JPH0745643Y2 - Iron lid with frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a framed iron lid including a lid body in which two lid portions are connected at their respective sides where they meet and a frame body that supports the lid body. is there.

(Prior Art) This type of framed iron lid is cast, for example, from ductile cast iron, and is used for the installation site of fire hydrants, water control valves and other equipment. Is a structure in which a pair of triangular lid-constituting plates constitutes a lid that fits in the frame, and three points are supported by the apexes on the back of each lid-constituting plate or the ridges provided at the four corners of the frame. Have. Because of this structure, each lid portion is always supported stably at three points, so rattling does not occur at this point. However, since it is bisected on a diagonal line, it has the longest side length at the connection part, so it is easy to bend under the load applied to the central part of the lid, and in order to counter this, a structure that increases the strength of the bisector line is used. Needed. Further, the amount of deviation at the fulcrums on both sides becomes relatively large due to the bending caused by the long side length, and thus the degree of progress of wear may differ. In addition, since there is a gap between the outer peripheral surface of the conventional lid and the inner peripheral surface of the frame to allow movement, lateral displacement occurs due to passage of an automobile, etc., and there is a problem that the lid fulcrum easily wears. .

In addition to this, there is also a so-called rectangular lid having a structure in which the outer circumference is tapered with a downward constriction, and a corresponding tapered surface is received by a receiving frame provided on the inner circumference. However, this taper receiving type square lid is different from the flat type and the three point support type square lid.
The bite tended to make it difficult to open the lid. However, it is superior to the three-point support lid in that it has no rattling and has good durability.

(Technical problem) The present invention has been made in view of the above circumstances, and the problem is that a so-called rectangular lid-shaped lid is attached to the frame without any play, making it easier to release the bite and wear it. Is to improve the durability by reducing the degree of progress.

(Technical Means) In order to solve the above-mentioned problems, the present invention has a lid which has a planar rectangular shape and two lid portions 1 and 1 ′ that divide the shape are connected by a bisecting line portion 2. It is composed of a body 3 and a frame body 6 having an opening 4 which is closed by the lid body, and the bisector 2 is set at a portion other than the longest portion like a diagonal line of the flat rectangular lid body 3, The surface on the side of each bisector 2 is loosely connected so as to be surface-contactable and bendable by wall surfaces 7 and 7'which are ground substantially at right angles to the upper surface of the lid, and the lid body 3 is a frame body. Inner wall 8 inclined so that the lower part of the opening 4 protrudes inward from the upper part
Which has a slanted outer wall 9 and 9 ', which are fitted to the inner wall 8 and outer wall 9 and 9', are ground together so that the lid 3 is kept flat by the surface contact of the wall 7 and 7 '. In this state, the surface contact can be made in the closed state.

(Operation) The lid portions 1 and 1'constituting the lid body 3 are separated from each other by the same manner as in the case of the diagonal division in the lid body 3 having a rectangular shape in the plane.
Since it is bisected by the bisector 2 which is shorter than the longest part to divide, the influence of the load applied to the central part of the lid is reduced, and the amount of deviation at the fulcrums on both sides is also compared to the conventional so-called triangular lid. Decrease. The lid portions 1 and 1'are brought into surface contact with the ground wall surfaces 7 and 7'of the mating portion 2, and the entire top surface of the lid is kept flat.

In this state, the slanted outer walls 9 and 9'provided on both lid portions 1 and 1'become into the inner wall 8 gradually, so that vertical rattling does not occur at all.

On the other hand, at the time of opening the lid, one of the lid portions 1 and 1'can be first pry open, and then the other can be pry open, and the whole lid is bent and removed, so that even if excessive biting occurs. It is easy to release it.

(Example) Hereinafter, description will be given with reference to the drawings. The illustrated example relates to a framed iron lid including a rectangular lid body 3 and a rectangular frame body 6 combined with the rectangular lid body 3.

The lid body 3 has a planar rectangular shape, and is bisected by a bisector 2 having a shorter side length, which is offset from the diagonal line, to form a non-triangular lid portion 1, 1 '. . On the back surface of the hypotenuse of each of the two divided lid portions 1, 1 ′, a falling portion 11 is provided for reinforcement.
11 'are provided respectively. Since the length of the bisector 2 is short, the size and strength of the falling portions 11 and 11 'may be smaller than that of the conventional triangular lid. Each lid part 1, 1'is loosely connected by bolts 12, nuts 13 mounted on the respective falling parts 11, 11 ', movable with respect to each other but treated as one piece. The lid parts 1, 1'are
Like the falling parts 11 and 11 ', it has hanging falling frames 14 and 14', which, when the lid 3 is excessively bitten into, the frame 6
It can be received by a supporting portion 5 provided around the opening 4. The supporting portion 5 and the falling frames 14 and 14 'are ground surfaces as indicated by finishing symbols in FIG.

