141 of the lock bracket 140. As shown in FIGS. 18 to 20, the lock shaft 121 includes a small-diameter and long shaft body 122 rotatably fitted in the bearing portion 141 and a lock plate 130 described below in detail below the shaft body 122. Large-diameter and short operating shaft 1 that is provided on the same center line by sandwiching
And 23. Further, the lower end portion of the operation shaft portion 123 penetrates the outer extending edge 58 of the inner frame member 52 and slightly projects from the lower surface of the outer extending edge 58. Then, on the lower end surface of the operation shaft portion 123, the locking plate 130 is provided together with the locking shaft 121.
Rotational groove 1 into which coins for rotating is inserted
24 is recessed.

The locking plate 130 is the shaft body 12 of the locking shaft 121.
2 and the operating shaft 123, the locking shaft 121 is sandwiched between them.
Is formed integrally with the outer peripheral surface near the lower part of the so as to be rotatable. In this embodiment, the locking shaft 121 and the locking plate 130
Is integrally formed by forging. Furthermore, lock plate 1
Reference numeral 30 denotes an arc-shaped base portion 130a formed along the axis of the locking shaft 121, and a flat plate-shaped locking portion 130b horizontally extending from one side of the base portion 130a for a required length.
Is equipped with. Then, the locking shaft 121 is rotated in the rotation groove 124 of the operation shaft portion 123,
As shown in FIG. 21 (A), the locking plate 130 engages with the protruding edge 35 under the outer frame 31 to hold the inner frame 51 in the closed position, and FIG. ),
It is disengaged from the protruding edge 55 below the outer frame 31 and is also the inner frame 51.
The arrangement is switched to an unlocking position that allows the opening of the. As shown in FIGS. 21A and 21B, a hole 60 is formed in the base wall portion 53 of the inner frame member 52 to avoid interference with the base portion 130a of the locking plate 130.

As shown in FIG. 21A, the locking plate 13
No. 0, the locking plate 130 abuts on the outer surface of the base wall portion 53 of the inner frame member 52 when the locking plate 130 is rotated in one direction and is arranged at the locking position, and the further rotation is restricted. Stopper part 1
31 is formed at the boundary between the other side surface of the locking portion 130b and the base portion 130a. Further, the locking plate 130 contacts the base wall portion 53 of the inner frame member 52 when the locking plate 130 is rotated in the opposite direction and is arranged at the unlocked position, and further rotation is restricted. The second stopper portion 132 is the locking portion 13.
It is formed on one side surface of 0b.

The ceiling inspection port 30 of this embodiment is constructed as described above. Therefore, when the inner frame body 51 is attached to the outer frame body 31, first, the inner frame body 51 is gripped in a vertically oriented state as shown in FIG. Maintaining this state, the inner frame body 51 has the opening / closing shaft 90 of the pair of shaft-equipped corner tools 41 of the outer frame body 31 and the base wall portion 3 of the outer frame member 32.
3 is inserted from below the opening of the outer frame 31. Next, as shown in FIG. 22B, the inner frame member 5
The opening 57 formed as a cutout in the protruding edge 55 above the second fitting groove 54 has the opening / closing shaft 90 of the pair of shaft-equipped corner tools 41.
Where the inner frame body 51 is inserted to a position facing
The inner frame body 51 is laterally moved toward the opening / closing shaft 90 of the pair of shaft-equipped corner tools 41. As a result, the flange portions 92 of the pair of open / close shafts 90 are inserted into the openings 57 of the fitting groove 54 of the inner frame member 52.

After that, the inner frame 51 is lowered substantially directly below, so that the pair of opening / closing shafts 9 are inserted into the fitting grooves 54 of the inner frame member 52.
The 0 collar part 92 is fitted. When the inner frame body 51 is lowered to a predetermined position, the flange portion 92 of the opening / closing shaft 90 comes into contact with the bearing recess 74 of the inner frame corner tool 70 of the opening / closing shaft 90 and is stopped at this position. In this state, the inner frame body 51 is rotated toward the opening of the outer frame body 31 with the opening / closing shaft 90 as a fulcrum to the closed position. As shown in FIG. 12, when the inner frame body 51 is closed to the closed position, the stopper piece 4 of the corner tool 45 with a stopper is inserted.
8, the inner frame 51 has a protruding edge 55 above it.
The extended edge 56 of the abutment is stopped.

