JP2009097178A - Circular lid for underground structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems wherein a body of a circular lid for an underground structure bites a receiving frame excessively, thereby preventing the lid body from being opened, and the lid body is rusted, thereby making the lid opening work difficult. <P>SOLUTION: This circular lid for the underground structure is provided with the circular receiving frame, the lid body opening and closing an opening part in an upper part of the receiving frame, and a hinge connecting the receiving frame with the lid body, and a bar hole is provided at a peripheral fringe opposing to the hinge in the lid body. The uppermost part of the receiving frame is formed into a convex face and the uppermost part of an outer peripheral face of the lid body is formed into a concave face adhering closely and fitted to/into the convex face of the receiving frame so that an angle of a tangential line in the uppermost part of a curve of a contact face where the lid body and the receiving frame are fitted and come into contact mutually becomes 15-30° for the vertical line and an angle of a tangential line of a curve in the lowermost part of the contact face becomes 3-8° for the vertical line. The lid body and the receiving frame adhere closely and are fitted mutually to constitute this circular lid for the underground structure. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a circular lid for an underground structure, in which a circular lid body and a receiving frame that supports the lid body on an upper inner peripheral surface are connected by a hinge.

  As shown in FIG. 1, the conventional circular lid for an underground structure has the same inclination angle of 5 ° to 10 ° with respect to the vertical plane on the entire fitting surface of the lid main body 101 and the receiving frame 102, and the lid main body 101. There are many lid bodies 101 having a gradient receiving structure that do not cause backlash, noise due to vibrations, and sliding of the lid body 101.

  However, the lid body 101 has a drawback that the lid body 101 cannot be opened by biting into the receiving frame 102 depending on the installation environment, or the opening operation is difficult due to rusting of the receiving frame and the lid body.

If the inclination angle of the fitting surface is 10 ° or more, when a load is applied to one part of the periphery of the lid body, a phenomenon occurs that the lid body slides up on the opposite side to which the load is applied. I couldn't make it an angle.
Japanese Patent Laid-Open No. 53-072357 JP 2005-048479 A

  A circular lid for an underground structure having a gradient receiving structure has a problem that it is difficult to open the lid due to excessive biting or rusting of the lid body.

  In view of the above circumstances, the present invention is to solve problems such as the circular lid body for underground structures excessively bites into the receiving frame, the lid body does not open, and the lid opening operation is difficult due to rust, etc. A hinge for connecting the receiving frame and the lid body, and a circular lid for an underground structure in which a burl hole is engraved on the periphery opposite to the hinge of the lid body, the uppermost portion of the receiving frame is formed in a convex curved surface, The uppermost part of the outer peripheral surface is formed into a concave curved surface that closely fits with the convex curved surface of the receiving frame, and the angle of the tangent at the uppermost part of the curve of the fitting contact surface between the lid body and the receiving frame is 15 ° with respect to the vertical line. The angle of the tangent line of the curve at the lowest part of the contact surface is 3 ° to 8 ° with respect to the vertical line, and the lid body and the receiving frame are in close contact with each other.

  Further, the present invention provides a circular receiving frame and a lid that opens and closes the upper opening of the receiving frame in order to prevent accidents due to the rising of the lid main body or the scattering of the lid main body when installed in a place where the vehicle passes frequently. Staircase with the inner peripheral surface of the receiving frame inward from the top in the base structure, the hinge that connects the receiving frame and the lid main body, and the circular lid for underground structures with a bar hole engraved on the periphery facing the hinge of the lid main body The uppermost first surface is set to a convex curved surface, the second surface is set to an inclined surface with the lower end protruding inward from the first surface, and the third surface is formed to be a substantially vertical surface. Each of the surfaces is smoothly connected, and the outer peripheral surface of the lid body is formed with three surfaces so as to fit into the inner peripheral surface of the receiving frame, and the uppermost first surface is the first surface of the receiving frame. Set to a concave curved surface that fits closely, and the second surface of the lid body is an inclined surface that has a clearance of 0.5 to 3 mm from the inclined surface of the receiving frame Constant, and the third surface was set to the underground construction for the circular lid to allow clearance 0.2~0.5mm the vertical plane of its top receives frame with convex curved surface protruding outward.

  The present invention includes a circular receiving frame, a lid main body that opens and closes an upper opening of the receiving frame, a hinge that connects the receiving frame and the lid main body, and a burl hole that is formed on the periphery of the lid main body facing the hinge. In the circular lid for underground structures, the receiving frame and the lid main body are completely fitted with a curved surface, so the contact surface between the receiving frame and the lid main body has a large angle with respect to the vertical surface, and as it goes downward Since it gradually becomes smaller, the load is mainly supported at the upper side, and at the same time, excessive biting of the lid main body is suppressed, and the same effect as the conventional gradient receiving structure can be obtained at the lower side. Moreover, since the lid body is easily slid into the receiving frame when the lid is closed by using the curved surface, the lid closing operation is facilitated.

  In the present invention of claim 2, the uppermost first surface has the above-described effects, and the second surface has an effect of stopping the lid body from sinking by a certain amount of wear due to long-term use. Accordingly, the second surface may be horizontal, but by making it an inclined surface, it is easy for the sand to fall down so as not to accumulate when the sand from the outside enters and prevent the fitting of the lid body and the receiving frame. effective.

  When the third surface is installed in a place where the conditions of the lid body such as vehicle passage are severe, the third surface is provided with a substantially vertical third surface so that the lid body can be displaced when a load is applied to the periphery of the lid body. It is possible to reliably prevent the lid body from swinging, to prevent the lid body from swinging, and to prevent a vehicle accident caused by scattering of the lid body or half-opening.

  In addition, the third surface of the lid body is a convex curved surface, and the clearance from the substantially vertical vertical surface of the receiving frame is 0.2 to 0.5 mm so that the bar body is inserted into the bur hole of the lid body. When the lid is opened with an inclination, it does not interfere with the vertical surface of the receiving frame and cannot be opened.

  In FIG. 2, the top view and sectional drawing of the circular lid | cover for underground structures of this invention are shown.

  The present invention of claim 1 includes a circular receiving frame 1, a lid body 2 that opens and closes an upper opening of the receiving frame 1, a hinge 3 that connects the receiving frame 1 and the lid body 2, and a hinge of the lid body 2. 3, the uppermost portion of the receiving frame 1 is formed as a convex curved surface 6, and the uppermost portion of the outer peripheral surface of the lid main body 2 is formed on the receiving frame 1. It is formed on a concave curved surface 9 that is closely fitted to the convex curved surface 6, and the tangent angle at the uppermost part of the curve of the fitting contact surface of the lid body 2 and the receiving frame 1 is 15 ° to 30 ° with respect to the vertical line. It is a circular lid for an underground structure in which the angle of the tangent line of the curve at the bottom of the surface is 3 ° to 8 ° with respect to the vertical line, and the lid body 2 and the receiving frame 1 are closely fitted. .

  The fitting surface R of the lid main body 2 and the receiving frame 1 is a curved surface that swells in the center of the lid and does not protrude from the lower end of the curved surface, and the uppermost portion of the curve of the fitting contact surface R of the lid main body 2 and the receiving frame 1 in the cross section. A surface that forms a curve in which the angle of the tangent line is 15 ° to 30 ° with respect to the vertical line and the angle of the tangent line of the curve at the bottom of the contact surface R is 3 ° to 8 ° with respect to the vertical line This is a circular lid for an underground structure in which the lid body 2 and the receiving frame 1 are closely fitted.

  The concave curved surface 9 with the receiving frame 1 of the lid main body 2 shown in FIG. 3 and the convex curved surface 6 with which the lid main body 2 of the receiving frame 1 comes into contact are made to have the same shape.

  With the above structure, excessive encroachment of the lid body 2 above the contact surface R between the lid body 2 and the receiving frame 1 is prevented, and a conventional gradient receiving structure is provided below the contact surface R between the lid body 2 and the receiving frame 1. Similarly, the movement of the lid body 2 can be stopped, and rattling, swinging, and scattering of the lid body 2 can be prevented.

  The present invention of claim 2 includes a circular receiving frame 1, a lid body 2 that opens and closes an upper opening of the receiving frame 1, a hinge 3 that connects the receiving frame 1 and the lid body 2, and a lid body 2. In the circular lid for an underground structure in which a burl hole 4 is engraved on the peripheral edge facing the hinge 3, the inner peripheral surface of the receiving frame 1 is formed into three stepped surfaces from the top to the inner side, and the uppermost first surface The convex surface 6 is set, the second surface is set to be an inclined surface whose lower end protrudes inward from the first surface, the third surface is formed as a substantially vertical surface, and each surface is smoothly connected to each other, and the lid body The outer peripheral surface of 2 is formed with three surfaces so as to be fitted to the inner peripheral surface of the receiving frame 1, and the uppermost first surface is set to a concave curved surface 9 that fits closely to the first surface of the receiving frame 1. The second surface of the lid body 2 is set to an inclined surface 10 having a clearance of 0.5 to 3 mm from the inclined surface 7 of the receiving frame 1, and the third surface is a curved surface 11 protruding outward. Is circular lid underground structures the set to allow clearance 0.2~0.5mm the vertical plane 8 of the receiving frame 1.

