JP2523475Y2 - Ceiling opening structure - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a ceiling opening structure applied to a ceiling of a building, and particularly to a ceiling opening for inspection and maintenance of facilities behind the ceiling. Regarding the structure.

[Problems to be solved by conventional technology and device]

In the ceiling of a building, for example, a high-rise building, a rectangular opening is formed for each predetermined floor, and this opening is usually closed. This type of opening is used to allow an operator to go up above the ceiling when inspecting equipment such as an air conditioner installed behind the ceiling or during maintenance.

For example, in the ceiling opening structure shown in FIG.
A rectangular door 104 is provided in the opening 102 of this 100.
Thus, the opening 102 was closed. A metal fitting such as a hinge 106 is attached to one side surface of the door 104, and a hook-shaped fastener 108 is provided on the opposite side surface. Fastener 1
Reference numeral 08 is adapted to be locked by a locking portion 110 provided on a peripheral portion of the opening 102. In the closed state of the door 104 to the opening 102, the closed state of the opening 102 is maintained by locking the fastener 108 to the locking portion 110.

However, in general, not only is there dust or dirt on the back of the ceiling 100 near the opening 102, but there are also cases where piping for air conditioning and the like are arranged, so that conventionally, the door 104 is pushed upward (arrow in FIG. 7). Instead of being rotated in the direction opposite to the direction A, it is configured to be rotated in the direction of lowering (direction of arrow A in FIG. 7).

For this reason, when rotating the door 104 in the direction of arrow A in FIG. 7, the operator had to fend his head so as not to hit the rotating door 104. Therefore, a worker climbing on a stepladder or the like (not shown) must lose his or her posture when rotating the door 104, and there is a problem that the work is hindered.

The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a ceiling opening structure that allows an operator to open a ceiling opening without losing posture.

[Means for solving the problem]

The present invention is a ceiling opening structure for opening and closing an opening provided in a part of a ceiling, and is provided on a back surface side of the ceiling and arranged along a side edge of the opening as a longitudinal direction, and further includes a bottom portion. A pair of guide rails having a first notch and a second notch provided alternately with a groove formed along the longitudinal direction at the center, and a plate-like shape capable of closing an opening; A closing portion having a first roller and a second roller alternately provided corresponding to the first notch and the second notch and inserted into the guide rail through each notch. The first roller and the second roller are configured such that the first roller and the second roller close the opening such that the indoor surface of the ceiling and the indoor surface of the closing portion are substantially flush with each other. Through the first notch and the second notch located immediately above Sliding up and down between the position immediately above the opening to be inserted into the rail, and sliding along the guide rail in the direction of the ceiling along the guide rail from the position immediately above the opening to a second position to open the opening; It is characterized by.

[Action]

According to the above configuration, in order for the worker to go up through the ceiling through the opening, the user first slides the closing portion upward from the first position to a position immediately above the opening. At this time, the first roller and the second roller provided alternately in the closing portion are inserted into the guide rail through the first notch and the second notch provided alternately in the guide rail. You. Next, the closing part is slid along the guide rail from the position immediately above the opening to the second position in the surface direction of the ceiling. On this occasion,
The closing portion slides as the first roller and the second roller roll on the bottom of the guide rail. Thereby, the opening of the ceiling is opened, and the worker can go up to the ceiling through the opening.

On the other hand, when closing the opening of the ceiling, for example, after the worker finishes the work in the back of the ceiling and gets down from the back of the ceiling, for example, on a stepladder or the like, first, the closing portion is moved from the second position to the position immediately above the opening. Slide in the direction of the plane. Thereby, the first roller and the second roller of the closing portion correspond to the first notch and the second notch of the guide rail. Next, the closing portion is slid downward from the position immediately above the opening to the first position so that the first roller and the second roller pass through the first notch and the second notch. Thereby, the opening of the ceiling is closed.

As described above, in the present invention, the closing portion is provided so as to be slidable in the vertical direction with respect to the opening and slidably in the surface direction along the back surface of the ceiling. Will not break.

Moreover, in the present invention, when the closing portion is located at the first position, the surface of the ceiling on the indoor side and the surface of the closing portion on the indoor side are substantially flush with each other. The appearance quality can be improved.