Here, as shown in FIG. 21A, the locking shaft 121 of the locking device 120 is rotated in the locking groove in the operation groove 123. When the locking plate 121 is rotated to the locking position together with the locking shaft 121, the first stopper portion 131 comes into contact with the outer surface of the base wall portion 53 of the inner frame member 52, and further rotation is restricted. It In this way
By disposing the locking plate 130 in the locking position, the locking plate 130 serves as the engaging portion of the outer frame body 31 and the lower protruding edge 35.
Engage with the upper end surface of the. As a result, the inner frame body 51 is locked and attached to the outer frame body 31 in the closed state.

When the inner frame body 51 is opened with respect to the outer frame body 31,
First, as shown in FIG. 21 (B), the locking plate 130 in the locking position is pivotally operated to the unlock position as shown in FIG. 21 (B), and is retracted to a position where it does not interfere with the outer frame 31. . In this state, the inner frame body 51 is rotated downward about the opening / closing shaft 90 with respect to the outer frame body 31.
Then, the inner frame body 51 is opened in a substantially drooping manner at one side of the outer frame body 31. With the inner frame 51 open, maintenance and inspection of the wiring and piping inside the ceiling plate 1 are performed. When the inner frame body 51 is removed from the outer frame body 31, the inner frame body 51 is easily removed from the outer frame body 31 by operating in the reverse procedure of the mounting operation.

As described above, as shown in FIGS. 4 and 5, the four outer frame cores that frame the outer frame body 31 in a rectangular shape are used.
In the corner tool, the opening / closing shaft 90 is assembled to the pair of outer frame corner tools facing each other to form the shaft-equipped corner tool 41, and the other pair of outer frame corner tools are opposed to the stopper piece. Four
8 is formed to constitute a corner tool 45 with a stopper. Therefore, unlike the prior art, the outer frame body 31 and the inner frame body 51
Eliminating the necessity of assembling a pair of opening / closing shafts by aligning them on the same center line at a predetermined position of the base wall portion of one of the frame bodies and the need to manufacture and assemble the stopper members individually. Therefore, it is possible to reduce the number of parts and the number of assembling steps to reduce the cost.

Further, as shown in FIG. 11, a fitting groove formed on the outside of the base wall portion 53 of each of the vertical and horizontal inner frame members 52 of the inner frame body 51 by a protruding edge 55 having a substantially L-shaped cross section. 54, the open / close shaft 9 of the pair of shaft-equipped corner tools 41 of the outer frame 31
Since the collar portion 92 of 0 is rotatably fitted, it is possible to prevent the opening / closing shaft 90 from being accidentally pulled out from the fitting groove 54. Therefore, it is possible to prevent an accident in which the inner frame body 51 comes off the outer frame body 31 and falls. Also,
As shown in (A) to (C) of FIG. 22, a vertical cross-section L is formed outside the base wall portion 53 of each vertical and horizontal inner frame member 52 of the inner frame 51.
With respect to the fitting groove 54 formed by the V-shaped projecting edge 55, a pair of shaft-equipped coaxes of the outer frame body 31 are opened from the opening 57.
The collar portion 92 of the opening / closing shaft 90 of the tool 41 can be inserted and removed. Therefore, the inner frame body 51 can be easily attached to and detached from the outer frame body 31.

Further, as shown in FIG. 11, extended edges 56 are extended substantially horizontally by substantially the same amount at the tips of the upper and lower projecting edges 55 constituting the fitting groove 54 of the inner frame member 52. By this, the fitting groove 54 can be firmly configured,
It is possible to prevent the problem that the collar portion 92 of the opening / closing shaft 90 comes off from the fitting groove 54. Moreover, the strength of each of the vertical and horizontal inner frame members 52, that is, the inner frame body 5 is strong due to the upper and lower projecting edges 55.
The strength of the whole 1 can be raised. Further, as shown in FIG. 12, of the upper and lower protruding edges 55, the upper protruding edge 55
The extended edge 56 of the corner portion 45 of the outer frame 31 with the stopper is
It also functions as an abutting portion that comes into contact with the stopper surface at the lower end of the stopper piece 48 so as to come into contact with and separate from the stopper surface. Therefore, the extended edge 56 of the upper protruding edge 55 eliminates the need for disposing a dedicated contact member for the stopper piece 48, and the number of parts and the number of assembling steps are reduced accordingly.