  If the tangent angle with respect to the vertical line below the curved contact surface R of the lid main body 2 and the receiving frame 1 is appropriately set between 3 ° and 8 ° with respect to the size of the lid main body 2, the lid main body 2 can be lifted. Although swinging can be prevented, when installed on a road surface with heavy traffic, the inner peripheral surface of the receiving frame 1 faces inward from the top in order to surely prevent the lid body 2 from rising, swinging and scattering. The uppermost first surface is a convex curved surface 6, the second surface is an inclined surface 7 whose lower end protrudes inward from the first surface, and the third surface is a substantially vertical vertical surface. 8, each surface is smoothly connected, the outer peripheral surface of the lid body 2 is formed with three surfaces so as to be fitted to the inner peripheral surface of the receiving frame 1, and the uppermost first surface is the receiving frame The second curved surface 9 is set to a concave curved surface 9 that closely fits with the first convex curved surface 6, and the inclined surface 1 has a clearance of 0.5 to 3 mm from the inclined surface 7 of the receiving frame 1. The third surface is a curved surface 11 projecting outward, and the top of the third surface is set so as to form a clearance of 0.2 to 0.5 mm from the substantially vertical vertical surface 8 of the receiving frame 1. Invented.

  The inclined surface 7 of the receiving frame 1 serves to stop the subsidence by the inclined surface 7 when the lid main body 2 sinks due to wear when the circular lid for the underground structure is used for a long time. The inclined surface 7 and the inclined surface 10 may be horizontal with respect to the receiving frame 1 and the lid body 2. However, when the lid body 2 is opened and closed, dirt on the road surface enters and accumulates in this portion. Since there is a possibility of rising, the inclined surface 7 and the inclined surface 10 are inclined surfaces that face inward and downward.

  The vertical surface 8 of the third surface of the receiving frame 1 is a substantially vertical surface, so that the lid body 2 is prevented from being inclined and slipping up when a load is applied to the periphery of the lid body 2.

  Although the gap between the curved surface 11 of the third surface of the lid body 2 and the vertical surface 8 of the third surface of the receiving frame 1 is small, opening the lid body 2 does not lift the lid body 2 horizontally. Since the opening / closing tool is usually inserted into the burl hole 4 in the periphery of the lid body 2 and the lid body 2 is lifted in an oblique state, the third surface of the lid body 2 is A gap is provided between the convex curved surface 11 and the vertical surface 8 of the third surface of the receiving frame 1, and the third surface of the lid body 2 is a curved surface 11.

  The circular lid for underground structures according to the present invention can be used as a road surface installation lid. In particular, in the case of an urgent need to open the lid such as a fire hydrant lid, the lid can be easily opened, and is less likely to rattle due to vehicle traffic, and can be used as a lid that prevents accidents due to scattering of the lid body.

It is principal part sectional drawing of the conventional circular lid | cover for underground structures. It is the top view and sectional drawing of the circular lid | cover for underground structures of this invention. It is principal part sectional drawing of the lid body and receiving frame at the time of the lid opening of this invention. It is principal part sectional drawing of the cover main body and receiving frame of the closure body of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Receiving frame 2 ... Lid body 3 ... Hinge 4 ... Bar hole 6 ... Convex curve 9 ... Concave surface 7 ... Inclined surface 8 ... Vertical surface 10 ... Inclined surface 11 ... Convex surface

Claims (2)

  For underground structures with a circular receiving frame, a lid body that opens and closes the upper opening of the receiving frame, a hinge that connects the receiving frame and the lid body, and a burl hole in the periphery of the lid body that faces the hinge In the circular lid, the uppermost portion of the receiving frame is formed into a convex curved surface, and the uppermost portion of the outer peripheral surface of the lid body is formed into a concave curved surface that closely fits the convex curved surface of the receiving frame, and the lid main body and the receiving frame are fitted. The angle of the tangent at the top of the curve of the contact surface is 15 ° to 30 ° with respect to the vertical line, and the angle of the tangent of the curve at the bottom of the contact surface is 3 ° to 8 ° with respect to the vertical line. A circular lid for an underground structure formed and formed by tightly fitting a lid body and a receiving frame.   For underground structures with a circular receiving frame, a lid body that opens and closes the upper opening of the receiving frame, a hinge that connects the receiving frame and the lid body, and a burl hole in the periphery of the lid body that faces the hinge In the circular lid, the inner peripheral surface of the receiving frame is formed in three steps that are stepped from the top to the inside, the uppermost first surface is set to a convex curved surface, and the lower end of the second surface is inward from the first surface The projecting inclined surface is set, the third surface is formed as a substantially vertical surface, each surface is smoothly connected, and the outer peripheral surface of the lid body is fitted with the three surfaces so as to fit the inner peripheral surface of the receiving frame. The uppermost first surface is set to a concave curved surface that fits closely with the first surface of the receiving frame, and the second surface of the lid body is inclined to have a clearance of 0.5 to 3 mm from the inclined surface of the receiving frame. The third surface is a convex curved surface projecting outward, and the top is set so that a clearance of 0.2 to 0.5 mm is formed on the vertical surface of the receiving frame. Circular lid for underground structures.

Images