JP7133439B2 - Aperture frame structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to an opening frame structure including a frame member attached to the periphery of an opening formed in a plate that partitions an indoor space from an outdoor space, and a fixture that fixes the frame member to the plate.

Conventionally, there has been known an inspection door apparatus to which the opening frame structure as described above is applied. 2. Description of the Related Art An inspection door device is provided on a board (wall material, ceiling material, floor material, etc.) of a building such as a house, and is used to access the space behind the board (outdoor space).

As an example of the above-described inspection door apparatus, Patent Document 1 below discloses a rectangular frame-shaped frame member (inspection door frame) attached to the periphery of a rectangular opening formed in a ceiling material, and a frame member detachably attached to the frame member. A lid member (lid) is disclosed. At the time of inspection, that is, when examining the state of various pipes existing in the ceiling space, the presence or absence of rain leakage, etc., the cover member is removed to open the opening, and the ceiling space is accessed through the opening.

JP 2008-291592 A

Here, in the inspection door device disclosed in Patent Document 1, on the ceiling material (wooden or light metal frame material for attaching the ceiling material) as a base material arranged on the back surface (upper surface) of the ceiling material, The frame member is fixed by screwing.

However, in the method of Patent Document 1, in which the frame member is screwed to the ceiling joist, when it becomes necessary to remove the inspection door device together with the frame member for some reason such as renovation, the frame member and the ceiling joist are screwed together. You have to remove all the screws holding it in place. Moreover, even if the frame member is to be fixed to the ceiling joist again, it is necessary to attach the screws to positions different from the positions where the screws were originally attached (old screwing positions). In this case, the screw hole remains at the old screwing position, which is not preferable in terms of appearance and strength, and since the position where the new screw can be screwed is limited, there is a problem that workability tends to deteriorate. be.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an opening frame structure in which a frame member can be easily attached to and detached from a plate member.

In order to solve the above-described problems, the present invention provides an opening frame comprising a frame member attached to an opening formed in a plate material that partitions an indoor space and an outdoor space, and a fixture for fixing the frame member to the plate material. In the structure, the frame member includes a cylindrical peripheral wall portion formed along the peripheral edge of the opening, and a cylindrical peripheral wall portion that protrudes from the end portion of the peripheral wall portion on the interior side to the side opposite to the center of the opening and along the surface of the plate member. The peripheral wall portion has an insertion hole penetrating the peripheral wall portion in the thickness direction at a position on the exterior side of the rear surface of the plate member, and the fixture includes the peripheral wall portion. and a projecting portion projecting from the base portion toward the center of the opening and inserted into the insertion hole, wherein the projecting portion is located further away from the opening than the peripheral wall portion. The base portion is formed so as to elastically press the back surface of the plate material at a position on the center side, and the base portion includes a base portion main body arranged along the inner surface of the peripheral wall portion, and a base portion main body positioned on the exterior side of the base portion main body. Further, it has a hook portion having a shape such that a gap is formed between it and the inner surface of the peripheral wall portion (Claim 1).

According to the present invention, the frame member can be fixed to the plate member by a simple operation of inserting the projecting portion of the fixture into the insertion hole from the inner side (opening center side) of the frame member. That is, when the projecting portion is inserted into the insertion hole, the projecting portion is elastically pressed against the rear surface of the plate at a position outside the peripheral wall portion of the frame member (opposite to the center of the opening). As a result, the plate member can be sandwiched between the flange portion and the projecting portion of the frame member, and the frame member can be fixed to the plate member by this sandwiching.

Further, a hook is formed at the end of the base portion located inside the peripheral wall on the outdoor side, and a gap is formed between the hook and the inner surface of the peripheral wall when the fixture is inserted. Therefore, when removing the frame member from the plate (pulling it out from the opening), the worker can easily put his/her hand on the hook portion spaced apart from the inner surface of the peripheral wall portion and pull it toward the center side of the opening and the inside of the room. can be pulled to As a result, it is possible to easily release the attachment of the fixture, so that it is possible to effectively improve the working efficiency of the work of removing the frame member.

Preferably, the projecting portion includes an extending portion that extends from the base portion through the insertion hole to a side opposite to the center of the opening from the peripheral wall portion, and a tip of the extending portion that is folded back toward the center of the opening and extends toward the center of the opening. a folded portion formed so as to approach the back surface of the plate material, and the tip of the folded portion reaches the back surface of the plate material in a state in which the intersection angle between the folded portion and the extended portion is elastically reduced. It is formed so as to abut against it (Claim 2).

