JP3311585B2 - inspection door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection port such as a ceiling inspection port or a floor / wall inspection port.

[0002]

2. Description of the Related Art For example, Japanese Patent Laid-Open No.
The structure disclosed in 230990 is known.
In this case, as shown in FIG. 13, of the opposing side surfaces of the outer frame body 111 and the inner frame body 121, the inner shaft of the outer frame body 111 has a pivot shaft serving as an opening and closing fulcrum of the inner frame body 121. 12
7 is attached and projected by a screw 128.
A guide groove 116 is formed on the outer surface of the inner frame 121 so that a flange 127a formed at the protruding end of the rotation shaft 127 is rotatably and movably engaged with the upper and lower guide rails 115.
Is formed by Then, in a state where the locking mechanism is unlocked, the inner frame body 121 is opened around the rotation shaft 127 as a fulcrum with respect to the outer frame body 111, and the inner frame body 121 is moved closer to one side of the outer frame body 111. It is to be moved. Further, in order to attach and detach the inner frame body 121 to and from the outer frame body 111 at the inspection opening having the above-described structure, for example, a part of the upper guide rail 115 is cut away, so that the guide groove 11 is formed.
An opening for assembling and removing is formed in a part of 6.

[0003]

As described above, in the inspection opening having a structure in which an opening for assembly and removal is formed in a part of the guide groove 116, the inner frame is When the body 121 is opened and closed with the rotation shaft 127 as a fulcrum, the rotation shaft 127 relatively moves along the guide groove 116 and comes out of the opening for assembling and removing the guide groove 116. In some cases, the inner frame 121 may unexpectedly separate from the outer frame 111. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an inspection port capable of reliably preventing a rotation shaft from being pulled out of an opening for assembling and removing a guide groove.

[0004]

According to a first aspect of the present invention, there is provided an inspection port in which an inner frame having an inner lid plate is openably and closably mounted on an outer frame. And an inspection port held in a closed state by a locking mechanism, wherein one of the opposing side surfaces of the outer frame body and the inner frame body has a pivot that forms an opening / closing fulcrum of the inner frame body. A shaft is protruded, and a guide groove is formed on the other side surface so that the rotation shaft is rotatably and movably engaged with the rotation shaft. A part of the guide groove includes the rotation shaft with respect to the guide groove. An opening for assembling / removing is formed so as to be able to be inserted and removed, and a stopper member for stopping the rotation shaft is attached near the opening. Therefore, when the inner frame body is opened and closed with respect to the outer frame body with the rotation axis as a fulcrum, the rotation shaft is reliably prevented from coming out of the opening for mounting and removing the guide groove by the retaining member. can do.

According to a second aspect of the present invention, there is provided the inspection port according to the first aspect, wherein the retaining member is configured to prevent the rotation shaft from being removed from the opening for assembly and removal. The arrangement is switched between a first position and a second position allowing insertion and removal of the rotation shaft. Therefore, by disposing the retaining member at the first position, it is possible to prevent the rotation shaft from being removed from the assembling / removing opening. In addition, since the retaining member is disposed at the second position, the rotating shaft can be easily inserted into and removed from the opening for assembly and removal.
The inner frame can be easily attached to and detached from the outer frame without being disturbed by the retaining member.

According to the third aspect of the present invention, there is provided an inspection port.
In the inspection opening described in the above, the retaining member is moved along the long hole formed in parallel with the opening for assembling / removing, so that the retaining member stops the rotation shaft. The arrangement is switched between a first position and a second position allowing insertion and removal of the rotating shaft. Therefore, by moving the retaining member along the elongated hole, the arrangement can be easily and accurately switched between the first position and the second position.

The inspection port according to the invention of claim 4 is the inspection port of claim 3.
Wherein the retaining member is movable along the long hole by loosening the tightening screw, and is tightened and fixed at a required position by tightening the tightening screw. The member is integrally provided with a stopper piece which comes into contact with the rotating shaft to prevent the removal. Therefore, by loosening the tightening screw, the retaining member can be moved along the long hole, and by tightening the tightening screw, the retaining member can be tightened and fixed at a required position. The operation of switching the arrangement of the stop member between the first position and the second position can be performed quickly and easily.

