JPH0237945Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is installed on the ceiling surface and is connected to the wiring inside the ceiling. This invention relates to improvements to ceiling inspection ports for inspecting piping, etc., and particularly to corner fittings that frame the outer and inner frames of ceiling inspection ports.

The outer frame of the ceiling inspection opening is equipped with parts such as a bearing that pivots the inner frame and a lock bar holder that locks the inner frame. In order to ensure that the effective opening area of the outer frame is as large as possible, and to withstand the heavy impact and weight of the inner frame when opening and closing the inner frame, these parts are designed with reinforced corner fittings that frame the outer frame. It is located near the department. However, these parts are provided with protrusions for fixing the parts and regulating the mounting positions, and it is necessary to provide through holes in the corner fittings to allow these protrusions to pass through. However, the through holes are provided to match the protrusions of various parts, and the protruding positions of these protrusions differ depending on the type of parts, so many types of corner fittings are manufactured and stocked, and the parts to be mounted are different. It was necessary to select corner fittings and frame them accordingly.

This idea was made in view of the above circumstances.
To provide a ceiling inspection opening that can be framed with one type of corner metal fittings and to which various parts can be attached without having to manufacture a plurality of corner metal fittings according to various parts.

An embodiment of the present invention will be described below with reference to the drawings. Figure 1 is an overall perspective view of the ceiling inspection opening. 1 is an aluminum alloy outer frame, and corner fittings 2 are used to frame four frame pieces into a roughly rectangular shape. The structure will be described later, but bearing 3
The outer frame 1 is fitted into an opening in the ceiling and fixed to the ceiling by appropriate fixing means.

An inner frame 4 is fitted into the outer frame 1, and the inner frame 4 is made of aluminum alloy like the outer frame 1, and has four frame pieces arranged in a substantially rectangular shape, and faces the bearing 3 of the outer frame 1. A rotating shaft 5 is provided on the two frame pieces.
In addition, this inner frame 4 has a cover plate 6 made of substantially the same material as the ceiling plate attached to the four frame pieces, and when the inner frame 4 rotates about a rotation axis, the inner frame 4 can be opened and closed. This allows people to enter and exit the ceiling inspection opening. A locking device 7 closes the inner frame 4 by engaging and disengaging the tip of a lock bar 8 to a lock bar receiver 9 provided on the outer frame 1.

Further, to explain these structures in detail, each frame piece of the outer frame 1 has a main edge 1a extending in the longitudinal direction, and locking grooves 1b, 1c facing each other are provided at the upper and lower ends of the main edge 1a. These four frame pieces are butted against each other, and the corner fittings 2 are fitted into the locking grooves 1b and 1c to form a frame.
Furthermore, a through hole (not shown) for attaching a bearing board 12 and a lock bar receiving board 14, which will be described later, is pre-drilled in the main edge of this frame piece. The position of the opening corresponds to the location of the protrusion provided on the back surface of the bearing board and the lock bar receiving board.

The corner fittings 2 that frame this outer frame 1 are the seventh
As shown in the figure, two wing pieces 10 are formed by bending a flat plate at approximately right angles, and near the tip side of the wing pieces 10, there is a long hole 11 through which a protrusion such as a bearing or a lock bar bearing, which will be described later, is passed. It is formed to extend in the vertical direction and to be plane symmetrical with respect to the folding line. These elongated holes are formed in the main edge 1a of the outer frame 1 through two through holes (not shown, see FIG. 4) for attaching the bearing substrate 12, which are formed in advance on the main edge 1a of the outer frame 1, and in the same manner as in the main edge 1a of the outer frame The holes are vertically connected to communicate with all of the through holes (not shown, see FIG. 6) for attaching the lock bar receiving board 14 that are previously formed in the lock bar receiving board 14.

Opposing main edges 1 of the two frame pieces of the outer frame 1
A bearing base plate 12 on which the bearing 3 projects toward the inner frame is attached to one end in the longitudinal direction of a.