According to this configuration, it is possible to properly release the fixation of the frame member by the fixture according to the operation on the hook. That is, the operator puts his/her hand on the hook and pulls it toward the center of the opening, thereby extracting the extended portion of the projecting portion from the insertion hole and pulling the folded portion toward the center of the opening so that it touches the outer surface of the peripheral wall portion. It can be displaced to a state that follows. As a result, it is possible to properly release the pressing of the plate material by the folded portion (fixation of the frame member by the fixture), and the frame member can be removed from the plate material.

Preferably, the hook is formed so as to continuously extend from the outdoor-side end of the base main body while being inclined toward the outdoor side and the opening center side (Claim 3).

According to this configuration, the gap generated between the hook and the inner surface of the peripheral wall expands toward the outside of the room, so that when releasing the attachment of the fixture, it is easier to put the hook on the hook and release it. It can be pulled toward the center of the opening and toward the interior of the room.

As described above, according to the opening frame structure of the present invention, the frame member can be easily attached to and detached from the plate member.

1 is a cross-sectional view showing the overall configuration of an inspection door device according to an embodiment of the present invention; FIG. FIG. 3 is a perspective view showing a frame member of the inspection door device alone; It is a sectional view showing the above-mentioned frame member alone. FIG. 3 is a perspective view showing a cover member of the inspection hatch device alone; It is a perspective view which shows the fixture of the said inspection door apparatus alone. It is a side view which shows the said fixing tool alone. FIG. 10 is a diagram for explaining the procedure for attaching the inspection door device, and is a cross-sectional view showing a state in which the frame member is inserted into the opening; FIG. 8 is a cross-sectional view showing a situation after FIG. 7 when inserting the fixture into the insertion hole of the frame member; FIG. 9 is a cross-sectional view showing a situation after FIG. 8 when the lid member is attached to the frame member; FIG. 10 is a diagram for explaining the procedure for releasing the attachment of the fixture, and is an enlarged cross-sectional view showing an initial state before the attachment is released; FIG. 11 is an enlarged cross-sectional view after FIG. 10 showing a state in the middle of inserting and releasing the fixture; FIG. 12 is an enlarged cross-sectional view after FIG. 11 showing the state when the insertion and release of the fixture is completed;

(1) Configuration of Inspection Door Device FIG. 1 is a sectional view showing the overall configuration of an inspection door device 1 according to an embodiment of the present invention. The inspection port device 1 shown in this figure is applied to a wall material W that partitions an indoor space X and an outdoor space Y. As shown in FIG. The wall material W is one of the plate materials that define the four side surfaces of the indoor space X, and is formed so as to extend vertically from the ceiling to the floor (the upper side in FIG. 1 is the ceiling side, and the lower side is the floor side). The inspection door device 1 includes a frame member 2 attached to a rectangular opening C formed in a wall material W, a plurality of fixtures 3 for fixing the frame member 2 to the wall material W, and opening and closing the opening C. A lid member 4 detachably attached to the frame member 2 is provided. In the following description, of the direction perpendicular to the wall material W (the direction parallel to the thickness direction of the wall material W), the side facing the indoor space X will be referred to as the "indoor side", and the side facing the outdoor space Y will be referred to as the "outdoor side". called.

2 and 3 are a perspective view and a sectional view showing the frame member 2 alone. As shown in FIGS. 2, 3, and 1, the frame member 2 is formed in a rectangular tube shape that is one size smaller than the periphery of the opening C of the wall member W so as to follow the periphery of the opening C. and a rectangular frame-shaped flange portion 12 projecting from the end portion of the peripheral wall portion 11 on the indoor side. In the following description, the direction perpendicular to the peripheral wall portion 11 (the direction parallel to the thickness direction of the peripheral wall portion 11) toward the center of the opening C will be referred to as the “opening center side,” and the side away from the center of the opening C will be referred to as the “reverse direction.” It is called "opening center side".

A plurality of insertion holes 15 are formed in the peripheral wall portion 11 so as to penetrate the peripheral wall portion 11 in the thickness direction. In this embodiment, one or two insertion holes 15 are formed in each of the four sides of the rectangular tube that constitutes the peripheral wall portion 11 . More specifically, one insertion hole 15 is formed in each of the walls of the two opposing sides, and two insertion holes 15 are formed in the walls of the other two sides of the other opposing sides. Two insertion holes 15 are formed in the peripheral wall portion 11 . In this embodiment, as shown in FIG. 1, two side wall portions having one insertion hole 15 are arranged at the left and right edges of the opening C (in other words, two insertion holes 15 are provided). The frame member 2 is attached in such a posture that the walls of the other two sides are arranged at the upper and lower edges of the opening C).

