JPH11311017A - Inner frame locking device for ceiling inspection opening - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inner frame locking device for a ceiling inspection opening, easily fittable to an inner frame in a single operation and capable of executing opening/closing operation very easily only by performing pull operation of an operating plate part only at the time of opening the inner frame while locking automatically at the time of closing the inner frame. SOLUTION: A locking member 1 fitted to an inner frame 2 is provided with a fitting plate part 11 fixed to the inner frame 2, a spring plate part 12 projecting downward from its base end continuously with the upper part of the fitting plate part 11, a horizontal plate part 12a formed by bending the tip of the spring plate part 12 horizontally so that the bottom face of one end part comes in face contact with the inner surface of a lower flange of an outer frame in the normal state, a continuous shaft part 13a continuous with the bottom face of the horizontal plate part 12a and positioned in a cutout part 21a of the inner frame 2, and a horizontal operating plate part 13 continuous with the continuous shaft part 13a and positioned on the lower side of a lower flange 21 of the inner frame 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling inspection port for inspecting and repairing facilities such as piping and wiring disposed inside a ceiling of a building. TECHNICAL FIELD The present invention relates to an inner frame locking device for a ceiling inspection port that maintains a formed state.

[0002]

2. Description of the Related Art FIG. 8 is an exploded perspective view showing a conventional inner frame locking device for a ceiling inspection port. The inner frame locking device for the ceiling inspection port includes a rotating member 4 and a fixing member 5. The rotating member 4 includes an operation shaft 41, a flat latch 42 provided at an upper end of the operation shaft 41, and an operation head 43 provided at a lower end of the operation shaft 41. A stopper 42a is provided at one end of the flat latch 42 so as to be engaged with and disengaged from the flange 23 of the inner frame 2.

The fixing member 5 includes a substrate 52 having a through-hole 52a into which the operation head 43 is fitted, a semi-cylindrical cover 51 for holding the operation shaft rising from the substrate 52, and a continuous body from the cover 51. Arm 5 protruding left and right
3, a split tube 53a protruding from and communicating with a through hole formed in the plane of each arm 53, and an internal pin 54 fitted into the split tube 53a.

Further, the inner frame 2 comprises a vertical plate portion 22, an upper flange 23 and a lower flange 21 provided at the upper end of the vertical plate portion 22. A mounting hole 28 into which the split cylinder 53a is fitted is formed in a plane of the vertical plate portion 22, and a notch portion 23 for supporting an upper portion of the operation shaft 41 is formed in the upper flange 23.
a, and the lower substrate 21 is provided on the lower flange 21.
Are formed at corresponding positions.

In order to mount the locking device on the inner frame 2, the operating shaft 41 is fitted into the cover body 51, the operating head 43 is fitted into the through hole 52a, and the rotating member 4 and the fixed member 5 are integrated. combine. In this state, the upper part of the operation shaft 41 is aligned with the notch 23a, the split cylinder 53a is inserted into the mounting hole 28, and the substrate 52 is positioned on the lower surface of the notch 29,
That is, the lower flange 21 is brought into contact with the bottom surface. here,
The internal pin 54 is separated from the through hole of the arm 53 by the split cylinder 53a.
Type in. As a result, the split cylinder 53a is
To be tightly fixed.

The closed state of the inner frame 2 with respect to the outer frame is locked by the tip of the rotatable flat latch 42 resting on the upper flange of the outer frame. To release the locked state, the operation head 43 is rotated, so that the flat latch 4
2 rotates and retracts from the upper flange of the outer frame. As a result, the inner frame 2 having no support pivots downward by its own weight. When the inner frame 2 is closed from the open state, the inner frame 2 is rotated so that the lower flange of the inner frame and the lower flange of the outer frame are flush with each other, By rotating the 43, the flat latch 42 is moved onto the upper flange of the outer frame.

[0007]

In the conventional inner frame locking device for the ceiling inspection opening, when the locking device (rotating member, fixed member) is attached to the inner frame, the rotating member and the fixed member are integrally connected in advance. After that, after the operation shaft is positioned at the notch, the split cylinder and the mounting hole are aligned and fitted, it is necessary to drive the driving pin 26 while maintaining this state. These positioning and inlaying work are not troublesome, and there are many disadvantages in mounting work, such as the necessity of opening mounting holes and the necessity of separately installing driving pins. .

Further, each time the inner frame is closed and opened, it is necessary to rotate the operation head to rotate the flat latch. This operation has to be rotated using a screwdriver or the like with respect to the groove of the operation head, and the rotation direction cannot be visually checked.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and enables the locking member to be easily and easily attached to the inner frame by one operation, and automatically locks when the inner frame is closed. Just pull the operation plate only when it is open,
An object of the present invention is to provide a locking device for a ceiling inspection opening that can be opened and closed very easily.

