JP5152989B2 - Hinge device for lid for underground structure - Google Patents

Description

The present invention relates to a hinge device for a lid for an underground structure.
As used herein, the term “underground structure lid” refers to a large iron lid, a manhole lid, a sewage jar lid for closing an opening through which underground structures, underground structure facilities, etc. in sewer facilities are connected to the ground. Or openable joint groove iron lid, power transmission iron lid, power distribution iron lid, underground conduit in the water supply facilities and gas supply facilities, and its accessories A fire hydrant lid, a water control valve lid, a gate valve lid, an air valve lid, a gas pipe lid, a water meter lid, and the like having a function as an open / close door connecting the equipment and the ground are collectively referred to.

The lid body of the lid for the underground structure is fitted to a receiving frame installed on the upper part of the underground structure such as a sewer facility, for example, and is rotatably supported by the receiving frame via a hinge device. It can be opened and closed. For example, this type of hinge device includes a hinge that connects the lid body and the receiving frame of the lid for the underground structure, and this hinge is pivotably mounted on the hinge mounting seat on the back surface of the lid body. (Patent Document 1).
Japanese Patent Laid-Open No. 11-210010

  The hinge device of Patent Document 1 requires a retainer that prevents the hinge from falling off the hinge mounting seat when the hinge is attached to the lid body. For this reason, the number of parts of the hinge device is increased by the amount of the retaining device, and not only the structure is complicated, but the retaining device is bolted to the lid body when the hinge device is assembled to the lid body. It must be fixed by welding or the like, and the hinge device cannot be easily assembled.

  The present invention has been proposed in view of the above-mentioned problems, and its purpose is to reduce the number of parts and the processes required for assembly, so that the assembly to the lid body is easy, and its opening / closing operation An object of the present invention is to provide a hinge device for a lid for an underground structure that can reliably prevent the lid body from falling off.

In order to achieve the above object, the present invention provides a hinge device for a lid for an underground structure that connects a lid body and a receiving frame that supports the lid body so as to be opened and closed.
The hinge device has a hinge mounting portion provided on the back side of the lid body, and a hinge rotatably mounted on the hinge mounting portion,
The hinge includes a spherical-shaped head and a hinge body that extends toward and through the neck portion contiguous and downward sides of the spherical head,
The spherical head has a narrow portion smaller than its outer diameter,
The hinge mounting portion extends in the radial direction of the lid body and has a mounting space having a seat for rotatably supporting the spherical head, and is open to the outer peripheral surface of the lid body and communicates with the mounting space. With access holes,
The opening width of the access hole is formed larger than the width of the narrow portion and smaller than the outer diameter of the spherical head ,
The mounting space and the access hole are respectively opened on the back side of the lid body so as to allow the hinge body to rotate in the radial direction of the lid body around the spherical head (Claim 1).

Specifically, the hinge is moved in the posture in which the longitudinal direction of the hinge body is substantially parallel to the surface of the lid body from the outer peripheral side to the center side of the lid body, thereby A head is inserted into the access hole and positioned in the mounting space;
The spherical head cannot be removed from the seat in the mounting space and the lid in a state where the hinge body is rotated about 90 degrees along the surface in contact with the outer peripheral surface of the lid body with the spherical head as the center. It is supported so as to be rotatable along the radial direction of the main body. (Claim 2).

Preferably, a convex portion is provided on one of the rotating shafts of the spherical head or the seat of the mounting space, and a concave portion for receiving the convex portion is provided on the other rotating shaft. (Claim 3).
Furthermore, the hinge device of the present invention has a hinge mounting portion provided on the back side of the lid body, and a hinge that is rotatably mounted on the hinge mounting portion.
The hinge includes a spherical head provided with a narrow portion smaller than an outer diameter thereof, and a hinge body extending downward on a side surface or a lower surface of the spherical head,
The hinge mounting portion includes a mounting space having a seat for rotatably supporting the spherical head, and an access hole that communicates with the mounting space and opens on the outer peripheral surface of the lid body.
The opening width of the access hole is formed larger than the width of the narrow portion and smaller than the outer diameter of the spherical head,
And a convex part is provided on any one rotation axis of the spherical head or the seat of the mounting space, and a concave part for receiving the convex part is provided on any other rotation axis, (Claim 4).

