JP2002227399A - Floor inspection opening and assembling method for floor inspection opening - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and positively assemble a cover body to an outer frame without a dimensional deviation. SOLUTION: This floor inspection opening is provided with an outer frame mounted into a nearly square opening provided in a floor part; an inner frame detachably fitted into the outer frame, and an opening/closing cover body formed by mounting the inner frame to the peripheral edge of a cover plate. The inner frame 3 is composed of four inner frame members 31 having mounting grooves 31c that can fittingly insert the edge part of the cover plate 33, and corner pieces 32 for connecting the adjacent inner frame members 31 to each other slidably in the longitudinal direction of the inner frame members 31. Oblong holes 32a are formed on both sides of the corner piece 32, and an engaging protrusion 34 engaged with the oblong holes 32a is formed at the inner frame member 31. When the engaging protrusion 34 is in a slidable state in the oblong hole 32a and the edge part of the cover plate 33 is in the state of being fittingly inserted in the mounting groove 31c of each inner frame member 31, the inner frame member 31 and the cover plate 33 are fixed by a fixing member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor inspection port and an assembling method thereof, and more particularly, is used as an outlet for articles such as an underfloor storage, an underground storage, or an entrance to a basement. The present invention relates to a floor inspection port and a method of assembling the floor inspection port.

[0002]

2. Description of the Related Art In general, a floor inspection opening serving as an outlet for articles in an underfloor storage box is detachably fitted into an outer frame attached to the periphery of a substantially square floor opening. And an opening / closing lid for mounting the inner frame on the periphery of the lid plate. Such an inner frame is formed of, for example, an extruded shape member made of an aluminum alloy, and cuts each end of the U-shaped frame member cut into a fixed length at an angle of 45 degrees, thereby forming an inner frame. In a state where they are aligned with each other, a fixing screw is tightened so that they can be assembled into a square.

[0003] Further, a floor plate cut off from the floor plate at the site when the floor opening is formed is used as the lid plate for mounting the inner frame.

[0004] Therefore, the conventional floor inspection port is provided in a state where the inner frame is disassembled or disassembled so that the cover plate can be assembled at the site.

[0005]

However, in assembling the lid, the lid is formed accurately with respect to the outer frame so as to smoothly open and close and prevent rattling and unnecessary gaps as a part of the floor. Is required. Further, in assembling the lid, it is necessary to assemble the inner frame firmly without distortion using a corner connector, a large number of fixing screws, and the like, which complicates the on-site assembling work.

Further, when assembling the lid body by attaching the inner frame material to the peripheral edge of the lid plate material, the inner frame material of one side of the inner frame which is framed in a rectangular shape is removed, and the mounting groove (copper) of the inner frame material is removed. After the cover plate is inserted from the side into the V-shaped groove), the removed inner frame member is tightened with the fixing screw, so that the assembling work of the cover is troublesome. Further, since the outer frame, the inner frame, and the lid are required to be airtight, not only the number of assembling steps is increased, but also the assembling is performed with great care, which is troublesome. In particular, in the lid, since the end of the inner frame is formed at an angle of 45 degrees, the inner frame and the lid must be accurately assembled to fit the corners of the outer frame.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a floor inspection port capable of easily and reliably assembling a lid body to an outer frame mounted on a site without causing dimensional deviation. Another object of the present invention is to provide a method for assembling a floor inspection port.

[0008]

According to a first aspect of the present invention, there is provided an outer frame attached to a substantially rectangular opening provided on a floor, and an outer frame detachably mounted in the outer frame. A floor inspection port provided with an inner frame that fits into, and an opening / closing lid body that is attached to the periphery of the lid plate material,
The inner frame has four inner frame members having a mounting groove into which the edge of the lid can be inserted, and a corner connecting member that connects adjacent inner frame members to be slidable in the longitudinal direction of the inner frame member. And forming an elongated hole along the longitudinal direction of the inner frame material on one of the inner frame material and the corner connecting member, and an engaging projection slidably engaged in the elongated hole on the other. Forming
When the engagement projection is slidable in the elongated hole, and in a state where the edge of the lid plate is inserted into the mounting groove of each of the inner frame members, the inner frame member is fixed with the fixing member. It is characterized by being fixed to a cover plate.

