JPS5849320Y2 - Ceiling access door - Google Patents

Description

[Detailed description of the invention] The present invention relates to a ceiling inspection port installed to inspect and repair various equipment such as wiring, piping, and air ducts installed inside the ceiling. is assembled with corner metal fittings provided on the inner side of the inner frame, and a rotating shaft for supporting the inner frame on the outer frame and opening/closing is provided integrally with the corner metal fitting of the inner frame, and protrudes from the outer side of the inner frame. The force is pivoted on a bearing formed on the inner side of the frame, which simplifies the assembly process of the inner frame, reduces the number of parts, reduces costs, and reduces the impact caused by violently rotating and opening the inner frame. This provides an inspection opening that can prevent damage to the rotating shaft and distortion of the inner frame.

The structure of the present invention will be explained in detail with reference to the attached drawing σ) Implementation 1 Knee 11. 1 is a rectangular outer frame that is fixed to the base of the ceiling f1 with appropriate mounting brackets; Of the four frame pieces, a substantially U-shaped bearing 2 with an opening at the top is provided on one side of the inner surface of the frame piece with opposing two side forces.

As shown in FIGS. 3 and 4, the inner frame 3 that is fitted and pivotally supported on the outer frame 1 has locking locks that are opposed to each other on the lower and upper sides of the substantially vertical main edge 4. Nails 5, 5 are provided, and horizontal openings 7 are provided at the longitudinal ends of two opposing pieces among these four fragments, so that the corner fitting 9 can be secured to a pair of upper and lower locking claws 5. , 5 are engaged with each other to form a square assembly.

As shown in FIG.
0 is provided protrudingly, and this wing piece 9 is press-fitted between the locking claws 5 and 5 of the fragment having a horizontal shaft hole 7 at the end, and the other wing piece 9
In the same way, press fit between the locking claws 5, 5 of the other frame pieces and attach the inner frame 3.
At the same time, the rotating shaft 10 is formed.

A rotary shaft 10 integrally protruding from the corner fitting 8 receives liquid from the periphery of the hole 13 of the corner fitting 8 in a concave fixing groove 12 provided around its root side, and mooring the inner surface thereof. The inner frame 3 is fixed as shown in the second figure.
When assembled into a T-ner, it is supported in stages by the hole 13 in the T-ner metal and the horizontal shaft hole 7 in the inner frame 3, and is firmly formed without wobbling.

The inner frame 3 configured as described above is rotatably and detachably supported by fitting the rotary shaft 10 provided in the inner frame 3 through the opening of the bearing 2 of the outer frame 1.

The present invention has the above-mentioned configuration, and the two opposing corner fittings that are press-fitted between the locking claws formed inside the inner frame are provided with the corresponding inner frame fragments in the longitudinal direction. A rotary shaft is integrally formed, which is inserted into a horizontal shaft hole formed between the locking claws at the end and projects from the inner side of the inner frame to the outer side.
This rotating shaft is removably pivoted to a bearing with an upper opening formed on the inner surface of the corresponding outer frame, and the rotating shaft provided on the inner frame is integrally fixed to the corner fitting. It is also supported by the inner frame and has a two-point support structure, so it is strongly formed and can withstand the weight of the inner frame and sudden rotation and opening of the inner frame, supporting the inner frame in a stable state for a long period of time and preventing rotation. It can be done smoothly.

Furthermore, even when the button is assembled in the process of assembling the inner frame, it is possible to simplify the work of separately attaching the rotary shaft to the inner frame, and to reduce the number of parts such as screws, thereby reducing costs.

In addition, the inner frame has locking claws on its inner side and is assembled with corner metal fittings, so the lower ends of the inner and outer frames can be brought close to each other while minimizing the gap between them and the corresponding outer frame. This can prevent contamination, etc.

[Brief explanation of drawings]

Fig. 1 is a plan view of the inspection port according to the present invention, Fig. 2 is a sectional view taken along the line A perspective view showing main parts. 1... Outer frame, 3... Inner frame, 5... Locking claw, 7...
Horizontal shaft hole, 8... Corner fitting, 9... Wing piece, 1
0...Rotation axis.

Claims (1)

[Scope of utility model registration request] It consists of four frame pieces each having locking claws on the inside facing the upper and lower pressure plates, each of which is assembled with a corner metal fitting in the shape of a cross-sectional abbreviation that is press-fitted between the locking claws at each corner. The two opposing corner metal fittings that are press-fitted between the locking claws formed on the inside of the inner frame are formed between the locking claws at the longitudinal ends of the corresponding inner frame pieces. A rotary shaft is formed by inserting the rotating shaft through the opening to protrude to the outer side of the inner frame, and is removably pivoted to a bearing with an upward opening provided inside the outer frame, which is also assembled in a rectangular shape. A ceiling inspection opening.