According to a fifth aspect of the present invention, there is provided the inspection port according to the first aspect, wherein a plurality of plate thickness adjusting support portions are vertically arranged on the inner surface of the inner frame. The support member, which is attached to the inner side surface of the inner frame and supports the inner lid plate, is formed with a plurality of locking portions which selectively engage with the plurality of plate thickness adjusting support portions. Accordingly, by selectively engaging the plurality of locking portions of the support member with the plurality of plate thickness adjustment support portions of the inner frame body and assembling the support member on the inner side surface of the inner frame body, the support of the inner frame body is improved. Even when the thickness of the inner lid plate supported by the member is variously different, it is possible to satisfactorily cope with the inner lid plate, and the inner frame is formed by the engagement force between the plurality of thickness adjusting support portions and the plurality of locking portions. It is possible to reliably prevent the support member from being moved unexpectedly in the vertical direction of the body side.

The inspection port according to the invention of claim 6 is the inspection port of claim 1.
In the inspection port described in the above, the locking mechanism is a lock piece with a locking / unlocking stopper piece that is removably inserted into the lock hole of the outer frame body from the inner frame body side, and the locking piece is rotated to operate. An operating shaft for locking and unlocking, wherein the operating shaft is rotatably mounted on the inner surface of the inner frame body, and a tip end thereof can be operated by passing through a shaft hole of the inner lid plate. And a cap for closing the shaft hole is provided at the tip of the operation shaft. Therefore, the appearance can be improved by closing the shaft hole of the inner lid plate with the cap provided at the tip of the operation shaft of the locking mechanism.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. In FIG. 4, which shows a ceiling inspection port as an inspection port in a plane, FIG. 5 in a cross section based on the line VV in FIG. 4, and FIG. 6 in a cross section along the line VI-VI in FIG. The mouth 1 has an outer frame 11,
The inner frame 21 and the inner frame 21 are the main components. For convenience of description, the vertical direction in FIG. 4 is referred to as vertical, and the horizontal direction is referred to as horizontal. The outer frame body 11 is configured to be framed in a rectangular shape by vertical and horizontal frame members 12 and 13 and corner fittings (not shown). It is fitted into the opening 3 of the ceiling plate 2 of the building, and is suspended and supported by a suspension mechanism 5 with respect to a mounting member 4 disposed behind the ceiling.

The vertical and horizontal frame members 12 and 13 constituting the outer frame body 11 are substantially the same by extruding a light alloy such as an aluminum alloy or bending a metal plate such as a stainless steel plate. A pair of upper and lower projecting edges 14 are formed on the upper outer surface of each of the frame members 12 and 13 so as to protrude horizontally, respectively, and are formed on the upper inner surface of each of the frame members 12 and 13. A pair of upper and lower guide rails 15 having a hook-shaped cross section are provided in a protruding manner. Then, of the vertical and horizontal frame members 12 and 13,
A pair of upper and lower guide rails 15 of both vertical frame members 12 form a guide groove 16 for a rotating shaft described later. As shown in FIGS. 4 and 6, both horizontal frame members 13 of the outer frame 11 are provided.
A portion near the both ends in the longitudinal direction of the upper overhanging edge 14 in
At four positions, mounting brackets 6 of the suspension mechanism 5 are mounted by screws 7 or the like. The suspension mechanism 5
A hanging bolt 8 having a shaft portion 8a at a lower end portion rotatably inserted into the distal end cylindrical portion 6a of the mounting bracket 6, and a wing nut 9 screwed to the hanging bolt 8 so as to be able to advance and retreat. It is provided with a pair of upper and lower holding plates 10 which are adjustable and hold the mounting member 4 behind the ceiling from above and below.

The inner frame 21 is made up of vertical and horizontal frame members 22, 23.
And a corner fitting (not shown). Then, the inner frame body 21 is assembled to the outer frame body 11 so as to be openable and closable, and is held in a closed state by a locking mechanism 41. The vertical and horizontal frame members 22 and 23 constituting the inner frame body 21 have substantially the same cross-sectional shape by using an extruded material of a light alloy such as an aluminum alloy or a bent material of a metal plate such as a stainless steel plate. While being formed, the lower frame portion 24,
An inner overhang portion 25 that extends horizontally inward from the upper edge of the lower frame portion 24, and an upper frame portion 26 that vertically projects upward from the tip of the inner overhang portion 25; And has a substantially crank-shaped cross section.