Further, in the present invention, when the closing portion slides along the guide rail in the surface direction of the ceiling, the first roller and the second roller provided in the closing portion roll on the bottom of the guide rail. Therefore, the sliding resistance is reduced as compared with the case where the closing portion is slid without using such a roller.
Accordingly, the operability of sliding the closing portion in the surface direction can be improved.

In addition, the first roller and the second roller, and the first notch and the second notch are both provided alternately, that is, the first notch and the second notch are on the same track. Therefore, the first roller does not come off from the second notch or the second roller does not come off from the first notch when the closing portion slides in the surface direction.

[Effect of the invention]

As described above, the ceiling opening structure according to the present invention is:
This has an excellent effect that the worker can open the ceiling opening without losing his posture.

Further, the ceiling opening structure according to the present invention has an excellent effect that the appearance quality of the ceiling viewed from the indoor side when the opening of the ceiling is closed by the closing portion can be improved.

Further, in the ceiling opening structure according to the present invention, the first roller and the second roller provided in the closing portion roll on the bottom of the guide rail to slide the closing portion in the surface direction. Has an excellent effect that the slide operability in the surface direction can be improved.

Further, in the ceiling opening structure according to the present invention, the first roller and the second roller provided in the closing portion and the first notch and the second notch provided in the guide rail are provided alternately. This has an excellent effect that the first roller and the second roller can be prevented from derailing.

〔Example〕

FIG. 6 shows a ceiling 10 to which the ceiling opening structure according to the present invention is applied. The ceiling 10 has a rectangular opening 12 formed in a part thereof. At the periphery of this opening 12,
A frame-shaped support frame 14 is fitted from the indoor side. Support frame
Each of the four side frame portions 14A, 14B, 14C, and 14D has an inverted T-shaped cross section at right angles to the longitudinal direction (see FIGS. 1 and 2).

As shown in FIGS. 6 and 4, on the back side of the ceiling 10, a pair of guide rails 16 and 18 are disposed at positions adjacent to the frame portions 14A and 14B which are in the longitudinal direction. Each of the guide rails 16 and 18 is supported on the ceiling by supporting means (not shown). The guide rails 16 and 18 are formed by bending a rectangular steel plate in the width direction so that the cross section in the width direction has a hollow shape. Grooves 20 and 22 are formed along the longitudinal direction of the guide rails 16 and 18 at the center of the indoor side wall of the guide rails 16 and 18.

Further, rectangular notches 24 and 26 are formed in the indoor side walls of the guide rails 16 and 18 near one end of the guide rails 16 and 18 in the longitudinal direction. These notches 24, 26 are grooves
It is connected to 20, 22 respectively. Also, guide rail
A pair of cutouts 28 and 30 having the same shape as the cutouts 24 and 26 are formed in the vicinity of the longitudinal middle portions of the cutouts 16 and 18 on the indoor side surface, and communicate with the grooves 20 and 22 respectively. However, as shown in FIGS. 3 and 4, the notches 24 and 26 are formed on the side of the guide rails 16 and 18 on the side away from the opening 12 of the ceiling 10 of the indoor side wall. , 30 are formed on the side adjacent to the opening 12 of the ceiling 10 on the indoor side walls of the guide rails 16, 18.

In the opening 12 of the ceiling 10, a panel 32 is arranged. The panel 32 is a rectangular flat plate, and its indoor side surface has the same design surface as the indoor side surface of the ceiling 10. The panel 32 is placed in close contact with the support frame 14. A frame-shaped retainer 34 shown in FIG.
Is fitted. Frame parts 34A, 34B of four sides of retainer 34,
Each of 34C and 34D has an inverted L-shape that partially projects to the back side of the ceiling 10.

In the vicinity of one end of the frame portions 34A, 34B, which are the longitudinal direction of the retainer 34, L-shaped support plates 36, 38 are erected toward the back side of the ceiling 10, respectively. Pins 52 (see FIG. 5B) are provided on the upper portions of these support plates 36 and 38,
Pins 54 (see FIG. 5 (A)) project at right angles to the support plates 36, 38, and rollers 40, 42 are pivotally supported by these pins 52, 54. Further, as shown in FIG. 3, supporting plates 44 and 46 having the same configuration are provided upright near the other ends of the frame portions 34A and 34B which are the longitudinal direction of the retainer 34, and rollers 48 are provided respectively. , 50 are supported. However, the rollers 48 and 50 are pivotally supported on the surfaces of the support plates 36 and 38 on the side away from the opening 12. The thickness of the support plates 36, 38 and 40 42 is slightly smaller than the width of the grooves 20 and 22 (see FIGS. 5A and 5B).