In the hinge device for an underground structure lid according to the first to fourth aspects of the present invention, the hinge is supported by the seat in the mounting space of the hinge mounting portion so as to be rotatable and unremovable. No separate member is required for assembly.
Therefore, the hinge device of the present invention not only reduces the number of parts, but also can easily assemble the hinge to the lid body without the need to change the attitude of the lid body, and after assembly, It is possible to reliably prevent the hinge from falling off from the lid body.

1 and 2 show a part of a lid for an underground structure, that is, its lid body 2. The lid body 2 can be fitted to a receiving frame 4 installed on the upper part of the underground structure indicated by a two-dot chain line in FIG. 1 to close the opening of the receiving frame 4. In this case, the inner peripheral surface of the receiving frame 4 And the outer peripheral surface of the lid body 2 is formed as a female and male tapered surface, respectively.
As is apparent from FIG. 2, an exterior board 8 is fitted into the lid body 2 as indicated by a two-dot chain line in FIG. 1, and the exterior board 8 has an upper surface flush with the upper surface of the lid body 2. Such an exterior panel 8 made of synthetic resin greatly contributes to the weight reduction of the lid for the underground structure. 1 and 2, reference numeral 10 indicates an attachment hole for the exterior panel 8 attached to the central recess 6 of the lid body 2 .

The outer peripheral edge of the lid body 2 insertion hole 12 for the lid opening jig such as bar or Tekagi that is used to lid opening operation of the lid body 2 is formed, the insertion hole 12 is vertically the lid body 2 It penetrates in the direction.
On the other hand, a hinge mounting portion 16 of a hinge device 14 to be described later is formed on the back surface of the outer peripheral edge of the lid body 2 that is separated from the insertion hole 12 in the diameter direction of the lid body 2.
FIG. 3 specifically shows the hinge device 14.

  The hinge device 14 further includes a hinge attachment portion 16 provided on the back side of the lid body 2 and a synthetic resin hinge 18 that is rotatably attached to the hinge attachment portion 16. The hinge 18 includes a spherical head 24 that is rotatably attached to the hinge mounting portion 16, and a hinge body 20 having a rod shape that extends downward on the side surface of the spherical head 24. In the state attached to the hinge attachment portion 16 of the lid body 2 shown in FIG. 3, the lid body 2 is positioned on the center side of the lid body 2 via the neck portion 22 that is a part of the hinge body 20. More specifically, the hinge body 20 has a bow shape that protrudes toward the outer peripheral side of the lid body 2.

The spherical head 24 is not a perfect sphere, and for example, when viewed in FIG. These flat surfaces 26 are parallel to each other, and a narrow width portion 28 having a width smaller than the outer diameter is formed on the spherical head 24. As shown in FIG. 4, the width of the narrow portion 28, that is, the distance W 1 between the flat surfaces 26 is shorter than the diameter D of the spherical head 24.
A pair of hemispherical convex portions 29 are integrally formed on the rotating shaft of the spherical head 24, and these convex portions 29 are separated from each other in the diameter direction of the spherical head 24 and parallel to the flat surface 26. Further, it is arranged on a line passing through the center of the spherical head 24.

  On the other hand, as is clear from FIG. 4, the lower end of the hinge body 20 has an inverted T shape, and includes protrusions 30 that protrude on both sides substantially parallel to the flat surface 26. 3 and 4, reference numeral 32 indicates depressions formed on the outer surfaces of the hinge body 20 and the spherical head 24. These depressions 32 reduce the weight of the hinge 18, and the hinge body 20 and the spherical head. 24 aesthetics are improved. Moreover, although not shown in figure, the lower end of the hinge main body 20 is connected with the receiving frame 4 side.

5 to 7 show details of the hinge mounting portion 16 described above.
As apparent from FIG. 5, the hinge mounting portion 16 is provided on the back side of the lid body 2, and includes a mounting space 34 having a receiving seat 44 that rotatably supports the spherical head 24 described above, and the mounting space 34. And an access hole 48 that is open to the outer peripheral surface of the lid body 2. The mounting space 34 is substantially T-shaped as shown in FIG. 6 when viewed in a cross section parallel to the back surface of the lid body 2. More specifically, the mounting space 34 is provided on the outer peripheral surface side of the lid main body 2, is connected to the radial groove 36 extending in the radial direction of the lid main body 2, and the inner end of the radial groove 36, and around the lid main body 2. The circumferential groove 38 extends in the direction, and the circumferential groove width of the circumferential groove 38 is longer than the groove width of the radial groove 36.