The inner frame 21 is provided with an inner frame 21 on an outer surface of both vertical frame members 22 of the inner frame 21 near one longitudinal end of the upper frame 26.
The pivot shafts 27 forming the opening / closing fulcrum are respectively protruded on the same center line. Both pivot shafts 27 have their base ends fixed to the upper frame 26 by caulking or mounting screws, and have large-diameter flanges 27a formed at the distal ends of both pivot shafts 27. The flanges 27a of the two rotating shafts 27 are inserted into the guide grooves 16 of both the vertical frame members 12 of the outer frame body 11 and are rotatably and movably engaged with each other.
On the other hand, the inner frame 21 is assembled so as to be openable and closable about the rotation shaft 27 as a fulcrum.

In order to removably attach the inner frame 21 to the outer frame 11, a part of the guide groove 16 in each of the vertical frame members 12 of the outer frame 11 has a guide rail on the upper side thereof. The opening 28 for assembling / removing is formed by cutting out a part of 15. As shown in FIGS. 1 and 2, at least one or both of the vertical frame members 12 of the outer frame body 11 have openings 28 for assembling and removing the guide grooves 16. , A retaining member 31 is attached to the rotating shaft 27 so as to prevent the rotating shaft 27 from being accidentally removed from the opening 28 for assembling and removing. That is, in this embodiment, at least one of the two vertical frame members 12 of the outer frame 11
2, a long hole 29 for movably assembling the retaining member 31 in parallel with the assembling / removing opening 28 is provided.

On the other hand, the retaining member 31 has a flat plate-like substrate portion 32 having a withdrawal width inserted between the upper and lower overhanging edges 14 of the outer frame body 11, and a rectangular shape from one end of the substrate portion 32. Stopper piece 33 protruding from and inserted movably into long hole 29
And are integrally provided. Further, a boss portion 32 a having a female screw at the center is formed in the substrate portion 32, and a tightening screw 30 is inserted from the inner surface of the vertical frame member 12 through the elongated hole 29.
Is screwed into the boss portion 32 a of the substrate portion 32, so that the retaining member 31 is movably attached to the outer frame 11 along the elongated hole 29. And
As shown in FIG. 3B, the retaining member 31 is disposed at the first position where the stopper piece 33 abuts one end 29a of the elongated hole 29, so that the assembling / removing opening 28 is provided. Of the rotation shaft 27 with respect to the stopper piece 3
3 ensures this. Further, as shown in FIG. 3A, the retaining member 31 is disposed at a second position in contact with the other end 29b of the elongated hole 29 in the shaft portion of the tightening screw 30 so as to assemble. The rotation shaft 27 can be easily inserted into and removed from the removal opening 28 without interfering with the stopper piece 33.

As shown in FIG. 4, a locking mechanism 41 for removably holding the inner frame 21 in a closed state with respect to the outer frame 11 is provided by a locking mechanism 41 of both the horizontal frame members 23 of the inner frame 21. The rotating shaft 29 is disposed so as to straddle between the horizontal frame member 23 on the far side from the center of the rotating shaft 29 and the horizontal frame member 13 of the outer frame body 11 facing the horizontal frame member 23. As shown in FIG. 6 and FIG.
Is inserted into and removed from a slot-shaped through hole 41 formed in the upper frame portion 26 of the horizontal frame member 23 of the inner frame member 21 into a lock hole 43 formed in the horizontal frame member 13 of the outer frame member 11. A lock piece 44 that can be inserted and an operation shaft 45 that rotates and locks / unlocks the lock piece 44 are integrally provided.