[0010]

In order to achieve this object, a locking device for a ceiling inspection port according to the present invention has the following configuration. The locking device of the ceiling inspection opening is an outer frame,
An inner frame rotatably provided with respect to the outer frame; and a locking member provided on the inner frame to maintain a closed state of the inner frame, wherein the locking member is mounted on the inner frame. A plate portion, a spring plate portion whose base end is continuous with the upper portion of the mounting plate portion and projects outward downward, and a distal end of the spring plate portion is bent horizontally, and a bottom surface is a lower flange of an outer frame in a normal state. A horizontal plate portion in contact with the inner surface of the horizontal plate portion, a continuous shaft portion continuous with the bottom surface of the horizontal plate portion and located in the cutout portion of the inner frame, and a lower side of the lower flange of the inner frame continuous with the continuous shaft portion. And a horizontal operation plate portion located at

In the locking device of the ceiling inspection opening having such a configuration, the locking member is attached and fixed to the inner frame by a simple operation. In other words, for the fitting groove of the upper flange of the inner frame,
The upper part of the mounting plate part is fitted, and the protruding shaft part is fitted tightly into the through hole of the vertical plate part of the inner frame. Therefore, by vertically fitting the protruding shaft portion into the through hole, the vertical movement of the mounting plate portion (locking member) is prevented. Also, by fitting the mounting plate into the fitting groove, the mounting plate (locking member)
To prevent left and right movement. Thereby, the locking member can be completely fixed to the inner frame by one simple operation.

The spring plate of the locking member is constantly urged outward. Therefore, in the closed state of the inner frame, the lower portion of the spring plate portion urged outward, that is, the bottom surface of one end of the horizontal plate portion (the bent portion that is continuous with the spring plate portion) is positioned at the lower portion of the outer frame. Contact the inner surface of the flange. As a result, the inner frame is supported and the closed state is locked.

To open the closed inner frame, the operation plate is pulled inward of the inner frame. Thereby, the spring plate portion, that is, the horizontal plate portion moves in the moving direction of the operation plate portion against the urging spring force. As a result, (the end of) the horizontal plate portion that has been in contact with the inner surface of the lower flange of the outer frame is retracted, and comes off the state of contact with the lower flange end of the outer frame. Thereby, the inner frame rotates with respect to the outer frame by its own weight, and the closed state is opened.

When closing the opened inner frame, the lower flange of the inner frame is rotated in a direction flush with the lower flange of the outer frame. At the time of this rotation, the spring plate portion that has returned to the outwardly projecting spring is pressed inward by coming into contact with the lower flange end of the outer frame, and the spring plate portion, that is, the horizontal plate portion, has a spring force. In the direction of the vertical plate of the inner frame. The spring plate portion passes through the lower flange end of the outer frame in a state where the overhang state is reduced. That is, when the lower flange of the outer frame and the lower flange of the inner frame are flush with each other, the spring plate returns to the spring state, and the bottom surface of the end of the horizontal plate contacts the inner surface of the lower flange of the outer frame. Therefore, when the inner frame is closed, the lock is automatically applied.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a locking device for a ceiling inspection port according to the present invention.

As shown in FIGS. 3 and 4, the ceiling inspection opening includes an inner frame 2, an outer frame 3, and a locking member 1 provided in the inner frame 2.
It is composed of As shown in FIGS. 3 and 4, for example, the inner frame 2 and the outer frame 3 are formed by cutting a steel piece, an aluminum alloy material, or the like into a frame piece of a predetermined length, butting it into a square shape, and forming a frame. The frame is fixed using A.

As shown in FIG. 3, the inner frame 2 of the ceiling inspection opening
The hinge shaft 26 projecting from the corner fitting A provided at the corner portion is rotatably (openable / closable) within the frame opening of the outer frame 3 by being supported by a bearing 33 provided on the outer frame 3. . Further, a lid 25 is attached to the inner frame 2.

As shown in FIGS. 1 and 4, the inner frame 2 includes a lower flange 21, a vertical plate 22 rising from the plane of the lower flange 21, and an upper flange 23 having the upper end of the vertical plate 22 bent. , And a fitting groove 24 formed by an upper portion of the vertical plate portion 22 and an upper flange 23. Further, FIG.
As shown in FIG. 2 and FIG. 2, the lower flange 21 is provided on the labor side of the inner frame 2 (the side opposite to the portion supported by the outer frame 3).
A notch 21a having a predetermined width and a predetermined depth is opened at the center.

