JP4782071B2 - Circular lid for underground structures - Google Patents

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 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 circular hole for the underground structure that has a bar hole in the periphery facing the hinge of the lid body In the lid, the inner peripheral surface of the receiving frame is formed in five steps that are stepped from the top to the inside, and the uppermost first surface is set at an angle of 10 ° to 15 ° with respect to the vertical surface. Is set to be larger than the inclination angle of the first surface, the third surface is set to be substantially vertical, the fourth surface is set to be substantially the same as the inclination angle of the second surface, and the fifth surface is substantially Set to vertical surfaces, connect each surface smoothly, and the outer peripheral surface of the lid body fits the inner peripheral surface of the receiving frame The first surface of the receiving frame and the first surface of the lid main body are set to have a diameter and an inclination angle that fit completely, and the second surface and the fourth surface of the lid main body are the receiving frame. A circular lid for an underground structure in which the gap is set at an inclination angle of 1 to 2 mm, and the third and fifth surfaces of the lid body are set to be substantially vertical surfaces with a gap of 0.5 mm or less between the receiving frame and did.

  In addition, the present invention is intended to solve the problems such as the circular lid body for underground structures excessively bites into the receiving frame, the lid body cannot be opened, and the lid opening operation is difficult due to rust. A frame, a lid main body that opens and closes the upper opening of the receiving frame, a hinge that connects the receiving frame and the lid main body, and a circular lid for underground structure in which a burl hole is engraved on the periphery of the lid body facing the hinge. The inner peripheral surface of the frame is formed into three stepped surfaces from the top to the inside, the uppermost first surface is set at an angle of 10 ° to 15 ° with respect to the vertical surface, and the inclination angle of the second surface is The inclination angle of the first surface is set to be larger, the third surface is set to a substantially vertical surface, each surface is smoothly connected, and the outer peripheral surface of the lid body is fitted to the inner peripheral surface of the receiving frame. The first surface of the receiving frame and the first surface of the lid body are set to have a diameter and an inclination angle that can be completely fitted. The second surface of the lid body is set to an inclination angle that makes the gap with the receiving frame 1 to 2 mm, and the third surface of the lid body is set to a substantially vertical surface with the gap to the receiving frame being 0.5 mm or less. A circular lid for underground structures was made.

  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 inner peripheral surface of the receiving frame is formed in five steps from the top to the inside, and the uppermost first surface is set at an angle of 10 ° to 15 ° with respect to the vertical surface. The inclination angle of the second surface is set to be larger than the inclination angle of the first surface, the third surface is set to be substantially vertical, the fourth surface is set to be substantially the same as the inclination angle of the second surface, The five surfaces are set to be substantially vertical surfaces, the respective surfaces are smoothly connected, and the outer peripheral surface of the lid body is formed into five surfaces so as to be fitted to the inner peripheral surface of the receiving frame. The first surface of the lid body is set to a diameter and an inclination angle that completely fits, and the gap between the second surface and the fourth surface of the lid body is 1-2 mm. Since the third and fifth surfaces of the lid body are circular lids for underground structures set to a substantially vertical surface with a gap of 0.5 mm or less between the receiving frame and the third and fifth surfaces of the lid body, Problems such as the circular lid body biting into the receiving frame excessively and the lid body cannot be opened, and the lid opening operation is difficult due to rust, can be solved.

  The present invention also provides a circular receiving frame, a lid main body that opens and closes the upper opening of the receiving frame, a hinge that connects the receiving frame and the lid main body, and a burr hole is formed in the peripheral edge of the lid main body facing the hinge. In the installed circular lid for underground structure, the inner peripheral surface of the receiving frame is formed into three stepped surfaces from the top to the inside, and the uppermost first surface is at an angle of 10 ° to 15 ° with respect to the vertical surface The second surface is set to have an inclination angle larger than that of the first surface, the third surface is set to a substantially vertical surface, each surface is smoothly connected, and the outer peripheral surface of the lid body is the receiving frame. It is formed on three surfaces so as to be fitted to the inner peripheral surface, the first surface of the receiving frame and the first surface of the lid body are set to a diameter and an inclination angle that completely fit, and the second surface of the lid body is The tilt angle is set so that the gap with the receiving frame is 1 to 2 mm, and the third surface of the lid body is substantially vertical with the gap with the receiving frame being 0.5 mm or less. Since the circular lid for underground structures is set on the surface, the circular lid body for underground structures excessively bites into the receiving frame, the lid body does not open, and it is difficult to open the lid due to rust. Can be solved.

