JP7269813B2 - inspection door - Google Patents

Description

The present invention relates to an inspection opening such as a ceiling inspection opening, a wall inspection opening, or a floor inspection opening.

Inspection openings generally include a ceiling inspection opening provided in the ceiling, a wall inspection opening provided in the wall, a floor inspection opening provided in the floor, and the like. For example, a ceiling inspection door is installed in a rectangular opening formed in the ceiling. The ceiling inspection door generally includes an outer frame attached over the inner peripheral edge of the opening and an inner frame functioning as a frame material for the lid. Such a ceiling inspection door is designed to open and close a lid with a ceiling material or a gypsum board material (hereinafter referred to as a cover plate) on the inner side of the inner frame with respect to the outer frame.

The inspection door is usually provided with a locking device capable of locking the inner frame with respect to the outer frame. As a locking device for a conventional ceiling inspection door, there has been proposed a locking device that is inconspicuous and easy to lock (see, for example, Patent Document 1).

JP 2018-204369 A

2(D) and 2(E), the locking device for the ceiling inspection door described in Patent Document 1 has a first pivotal support portion 51c, which is the rotation shaft of the first holding plate 51, and a , and a second pivotal support portion 52 d which is the rotation shaft of the second holding plate 52 . That is, the locking device is a complicated mechanism having two rotating shafts, such as the first pivotal support portion 51c and the second pivotal support portion 52d. Furthermore, as shown in FIG. 3C of Patent Document 1, the locking device allows the first holding plate 51 to be pushed rearward by hand without pushing the first holding plate 51 upward with the unlocking tool 9. It can be easily unlocked, so it cannot be said that the security is high.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an inspection door that can improve security with a simple mechanism.

In order to solve the above-described problems, an inspection opening according to a first invention includes an outer frame disposed on the inner peripheral edge of an opening,
an inner frame that is openable and closable inside the outer frame;
an engaging member provided on the inner frame;
a locking leaf spring provided on the outer frame and engaged with the engaging member to prevent the inner frame from opening with respect to the outer frame;
a gap formed between the inner frame and the outer frame into which an unlocking tool can be inserted;
The locking leaf spring has a receiving portion for receiving the unlocking tool inserted into the gap,
The locking leaf spring is bent and deformed by the operation of the unlocking tool received by the receiving portion, thereby releasing the engagement with the engaging member,
a contact surface due to engagement between the engaging member and the locking leaf spring is substantially perpendicular to a direction in which the inner frame opens with respect to the outer frame;
The operation of the unlocking tool for releasing the engagement between the engaging member and the locking leaf spring is movement of the receiving portion in the direction along the contact surface.

In order to solve the above-mentioned problems, an inspection door according to a second invention includes an outer frame arranged on the inner peripheral edge of the opening,
an inner frame that is openable and closable inside the outer frame;
an engaging member provided on the inner frame;
a locking leaf spring provided on the outer frame and engaged with the engaging member to prevent the inner frame from opening with respect to the outer frame;
a gap formed between the inner frame and the outer frame into which an unlocking tool can be inserted;
The locking leaf spring has a receiving portion for receiving the unlocking tool inserted into the gap,
The locking leaf spring is bent and deformed by the operation of the unlocking tool received by the receiving portion, thereby releasing the engagement with the engaging member,
a contact surface due to engagement between the engaging member and the locking leaf spring is inclined with respect to a direction in which the inner frame opens with respect to the outer frame;
The operation of the unlocking tool for releasing the engagement between the engaging member and the locking leaf spring is further insertion of the unlocking tool received by the receiving portion.

In addition, the inspection opening according to the third invention is the inspection opening according to the first or second invention, wherein the outer frame extends over the entire circumference of the inner frame closed with respect to the outer frame. It is a structure that covers from the back side.

According to the inspection opening, it is locked by engagement between the engaging member and the locking leaf spring, and unlocked by bending deformation of the locking leaf spring, so that the locking device can be a simple mechanism. In addition, since it is necessary to resist the reaction force when bending the locking leaf spring, even if the locking leaf spring should be reached by hand, it is not easy to unlock the door.

