JPH08184242A - Fixing structure of ceiling-inspection cover - Google Patents

Abstract

PURPOSE: To visually monitor a locked state of an inspection cover with a fixture directly, and easily find that the fixture is turned up to a proper angle at the time of fixing the fixture. CONSTITUTION: A through hole 20 is installed at a spot near the outer edge of an inspection cover 18 where a fixture 21 is inserted from the lower side. The fixture 21 is provided with a substantially disk-shaped lower locking body 22 and a shaft 23 which rises from the top of a lower locking body 22 and an upper locking body 24 installed to the upper part of the shaft 23. A pair of studs 25 are erected from both ends of the upper locking body 24 in the longitudinal direction where an overhanging part 26 is projectingly installed to the outside surface of the upper end of each stud 25 outwardly. The upper locking part 24 is inserted into the through hole 20 and then the fixture 21 is turned by about 90 deg.C. A projected stripe 27 is installed on the top of the lower locking body 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing an inspection cover on a ceiling of a unit room or the like, and more particularly to a structure for preventing the inspection cover from rising by a fixing tool.

[0002]

2. Description of the Related Art In a unit room such as a unit bathroom, an inspection port 2 is provided in a ceiling panel 1 as shown in FIG. 6 for performing construction, electrical work, duct connection of a ventilation fan, maintenance and inspection, An inspection lid 3 is attached to the inspection port 2. In addition, 4 is a wall panel.

The inspection lid 3 is fitted into the inspection opening 1 from above. The inspection lid is held on the ceiling panel 1 by engaging a hook piece (not shown) protruding outward from the peripheral portion of the inspection lid with the edge portion of the inspection opening from above.

Preventing the inspection cover from floating up due to wind pressure when the door of the unit room is closed, or preventing the inspection cover from floating even if the inspection cover is pressed from below. In order to do so, the inspection lid is fixed by a fixing tool.

As such a structure for fixing the inspection lid,
As shown in FIG. 7 of Japanese Patent No. 7392, an opening 7 is formed in the vicinity of the inspection port 6 of the ceiling panel 5, and the edge of the inspection lid 10 is sticked from the upper end of the shaft body 8 inserted into the opening 7 with a rod. What is made to hold down is disclosed. A flange 11 is provided at the lower end of the shaft body 8, and the flange 11 is in contact with the lower surface of the peripheral edge of the opening 7.

The flange-shaped edge 10a of the inspection lid 10 is
It is placed on the upper end of the standing piece 12 at the edge of the inspection port 6 via the sealing material 13, and is pressed by the rod body 9 from above.

[0007]

In the conventional structure shown in FIG. 7, it is necessary for the rod 9 to surely cover the upper side of the edge portion 10a in order to firmly fix the inspection lid 10. Become. Japanese Utility Model Publication No. 5-7392 discloses that the collar portion 5 is provided with display means for indicating the direction of the rod body 9, but the state in which the rod body 9 is locked to the edge portion 10a from the inside of the unit room is shown. There is a disadvantage that the fixing condition of the inspection lid 10 cannot be directly checked from the inside because it cannot be directly visually inspected.

[0008]

The ceiling inspection lid fixing structure according to claim 1, wherein an inspection lid fitted from above to the inspection opening of the ceiling is locked to an edge portion of the inspection opening by a fixture, The present invention relates to a ceiling inspection lid fixing structure that prevents the inspection lid from rising.

The inspection lid is provided with an insertion hole for the fixture in the vicinity of the outer edge. The fixture includes a shaft body inserted into the insertion hole, an upper engagement body provided on the upper side of the shaft body and engaged with an upper surface of the inspection lid around the insertion hole, and a lower side of the shaft portion. And a lower locking body extending to the lower surface of the edge portion of the inspection port of the ceiling.

According to a second aspect of the present invention, there is provided a ceiling inspection lid fixing structure according to the first aspect, wherein the insertion hole has a non-circular shape, and the upper locking member has a shape projected on a plane so as to pass through the insertion hole. And a body portion whose side portion covers the upper surface of the edge portion of the insertion hole by being rotated around the axis of the shaft body,
A pair of overhanging portions projecting laterally outward from opposite sides of the side portion of the main body across the axis of the shaft body, and the tips in the projecting direction of the overhanging portions. The distance is larger than the maximum inner diameter of the insertion hole, and the protrusion is elastically retractable inward.

