JP2003147796A - Hinge structure of lid for underground structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge structure of al id for an underground structure for easily returning the lid to the original position of a receiving frame when closing the lid. SOLUTION: This hinge structure of the lid for the underground structure is composed of the lid, the receiving frame opened and closed by the lid, and a hinge for connecting the lid and the receiving frame, and is constituted so that the hinge is composed of a first hinge metal fitting and a second hinge metal fitting, one end first shaft of the first hinge metal fitting is rotatably arranged on a hinge receiving seat of a receiving frame inside surface, one end of the second hinge metal fitting and the other end of the first hinge metal fitting are connected by a connecting shaft, and the other end second shaft of the second hinge metal fitting is movably arranged in the horizontal direction on the reverse of the lid. A guide means of the lid is arranged in the lid, the receiving frame, and the hinge so that the lid can be fitted to the receiving frame in an original state when closing the lid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge structure for a lid for an underground structure such as a manhole, and more particularly to a hinge structure for an underground structure in which the lid naturally returns to its original position when the lid is closed. It is a thing.

[0002]

2. Description of the Related Art As a hinge structure for a lid for an underground structure such as a manhole, which is composed of a lid, a receiving frame opened and closed by the lid, and a hinge connecting the lid and the receiving frame, those shown in FIGS. is there.

The lid 101 and the receiving frame 102 are connected by a hinge 103, the hinge 103 is composed of a first hinge fitting 104 and a second hinge fitting 105, and a sliding long hole 106 is formed in the first hinge fitting 104. Then, the first shaft 107 at one end of the first hinge fitting 104 is rotatably provided on the hinge seat 108 on the inner surface of the receiving frame 102, and the connecting shaft 109 at one end of the second hinge fitting 105 slides on the first hinge fitting 104. The second shaft 110 at the other end of the second hinge fitting 105 is pivotally attached to the back surface of the lid 101 by being inserted into the moving elongated hole 106, and the opening of the receiving frame 102 is opened and closed by the lid 101.

Examples of the hinge structure of the lid for the underground structure are Japanese Patent No. 2649314 and Japanese Patent No. 2571337.

[0005]

In the conventional hinge structure for the underground structure lid described above, the lid can be smoothly opened without any problem, but there is a problem that the lid does not return to the original position of the receiving frame when the lid is closed. is there.

As shown in FIG. 14, when the lid is closed, the lid 101 may be too close to the front and the lid 101 may fall, and the movement of the lid 101 may stop. When the stopped lid 101 is pushed by hand, the state shown in FIG. 15 is obtained. Even if it does not stop in the state of FIG. 14, it always stops in the state of FIG. The lid 101 in the state of FIG. 15 does not move even if it is hit with a hand. Hit with a hammer or lift once with both hands to put the lid in the normal position 101
Must be fitted to the receiving frame 102. At this time, there is a risk that the hand is caught between the lid 101 and the receiving frame 102.

[0007]

In view of the above circumstances, the present invention has a lid and a receiving frame opened and closed by the lid so that the lid can easily return to the original position of the receiving frame when the lid is closed. It consists of a hinge that connects the lid and the receiving frame, and the hinge is composed of the first hinge metal fitting and the second hinge metal fitting, and the first shaft at one end of the first hinge metal fitting is rotatably provided on the hinge seat on the inner surface of the receiving frame. An underground structure in which one end of the second hinge fitting and the other end of the first hinge fitting are connected by a connecting shaft, and the second shaft at the other end of the second hinge fitting is horizontally movable on the back surface of the lid. In the hinge structure of the lid for the object, the guide structure of the lid is the hinge structure of the lid for the underground structure provided on the lid, the receiving frame and the hinge so that the lid can be fitted to the receiving frame in the original state when the lid is closed.

