JPS639727Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is based on various wiring installed in the ceiling,
This invention relates to a ceiling inspection port that constitutes an entrance for inspecting piping and the area around the ceiling.

Conventionally, in a ceiling inspection opening, an inner frame body is attached to an outer frame body so as to be openable to the indoor side, and when the inner frame body is opened, the inner frame body hangs down from the outer frame body. For this reason, opening the inner frame may obstruct the indoor space and impede indoor work or traffic.
At times, the inner frame had a tendency to fall, leading to unexpected accidents.

In view of the above-mentioned reasons, an object of the present invention is to provide a ceiling inspection opening that can be opened only to the back side of the ceiling without opening the inner frame to the indoor side of the outer frame.

An embodiment of the present invention will be described below with reference to the drawings.

The ceiling inspection port 1 is mainly composed of an outer frame 2 and an inner frame 5 which is attached to the outer frame 2 with a predetermined fitting gap S therebetween and can be opened to the back side of the ceiling.

The outer frame body 2 includes left and right vertical frame rods 2A and 2B each having an inverted T-shape in cross section and including a horizontal piece and a vertical piece.
It is framed in a rectangular shape by front and rear horizontal frame rods 2C, 2D having the same cross-sectional shape as these vertical frame rods 2A, 2B. The horizontal pieces of each of the vertical and horizontal frame rods 2A to 2D form a horizontal frame shape, and among the portions forming the horizontal frame shape, the horizontal pieces of the vertical pieces of each of the frame rods 2A to D extend all around the outside of the lower edge. The horizontal frame-shaped portion is used as the abutting edge 3 that comes into contact with the surface (lower surface) of the ceiling board 13, while the horizontal frame-shaped portion is formed all around the inside of the lower edge of the vertical piece of each frame rod 2A to D. A closed receiving edge 4 receives the lower surface of the entire circumference of the inner frame body 5 in a closed state and closes the fitting gap S around the four circumferences between the outer frame body 2 and the inner frame body 5. It is said that In addition,
The above-mentioned outer frame body 2 is attached to anchors 22, 22 which are already installed in the ceiling through hanging fittings 21 to 21 arranged at four locations, the left and right ends of the vertical pieces of both horizontal frame rods 2C and 2D. It is hung against.

The inner frame body 5 is constructed of left and right vertical frame rods 5A, 5B each having an L-shape in cross section, and front and rear horizontal frame rods 5C, 5D having the same cross-sectional shape as these vertical frame rods 5A, 5B. It is framed in a rectangular shape that is slightly smaller than the frame body 2. The horizontal pieces of each of the vertical and horizontal frame rods 5A to 5D form a horizontal picture frame over all four circumferences inside the lower edge of the vertical pieces of each of the vertical pieces of the frame rods 5A to D, and the frame portion is used as a support frame 6. . A lid plate 24 made of the same material as the ceiling plate 23 is placed on the support edge 6. The lid plate 24 is held by presser pieces 25 to 25 each having an L-shaped cross section and fixed to the inner surface of each of the frame rods 5A to 5D of the inner frame body 5 via double-sided adhesive tape.

In contrast to the above-mentioned outer frame 2, the inner frame 5 is attached so that it can be opened only to the back side of the ceiling without being opened to the indoor side via the hinges 7, 7. That is, in the hinge 7, one hinge piece 7A is removably screwed to the inner upper edge of the vertical frame rod 2A on the left side in the figure of the outer frame body 2, and the other hinge piece 7A opposite to the one hinge piece 7A The hinge piece 7B is removably screwed to the upper edge of the outer surface of the vertical frame rod 5A on the left side of the inner frame body 5 in the figure, and the pin 8 that rotatably connects both the hinge pieces 7A and 7B is It is located above the frame rods 2A and 5A.

Furthermore, as shown in FIG. 2, the inward protrusion length L of the closure receiving edge 4 in the outer frame 2 described above is determined by the fitting gap S between the inner and outer frames 2 and 5, and
It is set to be longer by a predetermined length than the sum of the length P of the support edge 6 of the inner frame 5 extending inward. Furthermore, in this embodiment, the inner end of the closure receiving edge 4 is provided with a portion that comes into contact with the lower surface of the cover plate 24 placed on the support edge 6 of the inner frame 5 when the inner frame 5 is closed. A contacting closing portion 4a is provided to protrude upward by a predetermined length.