In the ceiling inspection lid fixing structure according to the third aspect, the inspection lid fitted from above to the inspection opening of the ceiling is locked to the edge portion of the inspection opening by the fixing tool so that the inspection lid is lifted. In the blocked ceiling inspection lid fixing structure, the inspection lid is provided with an insertion hole for the fixing tool in the vicinity of the outer edge, and the fixing tool includes the shaft body inserted through the insertion hole and the upper surface of the ceiling. Of the upper side of the inspection hole of the ceiling, which is arranged on the lower side of the shaft portion and is fitted to the shaft body and is locked to the upper surface of the inspection lid around the insertion hole. And a lower locking body extending to the lower surface of the edge portion.

According to a fourth aspect of the present invention, there is provided a ceiling inspection lid fixing structure according to the third aspect, wherein a flange portion is provided at an upper end portion of the shaft body, and an upper portion of the shaft body penetrates the upper locking body. The upper locking body is provided with a plurality of slits cut downward from the upper end surface, and the space between the slits is flexible. The collar portion of the shaft body has an outer shape that can pass through the inner hole while elastically expanding and deforming the tongue portion, and the collar portion is a flexible tongue portion. It is characterized in that it is locked to the upper surface of the upper locking body.

According to a fifth aspect of the present invention, there is provided a ceiling inspection lid fixing structure according to any one of the first to fourth aspects, wherein the lower locking member is a plate-like member extending along a lower surface of the inspection lid. The upper plate surface of the plate-shaped body is provided with a convex portion that engages with the boundary between the outer edge of the inspection lid and the edge portion of the inspection port.

[0014]

In the ceiling inspection lid fixing structure according to the first to fifth aspects, the fixture is supported by the inspection lid through the upper locking body.
By extending the lower locking body of the fixing tool to the lower surface of the edge portion of the inspection port on the ceiling, the inspection lid is prevented from rising. This lower locking body can be seen directly from the bottom of the ceiling (for example, from the inside of the unit room), so it can be seen directly that the lower locking body is securely covered on the lower surface of the edge of the inspection port. I can confirm.

In the ceiling inspection lid fixing structure according to the second aspect, when fixing the inspection lid, the fixing tool is inserted into the insertion hole of the inspection lid from the lower surface side of the inspection lid. When the main body of the fixture passes through the insertion hole, the overhanging portion protruding from the side surface of the main body hits the inner peripheral surface of the insertion hole and elastically retracts inward.
When the overhang portion passes through the insertion hole, the overhang portion elastically returns to the original posture. Since the distance between the laterally outward (protruding direction) tips of the pair of overhanging portions is larger than the maximum inner diameter of the insertion hole, the fixing tool will fall out of the insertion hole no matter how the fixing tool is rotated. Never.

In the third and fourth aspects, the shaft body and the upper locking body are separate bodies, and the shaft body is fitted to the upper locking body.

According to a fourth aspect of the present invention, the upper portion of the shaft body is pushed into the cylindrical upper locking body, the flange portion at the upper end of the shaft body is passed through the upper locking body, and is locked on the upper surface of the upper locking body. By doing so, the shaft body is locked to the upper locking body.

In the ceiling inspection lid fixing structure according to the fifth aspect, since the convex portion is engaged at the boundary between the inspection lid and the inspection opening, the fixing tool is rotated even if some rotational force is applied to the fixing tool. Instead, the inspection lid can be securely fixed. Further, when the fixing tool is rotated to fix the inspection lid, a slight clicking sensation is generated when the convex portion engages with the boundary, and the fixing operator's fingertip senses it. Thereby, the fixing operator can easily know that the fixing tool has rotated to an appropriate angle.

[0019]

EXAMPLES Examples will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a ceiling inspection lid fixing structure according to the embodiment, and FIG. 2 is a sectional view showing the structure of the embodiment (II- in FIG.
It is a sectional view of a portion along the line II).