Each insertion hole 15 is formed at a position on the exterior side of the peripheral wall portion 11 relative to the back surface of the wall material W (surface on the exterior side). Each insertion hole 15 is a hole for inserting the fixture 3 (protruding portion 32 to be described later), and is formed in a rectangular shape. When the frame member 2 is fixed to the wall material W, the peripheral wall part 11 is attached to the opening C of the wall material W as shown in FIG. The fixture 3 is inserted into each insertion hole 15 of 11 from the inner side (opening center side).

A plurality of fitting holes 16 are provided in a portion of the peripheral wall portion 11 slightly closer to the interior side (closer to the flange portion 12 ) than the insertion hole 15 . This fitting hole 16 is a hole used for fixing the lid member 4 (details will be described later). In this embodiment, a total of eight fitting holes 16 are formed in the peripheral wall portion 11 by forming two fitting holes 16 in each of the four sides of the rectangular tube shape forming the peripheral wall portion 11 . .

The flange portion 12 is formed so as to protrude from the interior-side end portion of the peripheral wall portion 11 along the surface (interior-side surface) of the wall material W toward the side opposite to the center of the opening. In the state where the frame member 2 is fixed to the wall material W using the fixture 3 (FIG. 1), the flange 12 abuts on the surface of the wall material W, so that there is a gap between the flange 12 and the fixture 3. The wall material W is sandwiched.

FIG. 4 is a perspective view showing the lid member 4 alone. As shown in FIG. 4 and FIG. 1, the lid member 4 has a rectangular plate-shaped lid body 21 and a plurality of fitting projections 22 projecting from the surface of the lid body 21 on the outdoor side. is doing.

The lid body 21 is formed to have a size that substantially coincides with the outer circumference of the flange portion 12 of the frame member 2 . In the state where the lid member 4 is attached to the frame member 2 (FIG. 1), the lid body 21 is arranged so as to abut against the flange portion 12 from the inside of the room and close the opening C of the wall material W. As shown in FIG.

The fitting protrusions 22 are arranged in a rectangular shape in plan view corresponding to the shape of the peripheral wall portion 11 of the frame member 2 . Each of the fitting protrusions 22 is formed in each fitting hole 16 so that it can be fitted into a plurality of (eight in this embodiment) fitting holes 16 in the peripheral wall part 11 from the inner side (opening center side) of the peripheral wall part 11 . are respectively provided at positions corresponding to the .

Each fitting projection 22 has a claw portion 22a projecting toward the center side of the opening at the end portion on the outside of the room. When the cover member 4 is attached to the frame member 2 ( FIG. 1 ), the cover member 4 is fixed to the frame member 2 by fitting the claw portions 22 a into the plurality of fitting holes 16 .

5 and 6 are a perspective view and a side view showing the fixture 3 alone. In the side view of FIG. 6, the wall member W and the frame member 2 are shown by imaginary lines together with the fixture 3 for convenience, but the shape of the fixture 3 is in the state (natural state) before being elastically deformed. shall be As shown in FIGS. 5 and 6 and FIG. 1, the fixture 3 includes a base portion 31 arranged along the inner surface (the surface on the center side of the opening) of the peripheral wall portion 11 of the frame member 2, and a base portion 31. and a protruding portion 32 protruding from the portion 31 toward the center side of the opening. The projecting portion 32 is a portion to be inserted into the insertion hole 15 of the peripheral wall portion 11 , and is formed to extend through the insertion hole 15 from the peripheral wall portion 11 to the center side opposite to the opening.

The fixture 3 is configured by an integrally molded product made of synthetic resin. Specifically, as the material of the fixture 3, a synthetic resin having relatively excellent slidability is suitable, and for example, polyacetal resin (POM) and polyolefin resin can be suitably used. In the fixture 3 having such a structure, when the projection 32 is inserted into the insertion hole 15, the projection 32 is elastically deformed and comes into contact with the wall material W, thereby removing the wall material W. Press into the room.