As shown in FIG. 3 and FIG.
In a state where the opening 12 is closed, the rollers 40 and 42 provided on the side close to the opening 12 and the above-described notches 28 and 30 are positioned so as to overlap in a plan view. Similarly, the rollers 48 and 50 provided on the side away from the opening 12 and the notches 24 and 26 are positioned so as to overlap in plan view.

As shown in FIG. 1, in the panel 32 described above, the position where the panel 32 is placed on the support frame 14 (the position shown by the two-dot chain line in FIG. 1) is the first position. When the panel 32 is located at the first position, the indoor surface of the panel 32 and the indoor surface of the ceiling 10 are flush with each other. In addition, the position of the panel 32 shown by a solid line in FIG. 1, that is, the rollers 40, 42, 48, 50
The position passing through 30, 24, 26 and inserted into the guide rails 16, 18 is the position immediately above the opening in the present invention. From the first position to the position immediately above the opening, the panel 32 is the first position of the operator.
It slides upward by the pressing force in the direction of arrow B in the figure.

Further, a position where the panel 32 is completely hidden by the ceiling 10 when viewed from the indoor side (a position indicated by a dashed line in FIG. 1) is a second position. Then, from the position immediately above the opening to the second position, the panel 32 slides in the surface direction along the back surface of the ceiling 10 by the pressing force in the first arrow C direction by the operator.

 Hereinafter, the operation of the present embodiment will be described.

In order for the worker to climb the stepladder (not shown) and slide the panel 32 to open the opening 12, first the panel 32 is moved to the first position.
The panel 32 is slid from the first position to a position immediately above the opening by pressing in the direction of arrow B in the figure. This allows the panel
32 rollers 40, 42, 48, 50 are cutouts 28, 30, 24,
The guide rails 16 and 18 are accommodated in the guide rails 16 and 18 respectively.

Next, the operator slides the panel 32 slightly from the position immediately above the opening in the direction of arrow C in FIG. As a result, the four rollers 40, 42, 48, and 50 of the panel 32 are grounded on the upper surfaces of the indoor side walls of the guide rails 16 and 18 (see FIGS. 5A and 5B). Thereafter, as shown in FIG. 6, the operator slides the panel 32 further in the direction of arrow C in FIG. 1 to the second position. As a result, the opening 12
Is opened, and the worker can go up through the opening 12 to the back side of the ceiling 10 to perform work.

Next, in a case where the panel 32 is slid from the second position to the first position, for example, when the operator finishes the operation on the back side of the ceiling 10, an operation reverse to the above-described operation may be performed. That is, the operator slides the panel 32 from the second position to the position immediately above the opening, and then slides the panel 32 from the position directly above the opening to the first position while supporting the panel 32 by hand, and inserts the panel 32 into the support frame 14. Place.

As described above, in the present embodiment, since the opening 12 of the ceiling 10 is configured to be opened by sliding the panel 32, the operator can easily open the opening 12 without losing posture. . For this reason, the working efficiency of the worker can be improved.

Further, in the present embodiment, since only the mechanical configuration is used, the structure can be simplified, and the durability can be improved.

Further, in this embodiment, the indoor side surface of the panel 32 and the ceiling 10
Since the indoor side surfaces are flush with each other, the appearance quality of the ceiling 10 viewed from the indoor side can be improved.

Further, in this embodiment, since the panel 32 is placed in close contact with the frame portions 14A, 14B, 14C, and 14D constituting the support frame 14, the sealing property between the panel 32 and the ceiling 10 is excellent. . For this reason, the air and the like staying in the space behind the ceiling 10 do not flow into the room, which can contribute to the improvement of the air conditioning effect.

Furthermore, since the load of the panel 32 is supported by the guide rails 16 and 18 when the opening 12 of the panel 32 is open,
The hinge 106 is rotated by rotating the door 104 (see FIG. 7) as in the prior art.
The panel 32 can be reliably supported in a stable state as compared with a structure in which the panel 32 is supported by metal fittings such as. When the opening 12 is closed by the panel 32, the load on the panel 32 is supported by the support frame 14, so that the panel
32 can be reliably supported in a stable state.

