JPH0135865Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a closing device, usually called a floor hatch, for closing floor openings such as manholes.

(Prior Art) Conventionally, as a device for closing floor openings such as manholes, a rectangular outer frame is buried around the floor opening, and a lid body is fitted and supported within the outer frame. This lid body includes a frame body surrounding the outer periphery of the lid body, and
It is widely known that the device is composed of a bottom plate, a handle attached to the bottom plate, and a filler filled on the bottom plate inside the frame.

(Problem that the invention aims to solve) However, the outer frame and lid are made into a rectangular shape by arranging the shapes and plates that form the walls of the frame on all sides and directly arc welding the opposing ends to each other. Therefore, there are problems in that it is difficult to assemble and form a rectangular frame with high precision, and manufacturing requires time and skill.

For this purpose, for example, as described in Japanese Utility Model Publication No. 49-35941, a locking portion having a U-shaped cross section is provided on the frame wall, and a corner plate is fitted into this locking portion. After fitting the protruding protrusion into the hole provided on the frame surface adjacent at right angles,
Although assembly into a rectangular shape is done by caulking, it is difficult to fit the corner plate into the U-shaped locking part of the frame wall and to fit the protrusion into the hole during manufacturing. Not only is productivity bad, but if such a connection structure is adopted between the outer frame and the inner frame, there will be a caulking part of the protrusion between the two frames, which will require an extra gap.
As a result, there is a problem in that the inner frame rattles and the caulked portions contact or lock each other, making it impossible to open and close smoothly.

The purpose of the present invention is to solve these problems and provide a closing device for a floor opening that can be assembled accurately and easily, and allows the lid to be opened and closed smoothly. be.

(Means for Solving the Problems) In order to achieve the above object, the floor opening closing device of the present invention is installed around the opening 2 of the wall 1 as shown in the drawings corresponding to the embodiments. a rectangular outer frame 3, and a lid body 4 that is fitted and supported within the outer frame 3.
The lid body 4 has a frame body 5 surrounding its outer periphery.
In the floor opening closing device comprising a bottom plate 6 and a handle 7 attached to the bottom plate 6, the outer frame 3 has a flat portion 13a of an appropriate width facing outward at the upper end thereof. Reinforcement piece 13 downward from the free end
b is extended, and a concave portion 17 with a rectangular cross section is formed at an intermediate position in the height direction outwardly and recessed by an amount equivalent to the plate thickness of the L-shaped metal fitting 14, and a frame support flat portion 13c is formed at the lower end inside. A bent plate material 1 formed by providing a reinforcing piece 13d facing upward from the free end thereof.
3 are arranged on all sides, and the connecting ends of these bent plate materials 13 are butted together, and the adjacent concave portions 17, 17 at both the butted connecting ends are
is formed into a rectangular shape by inserting the L-shaped metal fitting 14 and connecting the L-shaped metal fitting 14 and the two concave portions 17, 17 by spot welding. The body 5 has a flat part 15a of an appropriate width facing inward at the upper end, and a reinforcing piece 15b extends downward from the free end thereof, and extends inward at an intermediate position in the height direction to match the plate thickness of the L-shaped metal fitting 14. Forming a concave portion 18 having a rectangular cross section and recessing by a considerable amount,
A reinforcing piece 15 is provided with a flat part 15c of an appropriate width facing inward at the lower end and extends upward on the free end side thereof.
The bent plate materials 15 formed with the bottom plate mounting portions 15e extending inward through d are arranged on all sides, and the connecting ends of these bent plate materials 15 are butted against each other, and both connecting ends are abutted against each other. The L-shaped fitting 14 is fitted into the adjacent concave portions 18, 18, and the L-shaped fitting 14 and both concave portions 18, 18 are connected to each other.
A rectangular shape is formed by connecting them by spot welding.Furthermore, the outer periphery of the lower surface of the floor plate 6 is fixed to the floor plate mounting portion 15e of the frame 5, and a surrounding cylinder is formed at the center of the upper surface of the floor plate 6. 9 is fixed, and the grip part storage recess 2 of the handle 7 is placed in the upper end opening of the surrounding cylinder 9.
A planar rectangular support frame 10 having a diameter of 0 is fitted, and the flange portion 10a of the support frame 10 is fixed to the upper opening edge of the surrounding cylinder 9, and both ends of the grip portion 11 of the handle 7 stored in the storage recess 20 are fitted. The vertical rod part 12a of the U-shaped engagement frame 12 whose upper end is integrally attached to the hole 19, 19 is formed on both sides of the bottom of the storage recess 20.
The lower end horizontal rod portion 12b of the U-shaped engagement frame 12 is brought into contact with the outer bottom surface of the storage recess 20 when the handle 7 is lifted up. The space between the outer peripheral surface and the inner peripheral surface of the frame body 5 is filled with a filler 8.