In addition, a locking rod 26 locks the free end side of the inner frame 5 and holds the inner frame 5 closed to the outer frame 2.
is rotatably attached to the center of the outer surface of the vertical frame rod 2B on the right side in the figure of the outer frame body 2 within a rotation range of approximately 90 degrees. At the upper end of this locking rod 26, a strip-shaped locking piece 27 that removably engages with the upper edge of the vertical frame rod 5B of the inner frame body 5 is formed horizontally, while at the lower end of the locking rod 27. The part is the contact edge 3 of the outer frame body 2
It penetrates through and is exposed, and a rotation groove 26A corresponding to a coin, screwdriver, etc. is recessed in the lower end surface.

In this embodiment configured as described above,
First, the locking rod 26 is rotated 90 degrees to release the locking piece 27 from the inner frame 5, and then the inner frame 5 is moved from the hinge 7 by pushing up the free end side of the inner frame 5. It is smoothly opened to the back side of the ceiling around the pin 8 of.

By operating the inner frame 5 in the opposite manner to the above, the inner frame 5 is closed.

In addition, since the inner frame body 5 is attached to the outer frame body 2 so as to be openable and closable with a hinge 7 that can be opened by rotating only upwardly without rotating downwardly, the locking rod 26
Even if the lock is opened by carelessly rotating the inner frame body 5, the inner frame body 5 will not be opened to the indoor side.

Further, in the above embodiment, in order to attach and detach the inner frame body 5 to and from the outer frame body 2, both hinge pieces 7 of the hinge 7
A and 7B were removably fixed to both frames 2 and 5 with screws, but the pin 8 of hinge 7 was
Both hinge pieces, 7, are removably fitted into A and 7B.
A and 7B may be fixed to both frames 2 and 5 by welding or rivets.

Next, another example of the hinge 7 will be explained with reference to FIGS. 4 to 17.

(b) As shown in Figures 4 and 5, a part of the upper edge of the frame rod of one of the frames 2 and 5 (outer frame in the figure) is bent to have a cylindrical cross section. However, the hinge 7 may be constructed by fitting the pin 8 between the cylindrical portion 9A and the cylindrical portion of the hinge piece 9B fixed to the upper edge of the outer surface of the other frame (inner frame in the figure). .

(b) As shown in Figures 6 and 7, both frames 2,
Parts of the upper edges of the frame rods 5 facing each other are bent to have a cylindrical cross section, and the mutual cylindrical portions 10A, 1
The hinge 7 may be constructed by inserting the pin 8 over 0B.

By forming the pins 8 of the hinges 7 described in (A) and (B) above to be detachable, the inner frame body 5 can be easily attached to and detached from the outer frame body 2.

(C) As shown in FIGS. 8 and 9, the upper edge of the hinge piece 11A fixed to one of the frames 2 and 5 (outer frame in the figure) has a concave arc shape in cross section. A fitting recess 12A is formed, and this fitting recess 12A is formed.
A fitting protrusion 12B having a convex arcuate cross section that is slidably and rotatably fitted to A is formed on the upper edge of the hinge piece 11B that is fixed to the other frame (the inner frame in the figure). may be configured. In this case, the inner frame body 5 can be easily attached to and detached from the outer frame body 2 by mutually sliding both hinge pieces 11A and 11B.

(d) As shown in Figures 10 and 11, one of the frames 2 and 5 (outer frame in the figure)
A fitting recess 13A having a concave arc cross section is integrally formed on the upper edge of the frame rod, and a fitting convex portion 13B having a convex arc cross section is slidably and rotatably fitted into the fitting recess 13A. Frame body (inner frame body in the figure)
The hinge 7 may be formed integrally with the upper edge of the frame rod. In this case, when forming the frame rods of both frame bodies 2 and 5 by extrusion molding of aluminum alloy, etc., the fitting recess 13A or the fitting convex portion 13B is provided for each frame rod.
can be molded simultaneously.