With this configuration, an elongated hole is formed in one of the inner frame member and the corner connecting member along the longitudinal direction of the inner frame member, and the other is slidably engaged in the elongated hole. Since the engaging projections are formed so as to engage with each other, when the engaging projections engage with the long holes, the entire inner frame can be expanded or contracted by sliding the inner frame material along the corner connecting member. After inserting the cover plate material into the inner frame from the surface direction with the inner frame expanded, the inner frame is reduced, the peripheral portion of the cover plate material is inserted into the mounting groove in the inner frame member, and the inner frame is fixed with the fixing member. The lid can be assembled by fixing the material and the lid plate.

According to a second aspect of the present invention, in the floor inspection port of the first aspect, the outer frame and the inner frame are formed in a tapered shape such that the width of the frame gradually decreases from the upper end to the lower end. It is characterized by.

As described above, by forming the outer frame and the inner frame in a tapered shape narrower from the upper end to the lower end, there is no gap between the outer frame and the inner frame. Can be assembled in close contact with each other, and the airtight structure can be made even more reliable.

According to a third aspect of the present invention, there is provided an outer frame mounted in a substantially rectangular opening provided in a floor portion, and a temporarily assemblable inner frame detachably fitted in the outer frame. A method for assembling a floor inspection port including an opening / closing lid body having the inner frame attached to a peripheral edge of the lid plate material, wherein the four inner grooves having mounting grooves into which edges of the lid plate material can be inserted. Moving at least two adjacent frame members to expand the inner frame,
A temporary assembling step of placing the lid plate material in the expanded inner frame, temporarily reducing the inner frame, inserting the edge of the lid into the mounting groove of the inner frame material, and temporarily assembling the lid, A positioning step of fitting the set lid body into the outer frame and positioning a corner between adjacent inner frame materials; and, when positioned, the inner frame material and the lid plate material are fixed by a fixing member. And an assembling step of fixing and assembling the lid.

According to the third aspect of the present invention, since the method includes the expanding step, the temporary assembling step, the positioning step, and the assembling step, the outer frame attached to the opening provided in the floor portion. Can be used as a jig to fix the inner frame material and the cover plate material. That is, the lid can be formed based on the outer frame attached to the site. Therefore, the dimensional deviation of the lid does not occur, and the lid can be accurately and easily assembled to the outer frame.

According to a fourth aspect of the present invention, in the method of assembling a floor inspection opening according to the third aspect, a plate member for adjusting a clearance is provided between the outer frame and the inner frame member in the positioning step. It is characterized by being interposed.

By using such a plate member for adjusting the clearance, when the lid is formed in the outer frame, the lid can be accurately assembled to the outer frame with a certain gap, and the efficiency can be improved. Assembly can be performed.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a floor inspection port according to the present invention will be described in detail with reference to the drawings. 1 to 1
0 indicates a first embodiment of the floor inspection port according to the present invention.

As shown in FIG. 1, a floor inspection port 1 shown in this embodiment has an outer frame 2, an inner frame 3 removably fitted into the outer frame 2, and a cover plate member 33. And a lid 4 attached to the periphery of the cover.

As shown in FIGS. 1, 6 (a) and 9, the outer frame 2 has a framed shape attached to an opening 5 formed in a substantially rectangular shape on the floor F, A lower flange 21 for mounting the inner frame 3, an upright wall 22 formed on the lower flange 21 along the circumference thereof, and an upper wall formed on the upper end of the upright wall 22 so as to extend outward along the horizontal direction. A flange 23;
It has a substantially L-shaped cross section including a side piece 24 protruding from an outer portion of the upright wall 22.

The outer frame 2 has a lower flange 21 and a floor joist N.
When the upper joist S is placed on the sub joist S fixed inside and the upper flange 23 is in contact with the floor F surface and the side piece 24 is in contact with the end face of the floor joist N, the lower Flange 2
The wood screw 6 is fastened to the sub joist S from the first screw insertion hole 21a (see FIG. 6), so that the wood screw 6 can be mounted in the opening 5.