(Function) Each bent plate material 13 forming the frame wall of the outer frame 3 includes:
Since a concave portion 17 having a rectangular cross section is formed at an intermediate position in the height direction, the concave portion 17 recesses outward by an amount corresponding to the plate thickness of the L-shaped metal fitting 14, so that this bent plate material 13
When forming a frame by arranging L-shaped fittings 14 on all sides to form a frame, the L-shaped metal fittings 14 can be easily and accurately inserted between the concave portions 17, 17 of adjacent bent plate materials 13, and spot welding can be performed. A good rectangular outer frame 3 can be formed efficiently, and the same can be said of the frame 5 of the lid 4.

Therefore, no extra gap is created between the outer frame 3 and the lid 4, and opening and closing operations can be performed smoothly.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.A rectangular outer frame 3 is embedded around the opening 2 of the floor surface 1, and a lid body 4 is placed inside the outer frame 3. Fitted and supported. The upper end surfaces of these outer frame 3 and lid body 4 are flush with floor surface 1.

As shown in FIGS. 2 and 3, the lid 4 includes a frame 5 surrounding the outer periphery, a bottom plate 6, a handle 7 attached to the bottom plate 6, and a handle 7 on the bottom plate 6 inside the frame 5. The space is filled with a filler 8. The handle 7 has a rectangular grip part 11 with the upper ends of a U-shaped engagement frame 12 integrally attached to both ends thereof, and a rectangular planar grip part 11 with the grip part 11 attached to the upper opening of the surrounding cylinder 9. It is housed in a recess 20 of the support frame 10.

This support frame 10 has a grip part storage recess 2 of the handle 7.
0 is fitted into the upper end opening of the surrounding cylinder 9, and the upper end flange portion 10a is fixed to the upper end opening edge of the surrounding cylinder 9. Furthermore, holes 19, 19 are bored on both sides of the bottom of the storage recess 20. When the vertical rod portion 12a of the U-shaped engagement frame 12 of the handle 7 is inserted vertically and the handle 7 is lifted, the lower end horizontal rod portion 12b of the U-shaped engagement frame 12 is inserted into the storage recess 16. It is made to come into contact with the outer bottom surface.

As shown in FIG. 4, the outer frame 3 has an upper end bent outward in an L-shape to form a flat part 13a of an appropriate width.
A reinforcing piece 13b extends downward from the free end of the flat part 13a, and has a rectangular cross section that is recessed outward by an amount equivalent to the plate thickness of the L-shaped fitting 14 at an intermediate position in the height direction. A bent plate member 13 is provided on all sides, in which a concave portion 17 is formed, a supporting flat portion 13c of the frame body 5 is provided at the lower end facing inward, and reinforcing pieces 13d extend upward from the free end thereof. The two ends cut at an angle of 45 degrees when viewed from the plane of the bent plate material 13 are butted against each other to form a rectangular shape, and the adjacent concave portions 17, 17 at the butted connection ends are formed as shown in FIG. Insert the L-shaped metal fitting 14 as shown, and this L-shaped metal fitting 14
and the two concave portions 17, 17 are connected by spot welding to form a rectangular shape.