Fig. 2 is a perspective view of the ceiling inspection door according to Embodiment 1 of the present invention, viewed from the inside of the room, with the inner frame and cover plate closed; It is the perspective view seen from the indoor side in the state where the inner frame and lid plate of the ceiling inspection door are opened. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1; It is an enlarged cross-sectional perspective view of the outer frame and locking leaf spring of the same ceiling inspection door. It is the enlarged view which looked at the vicinity of the notch in which an unlocking tool can be inserted in an outer frame and an inner frame from the indoor side. FIG. 4 is a cross-sectional view taken along line AA of FIG. 3 showing a state in which the unlocking tool is inserted into the notch; FIG. 4 is a cross-sectional view taken along line AA showing a state in which the unlocking tool inserted into the notch is received by the receiving portion; FIG. 4 is a cross-sectional view taken along line AA showing an unlocked state by operating an unlocking tool; FIG. 4 is a cross-sectional view taken along line AA showing a state in which the inner frame and the cover plate are closed from the opened state; FIG. 10 is a cross-sectional view along AA showing a state further closed from FIG. 9; FIG. 11 is a cross-sectional view along AA showing a completely closed state further closed from FIG. 10; FIG. 9 is a cross-sectional view taken along line AA showing a state in which an unlocking tool is inserted into a notch of the ceiling inspection door according to Embodiment 2 of the present invention; FIG. 4 is a cross-sectional view taken along line AA showing a state in which the unlocking tool inserted into the notch is received by the receiving portion; FIG. 4 is a cross-sectional view taken along line AA showing an unlocked state by operating an unlocking tool; FIG. 10 is a cross-sectional view of the ceiling inspection door according to Embodiment 3 of the present invention, taken along the line AA.

An inspection opening according to an embodiment of the present invention will be described below. This inspection opening is applicable to various inspection openings such as a ceiling inspection opening provided in the ceiling, a wall inspection opening provided in the wall, and a floor inspection opening provided in the floor. As an example of such an inspection opening, a ceiling inspection opening will be described below.
[Embodiment 1]

As shown in FIGS. 1 and 2, this ceiling inspection opening 1 includes an outer frame 2 arranged on the inner peripheral edge of an opening O (see FIG. 2) formed in the ceiling C, and an outer frame 2 inside the outer frame 2. An inner frame 3 arranged to be openable and closable is provided. A cover plate 4 is arranged inside the inner frame 3 as necessary. FIG. 1 shows a state in which the inner frame 3 and the cover plate 4 are closed with respect to the outer frame 2, and FIG. front side).

The ceiling inspection door 1 is provided with a locking device capable of maintaining the closed state of the inner frame 3 and cover plate 4 with respect to the outer frame 2 . This locking device will be mainly described below.

As shown in FIG. 3, the ceiling inspection door 1 is provided with an engaging member 5 provided on the inner frame 3 and engaged with the engaging member 5 provided on the outer frame 2 as a locking device. and a locking leaf spring 6 for preventing the inner frame 3 from opening with respect to the outer frame 2.

The outer frame 2 of the ceiling inspection opening 1 includes an outer frame outer flange 22 and an outer frame inner flange 23, which are peripheral members exposed to the interior of the room, and the outer frame outer flange 22 and the outer frame outer flange 23. an outer frame web 29 rising from the boundary of the inner flange 23; The locking leaf spring 6 is fixed to the outer frame web 29 and arranged on the upper surface of the outer frame inner flange 23 . The inner frame 3 of the ceiling inspection opening 1 includes an inner frame outer flange 32 and an inner frame inner flange 33 which are peripheral members exposed to the indoor side, and the inner frame outer flange 32 and the inner frame inner flange 33 . and an inner frame web 39 rising from the boundary of the inner flange 33 . The engaging member 5 is fixed to the inner frame web 39 and is kept engaged by contacting the locking leaf spring 6 at the contact surface 7 . The contact surface 7 is, for example, substantially perpendicular to the opening direction (vertical direction) of the inner frame 3 with respect to the outer frame 2 . The outer frame outer flange 22 contacts the plate material of the ceiling C, and the inner frame inner flange 33 contacts the cover plate 4 .