The radial groove 36 is formed by a pair of vertical walls 40 that are spaced apart from each other in the circumferential direction of the lid body 2 with a slightly wider interval than the hinge body 20, and the lower edge of the vertical walls 40 is the outer periphery of the back surface of the lid body 2. It is connected to the edge winding rib 42 (refer FIG. 10) protruded from. The pair of vertical walls 40 have receiving seats 44 facing each other, and these receiving seats 44 are formed of hemispherical concave surfaces, and are sized to support the spherical head 24 so as to be rotatable from both sides thereof. . A hemispherical recess 46 is formed in the center of the receiving seat 44, and the recess 46 can receive the above-described protrusion 29 of the spherical head 24.

Therefore, when the hinge 18 is assembled to the hinge mounting portion 16 of the lid body 2 as shown in FIG. 3, the convex portion 29 formed on the spherical head 24 of the hinge 18 is fitted into the concave portion 46 of the receiving seat 44 and the hinge. The upper part of the main body 20 is sandwiched between the vertical walls 40 with a slight gap. Therefore, the lid body 2 is rotated and opened in a stable state around the spherical head 24.
In order to enable assembly of the hinge 18 to the hinge mounting portion 16, an access hole 48 communicating with the mounting space 34, that is, the radial groove 36 is formed in the outer peripheral surface of the lid body 2. . The access hole 48 opens on the back side of the lid body 2 as well as the mounting space 34, and has an opening width W 2 that matches the opening width of the radial groove 36 in the circumferential direction of the lid body 2. Here, the opening width W2 is slightly larger than the distance W1 of the spherical head 24 described above, that is, the width of the narrow portion 28 thereof.

5 and 7, the access hole 48 has an arch portion 48U that extends from the ceiling wall of the radial groove 36 to the upper surface side of the lid body 2, and this arch portion 48U. Extends to the seat 44 described above. The arched ceiling portion 48U arcuate groove 50 is formed, the arcuate groove 50 is in a posture which is substantially parallel to the longitudinal direction of the hinge body 20 to the surface of the lid body 2 to form a spherical head 24 described above the convex portion 29 has a size capable of being accepted, and extends from the outer peripheral surface of the cover body 2 to the seat 4 4.

Next, the procedure for assembling the hinge 18 to the hinge mounting portion 16 will be described with reference to FIGS. 8 and 9.
First, as shown by a two-dot chain line in FIG. 8, the hinge 18 is set in a posture substantially parallel to the surface of the lid body 2, and the spherical head 24 is directed to the access hole 48 of the lid body 2. In this state, the spherical head 24 of the hinge 18 is inserted into the radial groove 36 of the mounting space 34 through the access hole 48 to a predetermined position by moving from the outer peripheral side to the center side of the lid body 2.

  Here, the spherical head 24 has a pair of flat surfaces 26 along the vertical wall 40 of the radial groove 36, and the narrow portion 28 of the spherical head 24 formed between the pair of flat surfaces 26. , That is, the distance W1 between the pair of flat surfaces 26 is smaller than the opening width W2 of the access hole 48 and the radial groove 36, and the access hole 48 has an arch portion 48U. 24 can be inserted into the radial groove 36 through the access hole 48 regardless of the presence of the spherical portion having the convex portion 29, and can be smoothly positioned in the radial groove 36 as shown by the solid line in FIG. During this insertion, one convex portion 29 of the spherical head 24 is guided through the arc groove 50 (see FIGS. 5 and 7) of the access hole 48, and the convex portion 29 obstructs the insertion of the spherical head 24. There is nothing.