Further, in this embodiment, as shown in FIGS. 7 and 12, the inner frame 51 is opened and closed with respect to each wing-shaped connecting plate 46 of the pair of stopper-equipped corner members 45 of the outer frame 31. The guide protrusions 49 for each are projected. Therefore, when the inner frame body 51 is opened and closed with respect to the outer frame body 31, the inner frame body 51 is positioned above the base wall portion 53 by the guide protrusion 49 of the corner tool with stopper 45 of the outer frame body 31. The extension edge 56 is guided and opened and closed. Therefore, the inner frame body 51 can be guided to be opened and closed by the outer frame body 31 without disposing a dedicated guide member.

Further, as shown in FIG. 10, a pair of inner frame corners on the side of the outer frame 31 corresponding to the pair of shaft-equipped corner tools 41.
A bearing recess 74 is formed at the tip of the wing-shaped connecting plate 72 of the tool 70 so that the flange 92 of the opening / closing shaft 90 is rotatably abutted. Therefore, it is possible to eliminate the trouble of disposing a dedicated bearing member for the opening / closing shaft 90 at a predetermined position of the inner frame body 51. Moreover, the bearing recess 74 is formed by the opening / closing shaft 9
It is formed in a concave arc shape having a radius substantially the same as the radius of the collar portion 92 of 0. Therefore, the flange portion 92 of the opening / closing shaft 90 can be stably supported by the bearing recess 74 in a surface contact state, and the opening / closing operation of the inner frame 51 centering on the opening / closing shaft 90 with respect to the outer frame 31 can be smoothly performed. It

As shown in FIGS. 2 and 9, the outer frame 3
1 between the base wall portions 33 and 53 of the inner frame body 51,
Locking device 120 for holding the inner frame body 51 in the closed state
Are arranged without interfering with the inner lid plate 80 of the inner frame body 51. For this reason, the necessity of forming a notch corresponding to the locking device 120 on the inner lid plate 80 is eliminated, and the construction becomes easier accordingly.

Further, as shown in FIGS. 18 to 21, the locking device 120 includes a locking shaft 121 mounted on the outer surface of the base wall portion 53 of the inner frame member 52 via a locking bracket 140, and the locking shaft 121. A locking plate 130 integrally rotatably provided on the outer peripheral surface near the lower part of the locking shaft 121 in a state of being sandwiched between the shaft body 122 of 121 and the operation shaft part 123, and the locking plate 13 thereof.
It is configured by a lower projecting edge 35 as an engaging portion provided in the height of the base wall portion 33 of the outer frame body 31 so as to engage with and disengage from 0. In this way, the locking device 120 can be easily configured by the locking shaft 121, the locking plate 130, and the lower protruding edge 35 as the engaging portion. Moreover, by causing the lower projecting edge 35 provided in the height of the base wall portion 33 of the outer frame body 31 to function as an engaging portion, the engaging hole and the engaging recessed portion for the locking plate 130 are formed in the outer frame body. It is possible to eliminate the need to form the base wall portion 33 of the outer wall body 31 of the outer frame body 31 of the outer frame body 31 by the engagement hole or the engagement recess.
There is no problem that the strength of is reduced.

A first stopper portion 131 is formed at the boundary between the other side surface of the locking portion 130b of the locking plate 130 and the base portion 130a, and a second stopper portion is formed on one side surface of the locking portion 130b. 132 is formed. For this reason, when the locking plate 130 is rotated in one direction and placed at the locking position, the first stopper portion 131 of the locking plate 130 is moved to the inner frame member 5.
By contacting the outer surface of the second base wall portion 53, further rotation can be restricted. Further, when the locking plate 130 is rotated in the opposite direction and is arranged at the unlocking position, the second stopper portion 132 comes into contact with the inner surface of the engagement hole of the base wall portion 53 of the inner frame member 52, and the lock stopper plate 130 is further locked. Rotation can be restricted.
Therefore, the locking / unlocking operation of the locking device 120 can be performed easily and reliably.