As shown in FIGS. 4 and 5, the outer frame inner flange 23 is formed with a notch 24 (one example of a gap) having a size into which an unlocking tool, which will be described later, can be inserted as a locking device. ing. FIG. 4 shows the outer frame 2 and the locking leaf spring 6 provided on the outer frame 2, and the inner frame 3 and the cover plate 4 are omitted. The unlocking tool is, for example, a long piece of metal such as a ruler made of stainless steel.

As shown in FIG. 6 , the locking leaf spring 6 has a receiving portion 66 that receives the unlocking tool R inserted into the notch 24 . As shown in FIGS. 7 and 8, the locking leaf spring 6 is bent and deformed by the operation of the unlocking tool R received by the receiving portion 66, so that the engagement with the engaging member 5 is released. It is a thing. The operation of the unlocking tool R is movement of the receiving portion 66 in the direction along the contact surface 7 .

Here, the structures of the engaging member 5 and the locking leaf spring 6 will be described in detail. As shown in FIG. 3, the engaging member 5 includes a member attachment portion 59 attached to the outer surface of the inner frame web 39 with a screw or the like 35, and the contact surface 7 protruding toward the outer frame web 29. and a projection 57 forming a . As shown in FIGS. 3 and 4, the locking leaf spring 6 is arranged on an attachment portion 69 attached to the inner surface of the outer frame web 29 with a screw or the like 26 and on the upper surface of the outer frame inner flange 23. An elastic portion 63 that generates an elastic force, a guide portion 64 that extends toward the protruding portion 57 (contact surface 7) of the engaging member 5 and guides the unlocking tool R, and from this guide portion 64, an inner frame inner It has the receiving portion 66 projecting toward the flange 33 or the inner frame outer flange 32 , and the engaging portion 67 contacting the projecting portion 57 of the engaging member 5 with the contact surface 7 . The locking leaf spring 6 is manufactured, for example, by bending a piece of metal so that the attachment portion 69, the elastic portion 63, the guide portion 64, the receiving portion 66 and the engaging portion 67 are formed.

In addition, the ceiling inspection opening 1 is configured so that the locking leaf spring 6 cannot be touched by hand from the back side of the ceiling (back side of the opening O). Specifically, as shown in FIG. 3, the outer frame 2 has a sealing frame portion 28 projecting inward from the end portion of the outer frame web 29 on the back side of the ceiling. The ceiling inspection opening 1 has an airtight member 8 arranged between the sealing frame portion 28 and the end portion of the inner frame web 39 on the back side of the ceiling. That is, the inner frame 3 and the outer frame 2 are in contact with each other through the airtight material 8 over the entire circumference. In addition, the inner frame 3 and the outer frame 2 do not necessarily have to be in direct or indirect contact over the entire circumference. It is sufficient that the frame 2 (sealing frame portion 28) covers from the back side of the ceiling.

The operation of the ceiling inspection opening 1 will be described below.

First, in a state where the inner frame 3 and the cover plate 4 are closed with respect to the outer frame 2 as shown in FIG. 1, the unlocking tool R is inserted into the notch 24 as shown in FIG. The unlocking tool R inserted into the notch 24 is guided by the guide portion 64 of the locking leaf spring 6 and reaches the receiving portion 66 . Then, as shown in FIG. 7, when the unlocking tool R is received by the receiving portion 66, by horizontally moving the end of the unlocking tool R on the indoor side from the outer frame 2 side to the inner frame 3 side, As shown in FIG. 8, the receiving portion 66 moves in the direction along the contact surface 7 between the engaging member 5 and the locking leaf spring 6 (from the inner frame 3 side to the outer frame 2 side). As a result, the engagement between the engaging member 5 and the locking leaf spring 6 is released, and the inner frame 3 and the cover plate 4 are opened with respect to the outer frame 2 by gravity, as shown in FIG.