(E) As shown in Figures 12 and 13, one of the frames 2 and 5 (outer frame in the figure)
A support piece is formed by bending the upper edge of the hinge piece 14A fixed at a right angle, and a long hole 15
A connecting piece 15B, which has a C-shaped cross section and is inserted into, removed from, and rotatably engaged with the elongated hole 15A, is attached to a hinge piece that is fixed to the other frame (the inner frame in the figure). The hinge 7 may be formed by bending the upper edge of 14B.

(f) As shown in Figures 14 and 15, one of the frames 2 and 5 (outer frame in the figure)
A supporting piece is integrally bent on the upper edge of the frame rod of the other frame, and a connecting piece 16B that engages in a slotted hole 16A formed through a part of the supporting piece so as to be insertable/removable and rotatable is attached to the other frame. The hinge 7 may be formed by integrally bending the upper edge of the frame rod (inner frame body in the figure).

(G) As shown in FIGS. 16 and 17, the hinge pieces 17A are fixed along the inner surfaces of both adjacent corners of the outer frame 2 and the outer surfaces of both adjacent corners of the inner frame 5. The hinge 7 may be constructed by connecting the upper ends of the hinge piece 17B fixed along the pin 8 with the hinge piece 17B. Furthermore, both the hinge pieces 17A and 1
By interposing a spring 18 between the inner frame body 5 and the inner frame body 7B to bias the inner frame body 5 in the closing direction, the inner frame body 5 can be held closed relative to the outer frame body 2.

In addition, as shown in FIG. 18, the inner frame bodies 5' and 5'' divided into left and right halves may be attached to the outer frame body 2 so as to be openable and closable in both directions.

Furthermore, as shown in FIG. 19, the inner frame 5 may be foldably formed into a plurality of pieces and attached to the outer frame 2 so as to be openable and closable.

As mentioned above, by forming the inner frame so that it can be divided or folded, the inner frame can be opened well to the back side of the ceiling even when the height of the space above the ceiling is lower than the total length of the inner frame. be able to.
Therefore, it is suitable for increasing the size or length of the ceiling inspection port.

As described above, this invention consists of an outer frame that is framed in a rectangular shape using vertical and horizontal frame rods that have a horizontal piece and a vertical piece and are formed in a substantially inverted T-shape in cross section, and the outer frame. The inner frame is framed in a rectangular shape slightly smaller than the body, and is placed in the frame of the same outer frame so that it can be opened and closed with a predetermined fitting gap, and has a horizontal frame-like supporting edge for the lid plate inside the lower edge. The horizontal pieces of each vertical and horizontal frame rod in the outer frame body form a horizontal frame shape, and among the frame-shaped parts, the inner lower edge of the vertical piece of each frame rod is A portion forming a horizontal frame shape over all four circumferences is a closed receiving edge that receives the lower front surface of the supporting edge of the inner frame in a closed state to prevent the inner frame from falling; The length of the inward overhang of the blocking receiving edge of the frame is a predetermined length greater than the sum of the fitting gap between the inner and outer frame bodies and the inward overhang of the support edge of the inner frame. Furthermore, the upper edge of one side of the inner frame body is attached to the upper edge of one side of the outer frame body so that it can be fan-opened with a hinge, so that the inner frame body can be opened only to the back side of the ceiling. This is a constructed ceiling inspection opening.

Therefore, according to this invention, each of the vertical and horizontal frame rods that make up the outer frame in a rectangular shape is formed into an approximately inverted T-shape in cross section, compared to one with an L-shape in cross section. This has the effect of increasing the section modulus and increasing the rigidity, as well as preventing deformation of the outer frame and preventing opening/closing defects of the inner frame caused by deformation of the outer frame. . Furthermore, each of the vertical and horizontal frame rods of the outer frame body can be formed from the same shaped material having a substantially inverted T-shape in cross section, which is also effective in reducing costs.

Further, the horizontal pieces of each of the vertical and horizontal frame rods of the outer frame body form a horizontal picture frame shape, and among the portions forming the frame shape, the horizontal pieces extend over all four circumferences inside the lower edge of the vertical pieces of each frame rod. The shaped portion is a closed receiving edge that receives the entire lower surface of the supporting edge of the inner frame in a closed state to prevent the inner frame from falling. It is possible to close all the fitting gaps around the four circumferences between the frame body and the inner frame body, and it is also possible to prevent the problem of dirt, dust, etc. remaining in the gap falling during the opening/closing operation of the inner frame body.