An inspection port 16 is provided in the ceiling panel 15,
A standing piece 17 is raised from the edge of the inspection port 16.

An edge portion 18a of an inspection lid 18 attached to the inspection port 16 covers the upper side of the standing piece 17 with a sealing material 19 interposed therebetween. In this embodiment, the ceiling panel 15
The inspection lid 18 is composed of a steel plate and a heat insulating material such as a gypsum board.

An insertion hole 20 is provided in the vicinity of the outer edge of the inspection lid 18, and a fixture 21 is inserted from below. The fixture 21 includes a substantially disk-shaped lower locking body 22, a shaft body 23 that rises from the upper surface of the lower locking body 22, and an upper locking body 24 that is provided above the shaft body 23. Is equipped with.

The upper locking body 24 and the insertion hole 20 are ground-shaped in a plan view, and the insertion hole 20 is slightly upward so that the upper locking body 24 can pass through the insertion hole 20. It is larger than the locking body 24.

In this embodiment, a pair of pedestals 25 are erected from both ends in the longitudinal direction of the upper locking body 24, and an overhanging portion 26 is provided on the outer surface of the upper end of each pedestal 25 to project outward. Has been done. The outer tip of the overhanging portion 26 is projected more outward than both ends of the upper locking body 24.

The distance between the outer tips of the overhanging portions 26 is
It is larger than the maximum inner diameter of the insertion hole 20. Therefore, when the upper locking body 24 is inserted into the insertion hole 20, the pedestals 25 bend in the approaching direction. When the overhanging portion 26 passes through the insertion hole 20, the pedestal 25 returns to its original shape,
The overhanging portion 26 overhangs on the upper surface side of the insertion hole 20.

A ridge 27 extends in the diametrical direction on the upper surface of the lower locking body 22. The extending direction of the ridge 27 is orthogonal to the longitudinal direction of the upper locking body 24.

In order to fix the inspection lid 18 with this fixture 21, the upper engaging body 24 is inserted into the insertion hole 20 until the lower engaging body 22 contacts the lower surface of the inspection lid 18, and then about 9
It is only necessary to rotate the 0 ° fixture 21 in the θ direction in FIG. As a result, the lower locking body 22 is locked around the lower surface of the edge of the inspection port 16 of the ceiling panel 15 as shown in FIG. 2, and the inspection lid 18 is prevented from rising.

Since the degree to which the lower side locking body 22 is hooked on the ceiling panel 15 can be seen directly from the inside of the unit room, it is possible to easily check that the inspection lid 18 is firmly fixed by the fixing tool 21. You can

The fixture 21 is moved about 90 ° in the direction of the arrow θ.
When turned, the ridge 27 enters the boundary between the inspection lid 18 and the edge of the inspection port 16. At this time, a slight click feeling occurs,
Impressed by the operator's fingertips. As a result, the operator can feel by touch that the fixture 21 has reached the locked position. Further, in the fixed state where the ridge 27 enters the boundary as shown in FIG. 2, the fixing tool 21 does not rotate even if a slight rotational force is applied to the fixing tool 21, and the locking of the fixing tool 21 occurs. Is never released.

In this embodiment, when the fixing tool 21 is rotated so that the longitudinal direction of the upper locking body 24 coincides with the longitudinal direction of the insertion hole 20 in order to unlock the fixing tool 21, as shown in FIG. As described above, the projecting portions 26, 26 are caught at both ends of the insertion hole 20, and the fixing tool 21 does not fall out from the inspection lid 18. Therefore, it is possible to prevent the fixing tool 21 from falling off or being lost when the inspection lid 18 is removed to perform the above-ceiling work. In addition, after attaching the fixture 21 to the inspection lid 18 in advance, the inspection lid 1
It is also possible to use the method of fitting 8 into the inspection port 16.

FIG. 4 is an exploded perspective view of a ceiling inspection lid fixing structure according to another embodiment, and FIG. 5 is a sectional view showing the structure of this embodiment (a sectional view of a portion along the line VV in FIG. 4). ).