In the present embodiment, rollers 40, 42, 48, and 50 are provided near the four corners of the retainer 34 of the panel 32, and these rollers 4
Since the panel 32 is slid along the surface direction of the ceiling 10 by rolling the 0, 42, 48, 50 along the guide rails 16, 18, the rollers 40, 42, 48, 50 are used. The sliding resistance is reduced as compared with a case where the panel 32 is directly slid along the guide rails 16 and 18 without using the panel. Therefore, the operability of sliding the panel 32 in the surface direction can be improved.

Further, in the present embodiment, the notches 24, 26 and the notches 28, 30 formed in the guide rails 16, 18 are arranged on different tracks, and the rollers 40, 42 are provided in the openings 12 of the support plates 36, 38. Rollers 48 and 50 are supported on the supporting plate
Since the cutouts 24, 26 and the cutouts 28, 30 are alternately arranged, the rollers 48, 50 and the roller 40 ,
42 and staggered, so rollers 40, 42, 48, 50
From the notches 24, 26, 28, 30 can be prevented.

In the present embodiment, the support frame 14 is fitted into the opening 12 of the ceiling 10 from the indoor side, but each frame portion 14A, 14B, 14C, 14D
The support frame 14 is slightly embedded in the ceiling 10 so that the lower surface of the indoor side wall is flush with the indoor side surface of the ceiling 10 and the panel is
A step may be provided on the indoor side surface of the support frame 32 so as to be flush with the indoor side surface of the support frame 14. In this case, a complete flush structure can be obtained. Further, a decorative frame material may be applied as the support frame 14 to give a design effect such as giving an accent to the ceiling 10.

In the present embodiment, the panel 32 is slid by a mechanical structure. However, the present invention is not limited to this, and traction means (wires or the like) interlocked with a motor is attached to the guide rails 16 and 18 and the panel 32, and An electrical configuration may be adopted in which limit switches and the like are provided at both ends, and when the operation switch is turned on, the panel 32 is pulled by the driving force of the motor and the opening 12 is opened. Furthermore, an infrared sensor or the like may be provided so that the panel 32 slides by remote control operation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line II of FIG. 3 showing a state in which the panel according to the present embodiment is cut along the longitudinal direction, and FIG.
FIG. 3 is a sectional view taken along the line II-II of FIG. 3 showing a state where the panel shown in FIG. 3 is cut along the width direction. FIG. 3 is a plan view showing the panel shown in FIG. FIG. 5 (A) is a partially exploded perspective view showing the retainer and the guide rail of FIG. 1;
Indicates a state in which the rollers are accommodated in the guide rails.
FIG. 5B is an enlarged cross-sectional view taken along the line V (B) of FIG. 2 corresponding to FIG. 5A, and FIG. FIG. 7 is a perspective view showing a state where an operator is sliding a panel, and FIG. 7 is a perspective view corresponding to FIG. 6 showing a ceiling opening structure according to a conventional example. 10 …… Ceiling, 12 …… Opening, 16 …… Guide rail, 18 ……
Guide rail, 20 groove, 22 groove, 24 notch (first notch), 26 notch (first notch), 28
Notch (second notch), 30 ... notch (second notch), 32 ... panel (closed part), 34 ... retainer (closed part), 40 ... roller (second roller) ), 42 ... roller (second roller), 48 ... roller (first roller), 50
... Roller (first roller).

Claims (1)

(57) [Scope of request for utility model registration] 1. A ceiling opening structure for opening and closing an opening provided in a part of a ceiling, the ceiling opening structure being provided on a back side of the ceiling and arranged along a side edge of the opening as a longitudinal direction. A pair of guide rails having a first notch and a second notch provided alternately with a groove formed in the center of the bottom along the longitudinal direction, and formed in a plate shape capable of closing an opening. And a closing portion having a first roller and a second roller which are provided alternately corresponding to the first notch and the second notch and are inserted into the guide rail through each notch, The first roller and the second roller are provided from a first position for closing the opening such that the indoor surface of the ceiling and the indoor surface of the closing unit are substantially flush with each other. Through the first notch and the second notch located just above Sliding up and down between the position just above the opening to be inserted into the guide rail, and sliding along the guide rail in the direction of the ceiling along the guide rail from the position just above the opening to a second position to open the opening; An opening structure for a ceiling, characterized in that: