JPH0249304Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a floor hatch installed for accessing electrical wiring, telephone lines, various piping, and drainage channels installed under the floor for maintenance and inspection. Regarding.

[Prior Art] The first conventional floor hatch includes an outer frame with an open center fitted into an opening provided in the floor, and a lid fitted in a drop-in manner into the outer frame.
Some devices have an embedded handle on the lid that can be freely pulled out, and can be detachably attached to the outer frame using this handle.

Further, as a second prior art, there is Utility Application No. 55-159293 by the present applicant, in which a shielding frame having a circular opening in the center is connected to the lower surface of the outer frame via a connecting metal fitting. Fixing fittings are attached to the four circumferential side walls of the outer frame to overlap the connecting fittings and lock them to the joists stretched under the floor, and furthermore, an inner cover is attached to the opening circle, and the inner cover is attached to the peripheral edge. It is configured to be removably fixed to the shielding frame via a mounting piece protruding from the portion.

[Problem to be solved by the invention] However, in the floor hatch of the first prior art, moisture from cleaning the floor leaks from the gap in the handle part etc. to the underfloor, which damages the wiring and causes an electric leakage accident. In floor hatches installed near drainage channels in factories, etc., there has been a problem in that bad odors are exposed through the gaps in the lids.

Further, the floor hatch of the second conventional technology is as follows:
Since each frame member to which the inner cover and outer cover are attached is constituted by a shielding frame and an outer frame that are separate from each other as described above, two frame members are required, and the outer frame is used as a shielding frame. A problem arises in that a connecting member to be connected to the connecting member and a connecting operation are required, and the structure is complicated and the operation is time-consuming. Furthermore, the inner cover has a mounting piece protruding from the periphery that must be fastened to the shielding frame with bolts or nuts, which also requires complicated molding and installation work for the inner cover, which is time-consuming. There is.

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and includes a receiving part protruding from an intermediate height position on the inner surface of a vertically long strip plate, and a receiving part protruding from the inner surface at the lower part. A frame body with a horizontal grounding part is connected in a rectangular shape to form a large-diameter opening hole inside the grounding part, and an upward inner circumferential wall is provided protruding from the periphery of the grounding part. The opening hole is closed by locking the peripheral edge of the lower lid to the inner peripheral wall, and a bar having a required length and a shape in cross section is arranged on the lower lid, and the upper end of the bar is in contact with the lower surface of the receiver. A screw is screwed onto the bottom surface of the bar, and a top cover is mounted above the bar so as to fit inside the frame body and is supported by the top surface of the receiving part. This is what I did.

[Function] The upper cover of the floor hatch is supported and attached to the upper surface of the receiving part protruding from the inner surface of the frame at an intermediate height position, and the lower cover has a required length to be able to come into contact with the lower surface of the receiving part. It is attached between the lower surface of the cross-sectional bar and the inner circumferential wall of the periphery of the grounding portion of the frame. Therefore, the upper and lower lids are supported or mounted within a single frame.

By tightening the screws, the upper end edge of the bar is brought into contact with the lower surface of the receiving portion, and the lower cover is pushed down to completely seal the opening via the gasket.

[Example] In the figure, reference numeral 1 denotes a frame body made of a vertically long strip plate buried flush with the floor surface, and a receiving part 3 is protrudingly provided at an intermediate height position on the inner surface of the four circumferential side walls 2. , a dovetail groove 4 is provided on the upper surface of the receiving part 3, and this dovetail groove 4
The lower surface of the packing 5 is inserted into the hole. moreover,
By providing the grounding part 6 at the lower part of the frame 1, a large-diameter opening hole 7 is formed in the center thereof. and,
Upward inner circumferential walls 8, 8 are erected on the inner edge of the grounding part 6 to form the upper surface of the grounding part 6 in the shape of a horizontal groove. A packing 10 is fitted into a groove 9 formed between the inner circumferential walls 8, 8.

Reference numeral 11 denotes a connecting fitting having an L-shaped plane for joining the corners of the four circumferential side walls 2 of the frame body 1, and uses a band-shaped plate having a deformed cross section in which both the upper and lower ends of the flat plate are bent inwardly. The contact pieces 11a, 11a that maintain an open angle of 90 degrees are integrally formed with an arcuate portion 11b that bulges outward in an arc shape at the joint corner. This connecting fitting 11 has T-shaped protrusions 12 on the upper and lower sides of the outer surface of the four circumferential side walls 2 and at the center, thereby forming holding grooves 13 in two stages, upper and lower. Then, the contact piece 11 is placed in the upper and lower two holding grooves 13.
a, 11a, and screw 1 on the outside of the corresponding piece.
Corresponding piece 11 whose cross section is bent by tightening with 4
Use the elasticity of a to firmly fix it. Even if there is a slight misalignment in the corners of the circumferential edge 2 during this connection, the arcuate portion 11b allows the connection and fixation to be carried out without any problem.

Reference numeral 15 denotes an anchor having a horizontal piece 15a and a vertical piece 15b formed into a bent shape, and is attached by placing the vertical piece 15b on the outside of the peripheral wall 2 and tightening it with screws 16.

