JP2011084999A - Hinge structure of iron lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that, when a space occupied by a hinge structure is large in an iron lid having a small opening size, the entering and exit of an opener becomes difficult especially in a structure requiring the operation of an internally installed shut-off valve and the like from the outside. <P>SOLUTION: Two rails which are composed of line grooves are vertically symmetrical, and face each other are formed at the inner peripheral surface immediately below a lid mounting portion of an iron lid receiving frame opening whose upper surface is exposed. An upper end grooves of the rails are closed. Parts of rail sides to which a pin corresponding to an approximately entire rail width, tilted at about 30 degrees in the right and left direction viewed from a receiving frame center is projected are notched. A rod-shaped hinge metal fitting which is journaled swingingly in the right-angled direction to a horizontal surface of a lid body is formed on the lid body. The other end of the hinge metal fitting has the pin which is engaged with the rails of the receiving frame, and slides and turns. The pin abuts against the notched portions of the rails and connected by twisting. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention has a hinge structure that connects a receiving frame and a lid of an iron lid that has a relatively small effective inner diameter and a large depth. The size of the mounting structure is as small as possible and does not easily disengage after assembly. Involved in configuration.

  2. Description of the Related Art Conventionally, there is a configuration in which an annular support portion that guides a bar-shaped hinge that moves up and down in a vertical direction is provided in a space of a receiving frame opening.

  The object of the present invention is that the iron cover with a small opening size has a large space occupied by the hinge structure. Therefore, it is a technical problem to be solved to provide a configuration to improve the opening / closing device which has been difficult to access and has a practical demand.

    The technical means for solving the above-mentioned problem is that the upper and lower surfaces of the iron lid receiving frame opening that is exposed to the road surface are symmetrical in the vertical direction on the inner peripheral surface immediately below the lid mounting portion, and are composed of two opposing grooves. The rail side surface of the portion that forms the rail of the strip, closes the upper end groove portion of the rail, projects the tilted pin at an angle of about 30 degrees around the right and left sides when viewed from the center of the receiving frame, A notch is formed with a rod-shaped hinge that is pivoted in a direction perpendicular to the horizontal surface of the lid, and the other end of the hinge engages, slides and rotates on the rail of the receiving frame. It has a moving pin, and the pin is brought into contact with the notch portion of the rail and connected by twisting.

  The two rails to be planted on the inner peripheral surface just below the lid mounting portion of the receiving frame opening described above have a required height of about 15 mm, whereas the projecting dimension of the conventional annular support portion is about 45 mm. Yes, it has a very compact structure, and the presence of hinges is indispensable in terms of function, and the overall volume is the minimum required. There is no hindrance to the entry and exit of the stopper, and it is necessary to twist the lid in order to disassemble the assembly.

    Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a receiving frame body, 2 is a lid that opens and closes as indicated by arrows A and B as shown in FIG. 2, and 3 is a rod-shaped hinge that integrally has pins 4 and 5 at the upper and lower ends as shown in FIG. The pins 4 are assembled so as to be rotatable about the shaft support 6 of the lid 2, and two parallel mountings are vertically attached to the wall surface 8 immediately below the mounting surface 7 of the lid 2 in the receiving frame body 1. A rail 9 is formed, and a notch 10 shown in FIG. 3 at a required portion of the mounting rail 9, that is, a portion where the pin 5 of the rod-shaped hinge 3 abuts obliquely is slightly cut away. When assembling the hinge hardware 3 to the receiving frame body 1, the pin 5 is assembled in an oblique shape and is made to stand upright in the direction of the arrow C, whereby the pin 5 is shown by arrows D, E in FIG. It becomes slidable as shown in FIG.

The front sectional view of the lid state of the important section which carried out the present invention. The front sectional view of the lid opening state of the principal part which carried out the present invention. The partial cross section perspective view which shows the principal part of the receiving frame main body 1 shown in FIG. The perspective view which shows the rod-shaped hinge hardware 3 shown in FIG.

1, receiving frame body 2, lid 3, rod-shaped hinge 4, lid-side pivot support pin 5, receiving-frame-side pivot support pin 6, lid-side hinge mounting part 7, lid placement surface 8, wall surface 9, mounting rail 10, Notch

Claims (1)

  The upper end groove portion of the rail is formed of two rails that are vertically symmetrical on the inner peripheral surface immediately below the lid mounting portion of the iron lid receiving frame opening that exposes the upper surface on the road surface, and that are opposed to each other. The side of the rail that is projected by tilting the pin corresponding to the width of almost the entire rail at an angle of about 30 degrees is cut out from the left and right sides when viewed from the center of the receiving frame, A bar-shaped hinge hardware pivotally supported in a right-angle direction is configured, and the other end of the hinge hardware has a pin that engages, slides and rotates on the rail of the receiving frame, and the notch portion of the rail An iron lid hinge structure characterized in that the pin is brought into contact with and connected by twisting.

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