As shown in FIGS. 4 and 5, the outer frame 3 includes a lower flange 31 and a vertical plate portion 32 rising from the plane of the lower flange 31.
Is bent at its upper end to form an upper flange 34.

As shown in FIGS. 1 and 2, the locking member 1 is made of a synthetic resin material or a metal plate material, and has a mounting plate 11 and a base end connected to the upper portion of the mounting plate and downward. A spring plate portion 12 that protrudes outward, a horizontal plate portion 12a in which the tip of the spring plate portion is bent horizontally, a continuous shaft portion 13a continuous with the bottom surface of the horizontal plate portion, and a continuous shaft portion continuous with the continuous shaft portion. And an operation plate 13.

The mounting plate 11 is formed as a rectangular flat plate having a thickness such that an upper portion thereof fits into the fitting groove 24 of the inner frame 2. In the plane of the mounting plate 11, a mounting projection (projection shaft) 11a having a tip whose swelling degree increases from above to below as shown in FIG. This protruding shaft portion 11
a is a through hole 22a opened in the vertical plate portion 22 of the inner frame 2.
To fit tightly.

The spring plate portion 12 is formed as an inclined rectangular flat plate projecting outwardly downward, and an upper bent base end is connected to an upper outer surface of the mounting plate portion 11. Further, the tip of the spring plate portion 12 is bent inward to provide a horizontal horizontal plate portion 12a. One end of the horizontal plate portion 12a, that is, a bent portion continuous with the spring plate portion 12 is set so as to be in contact with the inner surface (upper surface) of the end of the lower flange 31 of the outer frame 3 in a normal state.

Further, between the spring plate portion 12 and the horizontal plate portion 12a, a reinforcing rib 14 for reinforcing the spring is provided on the inner surface side.

The operation plate portion 13 is a horizontal flat plate, which is disposed below the lower flange 21 of the inner frame 2 in parallel with the lower portion, and which extends through a vertical continuous shaft portion 13a projecting from the inner surface. It is continuous with the plate portion 12a. Further, the continuous shaft portion 13a is located in the notch portion 21a of the lower flange 21 of the inner frame 2, and moves forward and backward (reciprocates left and right) in the notch portion 21a. Further, a swelling portion 13b for allowing the operation plate portion 13 to be held in a horizontal state and to be able to move horizontally is protruded from an inner surface on one end side of the operation plate portion 13, and is normally (in an inner frame closed state). ), The bulging portion 13b is in contact with the outer surface of the end of the lower flange 31 of the outer frame.

In the locking device of the ceiling inspection opening having such a configuration, as shown in FIG. 1 and FIG.
When fixing the mounting plate 11, the upper part of the mounting plate 11 is fitted into the fitting groove 24 of the inner frame 2. In this state, when the mounting projection (projection shaft) 11a is fitted into the through hole 22a of the inner frame 2, the upper end of the projection shaft 11a has a smaller degree of swelling than the lower end. For this reason, it can be tightly fitted by an easy fitting operation.

By vertically fitting the protruding shaft portion 11a into the through hole 22a, the vertical movement of the mounting plate portion (locking member 1) 11 is prevented. Further, by fitting the mounting plate portion 11 into the fitting groove portion 24 to prevent the mounting plate portion 11 from moving in the left-right direction, the locking member 1 can be completely inserted into the inner frame 2 by one simple operation. Can be fixed.

The opening and closing operation of the inner frame 2 with respect to the outer frame 3 is executed as follows. As shown in FIG. 5, in the closed state (normal state) of the inner frame 2, the bottom of the spring plate portion 12 urged outward, that is, the bottom surface of one end of the horizontal plate portion 12 a is
The outer frame 3 is in contact with the inner surface of the end of the lower flange 31.
As a result, the inner frame 2 is supported, and the closed state is locked.

When the inner frame 2 in the closed state is opened, as shown in FIG.
2 directions). Thereby, the continuous shaft portion 13a moves in the notch portion 21a toward the vertical plate portion 22 together with the operation plate portion 11. The horizontal plate portion 12a is pulled by the movement of the continuous shaft portion 13a, and the spring plate portion (horizontal plate portion 12a) 12 moves in the moving direction of the operation plate portion 13 against the urging spring force. That is, the degree of outward extension of the spring plate portion 12 is reduced. As a result, as shown in FIG. 6, the end of the horizontal plate portion 12 a that has been in contact with the inner surface of the lower flange 31 of the outer frame 3 is retracted, and comes off from the end of the lower flange 31 of the outer frame 3. Here, the inner frame 2 rotates with respect to the outer frame 3 by its own weight, and releases the closed state.