Further, since the sealing frame portion 28 of the outer frame 2 and the inner frame web 39 of the inner frame 3 are in contact with each other through the airtight material 8, the locking leaf spring 6 cannot be reached from the back side of the ceiling. That is, since the outer frame 2 (sealing frame portion 28) covers the entire circumference of the inner frame 3 (inner frame web 39) closed with respect to the outer frame 2 from the back side of the ceiling, The locking leaf spring 6 is out of reach. If, instead of such a structure, the locking leaf spring 6 could be reached from behind the ceiling, it would be necessary to resist the reaction force of the locking leaf spring 6 in order to move the locking leaf spring 6 until the lock is unlocked. There is This reaction force consists of the elastic force of the locking leaf spring 6, which is an elastic body, and the inner frame 3 (including members such as the lid plate 4 fixed to the inner frame 3) that the locking leaf spring 6 receives. weight and

Thus, according to the ceiling inspection door 1, it is locked by the engagement of the engaging member 5 and the locking leaf spring 6, and is unlocked by bending deformation of the locking leaf spring 6, so that the locking device can be a simple mechanism. can be In addition, since it is necessary to resist the reaction force in bending the locking leaf spring 6, even if the locking leaf spring 6 is reached from the back side of the ceiling, it is not easy to unlock it, so the security is improved. can be done.

Further, in order to unlock the ceiling inspection door 1, it is necessary not only to insert the unlocking tool R into the notch 24 but also to move the receiving part 66 along the contact surface 7. By complicating the operation for , the security can be further improved.

Furthermore, since the locking leaf spring 6 cannot be reached from the back side of the ceiling due to the structure in which the outer frame 2 covers the entire circumference of the inner frame 3 from the back side of the ceiling, the inner frame 3 can be opened from the back side of the ceiling with respect to the outer frame 2. is impossible, and the security can be further improved.

By the way, in order to close the inner frame 3 and the lid plate 4 with respect to the outer frame 2, the unlocking tool R or the like is not required, and the inner frame 3 and the lid are simply turned toward the outer frame 2 (toward the back side of the ceiling). It is enough to push the plate 4. Specifically, as shown in FIGS. 9 and 10, when the inner frame 3 and the lid plate 4 are pushed toward the back side of the ceiling, the projecting portion 57 of the engaging member 5 is guided by the guide portion 64 of the locking leaf spring 6. Move to the back of the ceiling while being. When the projecting portion 57 moves to the back side of the ceiling from the engaging portion 67, the engaging portion 67 moves toward the engaging member 5 due to the elastic force of the locking leaf spring 6, as shown in FIG. , the engaging portion 67 and the protruding portion 57 come into contact with each other at the contact surface 7, and are automatically locked.
[Embodiment 2]

A ceiling inspection opening 1 according to Embodiment 2 of the present invention will be described below. In the ceiling inspection door 1 according to Embodiment 1, the contact surface 7 formed by the engagement between the engaging member 5 and the locking leaf spring 6 is substantially perpendicular to the opening direction of the inner frame 3 with respect to the outer frame 2. However, in the ceiling inspection door 1 according to the second embodiment, the contact surface 7 is inclined with respect to the direction in which the inner frame 3 opens with respect to the outer frame 2 . Hereinafter, the contact surface 7, which is different from the first embodiment, will be described, and the same reference numerals will be given to the same components as in the first embodiment, and the description thereof will be omitted.

As shown in FIG. 12, in the ceiling inspection door 1 according to Embodiment 2, the contact surface 7 between the engaging member 5 and the locking leaf spring 6 is inclined toward the back of the ceiling toward the outside. With this configuration, when the unlocking tool R is inserted into the notch 24, the unlocking tool R is guided by the guide portion 64 of the locking leaf spring 6 and unlocked by the receiving portion 66 as shown in FIG. Tool R can be received. Then, as shown in FIG. 14, further insertion of the unlocking tool R causes the engagement member 5 and the locking leaf spring 6 to slide on the contact surface 7, thereby releasing the engagement.