The bisectors 2 of both lid portions 1 and 1'can be contacted by wall surfaces 7 and 7'which are ground substantially at right angles to the lid upper surface (finish symbol in FIG. 3). The falling portions 11 and 11 'below ′ are slightly retracted from both wall surfaces 7 and 7 ′, and the lid portions 1 and 1 ′ are set so as to be bent at the bisecting line portion 2 even in a slight mountain shape. ing. The lid portions 1 and 1 ′ can be bent at the bisecting portion 2 in the opposite manner, that is, in a valley shape. Due to this bending, when the lid 3 is detached from the frame 6, the work of prying is facilitated. Lid part 1,
The outer peripheral surface of 1'is formed with outer walls 9, 9'inclined so that the upper part projects outward from the lower part, and the outer walls 9, 9'are also ground (FIG. 4).

The frame 6 has the opening 4 closed by the lid 3 described above,
An inner wall 8 that surrounds the outer walls 9 and 9'of the lid 3 is formed around it. The inner wall 8 has a surface inclined so that the lower portion projects inward from the upper portion, and the outer walls 9 and 9'are also provided at the same inclination angle that matches the inner wall 8. When the lid body 3 integrated by bolt connection is supported by the frame body 6, the outer walls 9 and 9 '
Since the inner wall 8 and the inner wall 8 are in surface contact with each other, there is no room for the lid 3 to shift even when a lateral shift force is exerted. The inner wall 8 and the outer walls 9 and 9'are ground for fitting the lid 3 and the frame 6 together.

As shown in FIG. 5, the illustrated lid body 3 is divided into two parts by the bisector 2 which is relatively close to the diagonal line d, but it can also be divided into a rectangle as shown in FIG. Further, as shown in FIG. 7, it is divided into a large portion 2 and a large portion 2 of a lid portion 1 including one corner portion and a lid portion 1 ′ including one corner portion, and as shown in FIG. It is also possible to divide into two large and small lid portions 1, 1'at a position of about 1/4 of the side. In this case, the lid opening operation is facilitated by prying the small lid portion 1'side first when opening the lid. In each figure, 10 is the upper edge of the opening in which the inner wall 8 surrounding the lid 3 is formed, and 15 is the respective lid portions 1, 1 ′ of the lid 3.
The notches for prying formed in the, and 16 show the hook holes of the same hand, respectively.

(Effect) Since the present invention is configured and operates as described above, the lid 3 is divided into two parts by the bisector 2 which is shorter than the conventional so-called triangular lid, and the influence of the load is greater. The size is small, the bending is small, and the weight can be reduced. In the lid body 3 of the present invention, the lid body 3 is embedded in the frame body 6 due to the contact between the frame inner wall 8 and the lid outer walls 9, 9 '. Since the portion can be opened first and then the other lid portion can be opened, the effect of easily releasing the bite is obtained. In particular, the lid 3 is supported by the slanted outer walls 9 and 9'on the slanted inner wall 8 of the frame 6 by so-called taper fitting, and the outer wall 9 and 9'is embedded in the ground inner wall 8, It has the effect of eliminating lateral slippage and rattling, and also minimizes the inflow of rainwater and earth and sand.

[Brief description of drawings]

The drawings relate to an embodiment of an iron lid according to the present invention. FIG. 1 is a perspective view of an opened lid, FIG. 2 is a partial plan view showing a back surface of a lid and an upper surface of a frame, and FIG. 3 is a lid. FIG. 4 is a cross-sectional view of the partial connection portion, FIG. 4 is a partial cross-sectional view, and FIGS. 5, 6, 7, and 8 are plan views showing setting examples of the bisector. 1, 1 '... Lid part, 2 ... 2 dividing line part, 3 ... Lid body, 4
...... Aperture, 5 ...... Support part, 6 ...... Frame body, 7, 7 '... Wall surface, 8 ... Inner wall, 9, 9' ... Outer wall.

Claims (1)

[Scope of utility model registration request] 1. A flat quadrangular shape which is divided into two parts.
A lid body 3 in which individual lid portions 1 and 1 ′ are connected by a bisecting line portion 2.
And a frame 6 having an opening 4 which is closed by the lid, and the bisecting line portion 2 is set at a portion other than the longest portion such as a diagonal line of the planar rectangular lid body 3, and each 2 The surface on the side of the dividing line 2 is loosely connected so as to be surface-contactable and bendable by wall surfaces 7 and 7'which are ground substantially at right angles to the lid upper surface, and the lid body 3 is connected to the frame body opening 4 Has inclined outer walls 9 and 9'fitted to the inclined inner wall 8 so that the lower portion thereof protrudes inward from the opening, and these inner and outer walls 9 and 9'are provided.
9'is an iron lid with a frame, which is ground so that the lid body 3 can be surface-contacted while being kept flat by the surface contact of the wall surfaces 7 and 7 '.