Reference numeral 17 denotes a lower lid that closes the opening hole 7. The lower lid 17 is formed by bending its peripheral edge 18 downward, and the peripheral edge 18 is fitted into the groove 9 of the inner peripheral wall 8. to close the opening hole 7. Reference numeral 19 denotes a cross-sectional bar with a required length for fixing the lower cover 17 in a sealed state, and its upper edge is brought into contact with the lower surface of the receiving part 3 by tightening a screw 20 screwed onto the bottom surface of the bar 19. Then, the lower lid 17 is pushed down and completely sealed via the gasket 9.

Reference numeral 21 denotes an upper lid to be mounted inside the frame 1, and a connecting fitting 2 is provided in a holding groove 23 provided on the inner surface of the four circumferential side walls 22, and is an L-shaped flat plate whose upper and lower ends are bent inwardly.
4 are fitted and fixed by tightening with screws 25 to form a rectangular frame-like body. At this time, the four peripheral side walls 22
The side end of the bottom plate 27 is fitted between the flange 26 protruding from the inner lower end of the holding groove 23 and the lower end of the holding groove 23. A pair of embedded handles 28, 28 are provided on the bottom plate 27.
is attached so that it can be freely drawn out, a reinforcing plate 29 is installed, and the inner space of the four circumferential side walls 22 is filled with mortar 30 or the like.

As shown in FIG. 2, the floor hatch constructed in this way is constructed by placing the grounding part 6 of the frame 1 and the horizontal piece 15a of the anchor 15 on the step C of the opening B opened in the floor A, and A flooring material such as mortar 29 is filled into the gap to fix the frame 1.

Further, in the case where the holding groove 13 provided on the outer surface of the peripheral side wall 2 of the frame body 1 is provided upwardly and a stepped portion 31 is formed at the lower part as shown in FIG.
When installing the device in the opening B of the device, even if the stepped portion C has a rough surface and an uneven shape, the device can be installed without any problem.

The upper cover 21 is installed by dropping it onto the frame 1 fixed to the floor A in this way, but when inspecting wiring, piping, etc., the upper cover 21 is lifted and removed from the frame pair 1. Remove it, then loosen the screw 20 and remove the bar 19 and lower cover 1.
7 can be removed to freely go in and out of the floor. Further, after maintenance, inspection, etc. have been completed, the floor hatch is returned to its original closed state by performing the reverse operation.

[Effects of the invention] As described above, the floor hatch of the invention supports and attaches the upper cover or the lower cover at the upper and lower positions sandwiching the receiving part protruding from the inner surface of the single frame at an intermediate height position. This has the advantage that the structure can be simplified, the manufacturing cost can be kept low, and the installation work can be done easily.

In addition, by tightening the screws, the upper end surface of the bar with a U-shaped cross section having the required length is brought into contact with the lower surface of the holder, and by pushing down the lower cover, the lower cover can be easily sealed against the opening hole. In addition, moisture leaking from the gap in the top cover is caught by the bottom cover and collected on the top surface of the grounding part that forms a horizontal concave groove, and bad odors rising from under the floor are blocked by the bottom cover to prevent them from rising and leaking. It can be prevented.

[Brief explanation of the drawing]

The figures relate to an embodiment of the present invention, and Fig. 1 is an exploded perspective view, Fig. 2 is an enlarged longitudinal cross-sectional view of the main part in a state of use, Fig. 3 is a perspective view of the connecting fitting, and Fig. 4 is a partial view. FIG. 5 is an enlarged vertical cross-sectional view of the main part in the construction state with the top cover removed, and FIG. 6 is a perspective view of the main part showing a part of another embodiment in cross section. 1...Frame body, 2...Four peripheral side walls, 3...Receiving part,
6... Grounding part, 7... Opening hole, 8, 8... Inner peripheral wall, 11... Connection fitting, 11b... Arc-shaped part, 1
3...Retaining groove, 17...Lower cover, 19...Bar, 2
0...screw, 21...top cover, 31...stepped section.

Claims (1)

[Claims for Utility Model Registration] 1. A receiving part is provided protrudingly at an intermediate height position on the inner surface of a vertically long strip plate, and a frame body is connected in a rectangular shape with a grounding part provided horizontally on the inner surface at the lower part. By this, an opening hole with a large diameter is formed inside the grounding part, and an upwardly directed inner peripheral wall is provided on the periphery of the grounding part, and the periphery of the lower cover is locked to the inner peripheral wall to form the opening hole. A bar of the required length and shape in cross section is placed on the lower cover so that its upper end can come into contact with the lower surface of the receiver, and a screw is screwed into the bottom of the bar. The floor hatch further includes a top cover that is supported and attached to the top surface of the receiving part so as to fit inside the frame. 2. A floor hatch according to claim 1, in which the planar L-shaped connecting fittings for connecting the corners of the four circumferential walls of the frame are formed of strip plates whose upper and lower ends are bent inward. 3 Utility model registration claim No. 1 in which the corner of the flat L-shaped connecting fitting is formed into an arc shape that bulges outward.
Floor hatch as described in section. 4. The floor hatch according to claim 1, wherein the retaining groove of the connecting fitting is provided at a higher position than the stepped portion provided at the outer lower end of the four peripheral walls of the frame.