The inner frame 3 has four inner frame members 31 as shown in FIG. 1 and the inner frame members 3 as shown in FIGS.
And a corner connecting member (hereinafter, referred to as a corner piece) 32 for connecting the first and second members 1 in a rectangular frame shape.

More specifically, as shown in FIGS. 1 to 3, the inner frame member 31 has a substantially U-shaped cross section, and the lower plate 31a and the upper flange 31b fit the cover plate 33. It has a mounting groove 31c for insertion (FIG. 5).
And FIG. 6).

The inner frame member 31 has a projection 31d which is slightly hung down on the inner wall of the upper flange 31b, and a step 31e formed at the base of the lower flange 31a. 31a and protrusion 3
As shown in FIG. 2, a corner piece 32 can be inserted between 1d and the upright portion 31f. At the inner end of the lower flange 31a, as shown in FIGS.
A horizontal step edge 31h is formed via a bent portion 31g bent downward. Furthermore, the inner frame material 31
The outer edge of the upper flange 31b is provided with a bulging portion 31i slightly projecting outward.

As shown in FIG. 6, the lower flange 31a projects inwardly from the lower flange 21 of the outer frame 2 when fitted to the outer frame 2, and an insertion hole 3a is formed at the projecting portion. Has been established. Therefore, as described later, in a state where the inner frame 3 is fitted to the outer frame 2, the wood screw 7 </ b> A for fixing the cover plate 33 to the insertion hole 3 a can be tightened without interfering with the lower flange 21 of the outer frame 2. .

The insertion hole 3 in the lower flange 31a
As shown in FIG. 3, a pair of pointed projections 31 j are provided on both sides of the upper surface side region where “a” is provided in parallel with each other along the longitudinal direction of the inner frame member 31. These projections 31j
As will be described later, when the wood screw 7A, which is a fixing member penetrating the insertion hole 3a, is tightened to the cover plate 33 to fix the inner frame 3 and the cover plate 33, the projection 31j bites into the cover plate 33, and the fixing portion It is intended to improve the airtightness of the vehicle.

On the other hand, the corner piece 32 has an angle shape obtained by bending a band-shaped plate at a right angle as shown in FIG. 3, and both ends of the corner piece 32 have inner frame members 3 as shown in FIG.
By being inserted between the upright portion 31f and the lower flange 31a and the protrusion 31d, the adjacent inner frame members 31 can be abutted against each other. Therefore, both ends of the inner frame member 31 are formed at an angle of 45 degrees so that the width gradually becomes narrower from the outside to the inside as shown in FIGS.

A long hole 32a is formed on both sides of the corner piece 32, and an engagement protrusion 34 for engaging with the long hole 32a is formed on the inner frame member 31. Long hole 32
“a” is formed in the central portion on both sides of the corner piece 32 along the length direction thereof. When the corner piece 32 is inserted into the end portion of the inner frame material 31, the engagement protrusion 34 moves from the outside of the inner frame material 31 to the inside of the elongated hole 32 a provided in the corner piece 32. It is crimped by a press and protruded. Thereby, in the factory, the inner frame member 31 and the corner piece 32 are slidable in the longitudinal direction of the inner frame member 31, that is, the inner frame 3 is assembled so as to be expandable.
In this case, the inner frame 31 can be expanded by moving at least two adjacent four of the four inner frame members 31 outward.

When the adjacent inner frame members 31 are brought into contact with each other, the engaging projections 34 are slid along the long holes 32a of the corner pieces 32 so that the adjacent inner frame members 31 come into contact with each other. I can do it. Therefore, when the engagement protrusion 34 is in the engagement state with the long hole 32 a of the corner piece 32, when the inner frame members 31 are slid along the corner piece 32 so as to approach each other, the adjacent inner frame members 31 are moved. A square inner frame 3 is formed by abutting each other at right angles, and the inner frame 3 can be expanded by sliding the inner frame 3 in the direction of the arrow shown in FIG.

