JPS5931623B2 - Inspection port frame - 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 that abut each other in a rectangular shape and are pivoted to each other so that they can be opened and closed, and is installed 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. In order to do this, it is necessary to use fasteners such as screws, which is time-consuming, and if the connection by the fasteners is incomplete, there are drawbacks such as the connecting portion becoming loose or deformed.

In view of these circumstances, the present invention provides an inspection port frame that connects the abutting ends of each frame member with corner fittings without using fasteners such as screws, and does not cause rattling or deformation. The purpose is to

Embodiments of the present invention will be described below 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 the inspection opening shown in FIG. attached.

As shown in FIG. 2, each corner of the outer frame 1 is formed by connecting the ends of two outer frame members 2 which are abutted at right angles and separated from each other with an abbreviated corner fitting 8. It is formed.

As shown in FIGS. 2 and 4, the corner fitting 8 includes a corner part 8a that is formed by bending a single plate and is bent at an acute angle, and a corner part 8a that extends from the corner part 8a. It consists of two wing pieces 8b, 8b, and each wing piece 8b has a part of the wing piece 8b bulging outward in a step shape at a position corresponding to a locking hole 13 of the outer frame 2, which will be described later. A protrusion 10 is formed in this way.

On the other hand, each outer frame member 2 has engaging parts 11 formed by bending the starting end into a hook shape at the upper and lower ends of the bar member side wall 2a, as shown in FIG. The corner metal fitting 8 is accommodated in a vertical gap 12 formed by the side wall 2a of 11.

Further, a locking hole 13 is formed in the side wall 2a of the outer frame member 2 near the abutting portion, into which the protruding portion 10 of each wing piece 8b locks.

Here, the width of the gap 12 is made larger than the plate thickness so that the corner fitting 8 can be inserted therein, and the size of the locking hole 13 formed in the side wall 2a of the gap 12 is as follows:
The protrusions 10 of the wing pieces 8b are defined to fit together, and each wing piece 8b of the corner fitting 8 is bent so as to come into pressure contact with the inner and outer inner wall surfaces of the gap 12.

Therefore, when the wing piece 8b of the corner fitting 8 is inserted into the gap 12 from the child end of the outer frame member 2, the corner fitting 8 is pressed slightly inward, and its elastic force causes the corner part 8 to
The inner part of a is pressed against the inner inner wall surface of the gap part 12 (the inner surface of the engaging part 11), while the outer surface of each wing piece 8b is pressed against the outer inner wall surface of the gap part 12 (the inner surface of the side wall 2a). Ru.

At this time, when the protruding part 10, which is a part of the wing, passes through the gap 12 in a bent state and reaches the position of the locking hole 13, it is elastically locked in the locking hole 13. The corner fitting 8 is fixed so as not to fall out from the gap 12.

As a result, the abutting ends of two adjacent outer frame members 2 are connected so as not to shift or deform.

5 and 6 show a second embodiment of the corner fitting 8 according to the present invention, in which each wing piece 8b is bent in the same manner as the embodiment shown in FIGS. 2 to 4.
An embodiment is shown in which a part of the projection 10 is bulged into a hemispherical shape to form a protrusion 10.

FIGS. 7 to 9 show a bent corner fitting 8 similar to the embodiments shown in FIGS. 2 to 6, with a "■"-shaped notch 15 provided in each wing piece 8b, and An embodiment is shown in which the cut pieces 16, 16 are bent outward to form the protrusion 10 and are locked in the locking hole 13.

The embodiments of the outer frame body 1 according to the present invention have been described above, but the inner frame body 3 is also constructed in the same manner as the outer frame body 1, and the two adjacent inner frame members 4 are They are coupled by locking the projections 10 provided on each wing piece 8b of the corner fitting 8 into the locking hole formed in the corner fitting 8.

Further, in the above embodiment, the gap 12 is formed by providing the retaining portion 11 at the upper and lower ends of the side wall of each frame member 2 or 4, but the engaging portion 11 formed at the upper end of the side wall
The side wall of the frame member may have a double structure by connecting the lower end of the frame member with the upper end of the engaging portion 11 formed at the lower end of the side wall, and the gap may be formed by the side walls of the double structure.

As described above, according to the present invention, a corner fitting is fitted into a gap formed on the outside or inside of two adjacent frame members, and a part of the corner is attached to each of the outside inner wall surfaces of the gap. The wing pieces are elastically pressed against the inner wall surface of the above-mentioned gap, and the abutting ends of each frame member are connected and fixed, so each frame member can be attached using only corner fittings without using fasteners such as pills. can be connected to prevent rattling or deformation of each connected part.

Furthermore, simply by fitting the wing pieces of the corner metal fittings into the gaps between the frame members, the projections formed on each wing piece elastically lock into the locking holes formed on each frame member, so that the corner metal fittings This eliminates the need for a fastening process, prevents the corner metal fittings from slipping out of the gaps between the frame members, and allows the inspection port frame to be firmly framed as a whole.

In addition, at this time, the protrusion formed on each wing is locked in the locking hole by the restoring force of the deflection of the wing itself, so there is no need to form a special retaining member, simplifying the structure. It can be done.

[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 vertical sectional view of a joint using corner fittings. FIG. 4 is a perspective view of a corner fitting that connects and fixes the corner of the outer frame. 5 and 6 are horizontal and vertical cross-sectional views of the corners of the outer frame joined by corner fittings having hemispherical protrusions. FIGS. 7 and 8 are horizontal and vertical sectional views of the corners of the outer frame joined by a corner fitting in which a protrusion is formed by cutting a part of each wing of the corner fitting and bending both sides of the cut. . FIG. 9 is a perspective view of the corner fitting shown in FIGS. 7 and 8. 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,
7... Inner frame support device, 8... Corner metal fittings, 8a.
... corner part, 8b ... wing piece, 10 ... protrusion,
DESCRIPTION OF SYMBOLS 11... Engagement part, 12... Gap part, 13... Locking hole.

Claims (1)

[Claims] 1 Four frame members having engaging portions whose starting ends are bent into hook shapes protrude from the upper and lower ends of the side walls and having gaps formed along the inner or outer wall surfaces of the side walls. A part of a corner that is formed by bending a plate material and has a part that is pressed against the outer inner wall surface of the gap, and a corner part that extends from this corner part and is pressed against the inner inner wall surface of the gap. In the inspection port frame body, the abutting corner portion of the frame member is held at a right angle by fitting a corner fitting consisting of two wing pieces bent so as to have a portion into the gap portion into the gap portion, A locking hole is bored in the side wall near the abutting portion of the frame member, and the wing piece of the corner metal fitting is fitted into the gap portion at a position corresponding to the locking hole, and is bent. An inspection port frame body comprising a protrusion that is elastically locked in the locking hole.