  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 1. In the circular lid for underground structures with a burl hole 4 engraved on the periphery facing 3, the inner peripheral surface of the receiving frame 1 is formed in stepped five surfaces 6, 7, 8, 9, 10 from the top to the inside. As shown in FIG. 3, the uppermost first surface 6 is set to an inclination angle of 10 ° to 15 ° with respect to the vertical surface, and the inclination angle of the second surface 7 is greater than the inclination angle of the first surface 6. The third surface 8 is set to a substantially vertical surface, the fourth surface 9 is set to a substantially same inclination angle as the inclination angle of the second surface 7, the fifth surface 10 is set to a substantially vertical surface, The outer peripheral surface of the lid body 2 is formed on the five surfaces 11, 12, 13, 14, 15 so as to be joined to the inner peripheral surface of the receiving frame 1. The first surface 6 of the lid 1 and the first surface 11 of the lid body 2 are set to have a diameter and an inclination angle that can be completely fitted, and the second surface 12 and the fourth surface 14 of the lid body 2 are spaced from the receiving frame 1. Is set to an inclination angle of 1 to 2 mm, and the third surface 13 and the fifth surface 15 of the lid body 2 are set to be substantially vertical surfaces with a gap of 0.5 mm or less between the receiving frame 1 and the circular for underground structures It is a lid.

  With the above structure, the lid body 2 has a gradient receiving structure, although the inclination angle of the first surface 11 of the uppermost lid body 2 and the first surface 6 of the receiving frame 1 is different. Can be prevented.

  Since the inclination angle is 10 ° to 15 ° with respect to the vertical plane (the conventional method is 5 ° to 10 °), excessive biting hardly occurs and the lid can be opened easily. Even if the biting progresses, further biting can be prevented by the inclined surface having the larger inclination angle of the second surface 7 of the receiving frame 1 and the second surface 12 of the lid body 2.

  Since the inclination angle of the first surface 6 of the receiving frame 1 at the upper part of the lid fitting surface and the first surface 11 of the lid body 2 is set to 10 ° to 15 °, a load is applied to one peripheral portion of the lid body 2 In addition, the lid body 2 may slide up to the opposite side of the load position.

  As a countermeasure, the third surface (8.13) and the fifth surface (10.15) from the top are received as substantially vertical surfaces (hereinafter referred to as vertical surfaces) for both the frame 1 and the lid body 2. The gap between the vertical receiving frame 1 and the lid body 2 close to 0 is effective in preventing the lid body 2 from sliding up, but it is usually performed to lift the lid body 2 in a horizontal state and open the lid. Since the lid body 2 is opened by prying one bar insertion opening of the lid body 2 with a bar, the lid body 2 is inclined, and if there is no gap, the vertical surface interferes and it is difficult to open the lid. Therefore, a gap of 0.5 mm or less was provided.

  Further, the lower the vertical surface is, the greater the effect of preventing the lid body 2 from sliding up. However, the vertical surface also takes into consideration the position of the vertical surface and the size of the lid body 2 because it is related to the diameter of the lid body 2. When the gap between the lid main body 2 and the receiving frame 1 is determined within a range of 0.5 mm or less and a load is applied to one peripheral portion of the lid main body 2, it is minimal that the lid main body 2 is laterally shifted or raised. At the same time, make sure that there is no obstacle to opening the lid.

  FIG. 4 shows a state in which the lid body 2 is fitted to the receiving frame 1 of the present invention.

  Further, the present invention of claim 2 includes a circular receiving frame 1 shown in FIG. 5, a lid body 2 that opens and closes an upper opening of the receiving frame 1, and a hinge 3 that connects the receiving frame 1 and the lid body 2. In the circular lid for underground structure in which a burl hole 4 is engraved on the peripheral edge of the lid body 2 facing the hinge 3, the inner peripheral surface of the receiving frame 1 is formed into stepped three surfaces 6, 7, 8 from the top to the inside. The uppermost first surface 6 is set to an inclination angle of 10 ° to 15 ° with respect to the vertical surface, the inclination angle of the second surface 7 is set larger than the inclination angle of the first surface 6, and the third The surface 8 is set to be a substantially vertical surface, each surface is smoothly connected, and the outer peripheral surface of the lid body 2 is formed on the three surfaces 11, 12, 13 so as to be fitted to the inner peripheral surface of the receiving frame 1, The first surface 6 of the receiving frame 1 and the first surface 11 of the lid main body 2 are set to have a diameter and an inclination angle that completely fit, and the second surface 12 of the lid main body 2 is connected to the receiving frame 1. The third surface 13 of the lid main body 2 is a circular lid for an underground structure set to a substantially vertical plane with a gap with the receiving frame 1 of 0.5 mm or less.