Furthermore, the inward protrusion length of the blockage receiving edge in the outer frame is the sum of the fitting gap between the inner and outer frame bodies and the inward protrusion length of the support edge in the inner frame. Since it is set to be a predetermined length longer than the length, there is also the problem that the inner end of the support edge of the inner frame body is exposed from the inner end of the blockage receiving edge of the outer frame body, spoiling the appearance. It can be proactively prevented and has an excellent design.

Moreover, according to this invention, the upper edge of one side of the inner frame body is attached to the upper edge of one side of the outer frame body using a hinge so that the inner frame body can be opened only to the back side of the ceiling. Since the inner frame body is not opened to the inside of the room compared to the outer frame body, but is opened only to the back of the ceiling, unlike in the past, the indoor space is not obstructed by the open inner frame body. Not only is this possible, but also accidents caused by the inner frame falling can be prevented. Furthermore, since the inner frame body is opened and closed with respect to the outer frame body using the hinge as a fulcrum, the two frames do not collide with each other during the opening and closing operation of the inner frame body, and there is no opening/closing vibration. This has the advantage of being able to open and close the frame smoothly, and also to prevent damage caused by mutual collision between the two frames.

Furthermore, even when the inner frame body is suddenly closed with respect to the outer frame body, the support edge of the inner frame body can be closed due to the blockage receiving edge of the outer frame body, which has a highly rigid cross section and has an approximately inverted T shape. Since the entire lower surface can receive the load in a distributed manner, durability is improved by preventing deformation of the outer frame and inner frame and damage to the hinge caused by the load caused by the sudden closing movement of the inner frame. At the same time,
There are effects such as the ability to stably receive the inner frame in the closed state without providing a dedicated stopper holding means for holding the inner frame in the closed state. Even if the hinges should come off from the inner and outer frames, the inner frame can be reliably prevented from falling.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view showing the entire ceiling inspection opening, Fig. 2 is a sectional view taken along the line - - of Fig. 1, and Fig. 3 shows a state in which the inner frame is fanned out. 4 to 17 respectively show other examples of the hinge, and FIGS. 4 and 5 are perspective views and sectional views showing another example (a), and FIGS. 6 and 17 show different examples of the hinge. Figure 7 is a perspective view and a sectional view showing another example (b), and Figure 8
9 and 9 are a perspective view and a sectional view showing another example (c), FIGS. 10 and 11 are a perspective view and a sectional view showing another example (d), and FIGS. 12 and 13 are another example.
14 and 15 are perspective views and sectional views showing another example (F);
6 and 17 are perspective views and sectional views showing another example (G), FIGS. 18 and 19 show another example of the inner frame body, and FIG. 18 shows a structure in which the inner frame body is divided into two parts. FIG. 19 is a front sectional view showing a structure in which the frame body can be opened and closed in both directions, and FIG. 19 is a front sectional view showing a structure in which the inner frame body is foldable. 1...Ceiling inspection port, 2...Outer frame body, 4...Block receiving edge, 5...Inner frame body, 6...Support edge, 7...Hinge, S...Fitting gap.

Claims (1)

[Scope of utility model registration request] An outer frame body framed in a rectangular shape with vertical and horizontal frame rods having a horizontal piece and a vertical piece and formed into an approximately inverted T-shape in cross section, and an outer frame body framed in a rectangular shape slightly smaller than the outer frame body. The inner frame body is arranged so as to be openable and closable with a predetermined fitting gap within the frame of the outer frame body, and has a support edge for a cover plate in the shape of a horizontal frame on the inner side of the lower edge. The horizontal pieces of each vertical and horizontal frame rod of the outer frame body form a horizontal picture frame shape, and among the portions forming the frame shape, all four circumferences inside the lower edge of the vertical pieces of each frame rod form a horizontal picture frame shape. a closed receiving edge that receives the lower front surface of the supporting edge of the inner frame body in a closed state to prevent the inner frame from falling; The overhang length is set to be longer by a predetermined length than the sum of the fitting gap between the inner and outer frame bodies and the inward overhang length of the support edge of the inner frame body, and A ceiling characterized in that the upper edge of one side of the inner frame body is attached to the upper edge of one side of the outer frame body with a hinge so that the inner frame body can be opened only to the back side of the ceiling. inspection door.