The present invention is not limited to the above embodiment. For example, in the above embodiment,
In the four outer frame corner tools that frame the outer frame body 31 in a rectangular shape, the opening / closing shaft 90 is assembled to the pair of outer frame corner tools facing each other to form the shaft-equipped corner tool 41. However, the present invention is not limited to this, and in the four inner frame corner tools 70 that frame the inner frame body 51 in a rectangular shape,
On the other hand, with respect to the pair of inner frame corner tools 70 facing each other, the opening / closing shaft 9
0 may be assembled to form a corner-equipped corner tool. However, in this case, inside the base wall portion 33 of the outer frame 31, a fitting groove into which the flange portion 92 of the opening / closing shaft 90 is pivotably and slidably formed is formed by the upper and lower protruding edges. An opening into which the opening / closing shaft 90 can be inserted / removed is formed in a part of the protruding edge below the opening. Further, the outer frame corner tool of the outer frame body 31 has an opening / closing shaft 90.
Bearing recesses are formed.

Further, in the above-mentioned embodiment, with respect to the field edge 3 mounted near the opening 2 on the back surface of the ceiling board 1,
The case where the outer frame body 31 is attached via the attachment receiving member 4, the hanging member 11, and the support bolt 15 has been illustrated, but the present invention is not limited to this. For example, as shown in FIG. 23 and FIG. 24, the field edge receiving member 5 for the field edge 3 on the back side of the ceiling plate 1.
The mounting bolt 6 is mounted on the mounting member 6 and is suspended and supported by the mounting member 6 via a pair of upper and lower clamps 24.
The outer frame body 31 may be attached by two. Note that FIG.
3 and FIG. 24, the base wall portion 33 of the outer frame 31 is provided with a mounting hole 35a for the suspension bolt 22.
Then, the bracket 27 for the hanging bolt 22 is attached to the base wall portion 33 of the outer frame body 31 by the screw 29 screwed through the attachment hole 35a. A bearing cylinder 28 is formed on the upper part of the mounting bracket 27, and the support shaft portion 23 below the suspension bolt 22 is rotatably fitted into the bearing cylinder 28.

[0045]

As described above, according to the present invention,
Unlike conventional cases, it is necessary to align a pair of open / close shafts on the same center line at a predetermined position of the base wall portion of either the outer frame body or the inner frame body, and to install the stopper member individually. You can eliminate the need to manufacture and assemble
Costs can be reduced by reducing the number of parts and the number of assembly steps.

[Brief description of drawings]

FIG. 1 is a view showing a ceiling inspection port according to an embodiment of the present invention.
It is sectional drawing based on the II line of FIG.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a plan view showing the entire ceiling inspection port.

FIG. 4 is a partially cutaway plan view showing a state in which each of the vertical and horizontal outer frame members of the outer frame body is squarely framed by a pair of shaft-equipped corner tools and a pair of stopper-equipped corner tools.

5 is a sectional view of the outer frame body, which is also based on the line VV in FIG. 4. FIG.

FIG. 6 is a perspective view showing a corner-equipped corner tool of the outer frame body.

FIG. 7 is a perspective view showing a corner tool with a stopper for the outer frame member.

FIG. 8 is a perspective view showing a state in which the outer frame is suspended from the opening of the ceiling plate by the supporting means.

FIG. 9 is a plan view showing a state in which each of the vertical and horizontal inner frame members is squarely framed by four inner frame corner tools.

FIG. 10 is a side view showing the relationship between the inner frame body and the inner frame corner tool.

FIG. 11 is a sectional view showing the relationship between the opening / closing shaft of the corner-equipped corner tool of the outer frame and the fitting groove of the inner frame.

FIG. 12 is a cross-sectional view showing a relationship between a stopper piece of a corner tool with a stopper of the outer frame body and a protruding edge on the inner frame body.

