JPS5820038Y2 - Inner frame support device for ceiling inspection opening - Google Patents

Description

[Detailed description of the invention] This invention relates to a ceiling inspection port placed on the ceiling for later inspection and repair of electrical wiring and various piping installed behind the ceiling, and in particular for the outer frame. The present invention relates to an inner frame support device for supporting an inner frame so that it can be opened and closed.

In the conventional inner frame support device, a knob for opening and closing the inner frame protrudes from the front side of the inner frame so that the inner frame can be opened and closed from the surface side of the ceiling.

For this reason, the aesthetic appearance of the ceiling surface is impaired, and it is necessary to provide holes, notches, etc. at accurate positions in the ceiling plate attached to the inner frame, through which knobs and the like pass.

This invention eliminates the shortcomings of conventional inner frame support devices for ceiling inspection ports, and creates an inner frame support device that reduces the number of parts, is easy to manufacture and install, and can perform reliable opening/closing operations. It provides:

Embodiments of this invention will be described below based on the accompanying drawings.

As shown in Fig. 1, the ceiling inspection opening to which the inner frame support device of this invention is attached is made up of an inner frame 2 which is pivotally attached to an outer frame 1 formed in a rectangular shape with a shaft pin 8 so as to be openable and closable. The inner frame support device is attached at one or two appropriate positions between the outer frame 1 and the inner frame 2.

According to the first embodiment shown in FIGS. 2 to 7, the cam body 6 of the inner frame support device is attached to the base plate 10 as shown in FIG.
It is attached to the outer surface of the inner frame 2 via.

As shown in FIG. 4, the cam body 6 is formed into a substantially wedge shape, and has a locking edge 3 cut out in a substantially upside-down shape at its lower end. An upper edge 4 and a lower edge 5 are formed that extend from both ends at an angle in the same direction.

As shown in FIGS. 2 and 3, on the inner surface of the outer frame 1 facing the cam body 6, the upper end of a rod-shaped elastic body 7 is fixed via a mounting base 11. A protrusion 9 that projects toward the cam body 6 is formed at the lower free end of the body 7 .

As shown in FIGS. 3 and 5, the elastic body 7 is in a state where the locking edge 3 of the cam body 6 is not locked with the protrusion 9.
The elastic body 7 is suspended downward from the mounting position on the mounting base 11, and the elastic body 7 is located on a vertical line.

In addition, when the locking edge 3 of the cam body 6 is locked to the protrusion 9, the elastic body 7 has its lower free end as shown in FIGS. 4, 6, and 7. It is biased toward the side that presses the locking edge 3 and can be elastically deformed by sliding against the lower edge 5 and upper edge 4 of the cam body 6 by opening and closing the inner frame 2. This allows the protrusion 9 of the elastic body 7 to be engaged and disengaged from the locking edge 3 of the cam body 6 by simply moving the inner frame 2 up and down.

In the inner frame support device of this first embodiment, as shown in FIG. It is pressed to the left, and in this state the inner frame 2 is supported within the outer frame 1.

In order to open the inner frame 2 from the closed state shown in FIG. 4, push up the inner frame 2 and push the protrusion 9 of the elastic body 7 away from the locking edge 3 of the cam body 6, as shown in FIG. When removed, the elastic body 7 returns to a state in which no external force is applied, and the protrusion 9 moves along a vertical line passing through the elastic body 7.

In this state, when the inner frame 2 is lowered, as shown in Figure 6,
The lower edge 5 of the cam body 6 comes into contact with the protrusion 9, and by further lowering the inner frame 2, the lower edge 5 of the cam body 6 descends while pressing the protrusion 9 to the right in the drawing, and the protrusion 9 It moves around the upper end of the cam body 6 and separates from the cam body 6, and the open front end of the inner frame 2 is released from the outer frame 1.

In addition, in order to support the open inner frame 2 again in the closed state shown in FIG. 4, if the open front end of the inner frame 2 is pushed up toward the outer frame 1, as shown in FIG. , the upper edge 4 of the cam body 6 first comes into contact with the protrusion 9 of the elastic body 7, and by further pushing up the inner frame 2, the protrusion 9 slides on the upper edge 4 while being displaced to the left in the drawing. After passing the lower end of this upper edge 4, the restoring force of the elastic body 7 presses against the locking edge 3, and in this way, the inner frame 2 is moved against the outer frame 1 as shown in FIG. It is supported in a closed position.

