JPS5834181Y2 - Inspection port frame - Google Patents

Description

[Detailed description of the invention] This invention relates to an inspection port that is attached to a ceiling or wall, etc., and is used to later inspect and repair electrical wiring and various types of piping installed on the back side.

The frame of the inspection port is composed of rectangular inner and outer frames that are pivotally connected to each other so as to be openable and closable, and is installed by attaching the outer frame to the ceiling or wall.

Therefore, the frame of the inspection port must be strong enough to withstand various loads applied from the outside, and have a structure that is resistant to deformation so that the inner frame can be opened and closed smoothly with respect to the outer frame. is required.

In particular, when a load such as torsion is applied to the frame, the moment is maximum at the abutting corner of the frame member, so
The corner fittings that connect these abutting corners are required to have rigidity.

On the other hand, in order to improve rigidity, it is necessary to increase the thickness of the corner metal fittings, but in this case, the workability of the material decreases and the material cost is high, resulting in an increase in costs. There was a problem with that.

This idea was made in view of these points, and even if the thickness of the corner metal fittings is made to a thickness that does not reduce workability, it has sufficient rigidity against distortion, etc. To provide a frame of an inspection port which has a strong structure and is not easily deformed, and which is easy to assemble.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

1 to 4 show an inspection port frame according to a first embodiment of this invention, and as shown in FIG. 1, four outer frame members 3 are connected by corner fittings 5 to form a rectangular structure. Outer frame 1
An inner frame body 2, which is framed by four inner frame members 4, is pivotally attached to the outer frame body 1 by hinge pins 9 so as to be openable and closable.

In this first embodiment, as shown in FIG. 2, the corner fittings 5 connecting the abutting corners of the outer frame member 3 are formed by bending a plate material into a cross-sectional shape. 6 is formed, and furthermore, a bulging portion 7 is formed that extends from the corner of the corner fitting 5 along the longitudinal direction of both wing portions 6 and projects inwardly of each wing portion 6. There is a fitting protrusion 1 at the tip of the
0 protrudingly provided, and the vertical cross-sectional shape of each wing portion 6 is approximately circular like the outer frame member 3 so that the inner surface thereof can be brought into close contact with the outer surface of the outer frame member 3. It is formed in an arc shape.

Further, as shown in FIG. 3, the outer frame member 3 in the first embodiment is curved in a substantially arcuate longitudinal section in order to increase the strength against bending. Notch 1
1 is provided, and when the outer frame members 3 are abutted through this notch 11, a receiving portion 8 is formed at the abutting corner, and a bulging portion 7 formed inside the corner of the corner fitting 5 is formed as a receiving portion. The outer frame member 3 can be tightly fitted into the outer frame member 3.
The fitting protrusion 1 of the corner fitting 5 is adjacent to the notch 11.
A slit 12 into which 0 is inserted is bored.

Therefore, according to the inspection port frame of the first embodiment, each outer frame member 3 has two adjacent outer frame members 3 whose ends form a right angle, as shown in FIG. collided like this,
A corner fitting 5 is in close contact with the abutting corner of this outer frame member 3 from the outside, and a bulging portion 7 formed inside the corner of this corner fitting 5 is formed between two adjacent outer frames. The fitting protrusions 10 are fitted into the receiving portions 8 formed by the notches 11 formed at the ends of the member 3, and the fitting protrusions 10 formed at the tips of both wing portions 6 of the corner fittings 5 are inserted into each outer It is inserted into the slit 12 of the frame member 3 and bent, and in this way the corner fittings 5 connect the abutting corners of the outer frame member 3.

According to this first embodiment, the fitting protrusions 10 protruding from the corner fitting 5 include one provided along the longitudinal direction of the wing portion 6 of the corner fitting 5 and one provided along the width direction of the wing portion 6. These fitting protrusions 10 are used to firmly connect the abutting corners of the outer frame member 3. has a concave groove 13 formed along its longitudinal direction, and when the fitting protrusion 10 is inserted into the slit 12 of the outer frame member 3 and bent, the bent end of the fitting protrusion 10 is located in the groove 13 so that it does not get in the way when the inner frame 2 is opened and closed within the frame 1.

Further, a skirt portion 14 is provided at the lower end edge of the corner fitting 5 to abut against the outer surface of the outer frame member 3 to determine the position between the corner fitting 5 and the outer frame member 3.