When closing the inner frame 2 in the open state, the lower flange 21 of the inner frame 2 is rotated in a direction flush with the lower flange 31 of the outer frame 3. At this time, the spring plate portion 12 that has been spring-returned outwardly in a protruding shape is pressed inward by contacting the end of the lower flange 31 of the outer frame 3,
The spring plate portion (horizontal plate portion 12a) 12 moves toward the vertical plate portion 22 of the inner frame 2 against the spring force. As shown in FIG.
In a state where the protruding state of the spring plate portion 12 is reduced, the horizontal plate portion 12a (bending continuous portion with the distal end portion of the spring plate portion 12)
It passes through the lower flange 31 end of the outer frame 3. That is, when the lower flange 31 of the outer frame 3 and the lower flange 21 of the inner frame 2 are flush with each other, the spring plate portion 12 returns to the spring state, and the bottom surface of the end of the horizontal plate portion 12a is fixed to the lower flange of the outer frame 3. The inner frame 2 is in contact with the inner surface at the end 31 and holds the locked state of the inner frame 2. Therefore,
When the inner frame 2 is closed, it is automatically locked without any operation.

[0030]

According to the present invention, the upper portion of the mounting plate of the locking member is fitted into the fitting groove of the inner frame as described above.
The mounting projection that protrudes from the mounting plate is fitted into the through hole of the vertical plate of the inner frame, so the fitting work is easy and the locking member is attached to the inner frame with a single simple operation. Can be fixed. Also, by vertically fitting the mounting projection to the through hole, the vertical movement of the locking member is prevented, and by fitting the mounting projection to the through hole, the horizontal movement of the locking member is reduced. It can be blocked and a simple and complete fixation can be achieved. In addition, the spring plate portion of the locking member is always urged outward, so that the end of the horizontal plate portion continuous with the tip of the spring plate portion is in contact with the inner surface of the lower flange of the outer frame in a normal state. Therefore, when the inner frame is opened, the lock can be easily released simply by slightly pulling the operation plate portion inward. Furthermore, when closing the inner frame, the spring plate is pressed by the lower flange end of the outer frame, moves inward against the spring, and then returns to the spring when the spring plate passes through the lower flange end. Locked automatically. Therefore,
The present invention has an excellent effect of attaining the object of the invention, for example, when the inner frame is closed, a closing lock operation is not required.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a locking member is attached to an inner frame.

FIG. 2 is an exploded perspective view showing an inner frame and a locking member.

FIG. 3 is a plan view showing a ceiling inspection port according to the embodiment.

FIG. 4 is a perspective view showing a state in which an inner frame is opened from an outer frame.

FIG. 5 is an explanatory sectional view showing a closed state of the inner frame.

FIG. 6 is an explanatory sectional view showing a state in which the lock of the locking member is released.

FIG. 7 is an explanatory cross-sectional view showing a state in which the inner frame is being closed with respect to the outer frame.

FIG. 8 is an exploded perspective view showing a conventional inner frame locking device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Locking member 2 Inner frame 3 Outer frame 11 Mounting plate part 12 Spring plate part 13 Operation plate part 11a Mounting projection part 12a Horizontal plate part 13a Continuous shaft part 21 Lower flange 22 Vertical plate part 23 Upper flange 24 Fitting groove part 21a Notch Part 21b through hole 31 lower flange 32 vertical plate part

Claims (2)

[Claims] 1. An inner frame locking device for a ceiling inspection opening, comprising: an outer frame; an inner frame rotatably provided with respect to the outer frame; and a locking member provided on the inner frame to maintain a closed state of the inner frame. In the device, the locking member includes an attachment plate portion attached to the inner frame,
A spring plate part whose base end is continuous with the upper part of the mounting plate part and protrudes outward downward, and the tip of the spring plate part is bent horizontally, and the bottom surface is normally in contact with the inner surface of the lower flange of the outer frame. A horizontal plate portion facing, a continuous shaft portion continuous with the bottom surface of the horizontal plate portion and located in the notch portion of the inner frame, and a horizontal portion continuous with the continuous shaft portion and located below the lower flange of the inner frame. An inner frame locking device for a ceiling inspection opening, comprising: 2. The mounting plate portion of the locking member has an upper portion fitted into an upper fitting groove portion of the inner frame, and an in-plane mounting protruding portion fitted tightly into a through hole of the inner frame. The inner frame locking device for a ceiling inspection opening according to claim 1, wherein the inner frame locking device is fixed to a frame.