The shape of the fixture 3 will be described in more detail. The base portion 31 includes a flat plate-like base portion main body 31a formed in a flat plate shape along the inner surface of the peripheral wall portion 11, and a base portion main body 31a continuously inclined toward the outdoor side and the opening center side from the outdoor side end of the base portion main body 31a. It has a hook portion 31b that extends while When the fixture 3 is inserted, the base body 31a is in surface contact with the inner surface of the peripheral wall 11 (that is, basically no gap is formed between the base body 31a and the peripheral wall 11). placed. On the other hand, the hook portion 31b extending from the end portion of the base portion main body 31a toward the outside of the room and toward the center of the opening does not contact the inner surface of the peripheral wall portion 11, and a gap is formed between the hook portion 31b and the inner surface of the peripheral wall portion 11. It is formed. This gap is larger on the outdoor side than on the indoor side. In other words, the hook portion 31b is formed so as to be spaced apart from the inner surface of the peripheral wall portion 11 (so that the gap with the peripheral wall portion 11 is enlarged) toward the outdoor side.

As shown in FIG. 6, if the inclination angle of the hook portion 31b with respect to the base portion main body 31a, in other words, the inclination angle of the hook portion 31b with respect to a plane (here, a horizontal plane) parallel to the inner surface of the peripheral wall portion 11 is θ1, this inclination angle θ1 is set within the range of 5 to 60°.

Further, the tip of the hook portion 31b is positioned further outside than the most outdoor portion of the projecting portion 32 (connecting portion between the stepped portion 41b of the recessed stepped portion 41 and the extended portion main body 42, which will be described later). is formed in

The projecting portion 32 has an extension portion 33 extending from the base portion 31 toward the center of the opening, and a folded portion 34 that is folded back from the tip of the extension portion 33 toward the center of the opening.

The extending portion 33 includes a recessed stepped portion 41 that continues to a connecting portion between the base portion main body 31a and the hook portion 31b in the base portion 31 (in other words, the end portion of the base portion main body 31a on the outdoor side), and a recessed stepped portion 41 extending backward from the recessed stepped portion 41. It has an extended portion main body 42 that extends toward the center of the opening and continues to the folded portion 34 . The folded portion 34 is inclined so as to come closer to the rear surface of the wall material W as it moves away from the tip of the extended portion main body 42 (towards the center of the opening). The extended portion main body 42 and the folded portion 34 are formed to extend straight in different directions, and the outer surfaces thereof are smooth surfaces without steps.

As shown in FIG. 6, in the state before the protrusion 32 is elastically deformed as the fixture 3 is inserted, that is, in the natural state of the fixture 3, the extension 33 (extension main body 42) and the folded part 34 is set within a range of 20 to 60°.

The recessed stepped portion 41 is formed so as to be recessed one step toward the interior side of the extension portion main body 42 , and is arranged inside the insertion hole 15 when the fixture 3 is inserted. As shown in FIG. 10 , if the portion of the periphery of the insertion hole 15 that defines the side of the insertion hole 15 on the outdoor side is defined as an outdoor side edge A1, the recessed stepped portion 41 is the outdoor side edge of the insertion hole 15 . It has a concave shape capable of receiving the portion A1. Specifically, the recessed stepped portion 41 extends from the connection portion between the base portion main body 31 a and the hook portion 31 b (the end portion of the base portion main body 31 a on the outdoor side) toward the center side opposite to the opening, and the outdoor side edge portion of the insertion hole 15 . It has a bottom surface portion 41a that is close to and faces A1, and a stepped portion 41b that extends from the end of the bottom surface portion 41a on the opposite side of the center of the opening to the outside of the room and continues to the extended portion main body .

As shown in FIG. 10, the insertion hole 15 in this embodiment is a stepped hole having a main hole portion 15a and a countersunk hole portion 15b. The main hole portion 15a is formed on the inner surface side (opening center side) of the peripheral wall portion 11, and the countersunk hole portion 15b is formed on the outer surface side of the peripheral wall portion 11 (opposite to the opening center side). The main hole portion 15a is a slightly tapered hole whose opening area gradually decreases toward the inner surface of the peripheral wall portion 11 . The counterbore portion 15b is a hole that is one size larger and shallower than the main hole portion 15a. The recessed stepped portion 41 is formed along the stepped insertion hole 15 . That is, the recessed stepped portion 41 is arranged so that its bottom portion 41a approaches and faces the outdoor side edge of the main hole portion 15a, and its stepped portion 41b approaches and faces the outdoor side edge of the counterbore portion 15b. is formed in