The operating shaft 45 is provided on the horizontal frame 2 of the inner frame 21.
3 is rotatably supported by a bearing member 48 attached to the inner side surface of the upper frame portion 26 by a screw 49, and the tip end (lower end portion) of the shaft of the inner lid plate 51 attached to the inner frame body 21. The operation shaft 4 is operably exposed through the hole 43.
An operation groove 45a into which a driver, a coin, or the like is inserted and operated to rotate is recessed in the distal end surface of the fifth member 5. Also,
A cap 47 for closing the shaft hole 46 of the inner lid plate 51 is attached to the tip of the operation shaft 45a by press fitting. The cap 47 has an elliptical cylindrical press-fitting cylinder portion 47a having a longer diameter portion slightly larger than the outer diameter of the operation shaft 45 and a shorter diameter portion slightly smaller than the outer diameter of the operation shaft 45, and an outer peripheral surface of one end portion of the press-fitting cylinder portion 47a. And a cap portion 47b integrally protruding therefrom. Then, from the tip end side of the operation shaft 45, the cap 4
7 is press-fitted in the press-fitting cylinder portion 47a,
The cap 47 is securely attached to the operation shaft 45.

In the first embodiment, the lock 4
A locking stopper piece 44a and an unlocking stopper piece 44b that contact the inner surface of the upper frame portion 26 of the horizontal frame member 23 of the inner frame body 21 are formed on the lower surface of the inner member 21 by pressing or the like. Stopper piece 44a and unlocking stopper piece 4
By 4b, the arrangement of the lock piece 44 is reliably switched between the locked position shown in FIG. 8A and the unlocked position shown in FIG. 8B.

As shown in FIG. 5 and FIG.
The inner lid plate 51 is assembled by a required number of support members 54 in the frame. The support member 54 includes a support piece 55 attached by screws 60 along the upper frame portions 26 of the frame members 22 and 23 of the inner frame body 21, and extends horizontally from the lower end of the support piece 55 inward. It is integrally formed with a mounting piece 56 to which the inner lid plate 51 is attached and is formed to have a substantially L-shaped cross section. Further, as shown in FIGS. 9A to 9F, the inner lid plate 51 is constituted by a superimposed plate of the base plate 52 and the finishing plate 53, or is constituted only by the finishing plate 53, and has various standards. Even if the thicknesses H1 to H6 of the inner frame 21 are variously different, the various thicknesses H1 to H6
In order to selectively assemble the inner lid plates 51 having different thicknesses, a plurality of plate thickness adjusting support portions 57 are vertically arranged on the inner surface of the upper frame portion 26 of each of the frame members 22 and 23 of the inner frame body 21. On the other hand,
On the outer surface of the support piece 55 of the support member 54, a plurality of locking portions 5 selectively engaging with the plurality of plate thickness adjusting support portions 57 are provided.
8 are formed. Then, after each locking portion 58 of the support member 54 is selectively engaged with the upper surface or the lower surface of each plate thickness adjusting support portion 57 of the inner frame body 21 and positioned in the height direction, the inner frame body 21 Upper frame portion 26 in each of the frame members 22 and 23
And the supporting piece 55 of the supporting member 54 are tightened by the screw 60, so that the inner lid plate 5 having various thicknesses H1 to H6 is varied.
1 can be assembled satisfactorily.

In this embodiment, FIGS.
As shown in (F), the thicknesses H1 to H6 of the inner lid plate 51 are provided.
However, in order to be able to selectively assemble, for example, six inner lid plates 51 which are increased in units of 3 mm, the inner surface of the upper frame portion 26 of each of the frame members 22 and 23 of the inner frame body 21 has While the two plate thickness adjusting support portions 57 are protrudingly provided at appropriate intervals in the vertical direction, the upper surface or the lower surface of each of the plate thickness adjusting support portions 57 is selected on the outer surface of the support piece 55 of the support member 54. The two upper and lower locking portions 58 which are engaged with each other are protruded.

In the first embodiment, as shown in FIGS. 4 and 5, the outer frame 11 is provided on the inner side near the other end in the longitudinal direction of both vertical frame members 12 of the outer frame 11. When the inner frame 21 is closed in the frame, the inner frame 21
A guide portion 61 having a substantially arc-shaped cross section for guiding and closing while positioning is provided, and at the upper end of each guide portion 61, a stopper abutting on the upper surface of the inner protruding portion 25 of the inner frame 21. A piece 62 protrudes.

