JP2643075B2 - Hinge of iron cover for manhole - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge for an iron cover for a manhole, and more particularly to a hinge for an iron cover for a manhole, which can easily open and close the iron cover and accurately position the iron cover when the lid is closed. It is.

[0002]

2. Description of the Related Art Conventionally, as a hinge for a manhole iron cover for connecting an iron cover fitted in a receiving frame to the receiving frame so as to be openable and closable, for example, there is one disclosed in Japanese Utility Model Publication No. 57-58296. . Hereinafter, this conventional hinge will be described with reference to the drawings. FIG. 10 is a cross-sectional view showing an open / closed state of an iron cover by a conventional hinge, and FIG. 11 is a perspective view showing a hinge hardware in the conventional hinge.

In FIGS. 10 and 11, 1 is a receiving frame, 2
Is a hinge fitting for fitting the iron cover 2 to the receiving frame 1 so as to be openable and closable. The hinge metal member 3 has a pin 4 at an upper part, a hook 5 at a central part, and a stopper 6 at a lower part for preventing the hinge metal member 8 from being removed from a hole washer 8 described later. The pin 4 of the hinge hardware 3 can be inserted into a groove 7 formed on the lower surface of the end of the iron cover 2. Reference numeral 8 denotes a hole washer formed on the lower surface of the end of the receiving frame 1 and into which the hinge hardware 3 is inserted. Reference numeral 9 denotes a hook receiver formed on the inner surface of the receiving frame 1 and engaged with the hook 5 of the hinge hardware 3.

According to the conventional hinge configured as described above, the iron cover 2 is connected to the receiving frame 1 so as to be freely opened and closed as follows. That is, the pin 4 of the hinge hardware 3 is inserted into the groove 7 of the iron lid 2.
And attach the hinge hardware 3 to the iron lid 2. Next, so that the hinge hardware 3 is inserted into the hole washer 8 of the receiving frame 1,
The iron cover 2 is fitted into the receiving frame 1. As a result, the hinge hardware 3 hangs vertically by its own weight, and the hook 5 is located directly below the hook receiver 9 of the receiving frame 1. Therefore, the iron cover 2 cannot be opened unless the hinge hardware 3 is tilted clockwise in FIG.

On the other hand, the hinge hardware 3 is shown with the pin 4 as a center.
If the iron cover 2 is lifted after tilting clockwise during 10, the hook 5 of the hinge hardware 3 does not engage with the hook receiver 9 of the receiving frame 1, so that the iron cover 2 can be opened as it is. it can. As shown in FIG. 10, the iron cover 2 is opened by rotating in a vertical direction with respect to the receiving frame 1 via the hinge hardware 3,
After unlocking the hinge hardware 3, the iron cover 2 can be lifted slightly and the iron cover 2 can be opened by rotating it horizontally.

[0006]

However, the above-mentioned conventional hinge has the following problems. Since the hinge hardware 3 is loosely inserted into the hole washer 8 (when the iron cover 2 is moved when the lid is opened, the hinge hardware 3 is removed).
Also moves, so it has to be inserted loosely), and the position of the iron cover 2 cannot be accurately determined. For this reason, when closing the cover, the iron cover 2 may be obliquely fitted into the receiving frame 1. In this case, it is necessary to lift the iron lid 2 slightly and then fit it back into the receiving frame 1 again, which is troublesome. When the iron lid 2 is opened and closed by rotating in the horizontal direction, the lower surface of the periphery of the iron lid 2 (the upper surface in the open state) and the upper surface of the receiving frame 1 slide, but since the contact resistance at this time is large,
Requires considerable power to open and close.