As shown in FIG. 8, the fixture 3 as described above is inserted into the insertion hole 15 of the peripheral wall 11 from the inner side (opening center side) in order to fix the frame member 2 to the wall material W. As shown in FIG. When the fixture 3 is inserted into the insertion hole 15 , the protruding portion 32 protrudes to the outside of the peripheral wall portion 11 , while the base portion 31 remains inside the peripheral wall portion 11 and arranged along the inner surface of the peripheral wall portion 11 . . In addition, when the fixture 3 is inserted, the crossing angle between the extended portion 33 and the folded portion 34 of the projecting portion 32 is smaller than before the insertion (in the natural state), and the wall material W is elastically deformed in the thickness direction. Then, due to the elastic force of the protruding portion 32 that accompanies this, the indoor-side end of the folded portion 34 is pressed against the back surface of the wall material W (periphery of the opening C), and the wall material W is pressed indoors. be. In other words, the wall material W is sandwiched between the flange portion 12 of the frame member 2 and the projecting portion 32 (fixture 3). The frame member 2 is fixed so as not to move within the opening C of the wall material W by the clamping action of the fixture 3 .

In addition, in the state where the fixture 3 is inserted into the insertion hole 15 as described above (insertion state of the fixture 3), the recessed stepped portion 41 of the projecting portion 32 is positioned in the chamber of the insertion hole 15 as shown in FIG. It is arranged at a position close to and facing the outer edge A1. In other words, the fixture 3 is arranged at a position such that the outdoor side edge A1 of the insertion hole 15 fits between the stepped portion 41b of the recessed stepped portion 41 and the hook portion 31b of the base portion 31 in the inserted state. be done.

As shown in FIG. 6 , in the state before the protrusion 32 is elastically deformed as the fixture 3 is inserted, that is, in the natural state of the fixture 3 , the extension main body 42 of the protrusion 32 is formed into the recessed step 41 . It is inclined so that the further away from the end (stepped portion 41b) on the side opposite to the center of the opening, the more it is located on the indoor side. Assuming that the angle of inclination, that is, the angle of inclination of the extension main body 42 with respect to the plane perpendicular to the peripheral wall 11 (here, the vertical plane) is θ2, the angle of inclination θ2 is set within the range of 2 to 15°. .

(2) Installation Procedure of Inspection Door Device Next, a procedure for installing the inspection door device 1 configured as described above to the wall material W will be described with reference to FIGS. 7 to 9. FIG. As a premise for mounting the inspection port device 1 , it is assumed that the wall material W is preliminarily formed with a rectangular opening C that is slightly larger than the peripheral wall portion 11 of the frame member 2 .

To attach the inspection door device 1, first, the frame member 2 is attached to the opening C of the wall material W as shown in FIG. That is, the frame member 2 is brought closer to the opening C from the inside of the room, and the peripheral wall portion 11 is inserted into the opening C until the flange portion 12 contacts the surface of the wall material W (the inner surface of the peripheral portion of the opening C). .

Next, while holding the frame member 2 inserted into the opening C by manually pressing the flange portion 12 from the inside of the room, as shown in FIG. side). Since the insertion holes 15 are formed at six locations in the peripheral wall portion 11 in the circumferential direction (see FIG. 2), a total of six fasteners 3 are prepared, and each fastener 3 is sequentially inserted into the insertion hole 15. be.

When inserting the fixture 3, it is inserted into the insertion hole 15 with the protruding portion 32 facing toward the center side of the opening. At this time, the projecting portion 32 is elastically deformed so as to reduce its angle (intersecting angle θ3 between the extending portion 33 and the folded portion 34 shown in FIG. 6) and is gradually pushed out toward the side opposite to the center of the opening. Finally, the base portion main body 31a of the base portion 31 is pushed out until it comes into contact with the inner surface of the peripheral wall portion 11, and as shown in FIG. , and the tip of the folded portion 34 of the projecting portion 32 is pressed against the rear surface of the wall material W. That is, the wall material W is pressed toward the interior of the room by the elastic force of the elastically deformed projecting portion 32 , and the wall material W is sandwiched between the projecting portion 32 and the flange portion 12 . Thereby, the frame member 2 is fixed within the opening C so as not to move.

Next, as shown in FIG. 9, the lid member 4 is attached to the frame member 2 . Specifically, the lid member 4 is arranged on the indoor side of the frame member 2 in such a manner that the plurality of fitting protrusions 22 are on the outdoor side, and each fitting protrusion 22 is inserted into the peripheral wall portion 11 of the frame member 2. do. This insertion is performed until the rear surface (surface on the outdoor side) of the lid body 21 contacts the flange portion 12 of the frame member 2 . As a result, the claw portions 22a of the fitting projections 22 are fitted into the fitting holes 16 (FIG. 1), and the lid member 4 is fixed to the frame member 2. As shown in FIG.

