JP3406498B2 - 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 makes it possible to shorten the protruding length of the hinge of the iron lid for a manhole, particularly the hole washer into which the hinge metal is inserted, from the inner surface of the receiving frame.
The present invention relates to a hinge for an iron lid for a manhole, which can increase the effective diameter of a receiving frame.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Laid-Open Publication No. 6-248660 discloses a hinge for an iron lid for a manhole, which can open and close the iron lid with a small force and accurately position the iron lid when the lid is closed. . The conventional hinge will be described below with reference to the drawings.

FIG. 9 is a partial sectional view showing a closed state of an iron lid having a conventional hinge, FIG. 10 is a perspective view showing a hinge hardware of a conventional hinge, and FIG. 11 is a perspective view showing a bearing hardware of a conventional hinge. FIG. 12 is a partial cross-sectional view showing a state in which one end of a conventional iron lid provided with a hinge is slightly lifted, and FIG. 13 is a partial cross-sectional view showing a state in which the iron lid is unlocked.

In FIGS. 9 to 13, 1 is a receiving frame and 2 is a receiving frame.
Is an iron lid 3 fitted in the receiving frame 1, and 3, as shown in FIG. 10, is an arm-shaped hinge metal member for connecting the iron lid 2 and the receiving frame 3 in an openable and closable manner. The hinge metal fitting 3 has a pin 4 supported by a bearing metal fitting 8 to be described later on the upper part,
It has a spherical portion 6 in which a hook 5 that engages with a hook receiver 15 to be described later is formed, and a stopper 7 for preventing retention from a hole washer 12 to be described later is provided in the lower portion.

As shown in FIG. 11, reference numeral 8 denotes a pair of bearing metal members fixed to the lower surface of the end portion of the iron lid 2 with a space therebetween.
Grooves 9 into which the pins 4 of the hinge hardware 3 are inserted are formed. The pin 4 inserted in the groove 9 is a bolt 10,
A nut 11 (only one of which is shown) prevents the nut 9 from coming out. The hinge hardware 3 is pivotally attached to the lower surface of the end portion of the iron lid 2 by the pair of bearing hardware 8.

Reference numeral 12 is a hole washer which is horizontally provided on the inner surface of the receiving frame 1 and into which the hinge metal 3 is inserted. The hole washer 12 has a through hole 14 in which the lower half part of the hinge 3 is inserted and a spherical seat 13 for receiving the lower part of the spherical portion 6 is formed, and between the through hole 14 and the inner surface of the receiving frame 1. A hook receiver 15 that engages with the hook 5 is formed on the upper surface of the hole washer 12.

According to the conventional hinge constructed as described above, the iron lid 2 is opened and closed as follows.
That is, in order to open the lid, as shown in FIG. 12, one end of the iron lid 2 is slightly lifted by a hook or the like from the closed state of FIG. As a result, the hinge fitting 3 is pushed from left to right in FIG. 12, and the spherical portion 6 of the hinge fitting 3 is pushed into the spherical seat 13 of the hole washer 12.
Fit inside. The spherical portion 6 is the spherical seat 13 of the hole washer 12.
When it is fitted inside, the hook 5 of the spherical portion 6 becomes the hole washer 1
The iron cover 2 is unlocked by disengaging from the hook receiver 15 of No. 2. Next, after pulling up the iron lid 2 further, the iron lid 2 can be opened by reversing the iron lid 2 by 180 ° around the pin 4 of the hinge metal piece 3 to open the lid. At this time, since the stopper 7 of the hinge fitting 3 engages with the through hole 14 of the hole washer 12, the hinge fitting 3 does not come out of the hole washer 12.

On the other hand, to open the iron lid 2 by horizontally rotating it, as shown in FIG. 13, the spherical portion 6 is fitted into the spherical seat 13 of the hole washer 12, and then the iron lid 2 is opened. Can be turned horizontally. The horizontal swing of this iron lid 2
Since the spherical portion 6 of the hinge hardware 3 is fitted into the spherical seat 13 of the hole washer 12, smooth operation can be performed with a small force, and in particular, the iron lid 2 is not displaced when the lid is closed. As a result, there is no fear that the iron cover 2 will be obliquely fitted into the receiving frame.