Further, when the inner frame material 31 is slidable by the corner piece 32, the cover plate material 33 is inserted into the mounting groove 31c of each inner frame material 31 from the top as shown in FIG. After the fitting, the inner frame member 31 is abutted against each other as shown in FIG. 5, and the wood screw 7A is tightened in this state, whereby the lid 4 is configured.

In this case, a reinforcing member 36 is attached to the bottom of the cover plate member 33, as shown in FIG. As shown in FIG. 7, the reinforcing member 36 has a U-shaped main body 36a.
Is formed in a hat-shaped section having outwardly extending wing pieces 36b at both ends. Then, the cover plate 33 is attached to the inner frame 31.
When fixing the inner frame material 3 as shown in FIG.
The main body 36a of the reinforcing member 36 is inserted into the notch 37 provided at the center of the first step edge 31h, and the two wing pieces 36b are placed on the step edge 31h as shown in FIG. 7B. In this state, the cover plate 33 is tightened by the wood screws 7A passing through the insertion holes 3a provided in the inner frame member 31, and the wood screws 7B passing through the insertion holes 3b provided in the reinforcing member 36 as shown in FIG. I try to tighten it.

The reinforcing member 36 is formed of, for example, a steel member, and is disposed on the back surface of the lid 3 (see FIG. 9).

In this embodiment, the inner frame member 31 is used.
Is formed of an extruded aluminum alloy material like the outer frame 1. The corner piece 32 is formed of a steel member formed by press molding.

As shown in FIG. 9, a handle 8 for opening and closing the lid 4 is attached to the lid 4 configured as described above. Although the configuration of the handle 8 is not shown in detail, a round hole 33a provided at a predetermined position of the cover plate 33 (see FIG. 1).
When it is inserted from above, the handle 8 is attached to the lid 4 by being tightened with the nut 8b. Then, when the push portion 8a of the handle 8 is pressed down, the handle 8 rises upward from the opposite side so that the handle 8 can be gripped and the opening / closing operation can be performed.

On the other hand, the outer frame 2 is provided with first and second seal members, for example, packings 9A and 9B. As shown in FIG. 10, the packings 9A and 9B are formed in a string shape having a circular cross section by a stretchable elastic material such as a synthetic rubber, and both ends of the packings 9A and 9B become endless by a connecting metal fitting 10, that is, an endless shape. Is formed.
One of the packings 9A is mounted in a first mounting groove 25 which is provided in the outer portion 24 of the outer frame 2 and opens in the outer peripheral direction, and the other packing 9B is mounted on the lower flange 21.
Is mounted in a second mounting groove 26 that opens in the outer peripheral direction provided on an inner peripheral upright wall 21a that rises at the front end portion.

In this case, the first and second mounting grooves 25, 2
6, projections 27 and 28 for pressing the packings 9A and 9B outward are provided along the longitudinal direction of the groove, and the packings 9A and 9B are formed by the projections 27 and 28.
Are always exposed in a protruding state from the first and second mounting grooves 25 and 26.

To mount the packings 9A and 9B in the first and second mounting grooves 25 and 26, the diagonal direction of the first or second mounting grooves 25 and 26 with the packings 9A and 9B extended. After being bridged over the two corners facing each other, it can be easily and reliably mounted by bridging the remaining two corners facing each other.

When these two packings 9A and 9B are attached to the outer frame 2 in an extended state, and the outer frame 2 is attached to the opening 5, the end face of the floor joist N and the upright portion 22 of the outer frame 2 are formed. The packing 9 </ b> A is compressed and elastically deformed therebetween, so that the floor joist N and the outer frame 2 have an airtight structure. When the cover 4 is attached to the outer frame 2, the cover 4
The packing 9 </ b> B is compressed and elastically deformed by the inner frame member 21 so that the space between the outer frame 2 and the lid 4 has an airtight structure.

At this time, the projection 27 is provided in the first mounting groove 25.
Are formed, and the projections 28 are also provided in the second mounting grooves 26.
As shown in FIG. 6, the protrusion 27 cuts into the packing 9A to make the space between the floor joist N and the outer frame 2 more airtight, and the protrusion 28 cuts into the packing 9B to form the outer frame 2 as shown in FIG. And the lid 4 can be made more airtight.