Thus, according to the ceiling inspection door 1 according to the second embodiment, in addition to the effects of the first embodiment, the contact surface 7 is positioned substantially perpendicular to the opening direction of the inner frame 3 with respect to the outer frame 2. Since it is not necessary to make the locking device a simpler mechanism.
[Embodiment 3]

A ceiling inspection opening 1 according to Embodiment 3 of the present invention will be described below. In the ceiling inspection opening 1 according to Embodiments 1 and 2, the engaging member 5 is provided on the inner frame 3 and the locking leaf spring 6 is provided on the outer frame 2. The inspection opening 1 has an engaging member 5 provided on the outer frame 2 and a locking leaf spring 6 provided on the inner frame 3 . The following description will focus on the engaging member 5 and the locking leaf spring 6, which are different from the first and second embodiments, and the same reference numerals will be used for the same configurations as in the first and second embodiments. and the description thereof is omitted.

As shown in FIG. 15, the engaging member 5 of the ceiling inspection door 1 according to the third embodiment includes a member attachment portion 59 attached to the inner surface of the outer frame web 29 with a screw or the like 25, and an inner frame and a projection 57 projecting towards the web 39 and forming said contact surface 7 . The locking leaf spring 6 of the ceiling inspection door 1 according to Embodiment 3 is attached to the outer surface of the inner frame web 39 with a screw or the like 36 and is attached to an elastic mounting portion 60 that generates an elastic force. A guide portion 64 that extends toward the sealing frame portion 28 and guides the unlocking tool R, and the receiving portion that protrudes from the guide portion 64 toward the outer frame inner flange 23 or the outer frame outer flange 22. 66 and an engaging portion 67 that contacts the projecting portion 57 of the engaging member 5 .

The engaging member 5 of the ceiling inspection door 1 is located on the interior side of the locking leaf spring 6 at the contact surface 7 with the locking leaf spring 6 . With this configuration, although not shown, when the unlocking tool R is inserted into the notch 24, the unlocking tool R is guided by the guide portion 64 of the locking leaf spring 6, and the unlocking tool R is supported by the receiving portion 66. I can receive it. Then, by moving the end of the unlocking tool R on the indoor side in the horizontal direction from the inner frame 3 side to the outer frame 2 side, the direction along the contact surface 7 between the engaging member 5 and the locking leaf spring 6 (outer The receiving portion 66 moves from the frame 2 side to the inner frame 3 side). As a result, the engagement between the engaging member 5 and the locking leaf spring 6 is released.

Thus, according to the ceiling inspection door 1 according to the third embodiment, the same effects as those of the first embodiment can be obtained.

By the way, in Embodiments 1 to 3, the notch 24 of the outer frame 2 (specifically, the inner flange 23 for the outer frame) has been described as the gap into which the unlocking tool R can be inserted, but it is not limited to this. However, it is sufficient that the gap between the inner frame 3 and the outer frame 2 is a space into which the unlocking tool R can be inserted.

Further, in the first to third embodiments, specific shapes of the locking leaf spring 6 have been described and illustrated, but these are merely examples. The locking leaf spring 6 is provided on the outer frame 2/inner frame 3 and engages with the engaging member 5 to prevent the inner frame 3 from opening with respect to the outer frame 2, and is inserted into the gap. If it has a receiving portion 66 for receiving the unlocking tool R, and is bent and deformed by the operation of the unlocking tool R received by the receiving part 66, the engagement with the engaging member 5 is released. Just do it.