[0009]

The problems of the above-mentioned conventional hinge will be described with reference to the principle diagram of FIG. In FIG. 14, each number is the same as in FIGS. 9 to 13. As shown in FIG. 14, according to the conventional hinge, the hinge hardware 3 having the length (l) is the hole washer 1 having the length (L).
By rotating the tip 2 (O) in the clockwise direction in the figure, the iron lid 2 is lifted by the height (A), which allows the iron lid 2 to be opened by horizontal rotation. here,
In order to widen the effective diameter of the receiving frame 1, it is necessary to make the projecting length (L) of the hole washer 12 from the inner surface of the receiving frame 1 as short as possible. Shortening the protruding length (L) of the hole washer 12 becomes more important as the bore of the receiving frame 1 becomes smaller. Therefore, if the length of the hole washer 12 is simply shortened and the tip (O) is brought closer to the receiving frame 1 side, the projecting length (L) of the hole washer 12 can be shortened, but the lid is opened. It is not possible to secure the height (A) required for horizontal turning of the iron lid 2 at this time.

Therefore, an object of the present invention is to ensure a height (A) required for horizontal turning of the iron lid 2 when the lid is opened, and to make the protruding length of the hole washer from the inner surface of the receiving frame. (B)
The object of the present invention is to provide a hinge for an iron lid for a manhole, which can be shortened only by the above, and thus can increase the effective diameter of the receiving frame.

[0011]

The invention according to claim 1 is
An arm-shaped hinge metal member having an upper portion pivotally attached to the lower surface of the end portion of the iron lid for connecting the iron lid and the receiving frame into which the iron lid is fitted in an openable and closable manner, and protrudingly provided on the inner surface of the receiving frame. Was
It consists of a hole washer into which the hinge hardware is inserted, the hinge hardware has a spherical portion in which a hook is formed in the central portion, and has a stopper for preventing slip-out prevention in the lower portion,
The hole washer has a through hole in which a lower half of the hinge is inserted and a spherical seat for receiving the lower part of the spherical portion is formed. A hook that engages with the hook is provided inside the receiving frame. In the hinge of the iron lid for a manhole in which a receiver is formed, the spherical seat is composed of a lower spherical seat and an upper spherical seat, the lower spherical seat is formed on the inner surface side of the receiving frame, and the upper spherical seat is Formed at a distance from the lower spherical seat and obliquely above the lower spherical seat, and the spherical portion fits into the lower spherical seat when the lid is closed, and the upper spherical seat is opened when the lid is opened. It is characterized in that it fits inside.

The invention according to claim 2 is characterized in that a convex portion is formed on an upper portion of the hinge metal member so as to abut against a lower surface of the iron lid when the lid is closed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, one embodiment of the present invention will be described.
A description will be given with reference to the drawings. FIG. 1 is a partial cross-sectional view showing a closed state of an iron lid provided with this invention hinge, FIG. 2 is a perspective view showing a bearing metal of this invention hinge, and FIG. 3 is a hole washer of this invention hinge. FIG. 5 is a plan view, FIG. 4 is a partial cross-sectional view showing a state in which the iron lid provided with the hinge of the invention is unlocked
FIG. 6 is a partial sectional view showing a state in which the spherical part of the hinge metal of the invention hinge is fitted into the upper spherical seat of the hole washer, and FIG. 6 shows the iron lid equipped with the hinge of the invention by pivoting in the horizontal direction. FIG. 7 is a partial cross-sectional view showing a process of covering the iron cover with the hinge of the present invention, and FIG. 7 is a partial cross-sectional view showing a process of opening the iron cover with the hinge of the present invention by 180 ° inversion. 180
FIG. 6 is a partial cross-sectional view showing a state in which the lid is inverted and opened.

1 to 8, 1 is a receiving frame, 2 is
As shown in FIG. 2, the iron lid 3 fitted in the receiving frame 1 is an arm-shaped hinge metal member for connecting the iron lid 2 and the receiving frame 3 in an openable and closable manner. The hinge hardware 3 has a pin 4 supported by a bearing metal 8 described later on the upper portion, a spherical portion 6 formed with a hook 5 that engages with a hook receiver 15 described later on the central portion, and a lower portion on the lower portion. It has a stopper 7 for preventing the hole washer 12 from being pulled out, which will be described later. If the convex portion 3A is formed on the upper part of the hinge hardware 3, when the lid is closed, as shown in FIG.
As shown in FIG. 3, the convex portion 3A is pressed against the lower surface of the iron lid 2, and the spherical portion 6 of the hinge metal member 3 is surely pressed from the upper spherical seat 13B of the hole washer 12 described later to the lower spherical seat 13A. There is no fear that the iron lid 2 will be closed when the spherical portion 6 is fitted into the upper spherical seat 13B of the hole washer 12. Moreover, it is possible to prevent the hinge hardware 3 from swinging after the lid is closed.

