JPH0813527A - Steel cover supporter - Google Patents

Abstract

PURPOSE:To easily open a steel cover while obviating its bite even in the case where load is imposed on this cover for a long period of time by getting rid of any movement and vibration in the steel cover, preventing wear and noise in a steel cover supporting part and packing from occurring, and improving the extent of durability in the steel cover and its receiving frame. CONSTITUTION:An inner circumferential taper surface 3 supporting any load on a steel cover 4 in contact with an outer circumferential taper surface 5 of this steel cover 4 and simultaneously preventing any lateral displacement, and a plane receiving part 7 with a horizontal surface 8 supporting the load of the steel cover 4 both are formed in the inner circumferential part of a receiving frame 2. In addition, rubberlike elastic packing 9 in contact with at least a part of a bottom surface 6 of the steel cover 4 is attached to this plane receiving part 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron for fitting and supporting an iron lid at substantially the same height as a road surface by a receiving frame provided at the upper end of a structure such as a buried casing or manhole buried underground. The present invention relates to a lid supporting device.

[0002]

2. Description of the Related Art A laying pipe for supplying water, gas, electricity and the like is buried underground in an urban area or a suburb thereof. A control valve such as a water control valve or a connector or a breaker is appropriately connected to these laid pipes.
It is necessary to operate them on the road surface, perform maintenance and inspection, further protect them and specify their installation locations. For this purpose, structures (buried structures) such as hollow box-type buried casings and manholes are buried underground.

An iron lid receiving frame for fitting and supporting an iron lid is fixed to the upper end of a structure buried underground (embedded structure). It is installed so that it can be opened and closed. In that case, the iron cover receiving frame is buried such that the upper end edge thereof is substantially at the same height as the road surface, and the iron cover is formed so that the upper surface thereof is substantially the same as the road surface. It is supported in the inner diameter part (inside) in the fitted state (closed state). The iron lid is generally attached to the receiving frame via a hinge so as to be openable and closable.

As a structure in which the iron lid is fitted and supported by the inner diameter portion of the receiving frame, in general, a tapered surface (downward inward taper surface) formed on the outer periphery of the iron lid is formed in the inner diameter portion of the receiving frame. Wedge method that closely adheres to the tapered surface in the same direction and flat receiving method that supports the flat bottom surface of the iron lid on the horizontal surface formed on the inner diameter of the receiving frame via the rubber-like elastic packing member Has been done.

[0005]

In the wedge type iron lid supporting device, a load is applied from the upper surface of the iron lid so that the outer peripheral tapered surface of the iron lid bites into the inner peripheral tapered surface of the receiving frame, whereby It is configured to prevent rattling (noise prevention). However, in this wedge method, when the biting between the tapered surfaces is too strong, although it has an excellent noise prevention function, it is difficult to lift and separate the iron lid from the receiving frame, and the iron lid is opened. There is a problem that the work of becomes very difficult. Actually, a special bar or the like is used to open the iron lid, but even if the iron lid is loaded for a long period of time, it may be difficult to open it.

On the other hand, in the case of the flat supporting type iron lid supporting device, there is no problem that the iron lid is difficult to open, but the flat receiving part (moves or vibrates by the vehicle traveling on the road surface). There are problems such as wear of the packing), generation of impact noise and noise, and shortening of the life of the iron lid and the receiving frame.

The present invention has been made in view of the above technical problems, and an object of the present invention is to prevent movement and vibration of the iron lid and prevent wear and noise of the iron lid support and packing. It is possible to extend the life of the iron lid and the receiving frame, and even if the iron lid is loaded for a long period of time, it is possible to prevent the iron lid from biting and easily open the iron lid. An object is to provide a lid support device.