By the above procedure, the attachment of the inspection door device 1 to the wall material W is completed (see FIG. 1). Although illustration is omitted, packing or the like for sealing may be provided between at least one of the flange portion 12 of the frame member 2 and the wall material W and between the flange portion 12 and the lid body 21. good.

The inspection port device 1 is used to inspect some equipment (for example, various pipes) installed in the outdoor space Y, which is the space behind the wall material W. As shown in FIG. During this inspection, first, the lid member 4 is removed from the frame member 2 and the opening C is opened. The lid member 4 can be removed by simply pulling the lid member 4 toward the interior of the room. As a result, the engagement between the fitting projections 22 of the lid member 4 and the fitting holes 16 of the frame member 2 is released, and the lid member 4 is removed from the frame member 2 . Then, the outdoor space Y is accessed through the opening C opened by removing the lid member 4, and necessary inspections are performed on the facilities such as the above-described piping.

(3) Procedure for Removing Frame Member Next, a procedure for removing the frame member 2 from the wall material W will be described. It is not necessary to remove the frame member 2 at the time of inspection. In this case, the frame member 2 is removed.

In order to remove the frame member 2, the fixture 3 is pulled out from the inside of the frame member 2 in a state where the lid member 4 is removed from the frame member 2, thereby releasing the attachment of the fixture 3. As shown in FIG. Since there are a plurality of fixtures 3 (six in total in this embodiment), the plurality of fixtures 3 are all pulled out by sequentially performing the same operation on these fixtures 3 . As a result, the fixing of the frame member 2 to the wall material W is released, and the frame member 2 can be extracted from the opening C (removed from the wall material W).

10 to 12 are diagrams for explaining the procedure for releasing the attachment of the fixture 3 in order to remove the frame member 2. FIG. In order to release the attachment of the fixture 3, first, as shown in FIG. In other words, it is pulled toward the center of the opening and toward the indoor side. As a result, the extended portion 33 of the protruding portion 32 is pulled toward the inside of the frame member 2 while being in sliding contact with the outer edge A1 of the insertion hole 15, and the extended portion 33 is pulled out from the insertion hole 15 in sequence. .

Here, at the initial stage of the operation for extracting the extension portion 33, the recessed stepped portion 41 of the extension portion 33 contacts and slides against the outer edge portion A1 of the insertion hole 15, and accordingly the projection portion 32 is displaced. The extension portion 33 and the folded portion 34 are elastically deformed so as to slightly reduce the intersection angle (see θ3 in FIG. 6). The extended portion 33 is elastically deformed and slightly moved toward the center of the opening, and then pulled further toward the center of the opening. (that is, a stepped portion formed at the boundary between the main hole portion 15a and the countersunk hole portion 15b). As a result, the extension portion 33 shifts to a state in which the extension portion main body 42 is in sliding contact with the outdoor side edge portion A1 of the insertion hole 15 (see FIG. 11). Since the extension portion main body 42 does not have a step, the extension portion 33 smoothly slides out of the insertion hole 15 . 11, the crossing angle between the extended portion main body 42 and the folded portion 34 increases as the slipping out progresses, and the protruding portion 32 returns to a state (natural state) in which it is not elastically deformed. return.

By further pulling the hooking portion 31b from the state shown in FIG. 11, the folded portion 34 is drawn close to the outer surface of the peripheral wall portion 11 (the surface on the side opposite to the center of the opening), and finally, as shown in FIG. A folded portion 34 is arranged between 11 and the wall material W (surrounding surface of the opening C). As a result, the fixing of the frame member 2 by the fixtures 3 is completely released, and the frame member 2 can be removed from the wall material W (extracted from the opening C).

(4) Effects As described above, in the inspection door device 1 of the present embodiment, the fixture 3 for attaching the frame member 2 to the opening C of the wall material W is provided inside the peripheral wall portion 11 of the frame member 2. A base portion 31 to be arranged and a protruding portion 32 protruding from the base portion 31 through the insertion hole 15 to the outside of the peripheral wall portion 11 are used. The projecting portion 32 includes an extending portion 33 extending from the base portion 31 toward the center of the opening, and a tip of the extending portion 33 folded back toward the center of the opening so as to approach the rear surface of the wall material W toward the center of the opening. and a folded portion 34 formed thereon. The base portion 31 includes a base portion main body 31a arranged along the inner surface of the peripheral wall portion 11, and a hook portion 31b continuously extending from an outdoor-side end portion of the base portion main body 31a while being inclined toward the outdoor side and the opening center side. and With such a configuration, there is an advantage that the frame member 2 can be easily attached to and detached from the wall material W using the fixtures 3 .