Next, FIG. 5 shows a modification of the receiving part 8 formed in the outer frame member 3 as a second embodiment, and the receiving part 8 of this second embodiment is similar to that of the first embodiment. Unlike the above case, a recess 15 is formed at the end of the outer frame member 3, and when each outer frame member 3 is abutted by this recess 15, the bulge 7 of the corner fitting 5 is fitted into the abutting corner. A receiving portion 8 is formed.

Moreover, FIG. 6 shows a third embodiment of this invention.
A receiving part 8 for the bulging part 7 of the corner fitting 5 is formed at the abutting corner of the vertically formed outer frame member 3, and a receiving part 8 for the bulging part 7 of the corner fitting 5 is formed at the outer end of each outer frame member 3. A fitting groove 16 for the corner fitting 5 is formed at the end edge, and by fitting the corner fitting 5 into the fitting groove 16 and fitting the bulging portion 7 into the receiving portion 8, each outer frame member 3 It is formed so that the abutting corners of the two can be connected.

Furthermore, FIG. 7 shows a fourth embodiment of this invention.
The corner metal fitting 5 located in the recess 17 formed on the outside of the inner frame member 4 has a bulge 7 formed on the inside of the corner and a receiving portion 8 provided at the abutting corner of the inner frame member 4. A protrusion 18 that is fitted into the inner frame member 5 and protrudes from the inner side of both wing parts 6 of the corner metal fitting 5 passes through a mounting hole 19 formed in the inner frame member 4, and the head of the protrusion 18 is caulked inside the inner frame member 4. Thereby, the corner fittings 5 connect the abutting corners of the inner frame member 4.

Since this invention has the above configuration, the bulging part 7 formed at the negative part of the corner fitting 5 fits into the receiving part 8 formed at the abutting corner part of the frame member 3.4, and each When the abutting corners of the frame members 3, 4 are connected with this corner fitting 5, accurate positioning between the two adjacent frame members 3, 4 and the corner fitting 5 is achieved, and inspection of one frame body is performed. This makes assembly easier and improves work efficiency.

Furthermore, when the bulge 7 formed on the corner fitting 5 is fitted into the receiving part 8, the outer periphery of the bulging part 7, especially the upper and lower protruding parts, and the upper and lower edges of the receiving part 8 are made to come into close contact with each other. Therefore, frame member 3
When framed, these corners are precisely aligned and
There is no difference in level between the upper and lower ends of the frame member 3, and since the fins extend along the longitudinal direction of both wing portions 6 and are connected to the frame member, it is possible to resist the external force exerted on the frame member by extending in the longitudinal direction. Since the entire surface of the upper and lower overhanging portions of the bulge can receive the force, there is no play in the corners or gaps, and there is no risk of sagging or distortion. It can be prevented.

Moreover, the bulges 7 formed on the corner fittings 5 are
Since the corner fitting 5 extends along the longitudinal direction, rigidity can be ensured even if the corner fitting 5 is made of a plate material having a thickness that does not reduce workability.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an inspection port frame according to the first embodiment of this invention, Fig. 2 is a perspective view of a corner fitting used in the inspection port frame shown in Fig. 1, and Fig. 3 is a plan view of the inspection port frame according to the first embodiment of the invention. FIG. 4 is a perspective view showing the abutting corners of the outer frame members in the inspection port frame shown in FIG. 3, and FIG. 4 is a perspective view showing the abutting corners of the outer frame members in FIG. 5 is a perspective view showing a second embodiment of a modification of the receiving portion formed at the abutting corner of the outer frame member, and FIG. 6 is a corner of the outer frame body according to the third embodiment. FIG. 7 is a perspective view showing a corner of the inner frame according to the fourth embodiment. 1...Outer frame body, 2...Inner frame body, 3...
...Outer frame member, 4...Inner frame member, 5...
... Corner metal fittings, 6 ... Wings, 7 ...
...Bulging part, 8...Receiving part.

Claims (1)

[Scope of utility model registration request] An inspection port frame in which four frame members abut each other in a rectangular shape, and the abutting corner parts of the frame members are connected by a corner metal fitting that forms two wing parts by bending the plate material in a cross-sectional shape. In the body, a bulge is formed on the corner fitting, extending from the corner of the corner fitting along the longitudinal direction of both wing parts, and protruding inwardly or outwardly of each wing part, and the abutting part of the frame member is formed. An inspection port frame body characterized in that a receiving part into which a bulging part of the corner fitting fits is formed at a corner part.