JPH0242817Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to a floor hatch installed at various inspection openings on the floor of a building, etc., and particularly relates to a square floor hatch in which mortar or the like is filled into the recess on the top surface of the lid. .

[Technical background of the invention and its problems]

In general, this type of filling floor hatch has a quadrilateral outer frame that is fitted and fixed into an opening in the floor, and a cross-sectional shape that is filled with mortar etc. in a recessed part of the upper surface and is removable within the outer frame. The outer frame and the inner frame of the lid are made of extruded aluminum or the like and are framed in a quadrilateral shape. By the way, the frame structure, especially the frame structure of the outer frame, is simply a matter of attaching and fastening angle-shaped corner pieces, and it is difficult to achieve perpendicularity between the frame members.
It was difficult to obtain an accurate quadrilateral shape, the assembly was troublesome, and the structure was weak in strength and easily deformed, which caused the problem of looseness between the outer frame and the lid.

[Purpose of invention]

This idea was created in view of the above circumstances, and the purpose is to provide an extremely superior floor hatch that allows easy and reliable assembly of the outer frame, is strong, and does not cause undue deformation or rattling. .

[Summary of the idea]

In order to achieve the above object, the floor hatch of this invention is screwed to the lower surface of both bottom walls of each butting corner of four outer frame members made of extruded material such as aluminum. Corner fastening fittings each having a folded piece portion that embraces the outer lower edges of adjacent outer frame members are provided, and the respective outer frame members are securely fastened to each other by the corner fastening fittings to prevent deformation. This is to eliminate any wobbling or rattling.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 1 to 5. In the figure, 10 is a rectangular quadrilateral outer frame, and 30 is a lid that is removably fitted to the outer frame 1.

The outer frame 10 is mainly composed of four outer frame members 11 made of extruded aluminum members, and is framed in a quadrilateral shape by butting their ends together. In other words, each outer frame member 11 of this outer frame 10 is an extruded member having a substantially L-shaped cross section as shown in FIG. A bottom wall 13 extending substantially horizontally to
The rising wall 12 has a joint support plate engaging groove 12a and a joint engaging step portion 12 on the outer surface of the upper part thereof.
b is formed, and a corner piece, an anchor mounting groove 12c, and a screw receiving portion 12d are formed on the lower side thereof. Further, a screw hole 13a is formed on the lower surface of the bottom wall 13, a small rising edge 13b is formed on the inner edge of the bottom wall 13, vertically perpendicular to the bottom, and an inverted L edge is formed on the outer edge of the bottom wall 13. A curved edge portion 13c is formed, and an L-shaped step portion 13d is formed above the bent edge portion 13c.

The ends of each of these outer frame members 11 are cut at 45 degrees and abutted against each other at right angles to form a rectangular quadrilateral shape. As a means for connecting the outer frame members 11 to each other, corner fastening fittings 14 are provided on the lower surface side of each corner portion (four corner portions) where the ends of the outer frame members 11 are abutted against each other.
This corner fastening fitting 14 is made by cutting a relatively thick plate made of stainless steel or the like into a rectangular shape as shown in FIG.
a, and U-shaped folded portions 14b are formed on two adjacent outer sides, and as shown in FIGS. 3 and 4, the bottom walls of adjacent outer frame members 11 at each of the four corners are 13 is fixed on the lower surface side with a plurality of screws 15, and the folded portions 1 on both outer sides
4b is the outer bent edge 1 of the bottom wall 13 of both outer frame members 11
3c, so as to engage with the upper L-shaped stepped portion 13d of the outer frame member 3c, thereby fastening the two outer frame members 11 together at right angles. A square nut 16 is welded and fixed to the upper surface of the inner corner of this corner fastening fitting 14.

Additionally, an outer frame corner piece 17 is provided as a means for connecting the outer frame members 11 to each other. Each of the outer frame corner pieces 17 has an angle shape made by bending a single strip plate at right angles, and is engaged with the outer mounting grooves 12c of the rising side walls 12 of both adjacent outer frame members 11. , are fastened by a plurality of screws 18.

Note that the rising side wall 1 of each outer frame member 11 of the outer frame 10
There is a joint 1 in the joint engaging stepped portion 12b on the outer side of No. 2.
9 is fixed by tightening with a screw 21 to a mounting plate 20 that is engaged in an inner engagement groove 12a. This joint 19 is a stainless steel band plate, and is fixed over the entire longitudinal direction in a state in which it protrudes above the rising wall 12 of each outer frame member 11 by a predetermined height.

Such an outer frame 10 is attached by engaging an anchor 23 with a screw 22 in the middle of the mounting groove 12c on the outer surface of the rising wall 12 of each outer frame member 11, and attaching it to an inspection opening (not shown) in the floor of a building, etc. It is designed to be embedded and fixed in the periphery of the opening.

Next, the lid body 30 includes four inner frame members 31 that are assembled into a quadrilateral shape with their ends butted against each other.
and a bottom plate 34 consisting of a single rectangular plate, and are configured in a cross-sectional shape, and the recessed portion of the upper surface is filled with mortar, polished with terrazzo, or pasted with magnetic tiles, mosaic tiles, clinker tiles, etc. (not shown). It is removably fitted into the outer frame 10.

As shown in FIG. 4, the four inner frame members 31 have a rising side wall 32 that slopes slightly outward, and a bottom wall 33 that is integrally connected to the lower end and extends horizontally inward.
A corner piece engaging groove 32a is formed on the inner surface near the upper end of the rising wall 32, and a lip groove-shaped packing is fitted on the lower surface of the bottom wall 33. Matching groove 3
3a is formed.