Next, the floor inspection port 1 constructed as described above.
An embodiment of the assembling method will be described.

First, the outer frame 2 and the inner frame 3 are supplied to the site in a state where they are assembled in a factory in advance. And floor F
The opening is formed in accordance with the dimensions of the outer frame 2, and the floor plate cut out from the opening 5 is processed into a lid plate 33 in accordance with the dimensions of the inner frame 3.

Next, in the inner frame 3, the four inner frame members 31 slidably framed by the engagement projections 34 engaging with the long holes 32 a of the corner pieces 32 are respectively moved in the directions of arrows shown in FIG. The inner frame 2 is moved and expanded so that the entire frame width is increased. That is, an extension step of extending the entire inner frame 3 is performed. In this case, at least two of the four inner frame members 31 may be moved outward (in the direction of the arrow shown in FIG. 1) to expand the inner frame 3.

When the inner frame 3 is in the expanded state in this way, as shown in FIG. 4, the edge of the cover plate 33 is inserted into the mounting groove 31c in each inner frame 31. At this time, FIG.
As shown in (5), the reinforcing member 36 is inserted into the notch 37 of the step edge 31h in the inner frame member 31, and the two wings 36b of the reinforcing member 36 are placed on the step edge 31h.

After the cover plate 33 is put in the inner frame 3 expanded in this way, the engaging projections 34 are moved along the long holes 32a of the corner pieces 32, and are moved in the direction opposite to the arrow shown in FIG. Then, the inner frame 3 is contracted to fit the edge of the cover plate 33 into the mounting groove 31c of the inner frame 31, and the cover 4 is temporarily assembled. That is, a temporary assembling step of temporarily assembling the lid 4 is performed.

Next, when the cover 4 is temporarily assembled, the cover 4 is inserted into the outer frame 2 so that the cover 4
The inner frame member 31, the corner piece 32, and the cover plate member 33 constituting the above are positioned with respect to each other. That is, a positioning step of positioning the corners between the adjacent inner frame members 31 is performed. At the time of this positioning, as shown in FIG. 11, while taking care that the gap L between the outer frame 2 and the inner frame material 31 is uniform around the periphery, and as shown in FIG.
Position the corners of each other.

However, when the gap L is large at the time of this positioning, a plate member 11 for adjusting the clearance may be used as shown in FIG. This plate member 11 corresponds to FIG.
As shown in (b), for example, it is a synthetic resin plate having a thickness of about 0.5 mm. This plate member 11 is shown in FIG.
As shown in (a), the upright wall 22 in the outer frame 2 and the inner frame material 3
1, and in this state, the gap L is expanded so as to press each of the inner frame members 31 in the direction of the cover plate member 33, thereby positioning the inner frame member 31 with a constant gap L around the periphery. In other words, the inner frame member 31, the corner piece 32, and the cover plate member 33 that constitute the lid body 4 use the outer frame 2 as a jig via the clearance adjustment plate member 11, and
It is positioned at a predetermined position on the outer frame 2. Therefore, the lid 4 can be accurately positioned with respect to the outer frame 2.

When the outer frame 2 and the cover 4 are turned upside down as shown in FIG. 5 in the thus positioned state, the inner frame is moved inward from the lower flange 21 of the outer frame 2. Since the insertion hole 3a formed in the lower flange 31a of the third member 3 is exposed, the wood screw 7A can be tightened from the insertion hole 3a to the cover plate 33 in this positioning state. Therefore, the inner frame member 31 and the cover plate member 33 can be accurately fixed without fixing the corner piece 33. That is, the assembly process of the entire lid 4 is performed to complete the assembly of the lid 4.

In this assembling method, as described above,
The inner frame material 31 is previously inserted into the long hole 32a of the corner connecting member 32.
An expansion step of sliding the inner frame material 31 formed by slidably engaging the engagement projections 34 of the inner frame 3 to expand the entire inner frame 3, and placing the lid plate material 33 in the expanded inner frame 3. Then, the inner frame member 31 is slid in the opposite direction to reduce the inner frame, and thereby the cover plate member 33 is inserted into the mounting groove 31c of each inner frame member 31.
A temporary assembling step of temporarily assembling the lid 4 by inserting the edge portion of the above, and fitting the temporarily assembled lid 4 to the upright wall 22 in the outer frame 2 via the clearance adjusting plate member 11; A positioning step of positioning a corner between adjacent inner frame members 31;
When in the positioned state, the inner frame member 31 and the lid plate member 33
And a fixing step of fixing the inner frame member 31 and the cover plate member 33 by tightening the screws with the wood screws 7A.