This bearing substrate 12 is formed by injection molding of a synthetic resin such as nylon, or integrally molded aluminum alloy or the like by a die-casting method, and has a substantially flat plate shape. Two protrusions 12a, 12 toward the main edge 1a of
b are formed on the top and bottom, and the upper protrusion 12a is formed hollow and has a slot at its tip.

This bearing board 12 is attached to the main edge 1a of the frame piece of the outer frame 1.
To install the bearing board, first, fit the two protrusions 12a, 12b of the bearing board 12 into the two through holes formed in the main edge 1a of the outer frame 1 in advance, and then insert the tips of the protrusions 12a, 12b. The pins 13 are located above and below the elongated hole 11 formed in the corner fitting 2, and are inserted through the protrusion 12a located above.
The bearing base plate 12 is tightly fixed to the main edge 1a of the outer frame 1 by press-fitting the base plate 1 and expanding the slotted portion at the tip of the protrusion outward.

A lock bar receiving base plate 14 having a lock bar receiving plate 9 projecting toward the inner frame is attached near the other end of the two frame pieces on which the bearing 3 is provided.

This lock bar receiving board 14 is formed by injection molding of a synthetic resin such as nylon, or by integrally molding aluminum alloy or the like by a dacasting method, and forms a substantially flat plate. A protrusion 14a is formed approximately at the center toward the main edge 1a of the holder 1, and the protrusion 14a is hollow and has a slot at its tip.

In order to attach this lock bar receiving board 14 to the main edge 1a of the frame piece of the outer frame 1, first, the protrusion 14a of the lock bar receiving board 14 is attached to the main edge 1a of the outer frame 1.
The protrusion 1 is inserted into the through hole formed in the
A long hole 11 with the tip of 4a formed in the corner fitting 2
The main part of the outer frame 1 is inserted through the protrusion 14a at approximately the center in the longitudinal direction, press-fits the pin 15 into the hollow of the protrusion 14a, and expands the slotted portion at the tip of the protrusion outward. Lock bar receiving board 14 on edge 1a
This means that the parts are closely attached to each other.

The present invention has the above configuration,
Two wing pieces of the corner metal fitting that frames the outer frame are formed with vertically elongated holes symmetrical with respect to the folded line. The mounting protrusion protruding from the back surface of the component is passed through the through hole formed in the outer frame and positioned in the elongated hole, and the component is locked and fixed to the outer frame with a pin. When fixing to the outer frame, the tip of the mounting protrusion is guided into the long hole without being obstructed by the corner metal fittings, in other words, without coming into contact with the corner metal fittings, making it easier to install the parts, and When assembling the outer frame, there is no need to select a corner fitting suitable for the parts protruding from the outer frame, and it can be attached to any corner, making assembly very convenient.

Furthermore, by arranging the locations and the number of through holes to be installed within the range of the elongated holes, the range of compatibility with various parts can be expanded.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the ceiling inspection port according to the present invention, Fig. 2 is a sectional view, Fig. 3 is a perspective view showing the mounting state of the bearing, and Fig. 4 is a perspective view showing the corner of the outer frame on the bearing side. , FIG. 5 is a perspective view showing the mounting state of the lock bar receiver, FIG. 6 is a perspective view showing the corner portion of the outer frame on the lock bar receiver side, and FIG. 7 is a perspective view of the corner fitting. 1... Outer frame, 2... Corner fitting, 3... Bearing, 4... Inner frame, 5... Rotating shaft, 9... Lock bar receiver, 10... Wing piece, 11... Long hole, 12a, 1
2b, 14a... projections.

Claims (1)

[Scope of utility model registration request] A framed inner frame is fitted into an outer frame framed by approximately L-shaped corner fittings forming two wing pieces, and rotated by a rotating shaft provided in the inner frame and a bearing provided in the outer frame. In the ceiling inspection opening that can be pivoted, the two wing pieces of the corner fitting are formed with vertical elongated holes symmetrical to the folded line, and the holes are formed in the opposite direction of the outer frame in which the corner fitting is arranged. A component such as a bearing to be installed on the side surface is fixed to the outer frame with a pin by passing a mounting protrusion protruding from the back side of the component through a through hole formed in the outer frame and positioning it in the elongated hole. A ceiling inspection port that is characterized by a