In this embodiment, the fixture 21A is provided with a shaft body 23A which is thicker than the shaft body 23 of the above embodiment. An arcuate portion 20a is provided in the insertion hole 20A so that the thick shaft member 23A can pass therethrough.

Other configurations of the embodiment shown in FIGS. 4 and 5 are the same as those shown in FIGS. 1 and 2, and the same reference numerals indicate the same parts. With the structure shown in FIGS. 4 and 5, the same effect as that of the structure shown in FIGS.

When the fixing member 21A is inserted into the insertion hole 20A and then the fixing member 21 is rotated in the direction of the arrow θ, the outer peripheral surface of the shaft member 23A is brought into contact with the inner peripheral surface of the arcuate portion 20a. Then, the fixture 21A rotates extremely smoothly. Further, the fixture 21A is also positioned so that the fixture 21A is always positioned in the arcuate portion 20a of the insertion hole 20A.

Still another embodiment will be described with reference to FIGS.

The fixing member 21B of this embodiment includes the lower locking body 2
2 and the shaft body 23B are integrated, and the upper locking body 24
B is separate from these. The upper locking body 24B has a cylindrical shape, and has a plurality of threads (in this embodiment, 4
By slitting the slits 31), four flexible tongue pieces 32 are formed.

At the upper end of the shaft body 23B, a collar portion 33 is provided which is inserted into the upper locking body 24B while pushing the tongue piece portion 32 away as shown in FIG. When the collar portion 33 passes through the upper locking body 24B, the tongue piece portion 32 returns to the original state, and the collar portion 33 is locked on the upper surface of the upper locking body 24B. The side peripheral surface of the collar portion 33 is tapered, and the upper inner surface of the upper locking body 24B is also tapered.

Insertion hole 20B into which this shaft 23B is inserted
Has a circular hole.

The other construction of this embodiment is the same as that of the embodiment of FIGS. 1 to 3, and the same reference numerals indicate the same parts.
With the structure shown in FIGS. 8 to 10, it is possible to obtain the same effect as that of the structure shown in FIGS. According to the present embodiment, even if the fixing tool 21B is rotated, the fixing tool 21B does not come out of the insertion hole 20B.

FIG. 11 is a constitutional view of an upper locking body 24C having another shape which can be used in the structure of the embodiment shown in FIGS. This upper locking body 24C also has a cylindrical shape, and the slit 3
5 forms a tongue piece portion 34. The stepped portion 3 for locking the collar 33 is provided in the middle of the inner hole of the upper locking body 24C.
6 is provided. The lower surface of this step portion 36 has a tapered surface 3
6a.

The above embodiment is an example of the present invention, and the present invention may have a configuration other than that shown in the drawings. For example, in the embodiment of FIGS. 1 to 5, the overhanging portion 26 is connected to the upper locking bodies 24 and 24A via the pedestal 25, but the overhanging portion is directly connected to the side surface of the upper locking body 24. You may project. Also, the fixture 2
Instead of the ridge 27 of the lower locking body 22 of 1, 21A, 21B, a projecting protrusion may be provided. This lower locking body 22
It is obvious that the shape of may be other than circular.
A concave groove with which a tool such as a flat-blade screwdriver is engaged may be provided on the lower surface of the lower locking body 22. Furthermore, the 8th to 10th
In the illustrated embodiment, the peripheral side surface of the collar 33 and the upper locking body 24
Both the inner surfaces of the upper portion of B are tapered, but the taper may be provided on at least one of them.

[0042]

According to the ceiling inspection lid fixing structure of the first to fifth aspects, it is possible to directly visually check the locked state of the inspection lid by the fixture.

According to the ceiling inspection lid fixing structure of the second to fourth aspects, it is possible to prevent the fixing tool from falling out of the insertion hole, and to prevent the fixing tool from being lost when the inspection lid is attached or reattached.

In the structure of claim 4, the shaft body can be easily fitted to the upper locking body.

According to the ceiling inspection lid fixing structure of claim 5,
It is possible to prevent rotation of the fixture in the unlocking direction,
It is possible to easily know that the fixing tool has rotated to an appropriate angle during the fixing work of the fixing tool.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a ceiling inspection lid fixing structure according to an embodiment.