[0008]

DISCLOSURE OF THE INVENTION The present invention is an iron lid supporting device for supporting an iron lid inside a receiving frame provided at an upper end of a structure buried underground, wherein an inner peripheral portion of the receiving frame is provided. An inner peripheral tapered surface that abuts on an outer peripheral tapered surface of the iron lid to support the load of the iron lid and prevents lateral displacement, and a flat receiving portion having a horizontal surface that supports the load of the iron lid are formed. The above object is achieved by adopting a structure in which a packing of a rubber-like elastic body that is in contact with at least a part of the bottom surface of the iron lid is attached to the portion to transmit the load of the iron lid.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a state of an iron lid supporting device to which the present invention is applied with an iron lid, and FIG. 2 is a plan view showing a state of the iron lid supporting device of FIG. 1 without an iron lid. 1 is a vertical sectional view taken along line 3-3 in FIG. 1, and FIG. 4 is line 4 in FIG.
FIG. 4 is a vertical sectional view taken along line -4. 1 to 4, in the upper end surface of the buried structure 1 such as a cylindrical water control valve casing and a manhole buried underground, a ring-shaped (a square ring in the illustrated example) receiving frame having a central opening is formed. 2 is provided, and an iron lid 4 having the same shape (square shape) in the opening of the receiving frame 2
Are fitted and supported. The receiving frame 2 and the iron lid 4
Are usually made of castings such as ductile cast iron.

The iron lid 4 is part of the peripheral edge (one side).
In the above, it is attached to the receiving frame 2 via a link mechanism 10 so as to be openable and closable. In the illustrated example, the link mechanism 10 is provided at two places with a predetermined interval. In each link mechanism 10, one end of the arm 11 is rotatably pin-coupled to the receiving frame 2 and one end of the arm 12 is rotatably pin-coupled to the iron lid 4, and the other ends of the arms 11 and 12 are coupled. The iron lids 4 are openably and closably connected to each other by rotatably pin-joining each other.

FIG. 5 is a partial vertical sectional view taken along line 5-5 in FIG. 1, and FIG. 6 is a partial sectional view taken along line 6-6 in FIG. 1 to 6, an outer peripheral taper surface 5 is formed on the outer peripheral portion (outer peripheral surface) of the iron lid 4 and is inclined downward inward, while the inner peripheral portion of the opening of the receiving frame 2 ( Also on the inner peripheral surface), an inner peripheral tapered surface 3 inclined in the same direction (downward inward) as the outer peripheral tapered surface 5 is formed. The tapered surface 3 of the receiving frame 2 and the tapered surface 5 of the iron lid 4 are
When the iron lid 4 is attached to the closed position, the iron lid 4 and the iron lid 4 are in close contact with each other to support the load from the iron lid 4 and prevent lateral displacement (backlash) of the iron lid 4.

The outer peripheral portion of the bottom surface of the iron lid 4 is a flat support surface 6, while the inner peripheral portion of the opening portion of the receiving frame 2 has predetermined positions (in the illustrated example, four corner portions are Flat receiving portions 7 having horizontal surfaces 8 for supporting the load of the iron lid 4 are formed at four positions including the above. A rubber-like elastic packing 9 is attached to each of the flat receiving portions 7. FIG. 7 is a perspective view showing the packing 7 alone. The packing 9 contacts the supporting surface (bottom surface) of the iron lid 4 and transfers the load from the iron lid 4 to the flat receiving portion 7 of the receiving frame 2. As a material for the packing 9, for example, urethane rubber or the like can be used.

According to the above construction, when the iron lid 4 is attached to the opening of the receiving frame 2 (closing the lid), the tapered surfaces 3 and 5 are in close contact with each other and the supporting surface (bottom surface) of the iron lid is attached. ) Is pressed against the packing 9, so that the load from the iron lid 4 (including the weight of the vehicle or placed object on the road surface)
Is partially supported by the tapered surface 3 of the receiving frame 2, and the rest of the load is supported by the flat receiving portion 7 through the packing 9, and the iron lid 5 moves due to the close contact of the tapered surfaces 3 and 5. Not supported in a completely restrained state. In this case, the load sharing ratio between the tapered surface 3 and the flat receiving portion 7 is set to a desired value in consideration of the shape dimensions of the fitting support portions of the receiving frame 2 and the iron lid 4, the thickness and hardness of the packing 9, and the like. It is possible to select, for example, about 5: 5.