FIG. 13 is a sectional view showing a state in which the locking device is similarly assembled between the base wall portions of the outer frame body and the inner frame body.

FIG. 14 is a perspective view showing an inner frame corner tool.

FIG. 15 is a perspective view showing an assembling relationship of the inner frame body, the inner lid plate, and the lid plate pressing member.

FIG. 16 is a sectional view showing an assembling relationship of the inner frame body, the inner lid plate and the lid plate pressing member.

FIG. 17 is a sectional view taken along line XVII-XVII of FIG.

FIG. 18 is a front view showing the relationship between the lock bracket and the locking shaft of the locking device.

FIG. 19 is a sectional view showing a relationship between a lock bracket and a lock shaft of the lock device.

FIG. 20 is a perspective view showing a locking shaft of the locking device.

FIG. 21 is an explanatory view showing a state in which locking plates of the locking device are arranged at a locking position and an unlocking position, respectively.

FIG. 22 is an explanatory view sequentially showing the procedure for mounting the inner frame body on the outer frame body.

FIG. 23 is a cross-sectional view showing a state in which the outer frame is suspended from the opening of the ceiling plate by another supporting means.

FIG. 24 is a perspective view showing the relationship between other supporting means and the outer frame body.

[Explanation of symbols]

1 ceiling board 2 openings 30 Ceiling inspection port 31 Outer frame 32 Vertical and horizontal outer frame materials 33 Base wall 34 Fitting groove 35 protruding edge 41 Corner Corner Tool 42 Wing-shaped connecting plate 45 Corner Tool with Stopper 46 Wing-shaped connecting plate 48 Stopper piece (Stopper part) 49 Guide protrusion 51 Inner frame 52 Vertical and horizontal inner frame materials 53 Base wall 54 Fitting groove 55 protruding edge 70 Inner frame corner tool 72 Wing-shaped connecting plate 74 Bearing recess 90 open / close shaft 92 Tsuba 120 locking device 121 Locking shaft 130 Lock plate 131 First stopper part 132 Second stopper part

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04F 19/08 101

Claims (10)