Accordingly, an object of the present invention is to provide a hinge for a manhole iron cover that can open and close the iron cover with a small force and can accurately position the iron cover when the cover is closed.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a hinge for a manhole iron cover for connecting an iron cover fitted in a receiving frame to the receiving frame so as to be openable and closable. An arm-shaped hinge fitting whose upper part is pivotally attached to the lower surface of the end of the iron lid, and a hole washer protruding from the inner surface of the receiving frame, into which the hinge fitting is inserted. The hinge hardware has a spherical portion formed with a hook at a central portion, and a stopper for preventing removal at a lower portion, and the hole washer has a lower half portion of the hinge hardware. A hook formed on the upper surface of the hole washer between the through hole and the inner surface of the receiving frame, the hook being engaged with the hook; It is characterized in that the receptacle is formed.

[0009]

According to the present invention, since the hinge metal is supported by the spherical surface with respect to the hole washer, there is no displacement of the iron cover. Therefore, the iron cover is obliquely fitted into the receiving frame when the cover is closed. The iron cover can be rotated in the horizontal direction and opened and closed without being stuck and without sliding the iron cover with respect to the receiving frame.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an embodiment of a hinge for a manhole iron cover according to the present invention;

FIG. 1 is a sectional view of the iron cover for a manhole of the present invention in a state where it is closed by a hinge, FIG. 2 is a perspective view showing a hinge hardware of the hinge, and FIG. 3 is a hole of the hinge. FIG. 4 is a perspective view showing the washer of the same hinge, FIG. 5 is a cross-sectional view showing a state in which one end of the iron cover is slightly lifted, and FIG. 6 is a diagram further lifting one end of the iron cover. 7 is a cross-sectional view showing a state in which the lock of the iron cover is unlocked, FIG. 8 is a cross-sectional view showing a state in which the iron cover is opened until it hits the receiving frame, and FIG. It is sectional drawing which shows the state which pulled up the lower half from the through hole of the hole washer, and opened the iron cover completely.

1 to 9, reference numeral 10 denotes a receiving frame, 11
Is an iron lid fitted in the receiving frame 10, and 12 is an arm-shaped hinge fitting for connecting the iron lid 11 and the receiving frame 10 to be openable and closable, as shown in FIG. The hinge hardware 12 has a pin 13 supported on a bearing hardware described later on an upper portion, and a spherical portion formed with a hook 14 for engaging a hook receiver described later on a center portion.
15 and a lower portion provided with a stopper 16 for preventing removal from the hole washer described later.

As shown in FIG. 4, reference numeral 17 denotes a pair of bearing hardware fixed to the lower surface of the end of the iron cover 11, and has a groove 18 into which the pin 13 of the hinge hardware 12 is inserted. The pin 13 inserted into the groove 18 is prevented from coming out of the groove 18 by a bolt 19 and a nut 20 (only one of the bolt and the nut is shown). The hinge hardware 12 is mounted on the lower surface of the end of the iron cover 11 by a pair of bearing hardware 17.

Reference numeral 21 denotes a horizontal projection protruding from the inner surface of the receiving frame 10.
This is a hole washer into which the hinge hardware 12 is inserted. Hole washers 21
Has a through hole 22 in which the lower half of the hinge hardware 12 is inserted and a spherical seat 24 for receiving the lower portion of the spherical portion 15 is formed.
On the upper surface of the hole washer 21 between the
A hook receiver 23 that engages with 14 is formed.

According to the hinge of the iron cover for manhole of the present invention configured as described above, the opening and closing of the iron cover 11 is performed as follows. That is, in order to change from the closed state shown in FIG. 1 to the open state shown in FIG. 9, as shown in FIG. 5, one end of the iron cover 11 is slightly lifted by a hook or the like. As a result, the hinge fitting 12 is pushed from left to right in FIG. 5, and the lower part of the spherical portion 15 is fitted into the spherical seat 24 of the hole washer 21 as shown in FIG. As shown in FIG. 7, when the spherical portion 15 is completely fitted into the spherical seat 24, the hook 14 of the spherical portion 15 is disengaged from the hook receiver 23 of the hole washer 21 and the locking of the iron cover 11 is released. You. With this, the iron lid 11
Can be opened until it hits the receiving frame 10, as shown in FIG. Further, to open the iron lid 11 horizontally until it overlaps the receiving frame 10, the iron lid 11 is pulled up as shown in FIG. In this case, the iron lid is provided by the stopper 16 of the hinge hardware 12.
11 does not come out of the through hole 22 of the hole washer 21.