FIG. 2 is a cross-sectional view of a portion along the line II-II in FIG.

FIG. 3 is a cross-sectional view showing an engagement state of a fixing tool 21 with an insertion hole.

FIG. 4 is an exploded perspective view of a ceiling inspection lid fixing structure according to another embodiment.

5 is a cross-sectional view of a portion taken along the line VV of FIG.

FIG. 6 is a perspective view of a unit room.

FIG. 7 is a sectional view showing a conventional example.

FIG. 8 is an exploded perspective view of a ceiling inspection lid fixing structure according to still another embodiment.

9 is a sectional view of a portion taken along the line IX-IX in FIG.

10 is a perspective view showing an engagement relationship between an upper locking body and a shaft body in FIG. 8. FIG.

11A and 11B are configuration diagrams of an upper locking body 24C, in which FIG. 11A is a side view, FIG. 11B is a plan view, and FIG. 11C is C in FIG.
It is sectional drawing which follows the C line.

[Explanation of symbols]

 15 Ceiling Panel 16 Inspection Port 18 Inspection Lid 20, 20A, 20B Insertion Holes 21, 21A, 21B Fixture 22 Lower Locking Body 23, 23A, 23B Shaft Body 24, 24A, 24B, 24C Upper Locking Body 26 Overhang Department

Claims (5)

[Claims] 1. A ceiling inspection lid fixing structure in which an inspection lid fitted from above to an inspection opening on a ceiling is locked to an edge portion of the inspection opening by a fixture to prevent the inspection lid from rising. The inspection lid is provided with an insertion hole for the fixture in the vicinity of the outer edge, and the fixture is provided with a shaft body inserted through the insertion hole and an upper side of the shaft body. An upper locking body that is locked to the upper surface of the surrounding inspection lid, and a lower locking body that is provided below the shaft portion and extends to the lower surface of the edge of the inspection port of the ceiling. Ceiling inspection lid fixed structure. 2. The insertion hole has a non-circular shape according to claim 1, and the upper locking body has a shape in which a projection shape on a plane can pass through the insertion hole.
Further, a main body portion whose side portion covers the upper surface of the edge portion of the insertion hole by being rotated around the axial center of the shaft body, and between the side portions of the main body portion, the axis line of the shaft body is sandwiched. A pair of overhanging portions protruding outward from opposite positions, the distance between the tips of the overhanging portions in the projecting direction being larger than the maximum inner diameter of the insertion hole, and A ceiling inspection lid fixing structure including an overhanging portion that can be elastically retracted inward. 3. A ceiling inspection lid fixing structure in which an inspection lid fitted from above to an inspection opening on the ceiling is locked to an edge portion of the inspection opening by a fixture to prevent the inspection lid from rising. The inspection lid is provided with an insertion hole for the fixture in the vicinity of the outer edge. The fixture is arranged on the shaft body inserted through the insertion hole and on the upper surface side of the ceiling. An upper locking body that is fitted and is locked to the upper surface of the inspection lid around the insertion hole, and a lower portion that is provided below the shaft portion and extends to the lower surface of the edge portion of the inspection port of the ceiling. A ceiling inspection lid fixing structure characterized by having a side locking body. 4. The flange according to claim 3, wherein a flange is provided at an upper end of the shaft body, and the upper locking body has an inner hole extending in a vertical direction through which an upper part of the shaft body penetrates. The upper locking body is provided with a plurality of slits each having a shape cut downward from the upper end surface, and a flexible tongue portion is provided between the slits. The collar portion of the shaft has an outer shape capable of passing through the inner hole while elastically expanding and deforming the tongue portion, and the collar portion engages with an upper surface of the upper locking body. Ceiling inspection lid fixing structure characterized by being stopped. 5. The lower locking body according to any one of claims 1 to 4, wherein the lower locking body is a plate-like body extending along a lower surface of the inspection lid, and the plate-like body has an upper plate surface. Is a ceiling inspection lid fixing structure in which a convex portion engaged with a boundary between an outer edge of the inspection lid and an edge portion of the inspection opening is provided.