JPS5857592B2 - Ceiling inspection port locking device - Google Patents

Description

[Detailed Description of the Invention] The present invention is designed to be installed within an outer frame by clicking a button on a ceiling inspection opening installed in order to inspect and repair various equipment such as wiring, piping, and air ducts installed inside the ceiling. This relates to a locking device that opens and closes an inner frame.

The ceiling inspection opening is pivoted by a rotating support device on one side of the inner frame fitted inside the outer frame, and is fixed and detached by a locking device on the other side. A device is known in which a lock bar that moves forward and backward in both left and right directions is inserted into a through hole provided in a receiving fitting on the frame side and can be locked therein.

However, with this bracket, the lock bar and bracket may be deformed due to the weight of the inner frame or pushing the inner frame upwards more than necessary.
Further, the inner frame is displaced within the outer frame, and the lock bar cannot be inserted into the through hole of the receiving metal fitting, resulting in the locking device not operating.

For this reason, a guide p to prevent the inner frame from shifting within the outer frame and a stopper to restrict the amount of insertion of the inner frame into the outer frame were provided, but these were provided integrally with the corner fittings that framed the outer frame. was.

However, since this is a separate piece from the receiving bracket and the corner bracket with guide and stopper functions, it has the disadvantage that it may not be able to be inserted smoothly due to errors during assembly or slight deviations after installation on the ceiling surface. had.

The present invention was proposed in view of these circumstances, and it prevents the influence of errors in the frame and slight deviations after installation, and also strengthens the receiving bracket itself to reduce the weight of the inner frame. The ceiling inspection opening is designed to prevent the deformation and damage of the receiving fittings due to excessive pushing up of the closed inner frame, and to prevent the lock bar from being deformed and the locking device to become inoperable. A locking device is provided.

An embodiment of the present invention will be specifically described below with reference to the drawings.

Referring to the figure, reference numeral 1 is an outer frame, which is fitted into an opening in the ceiling and fixed with appropriate mounting brackets. An inner frame 2 is provided inside this outer frame 1, and The inner frame 2 is supported on the one hand by a rotary support device 3 and is locked by a locking device 4 by an external force.

The outer frame 1 is integrally constructed in a ring shape by framing four frame pieces 1a to 1d in a rectangular shape and joining the abutted parts with corner fittings 5, and the inner frame 2 is similarly constructed by four frame pieces 1a to 1d. The pieces 2a to 2d are framed in a rectangular shape, their butt parts are joined with corner fittings 6, and ceiling finishing material (
(not shown) is placed to form a plate-like structure.

The rotation support device 3 is configured to rotatably support a rotating shaft protruding left and right on the inner frame 2 side by bearings on the outer frame 1 side.

Next, the locking device 4, which is the main focus of the present invention, will be explained. A mounting plate 7 is fixed to the center of the back end of the inner frame 2.
A balance-type lever 8 is attached here so that it can be rotated with a screwdriver or the like from the front side of the inner frame, and lock bars are provided at both ends of the lever 8, respectively, extending substantially parallel to the edge of the mounting plate side of the inner frame 2. 9 are connected at one end.

Corner fittings 6 provided at the corners of the scraped inner frame 2
A support part 11 is integrally provided at one end of the kite part 10 which is bent and protrudes outward, and the support part 11 is bent inwardly. The lock par 9 is positioned by inserting it through the hole.

Frame piece 1a that can be placed on the frame body side on the lock bar extension line
, 1c are each fitted with a receiving metal fitting 13, and this receiving metal fitting 13 has a slotted cylindrical body 15 protruding from approximately the center of one surface of a flat board 14 gB. 16 is inserted and the cylindrical body 15 is expanded into a funnel shape so that it is fixed to the frame pieces 1a and 1c.

A plate-shaped lock bar receiving portion 17 is horizontally protruded from the upper part of the other force surface of the base plate 14 in the width direction, and a tapered portion 18 is provided at the rear of the plate-shaped lock bar receiving portion 17, and the tip of the lock bar 9 is connected to the tip of the lock bar 9. In order to be able to be engaged and placed by point contact, the lock bar holder 17 is connected to the lower part of the lock bar receiver 17, and is continuous with the lock bar receiver 17 and extends substantially along the length of the substrate 14. A stopper 21 is provided with a rib-shaped guide portion 19 projecting inwardly from the base plate 14, with the lower end of the guide portion 19 being above the lower end of the base plate 14, and against which the outward protruding edge 20 of the lower end of the inner frame 2 comes into contact. is formed.