As a result, the inner frame 3
1 and the cover plate 33 are fixed, that is, the floor F
The lid 4 can be formed based on the outer frame 2 attached to the opening 5 provided in the section. Therefore, unlike the related art assembled by fixing the inner frame material disassembled at the site via the corner connector, the dimensional deviation of the lid 4 does not occur, and the lid 4 is attached to the outer frame 2. On the other hand, it can be assembled accurately and easily.

As described above, when the lid 4 is formed, the cover 4 can be formed without using the plate member 11 for adjusting the clearance.
However, if the plate member 11 is used, the lid 4 can be accurately assembled to the outer frame 4 with a constant gap L, and efficient assembly can be performed.

As the plate member 11, an example using a simple flat plate as shown in FIG. 13 has been shown, but other than this, for example, a plate 11A bent at a right angle as shown in FIG. The same operation and effect can be obtained by inserting this into the corner between the outer frame 2 and the lid 4.

The floor inspection port 1 of this embodiment is configured such that the inner frame 3 and the cover plate 33 are fitted and positioned in the outer frame 2 at the stage of the temporary assembly of the inner frame 3 and the cover plate 33. Since the cover 4 can be fixed and assembled, accurate assembly based on the outer frame 2 can be performed. Further, the entire inner frame 3 is formed so as to be expandable by slidably caulking the engagement protrusions 34 of the inner frame material 31 and the long holes 32a of the corner pieces 32.
The above-mentioned assembling method can be performed accurately by facilitating the process of the temporary assembly.

Further, in the inner frame member 31, since the bulging portion 31i is provided at the outer edge of the upper flange 31b,
When the floor inspection port 1 is viewed from above, an extremely small gap is formed between the lid 4 and the outer frame 2 due to the presence of the bulging portion 31i.
It also looks good.

In the illustrated embodiment, the inner frame 3
1 has an engaging projection 34 and the corner piece 32 has a long hole 3
Although the example in which 2a is formed is shown, the configuration may be reversed. That is, as shown in FIG. 15, a long hole 31k is formed in the upright portion 31f of the inner frame member 31, and opposing projections 31m and 31n are formed outside the long hole 31k so that the corner piece 32 can be inserted. I do. Then, with the corner piece 32 inserted between the opposing protrusions 31m and 31n of the inner frame member 32, the engaging protrusion 32b is swaged from the outside of the corner piece 32 at the position of the long hole 31k to form the long hole 31k.
And the engaging projection 32b may be formed so as to slidably engage with each other. A bulging portion 31i is formed at the outer edge of the facing protrusion 31m.

As described above, even if the engaging projection 32 is provided on the corner piece 32 and the elongated hole 31k is provided on the inner frame member 31, the inner frame member 31 can slide along the corner piece 32, and the inner frame member 2 can be slid.
Can be expanded or reduced, and the same operation and effect as described above can be obtained.

In the above embodiment, the lid 4
In the example shown in FIG. 16, the wood screw 7 </ b> A is tightened from below the inner frame material 31. However, as shown in FIG. 16, the wood screw 7 </ b> A is tightened from the side of the inner frame material 31 to the cover plate 33. It may be. In this case, the screw operation hole 22a is formed in the upright wall 22 of the outer frame 2 so that the wood screw 7A can be tightened from the outer frame 2 to the inner frame member 31 and the cover plate member 33.
It is necessary to provide.

17 to 19 show another embodiment of the floor inspection port 1. FIG. The floor inspection port 1 shown in FIG. 17 is formed in a narrow tapered shape in which the outer frame 2A gradually narrows the frame width from the upper end to the lower end, and the inner frame member 31A and the inner frame material 31A correspond to the outer frame 2A. The corner piece (not shown) is also formed in a narrow tapered shape.