According to the embodiment described above, the inner peripheral taper of the receiving frame 2 is in contact with the outer peripheral taper surface 5 of the iron lid 4 to support the load of the iron lid and prevent lateral displacement. The surface 3 and the flat receiving portion 7 having a horizontal surface 8 for supporting the load of the iron lid 4 are formed, and the flat receiving portion 7 has a bottom surface 6 of the iron lid 4.
Since a packing 9 made of a rubber-like elastic material is attached to contact at least a part of the iron lid to transmit the load of the iron lid, the wedge effect of the tapered surfaces 3 and 5 eliminates the movement and vibration of the iron lid 4 to eliminate the iron lid. It is possible to prevent the wear of the support portion and the packing and the generation of noise, improve the durability of the iron lid 4 and the receiving frame 2, and even when the iron lid 4 is loaded for a long period of time. Since the load is distributed to the tapered surface supporting portions 3 and 5 and the flat receiving portion 7, it is possible to prevent the iron lid 4 from excessively biting into the receiving frame 2 and to easily open the iron lid 4. A support device is provided.

In the above-described embodiment, the case where the iron lid 4 is a quadrangle has been described as an example. However, in the present invention, the iron lid 4 may have a circular shape (including an ellipse or an ellipse) or a polygonal shape. The same can be applied to the case of the shape, and the same effect can be obtained. Further, in the above-mentioned embodiment, the flat receiving portion 7 and the packing 9 are arranged at each corner portion of the inner peripheral portion of the receiving frame 2, but this may be arranged on the entire inner peripheral portion, or other It may be partially arranged at the position. Also, the cross-sectional shape of the packing 9 is not limited to that of the above-described embodiment, but may have various shapes, and may be fixed to the flat receiving portion 7 by adhesion or the like, if necessary.

[0016]

As is apparent from the above description, according to the present invention, in the iron lid supporting device for supporting the iron lid inside the receiving frame provided at the upper end of the structure buried underground, An inner peripheral tapered surface that abuts an outer peripheral tapered surface of the iron lid to support the load of the iron lid and prevents lateral displacement, and a flat receiving portion having a horizontal surface that supports the load of the iron lid, on the inner peripheral portion of the frame. Since the flat receiving portion is provided with a rubber-like elastic packing that abuts at least a part of the bottom surface of the iron lid to transmit the load of the iron lid, the movement and vibration of the iron lid are prevented. To prevent wear and noise from the iron lid support and packing, extend the life of the iron lid and the receiving frame, and load the iron lid for a long period of time. But the iron that can easily open the iron lid Support apparatus is provided.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a receiving frame and an iron lid in which an iron lid supporting device according to the present invention is implemented.

FIG. 2 is a plan view of the receiving frame with the iron lid removed from FIG.

FIG. 3 is a longitudinal sectional view taken along line 3-3 in FIG.

4 is a vertical cross-sectional view taken along the line 4-4 in FIG.

5 is a partial vertical cross-sectional view taken along the line 5-5 in FIG.

6 is a partial vertical cross-sectional view taken along the line 6-6 in FIG.

7 is a perspective view of the packing in FIGS. 5 and 6. FIG.

[Explanation of symbols]

 1 Embedded Structure 2 Receiving Frame 3 Tapered Surface (Receiving Frame) 4 Iron Lid 5 Tapered Surface (Iron Lid) 6 Supporting Surface (Iron Lid Bottom) 7 Flat Receptor 8 Horizontal Surface 9 Packing

Claims (1)

[Claims] 1. An iron lid support device for supporting an iron lid inside a receiving frame provided at an upper end of a structure buried underground, wherein an inner peripheral portion of the receiving frame has an outer peripheral tapered surface. An inner peripheral tapered surface that abuts and supports the load of the iron lid and prevents lateral displacement, and a flat receiving portion having a horizontal surface that supports the load of the iron lid are formed, and the flat receiving portion has a bottom surface of the iron lid. An iron lid support device, characterized in that a rubber-like elastic packing for contacting at least a part of the iron lid and transmitting the load of the iron lid is attached.