As shown in FIG. 11, reference numeral 8 is a pair of bearing metal members fixed to the lower surface of the end of the iron lid 2 with a space therebetween.
Grooves 9 into which the pins 4 of the hinge hardware 3 are inserted are formed. The pin 4 inserted in the groove 9 is a bolt 10,
The nut 11 prevents the groove 9 from coming out. The hinge hardware 3 is moved to the iron lid 2 by the pair of bearing hardware 8.
Is axially attached to the lower surface of the end of the.

As shown in FIG. 3, reference numeral 12 denotes a hole washer which is provided on the inner surface of the receiving frame 1 and into which the hinge metal 3 is inserted. The lower half of the hinge hardware 3 is inserted into the hole washer hardware 12,
It has a lower spherical seat 13A and an upper spherical seat 13B that receive the lower part of the spherical portion 6. The lower spherical seat 13A and the upper spherical seat 13B communicate with each other through a through hole 14, and the upper spherical seat 13B is formed at a distance from the lower spherical seat 13A and obliquely above the lower spherical seat 13A. Reference numeral 15 denotes a hook receiver that is formed inside the receiving frame 1 and that engages with the hook 5.

According to the hinge of the present invention configured as described above, the iron lid 2 is opened and closed as follows. That is, to open the lid, from the closed state of FIG. 1 in which the spherical portion 6 of the hinge metal fitting 3 is fitted into the lower spherical seat 13A of the hole washer 12, as shown in FIG. As shown in FIG. 4, the one end is slightly lifted with a handcuff or the like to pull up the spherical portion 6 of the hinge hardware 3 from the lower spherical seat 13A of the hole washer 12. As a result, the hook 5 of the hinge hardware 3 is disengaged from the hook receiver 15 and the locking of the iron lid 2 is released.
Next, as shown in FIG. 5, the iron lid 2 is further pulled up to fit the spherical portion 6 of the hinge metal fitting 3 into the upper spherical seat 13B of the hole washer material 12. Then, as shown in FIG. 8, the lid can be opened by rotating the iron lid 2 by 180 ° around the pin 4 of the hinge hardware 3. At this time, since the stopper 7 of the hinge fitting 3 engages with the through hole 14 of the hole washer 12, the hinge fitting 3 does not come out of the hole washer 12.

On the other hand, in order to horizontally rotate the iron lid 2 to open it, as shown in FIG. 5, the spherical portion 6 is fitted into the upper spherical seat 13B of the hole washer 12 and then the iron lid 2 is opened. 2 may be turned horizontally. Since the spherical portion 6 of the hinge fitting 3 is fitted into the upper spherical seat 13B of the hole washer 12, the iron lid 2 can be swung in the horizontal direction smoothly with a small force, and in particular, the lid can be closed. Since the position of the iron cover 2 does not sometimes shift, there is no fear that the iron cover 2 will be obliquely fitted into the receiving frame.

Moreover, by constructing the spherical seat by the lower spherical seat 13A and the upper spherical seat 13B, the height (A) required for the horizontal turning of the iron lid 2 can be secured, and from the inner surface of the receiving frame. The projecting length of the hole washer can be shortened by (B). That is, as shown in FIG. 14, instead of shortening the projecting length of the hole washer by (B), the spherical washer 6 into which the spherical portion 6 of the hinge metal 3 is fitted at the time of closing the lid is provided at a portion close to the receiving frame 1. The lower spherical seat 13A is formed at a position lower by (A) than the position of the upper spherical seat 13B.
Then, when the lid is closed, the spherical portion 6 of the hinge metal fitting 3 is fitted into the lower spherical seat 13A, and when the lid is opened, the spherical portion 6 of the hinge hardware 3 is fitted into the upper spherical seat 13B. The height (A) can be secured, and the protruding length of the hole washer from the inner surface of the receiving frame can be shortened by (B).