The ends of each of these inner frame members 31 are cut at 45 degrees and abutted against each other at right angles to form a rectangular quadrilateral shape. As a means for connecting the outer frame members 11 to each other, the bottom plate 34 is fixed to the upper surface of the bottom wall 33 by fixing its peripheral edge with a plurality of screws 35, and the riser of the adjacent inner frame members 31 is fixed to the upper surface of the bottom wall 33. An angular inner frame corner piece 36 similar to the above is attached to the inner corner piece engagement groove 32a of the side walls 32 with a countersunk head screw 37, and the inner frames 31 are connected to each other by the bottom plate 34 and the corner pieces 36 at the four corners. are fastened at right angles.

Inner frame member 31 framed in such a quadrilateral shape
A stainless steel joint 38 having a C-shaped cross section is fitted to the upper end of each rising side wall 32, and is fitted over the entire longitudinal direction, and a gasket fitting on the lower surface of the bottom wall 33 of each inner frame member 31 is attached. A waterproof gasket 39 is press-fitted into the matching groove 33a to press onto the inner peripheral rising edge 13a of the bottom wall 13 of the outer frame member 11 of the outer frame 10.

Further, lock covers 41 are attached to the four corners of the inner periphery of the lid body 30, respectively, by being fastened to the upper surface of the bottom plate 34 with a plurality of screws 40.
Each of the lock covers 41 is a cast product having a bottomed cylindrical shape with quadrilateral upper and lower ends and a constricted middle, and has a large-diameter stepped portion 41a formed at the upper end of the opening, and is screwed into the upper half of the inner circumferential surface. A portion 41b is carved, and a bolt insertion hole 41c is formed at the bottom of the lower end. Then, hexagonal hole tightening bolts 42 are inserted into the interior from above and can be screwed into the nuts 16 at the four corners of the outer frame 10. Further, a screw plug 44 is screwed into the large diameter portion 41a at the upper end of the opening of each lock cover 41 through a packing 43 to close the opening from above.

Reference numeral 45 in FIGS. 1 and 2 denotes a reinforcing member having a hat-shaped cross section and long welded to the center of the upper surface of the bottom plate 43 of the lid 30.

Therefore, in the floor hatch with the above-mentioned configuration,
Each outer frame member 11 of the outer frame 10 is connected to the corner fastening fitting 14 and corner piece 17 shown in FIG. 5 above.
As a result, the inner frame members 31 of the lid body 30 are easily and securely connected to each other by the bottom plate 34 and the corner pieces 36, and are framed in an accurate four-sided shape, thereby preventing unnecessary deformation or wobbling. . In addition, the lock cover 4 is attached to the nut 16 on each corner fastening fitting 14 in the outer frame 10.
By screwing and tightening the tightening bolts 42 through 1, the four corners of the lid 30 can be tightened and fixed to the outer frame 10, and the waterproof gasket 39 is securely pressed onto the inner rising portion 13b of the outer frame 10. This makes it completely waterproof.

In addition, when opening the lid 30, use a tool to unscrew each screw plug 44 screwed into the lock cover 41 at the four corners, and then insert a hexagon spanner or the like into each lock cover 41 to tighten it. Remove bolt 42. In this way, the lid body 30 is removed upward from the outer frame 10. At this time, a lifting device (not shown) such as a hook is screwed into the lock cover 41 at the appropriate position as a substitute for the screw plug 44, and the lid body 3 is
Make sure to remove 0.

Figure 6 shows a modification of the lock cover.
As a substitute for the lock cover 41 of the above cast article,
The lock cover 51 shown here is assembled by welding press-stamped upper and lower stainless steel flange plates 52 and 53, a hexagonal nut 54, and a tube body 55, and can be attached to the lid in the same manner as above. It can be used. In this case, the flange plate 52 exposed on the top surface is made of stainless steel like the joints 18 of the outer frame 10 and the joints 38 of the inner frame of the lid body 30, so that the appearance is improved.

[Effect of idea]

Since this invention has been developed as described above, the outer frame can be assembled easily and reliably, and is strong and free from unnecessary deformation and wobbling, resulting in an extremely excellent floor hatch.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of this invention, with Figure 1 being a partially omitted plan view, Figure 2 being a partially sectional side view, and Figure 3 being A of Figure 1. FIG. 4 is a sectional view taken along the - line in FIG. 3, FIG. 5 is a perspective view of a corner fastening fitting, and FIG. 6 is a sectional view showing a modification of the lock cover. DESCRIPTION OF SYMBOLS 10...Outer frame, 11...Outer frame member, 12...Rising side wall, 13...Bottom wall, 14...Corner fastening fitting, 14b...Folded portion, 15...Screw, 16
... Nut part, 17 ... Corner piece for outer frame,
30...Lid body, 31...Inner frame member, 42...Tightening bolt.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The outer frame is formed into a quadrilateral shape by framing four outer frame members made of extruded materials such as aluminum, and is fitted and fixed into the opening of the floor, and the mortar is placed in the recessed part of the upper surface. In a floor hatch consisting of a lid body which is filled with the above-mentioned materials and removably fitted into the outer frame, a screw is installed on the lower surface side of both bottom walls of each butt corner of each of the outer frame members at the four corners of the outer frame. 1. A floor hatch, characterized in that each corner fastening metal fitting is provided with a folded piece portion that is fastened and embraces the outer lower edges of adjacent outer frame members. (2) The corner fasteners have nut parts that extend inside the outer frame, and by screwing tightening bolts into the nuts of each corner fastener, the lid can be attached to the outer frame at the four corners. The floor hatch according to claim 1, which is characterized in that it is configured to be tightened and fixed.