JPS6227222B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inspection port frame that is attached to a ceiling, wall, etc. and forms an inspection port for later inspection of electrical wiring and various types of piping arranged on the back side thereof.

This type of inspection port consists of two frame bodies, an inner and outer frame, each of which has four frame members abutting each other in a rectangular shape and are pivoted to each other so that they can be opened and closed, and can be arranged by attaching the outer frame to the ceiling or wall. The corners of each frame are connected by L-shaped corner fittings, as connecting them by welding would easily cause deformation and distortion due to heat. It is necessary to use fasteners such as screws to connect each frame member, which is time-consuming and may cause the connected parts to wobble or deform if the fasteners are not fully connected. There are drawbacks.

In view of these circumstances, the present invention has been developed to allow the abutting ends of each frame member to be connected using corner fittings without using fasteners such as screws, and to enable inspection without rattling or deformation. The purpose is to provide a mouth frame body.

Hereinafter, preferred embodiments of the present invention will be explained in detail with reference to the accompanying drawings.

FIG. 1 shows an inspection port according to the present invention consisting of two frames, an inner and outer frame. The outer frame 1 of this inspection port is constructed in a rectangular shape with four outer frame members 2, and inside thereof an inner frame 3, which is framed with four inner frame members 4, is pivoted with hinge pins 5 so that it can be opened and closed. It is worn. In addition, in the inspection port shown in FIG. 1, an inner frame support device 7 equipped with a pair of lock bars 6, 6 extending left and right along the inner frame member 4 on the open front end side of the inner frame body 3 is attached to the inner frame body 3. attached.

As shown in FIG.
It is formed by connecting the ends of each with a substantially L-shaped corner fitting 8. This corner fitting 8 consists of a corner part 8a bent at right angles and two wing pieces 8b, 8b extending from this corner part 8a, and the upper and lower ends near the corner part 8a and the wing tip of each wing piece 8b. A protrusion 9 is formed on the edge by bulging a portion of the edge with a press or the like, and a notch 12 is formed in the center in the longitudinal direction.

On the other hand, each outer frame member 2 has an inward hook-shaped protruding edge 10 at the upper and lower ends of the member side wall 2a, as shown in FIG. The corner fitting 8 is accommodated within the portion 11.

Therefore, the width ₁₁ of the gap 11 is larger than the thickness of the corner fitting 8 so that the corner fitting 8 can be fitted therein, and the width 11 of the gap 11 is larger than the thickness of each wing piece 8b of the corner fitting 8.
As shown in FIG.
When the wing pieces 8b are pushed into the gap 11 from one end of the outer frame member 2, each protrusion 9 is pressed against the inner wall surface of the gap 11 (the inner surface of the hook-shaped protrusion 10), while each The wing piece 8b is pressed against the outer inner wall surface (inner surface of the side wall 2a) of the gap 11 and temporarily fixed. In this state, when the side wall 2a of the outer frame member 2 is pressed and projected from the direction opposite to the projection 9 of the wing piece 8b using a press or the like and inserted into the notch 12 of the corner fitting 8, the projection of the side wall 2a presses the notch 12 portion of the wing piece 8b, and as a result, a slight elastic deflection occurs in the wing piece 8b using the protrusion 9 as a fulcrum, and in this state, the outer frame members 2 are connected to each other. That is, the press-fitting portion 13 of the outer frame member 2 and the peripheral edge of the notch 12 of the corner fitting 8 are connected in a pressed state due to the restoring force of the elastic deflection of the wing piece 8b of the corner fitting 8. By connecting each wing piece 8b of the corner fitting 8 to each outer frame member 2 in this way, a rectangular outer frame 1 is formed, and the abutting ends of each outer frame member 2 are formed at the corners of the outer frame 1. It is held at right angles without shifting or opening.

The above embodiments all relate to the outer frame 1, but these basic configurations are also the same for the inner frame 3, and the structure (particularly the corners) of the inner frame 3 is different from the outer frame in the above embodiments. The frame member 2 is replaced with an inner frame member 3. One embodiment is shown in FIG. In this embodiment, an inner frame member 4 having an outward hook-shaped projecting edge 10 on the upper and lower edges of a side wall 4a is connected by a corner fitting 8 having an outward projecting part 9, and further, as shown in FIG. As in the embodiment, a portion 13 of the side wall 4a is press-fitted into the notch 12 provided in the wing piece 8b, thereby making the connection stronger. In this embodiment, a gap 1 is provided on the outside of the inner frame member 4.
1 is formed, but it is also possible to form this inside. Furthermore, in the embodiment shown in FIG. 2, the gap 11 is formed inside the outer frame member 2;
Of course, it is also possible to form this on the outside.

Moreover, it is also possible to connect the hook-shaped protruding edges 9, 9 that are opposed to each other.

As explained above, the present invention has a corner fitting 8.
A protrusion 9 is bulged out at the upper and lower edges of the wing piece 8b, and a notch 12 is formed at the longitudinal center of the wing piece 8b.
The side wall 2a of the frame member is formed in the notch 12.
Since the wing pieces 8b of the corner metal fittings 8 are pressed from a direction opposite to the protruding portion 9 of the wing pieces to be retracted, a slight elastic deflection occurs in the wing pieces 8b of the corner metal fitting 8 due to the pressing force, and the above-mentioned Even if spring back occurs after the frame member is pressed and retracted, the notch 12 of the wing piece 8b
The peripheral edge portion and the press-fitting portion 13 of the frame member are connected in a press-contact state, and there is no play. Furthermore, by pressing the side wall of the frame member, pressure is applied to the corner fitting, and the protrusion formed on the opposite side of the pressed side presses the side wall on the opposite side of the gap, so the corner fitting itself is strongly clamped. It stays put and there is no rattling at all.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an inspection port constructed with an inspection port frame according to the present invention. FIG. 2 is a horizontal sectional view of one corner of the inspection port outer frame according to the present invention. FIG. 3 is a longitudinal sectional view of the outer frame. FIG. 4 is a horizontal sectional view of one corner of the inspection port inner frame according to the present invention. DESCRIPTION OF SYMBOLS 1... Inspection port outer frame body, 2... Outer frame member, 3... Inspection port inner frame body, 4... Inner frame member, 5... Hinge pin, 8... Corner metal fitting, 8a... Corner part, 8b... Wing piece, 9
...Protrusion, 10...Hook-like protrusion, 11...Gap, 12
...notch, 13...press-fitting part.

Claims (1)

[Scope of Claims] 1. Four frame members are abutted in a rectangular shape, and each abutment corner is formed by bending a plate material, and includes a corner part and two wing pieces extending from this corner part. In the inspection port frame body which is connected at right angles by corner fittings, hook-shaped projecting edges are provided on the outside or inside of the upper and lower edges of the frame member, so that the side wall of the frame member and the hook are connected to each other at right angles. A gap is formed between the corner fitting and the upper and lower edges near the wing tips of the corner fittings and the inner wall surface of the hook-shaped edge of the frame member. At the same time as expanding the protrusion to be pressed, a notch is formed in the longitudinal center of the wing of the corner fitting, and a part of the side wall of the frame member is pressed from a direction opposite to the protrusion of the wing. An inspection port frame body that protrudes and is recessed into a notch of the wing piece.