As described above, the iron cover 11 is not only opened vertically with respect to the receiving frame 10 but also, as shown in FIG.
After the 12 spherical portions 15 are completely fitted in the spherical seats 24 of the hole washers 21, the iron cover 11 can be opened by rotating in a horizontal direction.

On the other hand, an iron lid opened by being rotated in the vertical direction
To close 11, you can do the opposite of opening it. In this case, since the spherical portion 15 of the hinge hardware 12 is fitted into the spherical seat 24 of the hole washer 21, the iron cover 11 is accurately positioned, and the iron cover 11 is obliquely inserted into the receiving frame 10. There is no such thing as fitting into. Moreover, when the iron cover 11 is rotated in the horizontal direction to open and close, the iron cover 11 and the receiving frame 10 do not slide, so that the iron cover 11 can be easily opened and closed with a small force.

[0018]

As described above, according to the present invention, since the hinge fitting is supported by the spherical surface with respect to the hole washer, there is no displacement of the iron cover. Various useful effects, such as that the lid can be opened and closed by rotating the iron lid in the horizontal direction without the lid being obliquely fitted into the receiving frame and without sliding the iron lid against the receiving frame. Is brought.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state in which a manhole iron cover is closed by a hinge according to the present invention.

FIG. 2 is a perspective view showing a hinge hardware in a hinge of a manhole iron cover according to the present invention.

FIG. 3 is a perspective view showing a hole washer in a hinge of a manhole iron cover according to the present invention.

FIG. 4 is a perspective view showing a bearing hardware at a hinge of a manhole iron cover according to the present invention.

FIG. 5 is a sectional view showing a state in which one end of an iron cover is slightly lifted.

FIG. 6 is a cross-sectional view showing a state where one end of the iron lid is further lifted.

FIG. 7 is a cross-sectional view showing a state in which the lock of the iron cover is released.

FIG. 8 is a cross-sectional view showing a state in which the iron cover is opened until it hits a receiving frame.

FIG. 9 is a cross-sectional view showing a state where the lower half of the hinge hardware is pulled up from the through hole of the hole washer and the iron cover is completely opened.

FIG. 10 is a cross-sectional view showing an open / closed state of an iron cover by a conventional hinge.

FIG. 11 is a perspective view showing a hinge hardware in a conventional hinge.

[Explanation of symbols]

 1: receiving frame, 2: iron cover, 3: hinge hardware, 4: pin, 5: hook, 6: stopper, 7: groove, 8: hole washer, 9: hook receiver, 10: receiving frame, 12: hinge hardware, 13: Pin, 14: Hook, 15: Spherical part, 16: Stopper, 17: Bearing, 18: Groove, 19: Bolt, 20: Nut, 21: Hole washer, 22: Through hole, 23: Hook receiver, 24: spherical seat.

Claims (1)

(57) [Claims] 1. A hinge for a manhole iron cover for connecting an iron cover fitted in a receiving frame to the receiving frame so as to be openable and closable, wherein an upper portion for connecting the iron cover and the receiving frame so as to be openable and closable is provided. An arm-shaped hinge fitting is pivotally attached to the lower surface of the end of the iron cover, and a hole washer is provided on the inner surface of the receiving frame, into which the hinge fitting is inserted. Has a spherical part on which a hook is formed,
The lower part has a stopper for preventing removal, and the hole washer has a through hole in which a lower half of the hinge metal is inserted and a spherical seat for receiving the lower part of the spherical part is formed. ,
A hinge for a manhole iron cover, wherein a hook receiver for engaging with the hook is formed on an upper surface of the hole washer between the through hole and an inner surface of the receiving frame.