The upper end of the frame 5 of the lid 4 is bent inward into an L-shape to form a flat part 15a of an appropriate width, and a reinforcing piece 15b extends downward from the free end. A recessed part 18 with a rectangular cross section is formed at an intermediate position in the height direction and recessed inward by an amount equivalent to the plate thickness of the L-shaped metal fitting 14, and a flat part 15c of an appropriate width is formed at the lower end in the same way as the upper end. The bent plates 15 are arranged on all sides and have a bottom plate mounting portion 15e extending inwardly through a reinforcing piece 15d extending upwardly from the free end thereof.
The ends cut at an angle of 45 degrees when viewed from the plane of No. 5 are butted against each other to form a rectangular shape, and the L-shaped metal fittings 14 are fitted into the adjacent recesses 18, 18 at the butted connection ends. It is formed into a rectangular shape by spot welding and connecting the L-shaped metal fitting 14 of the lever and the two concave portions 18, 18.

A floor plate 6 is placed on the floor plate mounting portion 15e of the frame 5, and the outer circumferential portion of the lower surface thereof is fixed with a stopper 16, and the enclosure tube 9 is fixed to the center portion of the upper surface of the floor plate 6 as described above. , the lid body 4 is formed by attaching the handle 7 to the upper end of the surrounding cylinder 9 and filling the space between the outer peripheral surface of the surrounding cylinder 9 and the inner peripheral surface of the frame body 5 with a filler 8. It is.

The bent plate materials 13 and 15 can be easily formed from a flat plate into the respective cross-sectional shapes by forming the plate materials.

Note that the L-shaped member 14 attached to the outer frame 3 may also be fixed in contact with the outer surface of the concave portion 17, as shown by the imaginary line.

(Effect of the invention) As described above, according to the floor opening closing device of the present invention, each of the bent plate materials 13 and 15 forming the frame wall of the outer frame 3 and the frame 5 of the lid body 4 has the following features: Since concave portions 17 and 18 having a rectangular cross section are formed at intermediate positions in the height direction, the concave portions 17 and 18 are recessed toward the outside and inside by an amount equivalent to the thickness of the L-shaped metal fitting 14, so that the bent plate material 13, 15 are arranged on all sides to form a frame, the L-shaped metal fittings 14 are placed between the concave portions 17, 17 or between 18, 18 of adjacent bent plate materials 13, 13 or 15, 15.
The rectangular outer frame 3 and lid body 4 can be easily and accurately inserted, and spot welding can be performed smoothly while preventing the adjacent bent plate material 13 or 15 from moving by the L-shaped metal fitting 14. It can be formed efficiently.

Furthermore, the strength of the connection between adjacent bent plates 13, 13 or 15, 15 is increased by spot welding the L-shaped metal fittings 14, allowing for long-term use without distortion or bending. In addition, since the L-shaped fitting 14 is housed in the recessed parts 17 and 18 of the bent plates 13 and 15, there is no extra gap between the outer frame 3 and the lid 4, and the opposite Since the surfaces are flat and parallel, the lid body 4 can be opened and closed smoothly without rattling or getting caught.

In addition, in the lid body 4, the outer periphery of the lower surface of the floor plate 6 is fixed to the floor plate mounting portion 15e of the frame body 5, and a surrounding cylinder 9 is fixed to the central part of the upper surface of the floor plate 6, and the upper end of the surrounding cylinder 9 is opened. There is a recess 20 for storing the grip part of the handle 7 inside the part.
A support frame 10 having a planar rectangular shape is fitted, and the flange portion 10a of the support frame 10 is fixed to the upper opening edge of the surrounding cylinder 9, and both ends of the grip portion 11 of the handle 7 housed in the storage recess 20. When the vertical rod part 12a of the U-shaped engagement frame 12, whose upper end is integrally attached to the housing recess 20, is inserted into the holes 19, 19 formed on both sides of the bottom of the storage recess 20 so as to be vertically movable, and when the handle 7 is lifted. Since the lower end horizontal rod portion 12b of the U-shaped engagement frame 12 is brought into contact with the outer bottom surface of the storage recess 20, not only the mounting structure of the handle 7 is simple, but also the recess of the support frame 10 The lid body 4 can be opened in a stable state by pulling out the grip part 11 of the handle 7 housed in the housing 20, and furthermore, the enclosure cylinder 9 to which the handle 7 is attached is fixed to the bottom plate 6 of the lid body 4. Therefore, the weight of the lid body 4 can be lifted through the bottom plate 6, resulting in a structure with stable strength.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a perspective view, Fig. 2 is a simplified vertical sectional view, Fig. 3 is a partially cutaway plan view, and Fig. 4 is a diagram showing the relationship between the outer frame and the lid body. FIG. 5 is an enlarged sectional view of the main part and a perspective view of the L-shaped metal fitting. 1...Wall surface, 2...Opening, 3...Outer frame, 4...
... Lid body, 5 ... Frame body, 6 ... Bottom plate, 7 ... Handle,
9... Surrounding cylinder, 13, 15... Bent plate material, 14...
L-shaped metal fittings, 13a, 15a...Flat part, 13
b, 15b... Reinforcement piece, 13c... Frame support flat part, 13d, 15d... Reinforcement piece, 15e... Bottom plate placement part, 17, 18... Recessed part.