This embodiment is configured as described above. Accordingly, when assembling the inner frame body 21 to the outer frame body 11, as shown in FIGS. The flange 27a of the rotating shaft 27 of the inner frame 21 guides the opening 28 for assembling and removing the outer frame 11 in a state where the flange 27a is located at the second position in contact with the other end 29b. It is moved into the groove 16. Thereafter, as shown in FIG. 3 (B), the retaining member 31 is inserted into the elongated hole 2 in the stopper piece 33 thereof.
9 is disposed at a first position abutting on one end 29a of the base member 9 and the fastening screw 30 is tightened to fix the retaining member 31 at the first position, thereby assembling the inner frame body 21 with the outer frame body 11. Is completed. And the outer frame 1
In contrast, the inner frame 21 is opened and closed with the rotation shaft 27 as a fulcrum. Then, as shown in FIG. 6, the inner frame 21 is closed with respect to the outer frame 11, and the lock piece 44 at the unlocked position shown in FIG. The inner frame 21 is locked in a closed state by rotating to the locking position shown in FIG.

When the inner frame body 21 is opened with respect to the outer frame body 11, the lock piece 44 is rotated by the operation shaft 45 to the unlocked position, and then opened about the rotation shaft 27 as a fulcrum. Then, the inner frame 21 is opened in a hanging state with respect to the outer frame 11, and the inner frame 21 is rotated by the rotation shaft 27 and the guide groove up to near one end of both the vertical frame members 22 of the outer frame 11. The opening of the outer frame body 11 is opened as large as possible by being guided and moved by 16. Further, the inner frame 21 is closed with respect to the outer frame 11 by operating in the reverse procedure. During the opening and closing operation of the inner frame body 21 with respect to the outer frame body 11, the flange 27a of the rotating shaft 27 is moved along the guide groove 16,
When the guide groove 16 is moved toward the assembling / removing opening 28, the flange 27 a of the rotating shaft 27 comes into contact with the stopper piece 33 of the retaining member 31 arranged at the first position. Since the above-described movement of the rotating shaft 27 is prevented, the flange 27a of the rotating shaft 27 is attached to the opening 2 for assembling and removing.
8 can be prevented from slipping out of the outer frame 11.
However, it is possible to reliably prevent the inner frame body 21 from accidentally detaching.

When it is necessary to remove the inner frame body 21 from the outer frame body 11, after the fastening screw 30 of the retaining member 31 is loosened, the retaining member 31 is moved to the shaft portion of the fastening screw 30. By moving to the second position abutting on the other end 29 b of the elongated hole 29, the flange 27 a of the rotating shaft 27 is attached to the stopper piece 33 of the retaining member 31 from the assembling / removing opening 28. Outer frame 1 to easily pull out without interference
1, the inner frame 21 can be easily removed.

In the above-described embodiment, of the opposing side surfaces of the outer frame 11 and the inner frame 21, the guide groove 16 and the opening 28 for assembling / removing are formed in the inner surface of the outer frame 11. Are formed, and the rotating shaft 27 is attached to the outer surface of the inner frame 21. However, the present invention is not limited to this, and the rotating shaft 27 is attached to the inner surface of the outer frame 11, Guide groove 1 inside
6, and an opening 28 for assembling and removing may be formed.
Further, the retaining member 31 is movably assembled by the elongated hole 29 and the tightening screw 30, but is not limited to this. For example, as shown in FIGS. 10 and 11, the guide groove 16 is attached to and removed from both ends of the retaining member 31.
8 are formed at both ends thereof with elastically engaging pieces 35 which are detachably engaged with each other.
The retaining member 31 may be removably assembled.

The suspension mechanism 5 is not limited to the suspension mechanism 5 having the structure described in the above embodiment.
Any structure that can suspend and support the outer frame body 11 with respect to the opening 3 of the ceiling plate 2 may be used. For example, as shown in FIG. 12, the suspension mechanism 5 may be configured by a support bracket 18 and a support bolt 19. That is, the supporting bracket 18 has a vertically extending leg 18a having an upwardly engaging locking claw 20 that engages with the mounting hole 11a of the outer frame body 11, and a supporting portion bent horizontally at the upper end of the leg 18a. 18b to form a substantially inverted L-shape. The outer frame body 11 is screwed into the support portion 18b of the support fitting 18 so that the lower end portion of the support bolt 19 abuts against the base portion 4 arranged behind the ceiling so as to be able to advance and retreat in the vertical direction. Hanging supported. The present invention is not limited to the ceiling inspection a, but may be a floor / wall inspection port.