Further, according to the present invention, specifically, the guide means of the lid includes a sliding protrusion on the back surface of the lid, a guide surface of a first hinge member for guiding the sliding protrusion, and a guide surface for the lid. The hinge structure of the lid for the underground structure is composed of the projection of the first hinge metal fitting that is held on the inclinable inclined surface, and the stop piece on the inner surface of the receiving frame that contacts the projection.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, an underground structure such as a manhole comprises a lid 1, a receiving frame 2 which is opened and closed by the lid 1, and a hinge which connects the lid 1 and the receiving frame 2. A hinge seat 3 for rotatably holding the hinge shaft is provided on the inner surface of the receiving frame 2, and a hinge locking recess 4 for horizontally holding the hinge shaft is provided on the back surface of the lid 1. Reference numeral 5 is a burl hole into which the burl is inserted when the lid 1 is opened.

An assembly drawing of an example of the hinge 11 used in the present invention is shown in FIG. The hinge 11 includes a first hinge fitting 12 and a second hinge fitting 13.

Parts diagrams of the first hinge fitting 12 and the second hinge fitting 13 are shown in FIG.

The first hinge member 12 is a generally rectangular plate,
The first shaft 15 is penetrated through the end portion of the vertical plate piece 14 on one end side so as to project to both sides of the plate piece 14. The other end side of the first hinge fitting 12 has a U-shaped piece 1 for sandwiching a second hinge fitting 12 described later.
6 to form. An insertion hole 20 is formed in the U-shaped piece 16. The upper surface of the second hinge fitting 12 is formed as a guide piece 17 that guides a sliding protrusion of the lid 1 described later. The upper surface of the guide piece 17 is an inclined surface or a curved surface.

The second hinge member 13 is a substantially L-shaped plate, and has an insertion hole 18 formed at one end and a second shaft 19 penetrated at the other end.

As for the first hinge fitting 12 and the second hinge fitting 13, the second hinge fitting 13 is inserted between the U-shaped pieces 16 of the first hinge fitting 12, and the U-shaped piece 16 of the first hinge fitting 12 is inserted. A connecting shaft 21 made of a bolt is inserted into the insertion hole 20 of FIG. 2 and the insertion hole of the second hinge fitting 13 and screwed with a nut 22.

As shown in FIG. 2, the hinge 11 is formed such that the other end of the second hinge fitting 13 is erected and is rotatable in the direction in which the lid 1 is closed. The second hinge fitting 13 is constrained so that it does not fall outward from the vertical direction when viewed from the first hinge fitting 12, and is freely rotatable inward. Therefore, the end surface 23 on the one end side of the second hinge fitting 13 and the back end surface 24 of the U-shaped piece 16 of the first hinge fitting 12 are brought into contact with each other, and the other end of the second hinge fitting 12 is held substantially vertically. Also, it should be possible to freely rotate inward.

This hinge 11 has a lid 1 and a receiving frame 2 shown in FIG.
Be attached to.

Ribs 31 and 32 are provided on the back surface of the lid 1 shown in FIG. The ribs 31 and the ribs 32 are arranged in parallel with each other so as to receive the second hinge fitting 13, and the hinge locking recesses 4 are horizontally formed on the inner surfaces where the ribs 31 and 32 face each other. The second shaft 19 of the hinge 11 slides in the length direction of the hinge locking recess 4. Reference numeral 58 is a hinge retaining bolt for the second shaft 19.

An example in which the hinge 11 is attached to the lid 1 and the receiving frame 2 is shown in FIG.

When the lid is closed, the linear portion of the upper surface of the first hinge member 12 is lifted inward from the horizontal by 10 ° to 20 ° so that the second hinge member 13 does not hit the back surface of the lid 1. , The projection 33 of the first hinge fitting 12 and this projection 3
3 and the stop piece 34 on the inner surface of the receiving frame 2 that is in contact with the receiving frame 3.

Another assembly example of the hinge 41 of the present invention is shown in FIG.
Shown in. The hinge 41 is the first hinge fitting 42 and the second hinge fitting 4
3 and 3.

Parts diagrams of the first hinge fitting 42 and the second hinge fitting 43 are shown in FIG.

The first hinge fitting 42 has a substantially rectangular plate shape,
The first shaft 44 is passed through at one end, the insertion hole 45 is bored at the other end, and the stop piece 52 is projected at the center.