Further, as the engaging member 5, in the first and second embodiments, it was explained that it was provided on the inner frame 3, and in the third embodiment, it was explained that it was provided on the outer frame 2, but the engaging member 5 is not limited to a member different from the inner frame 3/outer frame 2, and may be a member integrated with the inner frame 3/outer frame 2. FIG. Even when the engaging member 5 is a member integrated with the inner frame 3 /outer frame 2 , it is said that the engaging member 5 is provided in the inner frame 3 /outer frame 2 .

In addition, although the airtight material 8 has been described in the first to third embodiments, the airtight material 8 does not necessarily require airtightness (sealing against gas) between the inner frame 3 and the outer frame 2. It may function as a cushioning material for the inner frame 3 against the outer frame 2 although it is not airtight.

Further, in Embodiments 1 to 3, as an example of a structure in which the outer frame 2 covers the entire circumference of the inner frame 3 from the back side of the ceiling, the sealing frame portion 28 covers the entire circumference of the inner frame web 39. Although the structure covering from the back side of the ceiling has been described, it is not limited to this. For example, if it is a structure in which the members forming the outer frame 2 or the members attached to the outer frame 2 are covered from the back side of the ceiling over the entire circumference of the members forming the inner frame 3 or the members attached to the inner frame 3 good.

Moreover, the first to third embodiments are illustrative in all respects and are not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims. Of the configurations described in the above embodiments, the configuration other than the configuration described as the first invention in "Means for Solving the Problems" is an arbitrary configuration, and can be deleted and changed as appropriate.

C Ceiling O Opening R Unlocking Tool 1 Ceiling Inspection Door 2 Outer Frame 3 Inner Frame 4 Lid Plate 5 Engaging Member 6 Locking Leaf Spring 7 Contact Surface 8 Airtight Material 22 Outer Flange for Outer Frame 23 Inner Flange for Outer Frame 24 Notch 29 Outer frame web 28 Sealing frame portion 32 Inner frame outer flange 33 Inner frame inner flange 39 Inner frame web 57 Protruding portion 59 Member mounting portion 63 Elastic portion 64 Guide portion 66 Receiving portion 67 Engagement Joining portion 69 Mounting portion

Claims (3)

an outer frame arranged on the inner peripheral edge of the opening;
an inner frame that is openable and closable inside the outer frame;
an engaging member provided on the inner frame ;
a locking leaf spring provided on the outer frame and engaged with the engaging member to prevent the inner frame from opening with respect to the outer frame;
a gap formed between the inner frame and the outer frame into which an unlocking tool can be inserted;
The locking leaf spring has a receiving portion for receiving the unlocking tool inserted into the gap,
The locking leaf spring is bent and deformed by the operation of the unlocking tool received by the receiving portion, thereby releasing the engagement with the engaging member,
a contact surface due to engagement between the engaging member and the locking leaf spring is substantially perpendicular to a direction in which the inner frame opens with respect to the outer frame;
The inspection door, wherein the operation of the unlocking tool for releasing the engagement between the engaging member and the locking leaf spring is movement of the receiving portion in the direction along the contact surface. an outer frame arranged on the inner peripheral edge of the opening;
an inner frame that is openable and closable inside the outer frame;
an engaging member provided on the inner frame ;
a locking leaf spring provided on the outer frame and engaged with the engaging member to prevent the inner frame from opening with respect to the outer frame;
a gap formed between the inner frame and the outer frame into which an unlocking tool can be inserted;
The locking leaf spring has a receiving portion for receiving the unlocking tool inserted into the gap,
The locking leaf spring is bent and deformed by the operation of the unlocking tool received by the receiving portion, thereby releasing the engagement with the engaging member,
a contact surface due to engagement between the engaging member and the locking leaf spring is inclined with respect to a direction in which the inner frame opens with respect to the outer frame;
The inspection door, wherein the operation of the unlocking tool for releasing the engagement between the engaging member and the locking leaf spring is further insertion of the unlocking tool received by the receiving portion. 3. The inspection opening according to claim 1, wherein the outer frame covers the opening from the inner side over the entire circumference of the inner frame closed with respect to the outer frame.

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