(57) [Claims] 1. A ceiling inspection port provided with an outer frame body attached to an opening formed in a ceiling plate and an inner frame body openably and closably attached to the opening of the outer frame body by a pair of opening and closing shafts. In the outer frame body, vertical and horizontal outer frame members each having a base wall portion along the inner peripheral surface of the opening of the ceiling plate are quadrangularly framed by four outer frame corner tools, The frame body has four vertical and horizontal inner frame members each having a base wall portion that is substantially parallel to the base wall portion of the outer frame body with a predetermined gap inside.
One of the four outer frame corner tools is opposed to one of the four outer frame corner tools, and the outer frame corner tool facing each other is provided with the pair of opening / closing shafts. -The outer frame corner tool, which is configured as a corner tool and is opposed to the other, is provided with a stopper portion that stops the inner frame body at the closed position when the inner frame body is closed. is configured as na instrument, on the outside of the base wall portion of said inner frame member, the shape at the tip of the control shaft
The formed collar is rotatable and slidable, and the base of the outer frame is
The fitting groove that opens toward the wall is formed by the upper and lower protruding edges.
Formed on the upper protruding edge, the notch into which the opening / closing shaft can be inserted and removed.
-Shaped opening is formed , and the extension edges are formed in approximately the same amount at the tips of the upper and lower protruding edges.
Overhanging, the extended edge of the protruding edge of the upper frame of the outer frame corner tool
A ceiling inspection port that is configured to come in contact with and separate from the stopper . 2. Attached to an opening formed in a ceiling plate.
The outer frame body and the pair of open / close shafts are attached to the opening of the outer frame body.
Ceiling point with an inner frame body that can be opened and closed
In the inspection, the outer frame is a base wall along the inner peripheral surface of the opening of the ceiling plate.
Each vertical and horizontal outer frame member has four outer frame corner tools.
The inner frame body has a predetermined gap inside from the base wall portion of the outer frame body.
4 vertical and horizontal inner frame members having base walls that are substantially parallel to each other
It is framed in a rectangular shape by one inner frame corner tool, and one of the four outer frame corner tools faces the other outer frame corner tool.
-The tool is provided with the pair of opening / closing shafts and has a shaft.
An outer frame corner tool configured as a corner tool and facing the other
Closes the inner frame when the inner frame is closed.
The stopper with the stopper is installed at the position.
-It is configured as a tool and is formed at the tip of the opening / closing shaft outside the base wall portion of the inner frame.
The formed collar is rotatable and slidable, and the base of the outer frame is
The fitting groove that opens toward the wall is formed by the upper and lower protruding edges.
Formed on the upper protruding edge, the notch into which the opening / closing shaft can be inserted and removed.
-Shaped openings are formed, and the inner frame corner tool is formed in each of the vertical and horizontal inner parts that form the inner frame body.
Among the frame materials, the fitting groove of the base wall portion in the adjacent inner frame material
The wing-shaped connecting plate that is inserted and connected across the
An end of the wing-shaped connecting plate that has the flange portion of the opening / closing shaft and faces the flange portion of the opening / closing shaft.
The portion has a bearing recess on which the collar is rotatably abutted.
Formed ceiling access port. 3. The ceiling inspection port according to claim 2 , wherein:
A ceiling inspection port in which a bearing recess formed at the end of the wing-shaped connecting plate of the inner frame corner tool is formed in a concave arc shape having a radius substantially the same as the radius of the flange of the opening / closing shaft. 4. The ceiling inspection port according to claim 1 or 2, wherein the inside and outside of the base wall portion of each of the outer and vertical outer frame members of the outer frame body is opened toward the base wall portion of the inner frame body. The fitting groove is formed by the upper and lower projecting edges, and the shaft-equipped and stopper-equipped corner tools straddle the fitting groove of the base wall portion of the adjacent outer frame member among the vertical and horizontal outer frame members. In the corner device with stopper, a stopper piece forming a stopper portion for stopping the inner frame body at the closed position is bent at the tip of the blade-like connecting plate. Ceiling inspection port that is integrally formed by processing. 5. The ceiling inspection port according to claim 4 ,
The wing-shaped connecting plate of the corner device with a stopper is a ceiling inspection port provided with a projecting protrusion that projects toward the base wall of the inner frame and guides the opening and closing of the inner frame. 6. Attached to an opening formed in a ceiling plate.
The outer frame body and the pair of open / close shafts are attached to the opening of the outer frame body.
Ceiling point with an inner frame body that can be opened and closed
In the inspection, the outer frame is a base wall along the inner peripheral surface of the opening of the ceiling plate.
Each vertical and horizontal outer frame member has four outer frame corner tools.
The inner frame body has a predetermined gap inside from the base wall portion of the outer frame body.
4 vertical and horizontal inner frame members having base walls that are substantially parallel to each other
It is framed in a rectangular shape by one inner frame corner tool, and one of the four outer frame corner tools faces the other outer frame corner tool.
-The tool is provided with the pair of opening / closing shafts and has a shaft.
An outer frame corner tool configured as a corner tool and facing the other
Closes the inner frame when the inner frame is closed.
The stopper with the stopper is installed at the position.
-It is configured as a tool, and between the mutual base wall portions of the outer frame body and the inner frame body,