The second hinge member 43 is two generally L-shaped plates, and comprises a shaft plate 47 and a support plate 48. The connecting shaft 48 is erected at one end of the shaft plate 46, and the second shaft 4 is provided at the other end of the shaft plate 46.
9 stand up. An insertion hole 50 for receiving the connecting shaft 48 is formed at one end of the support plate 47, and a hole 51 for receiving the second shaft 49 is formed at the other end of the support plate 47.

As shown in FIG. 6, the hinge 41 is formed such that the other end of the second hinge fitting 43 is erected and is rotatable in the direction in which the lid 1 is closed. The second hinge member 43 is constrained so that it does not fall outward more than substantially vertically when viewed from the first hinge member 42, and is freely rotatable inward. The end surface 55 on the one end side of the second hinge fitting 43 and the stop piece 52 of the first hinge fitting 42 come into contact with each other, the other end of the second hinge fitting 42 is held substantially vertically, and is freely rotated inward. To be able to move.

The hinge 41 includes a lid 1 and a receiving frame 2 shown in FIG.
Be attached to.

A rib 53 is provided on the back surface of the lid 1 in FIG.
The rib 53 is provided with a through hole 54 in the horizontal direction. The second shaft 49 of the hinge 41 slides in the lengthwise direction of the through hole 54.

When the lid is closed, the linear portion of the first hinge member 42 is raised 10 ° to 20 ° from the horizontal toward the inner direction of the receiving frame 2 so that the second hinge member 43 does not hit the back surface of the lid 1. The projection 60 of the first hinge fitting 42 and the stop piece 34 on the inner surface of the receiving frame 2 that contacts the projection 60 are adjusted.

Further, the upper surface of the first hinge fitting 42 is the lid 1
It is formed on the slanted surface or curved guide surface 59 of the sliding protrusion 57.

The first shaft 44 of the first hinge member 42 is rotatably supported on the hinge seat 3 of the receiving frame 2, and the connecting shaft 48 at one end of the shaft plate 46 is inserted into the insertion hole 45 of the first hinge member 42. Let
The second shaft 49 at the other end of the shaft plate 46 is inserted into the through hole 54 of the rib 53 of the lid 1, and the connecting shaft 48 is inserted into the insertion hole 50 of the support plate 47.
And the nut 56 is screwed onto the tip of the connecting shaft 48.

Next, the operation of the lid 1 using the hinge 11 will be described with reference to FIGS.

The operation of the lid 1 using the hinge 41 is also the same.

FIG. 9 shows a state in which the lid 1 is completely opened.

FIG. 10 shows a state in which the lid 1 is completely opened and then the lid 1 is rotated in the closing direction by about 100 °. The other end of the second hinge fitting 13 is substantially vertical to the first hinge fitting 14, and the projection 33 of the first hinge fitting 13 is in contact with the stop piece 34 of the receiving frame 2.

FIG. 11 shows the state before the lid 1 closes the opening of the receiving frame 2, but the other end of the second hinge 13 stands upright with respect to the first hinge 13 and the lid 1 falls. The other end of the second hinge 13 is bent forward to guide the lid 1 forward.

In FIG. 12, the sliding projection 57 on the back surface of the lid 1 slides on the guide piece 17 of the first hinge fitting 14 to receive the lid 1 in the receiving frame 2.
Guide to the lid receiving part.

FIG. 13 shows a closed state.

[0038]

As described above, the present invention comprises the lid, the receiving frame that is opened and closed by the lid, and the hinge that connects the lid and the receiving frame. The hinge is composed of the first hinge fitting and the second hinge fitting. Is
A first shaft at one end of the first hinge fitting is rotatably provided on a hinge seat on the inner surface of the receiving frame, and one end of the second hinge fitting and the other end of the first hinge fitting are connected by a connecting shaft to form a second hinge. In the hinge structure of the lid for underground structure in which the second shaft at the other end of the metal fitting is provided on the back surface of the lid so as to be movable in the horizontal direction, in order to fit the lid to the receiving frame in the original state when closing the lid, Since the guide means is the hinge structure of the lid, the receiving frame, and the lid for the underground structure provided on the hinge, the lid is easily returned to the original position of the receiving frame when the lid is closed.