Thus, since the present invention is constructed as described above, when the locking device 4 rotates the lever 8 and the locking member 9 is pulled inward and removed from the locking bar receiving portion 17 of the receiving fitting 13, the inner frame 2 is removed. The end of the locking device becomes free.

Then, by rotating the inner frame 2 downward and lowering it vertically, the ceiling inspection port opens.

Next, the inner frame 2 is rotated upward and fitted into the outer frame 1,
When both frame pieces 1a to 1d and 2a to 2d overlap so that their lower ends are aligned, the outward projecting edge 2 of the inner frame 2
0 hits the stopper 21 of the receiving metal fitting 13 provided at the lower end of the board 14, and the inner frame 2 no longer enters.

At this time, the lock par 9 located slightly above the top surface of the plate-shaped lock bar receiving part 17 provided in the width direction of the receiving metal fitting 13 is caused to protrude by rotating the lever 8 and onto the top surface of the lock bar receiving part 17. By engaging and mounting, the inner frame 2 is held in a closed state.

Of course, when the lock bar 9 is engaged and placed on the lock bar receiving part 17, since the lock bar receiving part 17 is formed into a flat plate shape and the receiving part of the lock par 9 is made wide, there will be some movement in the protruding direction of the lock par 9. Even if there is an error, the engagement is ensured.

Furthermore, the guide portion 10 integrally molded on the corner fitting 6 on the side of the inner frame 2 comes into contact with the guide portion 19 of the bracket 13 on the side of the outer frame 1, and the left and right position of the inner frame 2 is thus regulated. 1
The gap between the opening end and the inner frame 2 is kept constant.

Furthermore, the lower surface of the lock bar receiving part 17 is supported by the upper end of the lip-shaped guide part 19, and the board 14 is reinforced by the entire guide part 19, so that the lock bar receiving part 17 is supported by the weight of the inner frame 2, etc.
This prevents the substrate 14 from being deformed.

The present invention has the configuration as described above, and includes a receiving metal fitting 1.
Reference numeral 3 includes a lock bar receiving part 17 for receiving the lock bar 9, a stopper 21 for regulating the amount of insertion of the inner frame 2, and a guide part 19 for preventing the inner frame 2 from shifting in the lateral direction. The influence of errors in the framework of the outer frame and slight deviations after attachment to the ceiling surface is extremely small, and the insertion movement of the inner frame can be reliably guided and regulated to a predetermined position.

Further, since the guide portion 19 is formed in a rib shape along the length direction of the substrate 14, and its upper end is formed continuously with the lower surface of the lock bar receiving portion 17, the lock bar receiving portion 17$
- The base plate 14 is reinforced so that it will not be deformed or damaged by the weight of the inner frame, and the inner frame can be prevented from sagging and the locking device cannot be operated.

[Brief explanation of drawings]

Figure 1 is a plan view of the entire ceiling inspection port to which the present invention is applied, Figure 2 is a sectional view of part A in Figure 1, Figure 3 is a perspective view of the corner of the outer frame, and Figure 4 is the inner frame. Perspective view of corner section, Figure 5a,
b is a front view and a sectional view of the locking device receiving metal fitting. 1...Outer frame, 2...Inner frame, 3...
... Rotation support device, 4... Locking device, 5, 6.
... corner metal fittings, 9 ... lock bar,
13... Receipt 4 14... One board, 17.
... Lock bar receiving part, 19 ... Guide part, 20 ... Outward projecting edge, 21 ... Stopper.

Claims (1)

[Claims] 1 A rectangular inner frame having an outward protruding edge at the lower end is fitted into a rectangular outer frame, and is pivotally supported to the outer frame by a rotation support device on one side so as to be openable and closable, and on the other side. A lock bar provided on the open end side of the inner frame and a bracket attached to the inside of the outer frame on the extension line of the lock bar are used to lock and release the ceiling inspection opening. forms a plate-shaped lock bar receiving part that projects horizontally across the width of the flat plate fixed to the inner wall of the outer frame and engages and places the lock bar that moves back and forth in a straight line. ,
A rib-shaped guide part is formed that extends substantially longitudinally continuously from the lower surface of the receiving part and contacts the side wall of the inner frame, and the guide part is arranged such that the lower end of the guide part is above the lower end of the substrate. A locking device for a ceiling inspection opening, characterized in that the lower end of the ceiling serves as a stopper.