[0027]

As described above, according to the present invention,
It is possible to reliably prevent the rotation shaft from being pulled out from the opening for mounting and removing the guide groove by the retaining member,
The problem that the inner frame body is accidentally detached from the outer frame body does not occur.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention and showing a state in which an inner frame body is assembled to an outer frame body, with a part thereof broken away.

FIG. 2 is a perspective view showing the relationship among a guide groove, an assembling / removing opening, and a retaining member.

FIG. 3 is an operation explanatory view showing a state in which the arrangement of the retaining member is switched between a first position and a second position.

FIG. 4 is a plan view showing the entire ceiling inspection port.

FIG. 5 is a sectional view based on the line VV of FIG. 4;

FIG. 6 is a sectional view based on the line VI-VI of FIG. 4;

FIG. 7 is a perspective view showing a relationship between a lock piece, an operation shaft, and a cap of the locking mechanism.

FIG. 8 is an operation explanatory view of the locking mechanism.

FIG. 9 is a cross-sectional view showing an assembling mode of the inner frame, the support member, and the inner lid plate.

FIG. 10 is a perspective view showing another embodiment of a retaining member.

FIG. 11 is an explanatory view showing a state where a retaining member is similarly assembled.

FIG. 12 is an explanatory view showing another embodiment of the suspension mechanism.

FIG. 13 is a cross-sectional view showing a relationship between an outer frame, an inner frame, a rotating shaft, and a guide groove in a conventional inspection.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceiling inspection port (inspection port) 11 Outer frame 16 Guide groove 21 Outer frame 27 Rotating shaft 28 Assembly / removal opening 29 Slot 30 Tightening screw 31 Detachment member 33 Stopper piece 41 Locking mechanism

Claims (6)

(57) [Claims] 1. An inspection port in which an inner frame provided with an inner lid plate is openably and closably attached to an outer frame and held in a closed state by a locking mechanism. Of the side surfaces facing the frame body, one of the side surfaces is provided with a pivot shaft that forms an opening and closing fulcrum of the inner frame body,
A guide groove is formed on the other side surface so that the rotation shaft is rotatably and movably engaged with the rotation shaft, and the rotation shaft is removably fitted in a part of the guide groove. An inspection port, wherein an opening for assembling / removing is formed, and a stopper member for stopping the rotation shaft is attached near the opening. 2. The inspection port according to claim 1, wherein the retaining member has a first position at which the rotation shaft is prevented from being removed from the assembling / removing opening, and the rotation shaft is inserted / removed. Second to allow
An inspection port characterized in that it is configured to be switched between positions. 3. The inspection port according to claim 2, wherein the retaining member is moved along an elongated hole formed in parallel with the assembling / removing opening so that the retaining member is moved. An inspection port, wherein the inspection port is configured to be switched between a first position at which a rotation shaft is prevented from being removed and a second position at which insertion and removal of the rotation shaft are permitted. 4. The inspection port according to claim 3, wherein the retaining member is movable along the elongated hole by loosening the tightening screw, and is tightened to a required position by tightening the tightening screw. An inspection port, wherein the stopper member is fixed, and the stopper member integrally has a stopper piece that contacts a rotating shaft to form a stopper. 5. The inspection port according to claim 1, wherein a plurality of plate thickness adjusting support portions are vertically arranged on an inner surface of the inner frame, and assembled on the inner surface of the inner frame. An inspection port, wherein a plurality of locking portions which are selectively attached to the plurality of plate thickness adjusting support portions are formed on a support member attached and supporting the inner lid plate. 6. The inspection port according to claim 1, wherein the locking mechanism includes a locking / unlocking stopper piece which is removably inserted from the inner frame side into a lock hole of the outer frame body, and An operating shaft that rotates and locks the lock to perform locking and unlocking, wherein the operating shaft is rotatably mounted on an inner surface of the inner frame body, and a tip end portion of the inner lid plate is provided. An inspection port, which is operably exposed through a shaft hole, and further provided with a cap for closing the shaft hole at a tip end of the operation shaft.