  As shown in FIG. 5, the circular lids for underground structures installed in places where the load on the lids is small, such as sidewalks, shoulders, and roads with low traffic volumes, are the fourth and fifth of the lid body 2 and the receiving frame 1. The fitting surface may be omitted.

  In the present invention, only the upper inclined surface of the outer peripheral side surface of the lid main body 2 and the uppermost inclined surface of the inner peripheral surface of the receiving frame 1 are taper-fitted, and the angle is 10 ° to 15 ° with respect to the vertical surface. Therefore, the cover body 2 can be prevented from rattling with moderate bite, and excessive lid body 2 can be prevented from biting to facilitate opening.

  Since the taper fitting portion is half or less of the fitting portion of the lid main body 2 and the receiving frame 1, the frictional resistance when the lid is opened due to rusting can be made lower than that of the conventional one.

  Since the taper fitting portion between the lid main body 2 and the receiving frame 1 is at the top, there is no gap between the upper surfaces of the lid main body 2 and the receiving frame 1 so that no entrapment of earth or sand occurs, and the entrapment of earth or sand or foreign matter No backlash of the lid main body 2 due to. This is the same as the conventional lid for underground structures, but is different from Japanese Patent Application Laid-Open No. 2005-048479 of Patent Document 2.

  When a vertical part is provided below the fitting part between the lid body 2 and the receiving frame 1 and the gap between the lid body 2 and the receiving frame 1 is 0.5 mm or less, a load is applied to one place around the lid body 2 The sliding up of the lid body 2 can be minimized.

  Since the fitting surface of the receiving frame 1 with the lid main body 2 has a stepped diameter, the lid main body 2 can easily slide into a predetermined position when the lid is closed. Therefore, when the lid is closed, the lid main body 2 is stuck in the receiving frame 1 in a semi-closed state, and does not move, and there is no need to knead a place other than the bar hole 4 of the lid main body 2 or lift it by hand. Become.

  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 can be used as a lid that is less likely to rattle due to vehicle traffic.

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 at the time of lid closing of this invention. It is principal part sectional drawing which abbreviate | omitted the vertical part of this invention to one place.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Receiving frame 2 ... Lid body 3 ... Hinge 4 ... Bar hole 6 ... 1st surface (receiving frame)
7 ... 2nd surface (receiving frame)
8 ... Third surface (receiving frame)
9 ... Fourth surface (receiving frame)
10 ... Fifth surface (receiving frame)
11 ... 1st surface (lid body)
12 ... 2nd surface (lid body)
13 ... Third surface (lid body)
14 ... 4th surface (lid body)
15 ... Fifth surface (lid body)

Claims (2)

  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 circular hole for the underground structure that has a bar hole in the periphery facing the hinge of the lid body In the lid, the inner peripheral surface of the receiving frame is formed in five steps that are stepped from the top to the inside, and the uppermost first surface is set at an angle of 10 ° to 15 ° with respect to the vertical surface. Is set to be larger than the inclination angle of the first surface, the third surface is set to be substantially vertical, the fourth surface is set to be substantially the same as the inclination angle of the second surface, and the fifth surface is substantially The vertical surfaces are set so that the respective surfaces are smoothly connected, and the outer peripheral surface of the lid body is formed into five surfaces so as to be fitted to the inner peripheral surface of the receiving frame, and the first surface of the receiving frame and the first surface of the lid main body are formed. The first surface is set to a diameter and an inclination angle to be completely fitted, and the second surface and the fourth surface of the lid body are inclined angles so that a gap between the receiving frame and the receiving frame is 1 to 2 mm. A circular lid for an underground structure which is set at a degree, and the third surface and the fifth surface of the lid body are set to be substantially vertical surfaces with a gap of 0.5 mm or less between the receiving frame.   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 circular hole for the underground structure that has a bar hole in the periphery facing the hinge of the lid body In the lid, the inner peripheral surface of the receiving frame is formed in three steps that are stepped from the top to the inside, and the uppermost first surface is set at an angle of 10 ° to 15 ° with respect to the vertical surface. The inclination angle is set to be larger than the inclination angle of the first surface, the third surface is set to a substantially vertical surface, each surface is smoothly connected, and the outer peripheral surface of the lid body is fitted to the inner peripheral surface of the receiving frame The first surface of the receiving frame and the first surface of the lid body are set to have a diameter and an inclination angle so that the first surface of the lid body is completely fitted, and the second surface of the lid body has a gap with the receiving frame. Set the tilt angle to 1 to 2 mm, and the third surface of the lid body is set to an almost vertical surface with a gap of 0.5 mm or less with the receiving frame Circular lid for structures.

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