Claims (1)

[Scope of utility model registration request] It consists of a rectangular outer frame 3 embedded around the opening 2 in the floor surface 1, and a lid 4 that is fitted and supported within the outer frame 3, and the lid 4 has a frame 5 surrounding the outer periphery thereof. and,
In the floor opening closing device comprising a bottom plate 6 and a handle 7 attached to the bottom plate 6, the outer frame 3
A flat part 13a of an appropriate width is provided at the upper end facing outward, and a reinforcing piece 13b is extended downward from the free end thereof, and a reinforcing piece 13b is provided at an intermediate position in the height direction and extends outward by an amount equivalent to the plate thickness of the L-shaped fitting 14. A recessed part 17 having a rectangular cross section is formed, and a frame support flat part 1 is formed at the lower end.
3c facing inward and reinforcing pieces 13d extending upward from the free ends of the bent plates 13 are arranged on all sides, and the connecting ends of these bent plates 13 are butted together and abutted. The L-shaped metal fitting 14 is fitted into the adjacent concave portions 17, 17 at both connection ends, and the L-shaped metal fitting 1
4 and the two concave portions 17, 17 are connected by spot welding to form a rectangular shape;
The frame 5 of the lid 4 has a flat part 1 of an appropriate width at the upper end.
5a is provided facing inward, and a reinforcing piece 15b extends downward from the free end thereof, and a recess with a rectangular cross section that extends inward at an intermediate position in the height direction and recesses by an amount equivalent to the plate thickness of the L-shaped metal fitting 14. 18, a flat part 15c of an appropriate width is provided at the lower end facing inward, and a bottom plate mounting part 15e is formed at the free end side thereof, extending inward through a reinforcing piece 15d extending upward. The bent plates 15 are arranged on all sides, and the connecting ends of these bent plates 15 are butted against each other, and the L-shaped metal fittings 14 are fitted into the adjacent recesses 18, 18 at both of the butted connecting ends. This L-shaped metal fitting 14 and the two concave portions 18 are connected by spot welding to form a rectangular shape.
5e, the outer peripheral part of the lower surface of the floor plate 6 is fixed, and a surrounding cylinder 9 is fixed to the center part of the upper surface of the floor plate 6.
A planar rectangular support frame 10 having a recess 20 for storing the grip portion of the handle 7 is fitted into the upper end opening, and the flange 10a of the support frame 10 is fixed to the upper end opening edge of the surrounding cylinder 9, and the storage recess is The vertical rod portions 12a of the U-shaped engagement frame 12, whose upper ends are integrally attached to both ends of the grip portion 11 of the handle 7 housed in the handle 20, are inserted into the holes 19, 19 bored on both sides of the bottom of the storage recess 20. The lower end horizontal rod portion 12b of the U-shaped engagement frame 12 is brought into contact with the outer bottom surface of the storage recess 20 when the handle 7 is lifted up.
A closing device for a floor opening characterized in that the space between the outer circumferential surface of the surrounding tube 9 and the inner circumferential surface of the frame body 5 is filled with a filler 8.