In this case, in the outer frame 2A, a first mounting groove 22b for the packing 9A is formed in a leg 22c provided on the upper flange 22. A second mounting groove 31p for the packing 9B is also formed on the outer peripheral portion of the upper flange 31b of the inner frame member 31A.

Therefore, the space between the floor F and the outer frame 2 is kept airtight by the packing 9A mounted in the first mounting groove 22b, and the packing 9B mounted in the second mounting groove 31p of the inner frame member 31A. Thereby, the space between the outer frame 2 and the inner frame member 31 can be kept airtight.

As described above, when the outer frame 2A is formed in a tapered shape and the inner frame member 31A is also formed in a tapered shape corresponding to the tapered shape, the clearance for opening and closing is not required as shown in FIG. The inner frame member 31A can be assembled in a state in which the inner frame member 31A is in close contact with the frame 2, and the air-tight structure can be further ensured.

As described above, since the outer frame 2A and the inner frame 3A are formed in a tapered shape narrower from the upper end to the lower end and are brought into close contact with each other, the airtight structure between the two can be maintained extremely well. . In addition, the airtight structure eliminates the need for a clearance adjustment plate member when the outer frame 2A is used as a jig in assembling the lid 4.

In the first embodiment shown in FIGS. 1 to 10, the outer frame 2 and the inner frame 3 are
In the same manner as in the embodiment shown in FIG. Conversely, the outer frame 2A and the inner frame 3A in the embodiment shown in FIGS. 17 and 18 may be formed by a frame member without a taper.

[0061]

As described above, since the present invention is configured as described above, the following excellent effects can be obtained.

(1) According to the first aspect of the present invention, one of the inner frame member and the corner connecting member has an elongated hole formed along the longitudinal direction of the inner frame member, and the other has an elongated hole formed in the elongated hole. Since the engagement protrusions are formed so as to slidably engage with each other, when the engagement protrusions are engaged with the elongated holes, the inner frame material is slid along the corner coupling members to expand the entire inner frame. After inserting the cover plate material from the surface direction into the inner frame with the inner frame expanded, the inner frame is reduced and the peripheral edge of the cover plate material is inserted into the mounting groove in the inner frame member, By fixing the inner frame member and the cover plate member with the fixing member, the cover body can be easily and reliably assembled, and the assembling work on site can be simplified.

(2) According to the second aspect of the invention, since the outer frame and the inner frame are formed in a tapered shape narrower from the upper end to the lower end, there is no gap between the outer frame and the inner frame. ,
It can be assembled with the inner frame close to the outer frame,
The airtight structure can be made more reliable.

(3) According to the third aspect of the present invention, the cover can be formed based on the outer frame by having the expanding step, the temporary assembling step, the positioning step, and the assembling step. Unlike the technology, the dimensional deviation of the lid does not occur, and the lid can be accurately and easily assembled to the outer frame. In this case, by using the plate member for clearance adjustment, the lid can be accurately assembled to the outer frame with a certain gap, and there is an effect that efficient assembly can be performed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of an embodiment of a floor inspection port according to the present invention.

FIG. 2 is a longitudinal sectional side view showing an engagement state between an inner frame member of the inner frame and a corner connecting member according to the present invention.

FIG. 3 is an exploded perspective view showing an inner frame member and a corner connecting member of the inner frame.

FIG. 4 is an exploded perspective view seen from above when a cover plate material is put into a mounting groove of the inner frame material and temporarily assembled.

FIG. 5 is a perspective view of an inverted state when a cover is formed by tightening a wood screw from the inner frame member to the cover plate member.

FIG. 6 is a longitudinal sectional view (a) showing a state where a floor inspection opening is installed in an opening of a floor, and a sectional view (b) thereof along the line AA.

FIGS. 7A and 7B are explanatory views when a reinforcing material is attached to the inner frame material, and are perspective views showing a relationship between a step edge of the inner frame material and the reinforcing material, and FIG. It is a perspective view (b) which shows the state where the reinforcing material was inserted in the edge.