Next, according to the second embodiment shown in FIG. 8, the cam body 6 fixed on the outer surface of the inner frame 2 has a substantially diamond-shaped cross section, and the cam body 6 has a substantially diamond-shaped cross section. A locking edge 3 is formed with a notch shaped like an inverted letter (close to a box-shaped shape), and when the protrusion 9 of the elastic body 7 is locked to the locking edge 3, the elastic body 7 is positioned on a vertical line.

Therefore, according to the inner frame support device of the second embodiment, the elastic body 7 is attached to the locking edge 3 of the cam body 6 by vertically operating the inner frame 2, as in the case of the first embodiment. The protrusion 9 can be engaged and disengaged, thereby allowing the inner frame 2 to be opened and closed with respect to the outer frame 1. In addition, the protrusion 9 can be attached to the cam body 6 without any external force acting on the elastic body 7 in the left and right direction. Locking edge 3
Since the inner frame 2 can be supported by being engaged with the outer frame 1, the inner frame 2 can be stably supported by the outer frame 1.

According to the inner frame support device according to the third embodiment shown in FIGS. 9 and 10, the elastic body 7 attached to the inner surface of the outer frame 1 is formed of a leaf spring, and the upper part Mounting stand 11
are integrally formed, and the work of attaching it to the inner surface of the outer frame 1 is extremely easy compared to the rod-shaped elastic body 7 in the first embodiment.

Since the inner frame support device of this invention is constructed as described above, the knobs for opening and closing the inner frame 2 are not exposed on the front side of the ceiling surface, and the aesthetic appearance of the ceiling surface is not spoiled. In addition, it is not necessary to provide holes, notches, etc. necessary for protruding knobs, etc. on the ceiling plate attached to the inner frame 2.

Furthermore, according to the inner frame support device of this invention, since the elastic body 7 itself is formed with the protrusion 9 that locks on the locking edge 3 of the cam body 6, the structure is extremely simple compared to the conventional one. It is simple, easy to install, and can be manufactured at low cost. In addition, since the protrusion 9 is directly attached to the elastic body 7, the return force of the elastic body 7 acts directly on the cam body 6. Thus, a reliable engagement relationship between the protrusion 9 and the cam body 6 can be obtained, and the inner frame can be opened and closed reliably.

[Brief explanation of drawings]

Fig. 1 is a plan view of a ceiling inspection opening to which the inner frame support device according to the first embodiment of this invention is applied, and Fig. 2 is a plan view of the ceiling inspection port II of Fig. 1.
-II line sectional view, FIG. 3 is a plan view of the elastic body used in the inner frame support device of the first embodiment, and FIG. 4 is the I of FIG.
It is a sectional view taken along the line V-IV and is an explanatory diagram showing the inner frame support device of the first embodiment with a part of the inner frame cut away. An explanatory diagram showing the opening/closing operation, FIG. 8 is an explanatory diagram of the inner frame support device according to the second embodiment,
FIG. 9 is a side view of the inner frame support device according to the third embodiment, and FIG. 10 is a plan view of an elastic body used in the inner frame support device of the third embodiment. 1... Outer frame, 2... Inner frame, 3...
...Locking edge, 4...Top edge, 5...
Lower edge, 6...Cam body, 7...Elastic body, 9...Protrusion.

Claims (1)

[Scope of utility model registration request] On the outer surface of the inner frame 2 which is pivotally attached to the outer frame 1 so as to be freely openable and closable, there is a locking edge 3 cut out in a substantially inverted shape at the lower end, and from both ends of the locking edge 3 A cam body 6 having an upper edge 4 and a lower edge 5 extending in the same direction is fixed, and a locking edge 3 is provided on the inner surface of the outer frame 1 facing the cam body 6. In an inner frame support device provided with a protrusion 9 that engages and disengages, the protrusion 9 has an upper end fixed to the inner surface of the outer frame 1 and a lower free end biased toward the side that presses the locking edge 3. At the same time, the elastic body 7 is protruded from the free end portion of the elastic body 7 which can be elastically deformed by sliding on the lower edge 5 and the upper edge 4 when the inner frame 2 is opened and closed. An inner frame support device for a ceiling inspection opening, characterized in that a protrusion 9 is formed to engage and disengage from a locking edge 3 of a cam body 6.