That is, in the above-described embodiment, the frame member 2 can be fixed to the wall material W by a simple operation of inserting the projecting portion 32 of the fixture 3 into the insertion hole 15 from the inside of the frame member 2 (opening center side). (See FIG. 8). Specifically, when the projecting portion 32 is inserted into the insertion hole 15 , the folded portion 34 of the projecting portion 32 is elastically inserted into the wall material W at a position outside the peripheral wall portion 11 of the frame member 2 (opposite to the center of the opening). pressed against the back of the Thereby, the wall material W can be sandwiched between the flange portion 12 and the projecting portion 32 of the frame member 2, and the frame member 2 can be fixed to the wall material W by this sandwiching.

On the other hand, when removing the frame member 2 from the wall material W (pulling it out from the opening C), the base portion 31 of the fixture 3 located inside the peripheral wall portion 11 is put on the base portion 31 to move the base portion 31 toward the center of the opening. The fixing of the frame member 2 by the fixture 3 can be released and the frame member 2 can be removed from the wall material W by a simple operation of pulling. That is, by pulling the base portion 31 toward the center of the opening, the operator extracts the extension portion 33 of the projecting portion 32 from the insertion hole 15 while bringing it into sliding contact with the outer edge A1 of the insertion hole 15. 34 can be drawn toward the center of the opening and displaced so as to follow the outer surface of the peripheral wall portion 11 (see FIGS. 10 to 12). As a result, the pressing of the wall material W by the folded portion 34 (fixation of the frame member 2 by the fixture 3) can be released, and the frame member 2 can be removed from the wall material W. FIG.

In particular, in the above-described embodiment, the hook portion 31b is formed at the outdoor-side end portion of the base portion 31, and a gap is formed between the hook portion 31b and the inner surface of the peripheral wall portion 11 when the fixture 3 is inserted. Therefore, when removing the frame member 2 described above, the operator can easily put his/her hand on the hook portion 31b separated from the inner surface of the peripheral wall portion 11 and pull it toward the center of the opening. And it can be pulled indoors. As a result, it is possible to easily release the attachment of the fixing member 3, so that the working efficiency of the work of removing the frame member 2 can be effectively improved.

In the above-described embodiment, the hook portion 31b is formed so as to extend from the outdoor-side end of the base portion body 31a while being inclined toward the outdoor side and the opening center side. The gap generated between the inner surface and the inner surface expands toward the outdoor side. Therefore, when releasing the attachment of the fixture 3, it is possible to more easily put a hand on the hook portion 31b and pull it toward the center of the opening and toward the inside of the room.

In the above-described embodiment, the extension portion 33 includes a recessed stepped portion 41 connected to the outdoor-side end portion of the base portion main body 31a (the connection portion between the base portion main body 31a and the hook portion 31b), and and an extended portion main body 42 extending toward the center side of the opening and connected to the folded portion 34 . The recessed stepped portion 41 is arranged inside the insertion hole 15 and has a shape recessed toward the room side so as to be able to receive the outdoor side edge portion A1 that defines the side of the insertion hole 15 on the outdoor side. there is According to such a configuration, when the fixture 3 is inserted, the outdoor side edge A1 of the insertion hole 15 and the concave stepped portion 41 of the extension portion 33 are engaged with each other. It is possible to prevent the extension portion 33 from coming out of the insertion hole 15 even though the hook portion 31b of the base portion 31 is not pulled. can be stabilized.

In the above-described embodiment, the recessed stepped portion 41 is bent toward the outdoor side from the bottom portion 41a that is adjacent to and faces the outdoor side edge portion A1 of the insertion hole 15, and the end portion of the bottom portion 41a that is opposite to the center side of the opening. and a stepped portion 41 b that continues to the extension portion main body 42 . According to such a configuration, since the outer edge A1 of the insertion hole 15 is sandwiched between the hook portion 31b and the stepped portion 41b of the base portion 31, the extension portion 33 may unexpectedly slip out of the insertion hole 15. can be effectively prevented.

Further, in the above-described embodiment, the hook portion 31b of the base portion 31 is formed so that the tip thereof is located on the outside of the vehicle with respect to the connecting portion between the stepped portion 41b and the extension portion main body 42 . In this way, when the length of the hooking portion 31b extending to the outside of the room is relatively long, a large gap is secured between the tip of the hooking portion 31b and the inner surface of the peripheral wall portion 11. The operation of releasing the insertion, that is, the operation of pulling the hook portion 31b by hand can be performed more easily.