FIG. 8 is a schematic plan view showing the entire floor inspection port.

FIG. 9 is a longitudinal sectional view showing the entire floor inspection opening.

FIG. 10 is a cross-sectional perspective view showing a relationship between the inner frame member and a packing mounted on the inner frame member.

FIG. 11 is a cutaway plan view showing a gap between the inner frame and the outer frame when the lid is assembled in the outer frame.

FIG. 12 is a longitudinal sectional view of a main part showing a state where a lid is fitted to the outer frame via a plate member for clearance adjustment.

FIGS. 13A and 13B are a broken plan view showing a state in which the clearance adjusting plate member is inserted between the outer frame and the lid, and a perspective view showing the clearance adjusting plate member. FIGS.

FIG. 14 is a cutaway plan view (a) showing a state where another plate member for clearance adjustment is used and the plate member is inserted between the outer frame and the lid, and a perspective view showing the plate member for clearance adjustment ( b).

FIG. 15 is a vertical cross-sectional side view of a modification of the embodiment of the floor inspection opening, in which an elongated hole is provided in the inner frame member and an engaging projection is provided in the corner connecting member.

FIG. 16 is a vertical cross-sectional side view of another modification of the embodiment of the floor inspection port, when the inner frame member and the cover plate member are fastened and fixed from the side.

FIG. 17 shows another embodiment of the floor inspection opening of the present invention,
It is a longitudinal cross-sectional view which shows the installation state at the time of forming an outer frame and an inner frame into a taper shape.

18 is a cutaway plan view showing a state where the lid is assembled in the outer frame in FIG. 17;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor inspection opening 2 Outer frame 3 Inner frame 4 Lid 5 Opening 7A, 7B Wood screw (fixing member) 8 Handle 9A, 9B Packing 11, 11A Clearance adjustment plate member 31, 31A Inner frame material 31c Mounting groove 31k Elongated hole 32 provided in frame material 32 Corner piece (corner connecting member) 32a Elongated hole provided in corner piece 32b Engagement projection provided on corner piece 34 Engagement projection provided on inner frame material F Floor

Claims (4)

[Claims] 1. An outer frame mounted in a substantially rectangular opening provided on a floor, an inner frame detachably fitted in the outer frame, and the inner frame mounted on a peripheral edge of a cover plate. A floor inspection opening provided with an opening / closing lid body, wherein the inner frame has four inner frame members having mounting grooves into which edges of the lid plate can be inserted, and adjacent inner frame members. A corner connecting member slidably coupled in the longitudinal direction of the inner frame material, and a long hole along the longitudinal direction of the inner frame material is formed in one of the inner frame material and the corner connecting member. The other has an engagement projection slidably engaged in the elongated hole, the engagement projection is slidable in the elongated hole, and the engagement projection is provided in the mounting groove of each of the inner frame members. The floor inspection, wherein the inner frame material and the cover plate are fixed with the fixing member when the edge of the cover plate is fitted. mouth. 2. The floor inspection port according to claim 1, wherein the outer frame and the inner frame are formed in a tapered shape such that the width of the frame gradually decreases from the upper end to the lower end. mouth. 3. An outer frame mounted in a substantially rectangular opening provided on a floor, an inner frame removably fitted in the outer frame, and an inner frame capable of being temporarily assembled. A method for assembling a floor inspection opening including an opening / closing lid attached to a peripheral edge, wherein at least two of four inner frame members having a mounting groove into which an edge of the lid plate can be inserted. Moving the inner frame to extend the inner frame, placing the lid plate material in the expanded inner frame, and reducing the inner frame to fit the edge of the lid body into the mounting groove of the inner frame material to cover the lid. A temporary assembling step of temporarily assembling the body, a positioning step of fitting the temporarily assembled lid into the outer frame, and positioning a corner between adjacent inner frame materials; Assembling the lid body by fixing the inner frame material and the lid plate material with a fixing member. A method of assembling the inspection port. 4. The method for assembling a floor inspection port according to claim 3, wherein a plate member for adjusting clearance is interposed between the outer frame and the inner frame member in the positioning step. How to assemble the floor inspection opening.