A locking device is provided to keep the inner frame closed.
The locking device has one of the inner frame body and the outer frame body.
Locking rotatably mounted on the base wall of one of the frames
The shaft and a locking plate provided near the lower part of the locking shaft, and the other
Is provided in a protruding shape within the height of the base wall portion of the frame body, and
A ceiling inspection port, comprising: an engaging portion that engages with the locking plate in a detachable manner . 7. Attached to an opening formed in a ceiling plate.
The outer frame body and the pair of open / close shafts are attached to the opening of the outer frame body.
Ceiling point with an inner frame body that can be opened and closed
In the inspection, the outer frame is a base wall along the inner peripheral surface of the opening of the ceiling plate.
Each vertical and horizontal outer frame member has four outer frame corner tools.
The inner frame body has a predetermined gap inside from the base wall portion of the outer frame body.
4 vertical and horizontal inner frame members having base walls that are substantially parallel to each other
It is framed in a rectangular shape by one inner frame corner tool, and one of the four outer frame corner tools faces the other outer frame corner tool.
-The tool is provided with the pair of opening / closing shafts and has a shaft.
An outer frame corner tool configured as a corner tool and facing the other
Closes the inner frame when the inner frame is closed.
The stopper with the stopper is installed at the position.
-It is configured as a tool, and between the mutual base wall portions of the outer frame body and the inner frame body,
A locking device is provided to keep the inner frame closed.
The locking device can be rotated outside the base wall of the inner frame.
The locking shaft attached to the
Lock plate provided around the axis of the lock shaft,
Is it provided so as to project inward within the height of the base wall of the external frame?
And an engaging portion that releasably engages with the locking plate, and the locking plate is moved by rotating the locking shaft.
From the locking position that engages with the engaging portion of the outer frame and the engaging portion
A ceiling inspection port that is configured to be switched to the unlocked position where it is released . 8. Attached to an opening formed in a ceiling plate.
The outer frame body and the pair of open / close shafts are attached to the opening of the outer frame body.
Ceiling point with an inner frame body that can be opened and closed
In the inspection, the outer frame is a base wall along the inner peripheral surface of the opening of the ceiling plate.
Each vertical and horizontal outer frame member has four outer frame corner tools.
The inner frame body has a predetermined gap inside from the base wall portion of the outer frame body.
4 vertical and horizontal inner frame members having base walls that are substantially parallel to each other
It is framed in a rectangular shape by one inner frame corner tool, and one of the four inner frame corner tools faces the other inner frame corner tool.
-The tool is provided with the pair of opening / closing shafts and has a shaft.
Co - is configured as a burner device, wherein the four outer frame co - Of Na instrument, the shaft with co - Na instrument anti
The outer frame corner tools facing each other on the opposite side have the inner frame body closed.
Stopper that stops the inner frame at the closed position when
Is provided as a corner tool with a stopper, and a front part is provided between base wall parts of the outer frame body and the inner frame body.
A locking device is provided to keep the inner frame closed.
The locking device has one of the inner frame body and the outer frame body.
Locking rotatably mounted on the base wall of one of the frames
The shaft and a locking plate provided near the lower part of the locking shaft, and the other
Is provided in a protruding shape within the height of the base wall portion of the frame body, and
A ceiling inspection port, comprising: an engaging portion that engages with the locking plate in a detachable manner . 9. Attached to an opening formed in a ceiling plate.
The outer frame body and the pair of open / close shafts are attached to the opening of the outer frame body.
Ceiling point with an inner frame body that can be opened and closed
In the inspection, the outer frame is a base wall along the inner peripheral surface of the opening of the ceiling plate.
Each vertical and horizontal outer frame member has four outer frame corner tools.
The inner frame body has a predetermined gap inside from the base wall portion of the outer frame body.
4 vertical and horizontal inner frame members having base walls that are substantially parallel to each other
It is framed in a square by one inner frame corner tool.
Out of the inner frame corner tools, the inner frame corner tools facing each other
Is provided with the pair of open / close shafts,
Is configured as a tool, the four outer frame co - Of Na instrument, the shaft with co - Na instrument anti
The outer frame corner tools facing each other on the opposite side have the inner frame body closed.
Stopper that stops the inner frame at the closed position when
Is provided as a corner tool with a stopper, and a front part is provided between base wall parts of the outer frame body and the inner frame body.
A locking device is provided to keep the inner frame closed.
The locking device can be rotated outside the base wall of the inner frame.
The locking shaft attached to the
Lock plate provided around the axis of the lock shaft,
Is it provided so as to project inward within the height of the base wall of the external frame?
And an engaging portion that releasably engages with the locking plate, and the locking plate is moved by rotating the locking shaft.
From the locking position that engages with the engaging portion of the outer frame and the engaging portion
A ceiling inspection port that is configured to be switched to the unlocked position where it is released . 10. The ceiling inspection port according to claim 7 , wherein the locking plate has a first stopper that comes into contact with the base wall portion of the inner frame when the locking plate is placed at the locking position. Department,
A ceiling inspection port, each of which is provided with a second stopper portion that comes into contact with the base wall portion of the inner frame when the locking plate is placed in the unlocked position.