[0020]

As described above, according to the present invention, the spherical seat into which the spherical portion of the hinge metal fitting is fitted is constituted by the lower spherical seat and the upper spherical seat, and the spherical portion of the hinge metal fitting is closed when the lid is closed. By fitting it into the lower spherical seat and then into the upper spherical seat when opening the lid, the effect of the conventional hinge, that is, the hinge hardware is supported on the spherical surface with respect to the hole washer, the position of the iron lid shifts. The iron lid does not slantly fit into the receiving frame when the lid is closed, and the iron lid is rotated horizontally to open and close without sliding the iron lid with respect to the receiving frame. Of course, it is possible to shorten the protruding length of the hole washer into which the hinge hardware is inserted from the inner surface of the receiving frame, thus increasing the effective diameter of the receiving frame, and further, the hinge. Forming a convex part on the top of the hardware Therefore, to ensure the spherical portion of the hinge fittings can be fitted into the lower spherical inside seat, and results in further useful advantage of the ability to prevent the swing hinge fittings after closure.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a closed state of an iron lid provided with a hinge of the present invention.

FIG. 2 is a perspective view showing a bearing metal member of the hinge of the present invention.

FIG. 3 is a plan view showing a hole washer of the hinge of the present invention.

FIG. 4 is a partial cross-sectional view showing a state where the iron lid provided with the hinge of the present invention is unlocked.

FIG. 5 is a partial cross-sectional view showing a state where the spherical portion of the hinge metal member of the invention hinge is fitted into the upper spherical seat of the hole washer member.

FIG. 6 is a partial cross-sectional view showing a process of horizontally rotating an iron lid provided with the hinge of the present invention to open the lid.

FIG. 7 is a partial cross-sectional view showing a process of reversing the iron lid provided with the hinge of the present invention by 180 ° and opening the lid.

FIG. 8 is a partial cross-sectional view showing a state in which the iron lid provided with the hinge of the present invention is inverted by 180 ° and opened.

FIG. 9 is a partial cross-sectional view showing a closed state of a conventional iron lid provided with a hinge.

FIG. 10 is a perspective view showing a hinge hardware of a conventional hinge.

FIG. 11 is a perspective view showing a conventional hinge metal fitting.

FIG. 12 is a partial cross-sectional view showing a state in which one end of a conventional iron lid provided with a hinge is slightly lifted.

FIG. 13 is a partial cross-sectional view showing a state where the iron lid is unlocked.

FIG. 14 is a principle view of the hinge of the present invention.

[Explanation of symbols]

1: Received frame 2: Iron lid 3: Hinge hardware 4: Pin 5: Hook 6: Spherical part 7: Stopper 8: Bearing hardware 9: groove 10: Bolt 11: Nut 12: Hole washer 13: Spherical seat 13A: lower spherical seat 13B: upper spherical seat 14: Through hole 15: Hook receiver

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Claims (2)

(57) [Claims] 1. An arm-shaped hinge metal member having an upper portion pivotally attached to a lower surface of an end portion of the iron lid, for connecting the iron lid and a receiving frame into which the iron lid is fitted in an openable and closable manner, and the receiving frame. It consists of a hole washer into which the hinge hardware is inserted, which protrudes on the inner surface, and the hinge metal has a spherical portion with a hook formed at the center, and a stopper for preventing slip-out prevention at the bottom. The hole washer has a through hole in which a lower half part of the hinge metal part is inserted and a spherical seat for receiving the lower part of the spherical part is formed, and the hook is provided inside the receiving frame. In the hinge of the iron lid for a manhole, in which a hook receiver that engages with is formed, the spherical seat includes a lower spherical seat and an upper spherical seat, and the lower spherical seat is formed on the inner surface side of the receiving frame, The upper spherical seat is spaced from the lower spherical seat and the lower spherical seat. An iron for manhole, which is formed obliquely above the seat and is characterized in that the spherical portion is fitted into the lower spherical seat when the lid is closed and fitted into the upper spherical seat when the lid is opened. Hinges on the lid. 2. The hinge according to claim 1, wherein a protrusion that abuts a lower surface of the iron lid when the lid is closed is formed on an upper portion of the hinge hardware.