Further, in the present invention, specifically, the guide means of the lid includes a sliding projection on the back surface of the lid, a guide surface of the first hinge fitting for guiding the sliding projection, and the guide surface covers the lid. The hinge structure of the lid for the underground structure, which consists of the projection of the first hinge fitting held on the inclinable surface that can be guided and the stop piece on the inner surface of the receiving frame that contacts the projection, so that the lid is in its original position when closed. So that I can easily return to.

[Brief description of drawings]

FIG. 1 is a two-sided view of a plane and a vertical cross section of a lid and a receiving frame.

FIG. 2 is a front and top view of the assembled hinge.

FIG. 3 is a front view and a plan view of a first hinge fitting of a hinge, and a front view and a side view of a second hinge fitting of a hinge.

FIG. 4 is a trihedral view of the back surface and two side surfaces of the lid.

FIG. 5 is a vertical cross-sectional view showing a state in which a hinge is attached to the lid and the receiving frame and the lid is closed.

FIG. 6 is a two-sided view of an assembled front surface of another hinge and an exploded plan view thereof.

FIG. 7 is a front view and a plane view of the first hinge fitting of the hinge;
6 is a front view and a side view of a support plate of the second hinge fitting, and a front view and a side view of a shaft plate of the second hinge fitting. FIG.

FIG. 8 is a two-sided view of a back surface and a side surface of the lid.

FIG. 9 is a vertical cross-sectional view with the lid completely opened.

FIG. 10 is a view showing that the lid is opened from the completely opened state.
It is a longitudinal cross-sectional view of a state of being rotated in a direction in which it is closed by about 00 °.

FIG. 11 is a vertical cross-sectional view of a state before the lid closes the opening of the receiving frame.

FIG. 12 is a vertical cross-sectional view showing a state in which the sliding protrusion on the back surface of the lid slides on the guide piece of the first hinge fitting to guide the lid to the lid receiving portion of the receiving frame.

FIG. 13 is a vertical cross-sectional view showing a closed state.

FIG. 14 is a vertical cross-sectional view of a hinge structure of a conventional lid for an underground structure in which the lid is too close to the front side and is dropped when the lid is closed.

FIG. 15 is a vertical cross-sectional view of a hinge structure of a conventional underground structure lid in a state where the lid does not return to the original position of the receiving frame when the lid is closed.

[Explanation of symbols]

1 ... Lid 2 ... receiving frame 11.41 ... Hinge 12 ・ 42 ... First hinge bracket 13 ・ 43… Second hinge bracket 15.44 ... 1st axis 3 ... Hinge seat 21/48 ... Connection shaft 19/49 ... Second axis 57 ... Sliding protrusion 17 ... Guide piece (example of guide surface) 59 ... Guideway 33.60 ... Protrusion 34 ... Stopping piece

Claims (2)

[Claims] 1. A lid, a receiving frame that is opened and closed by the lid, and a hinge that connects the lid and the receiving frame, and the hinge is composed of a first hinge fitting and a second hinge fitting, and one of the first hinge fitting is The first shaft is rotatably provided on the hinge seat on the inner surface of the receiving frame, and one end of the second hinge fitting and the other end of the first hinge fitting are connected by a connecting shaft,
In the hinge structure of the lid for underground structure in which the second shaft at the other end of the second hinge fitting is provided on the back surface of the lid so as to be horizontally movable, so that the lid can be fitted to the receiving frame in the original state when the lid is closed. , A hinge structure of a lid for an underground structure in which a lid guiding means is provided on the lid, the receiving frame and the hinge. 2. The lid guide means includes a sliding protrusion on the back surface of the lid.
A guide surface of the first hinge member for guiding the sliding protrusion, a projection of the first hinge member for holding the guide surface on an inclined surface that can guide the lid, and a stop piece on the inner surface of the receiving frame that contacts the protrusion. The hinge structure of the lid for the underground structure described in 1.