Further, in the above-described embodiment, at least in the state (natural state) before the projecting portion 32 is elastically deformed, the extension portion main body 42 is positioned toward the interior side as it moves away from the recessed step portion 41 toward the center side opposite to the opening. Inclined. According to such a configuration, when the frame member 2 is attached to the opening C, the operation of inserting the projecting portion 32 into the insertion hole 15 can be facilitated, and the work efficiency of the operation of attaching the frame member 2 can be further improved. can.

(5) Modification In the above-described embodiment, the hooking portion 31b for putting a hand on when releasing the attachment of the fixture 3 is formed so as to extend from the base portion main body 31a while being inclined toward the outside of the room and toward the center of the opening. However, the hook portion 31b may have any shape as long as it has a gap with the inner surface of the peripheral wall portion 11 of the frame member 2. For example, the hook portion 31b may have an L-shaped bent shape.

In the above-described embodiment, the projecting portion 32 of the fixture 3 to be inserted into the insertion hole 15 includes an extending portion 33 extending from the base portion 31 to the side opposite to the center of the opening, and a tip of the extending portion 33 folded back toward the center of the opening. In addition, the substantially V-shaped protruding portion 32 having the folded portion 34 formed so as to approach the rear surface of the wall material W toward the center of the opening is adopted. Various modifications are possible as long as the shape can be elastically pressed and can be separated from the wall member W when the insertion is released. For example, a protruding portion that is bent in a substantially U shape (curving as a whole) may be employed.

In the above embodiment, an example in which an opening C is formed in a wall member W extending in the vertical direction and the inspection port device 1 is attached to the opening C has been described. It is widely applicable, and its target is not limited to wall materials (plate materials that define the sides of an indoor space). For example, it is possible to apply a similar inspection door device to a ceiling material that defines the upper surface (ceiling surface) of the indoor space and a floor material that defines the lower surface (floor surface) of the indoor space.

In the above embodiment, an example in which the present invention is applied to the inspection hatchway device 1 including the frame member 2 attached to the opening C and the cover member 4 detachably attached to the frame member 2 has been described. It can be widely applied to various structures (opening frame structure) in which a frame member is fixed to an opening formed in a plate using a fixture. Invention is applicable.

REFERENCE SIGNS LIST 1 inspection door device 2 frame member 3 fixture 4 lid member 11 peripheral wall portion 12 flange portion 15 insertion hole 31 base portion 31a base portion main body 31b hook portion 32 projecting portion 33 extension portion 34 folded portion 41 recessed step portion 41a bottom portion 41b Stepped portion 42 Main body of extension portion A1 Outside edge portion (of insertion hole) W Wall material (plate material)
C opening X indoor space Y outdoor space

Claims (3)

An opening frame structure comprising: a frame member attached to an opening formed in a plate that partitions an indoor space and an outdoor space; and a fixture that fixes the frame member to the plate,
The frame member includes a cylindrical peripheral wall portion formed along the peripheral edge of the opening, and a flange projecting from the end portion of the peripheral wall portion on the interior side toward the center side opposite to the opening and arranged along the surface of the plate member. and
The peripheral wall portion has an insertion hole penetrating the peripheral wall portion in the thickness direction at a position on the outdoor side of the back surface of the plate material,
The fixture has a base portion arranged closer to the center of the opening than the peripheral wall portion, and a projecting portion projecting from the base portion toward the center of the opening and inserted into the insertion hole,
The projecting portion is formed to elastically press the back surface of the plate material at a position on the opposite side of the center of the opening than the peripheral wall portion,
The base portion has a hook having a shape such that a gap is formed between a base portion main body arranged along the inner surface of the peripheral wall portion and an inner surface of the peripheral wall portion positioned on the outside of the base portion main body. An opening frame structure comprising: In the aperture frame structure according to claim 1,
The protruding portion includes an extending portion extending from the base portion through the insertion hole to a side opposite to the center of the opening from the peripheral wall portion, and a tip of the extending portion folded back toward the center of the opening and extending toward the center of the opening. and a folded portion formed so as to approach the back surface, and the tip of the folded portion contacts the back surface of the plate material in a state in which the crossing angle between the folded portion and the extended portion is elastically reduced. An opening frame structure, characterized in that it is formed in the In the aperture frame structure according to claim 1 or 2,
The opening frame structure, wherein the hook portion is formed so as to continuously extend from an outdoor-side end portion of the base portion main body while being inclined toward the outdoor side and the opening center side.

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