Thereafter, as the hinge body 20 is erected against the lid body 2, along a surface in contact with the outer peripheral surface of the lid body 2, the hinge body 20 around the spherical head 24 is approximately 90 degrees rotation, i.e. , when the substantially 90 ° pivoting of the hinge body 20 about an axis a shown by a one-dot chain line in FIG. 8, with this rotation, as shown in FIG. 9 viewed from the back side of the cover body 2, spherical The spherical surface portion of the head 24 matches the seats 44 of the mounting space 34 and is fitted into these seats 44. At this time, each convex portion 29 of the spherical head 24 is fitted into the concave portion 46 of the receiving seat 44 on the corresponding side. Here, the protrusion of the convex portion 29 from the arc groove 50 and the fitting of the convex portion 29 into the concave portion 46 are brought about by elastic deformation of the spherical head 24, that is, the convex portion 29.

  Thereafter, from the state shown in FIG. 9, the hinge body 20 is rotated in the radial direction of the lid body 2, that is, the hinge body 20 is rotated around the axis B indicated by a dotted line in FIG. 9 around the spherical head 24. When the upper end 20a of the hinge body 20 is moved and positioned in the circumferential groove 38 of the mounting space 34, the hinge 18 is in the assembled posture shown in FIGS. In FIG. 10, reference numeral 52 indicates the opening / closing device for the insertion hole 12 described above.

  3, the spherical portion of the spherical head 24 is sandwiched between the seats 44, and the diameter D of the spherical head 24 is equal to the radial grooves 36 and the access holes 48 of the mounting space 34. Since it is larger than the opening width W1, the spherical head 24 is not pulled out from the mounting space 34 through the access hole 48, and the spherical head 24 can be reliably held in the mounting space 34.

Therefore, according to the hinge device of the present embodiment, when the hinge 18 is assembled to the lid body 2, a stopper for removing the hinge 18 is not necessary, and the number of parts can be reduced. Further, since the steps required for attaching and fixing the retainer are also unnecessary, the hinge 18 can be easily assembled.
Further, as described above, the assembly of the hinge 18 is achieved by the insertion operation of the spherical head 24 from the outer peripheral side of the lid body 2 and the rotation operation of the hinge body 20 with respect to the lid body 2. Assembling of the hinge 18 to the lid body 2 can be performed very easily and quickly while maintaining the posture with the surface of the lid body facing upward or the posture with the outer peripheral surface of the lid body 2 facing upward (the lid body 2 is erected). .

Furthermore, the convex portion 29 of the spherical head 24 and the concave portion 46 of the receiving seat 44 not only function as a further retaining member for the spherical head 24, but also as shown in FIG. 9, around the vertical axis perpendicular to the axis B. Rotation of the spherical head 24, that is, twisting of the hinge body 20 is also prevented.
The present invention is not limited to the above-described embodiment, and the specific shapes of the mounting space 34, the narrow width portion 28 of the spherical head 24, and the access hole 48 can be variously modified.

It is a top view of the lid body of the lid for underground structures of one example. FIG. 2 is a cross-sectional view of the lid main body taken along line II-II in FIG. 1. It is a side view of the hinge of the state assembled | attached to the hinge attaching part of the lid body. (A) is a front view of the hinge seen from the IVa direction in FIG. 3, and (b) is a plan view of the hinge seen from IVb in FIG. 4 (a). It is sectional drawing which showed the detail of the hinge attaching part of FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is the front view which showed the access hole of the lid body. It is a figure which shows the state by which the spherical head of the hinge was inserted in the mounting space of a hinge attaching part. It is a figure which shows the state from which the hinge stood up with respect to the lid | cover main body from the state of FIG. 8 from the back surface side of a lid | cover main body . It is the perspective view which looked at the lid body with which the hinge was assembled | attached from the back surface side.

Explanation of symbols

2 Lid body 4 Receiving frame 14 Hinge device 16 Hinge mounting part 18 Hinge 20 Hinge body 24 Spherical head 28 Narrow part 29 Protruding part 34 Mounting space 36 Radial groove 40 Vertical wall 44 Receiving seat 46 Recessing part 48 Access hole

Claims (4)

In a hinge device for a lid for an underground structure that connects a lid body and a receiving frame that supports the lid body so as to be openable and closable,
The hinge device has a hinge mounting portion provided on the back side of the lid body, and a hinge rotatably mounted on the hinge mounting portion,
The hinge includes a spherical-shaped head and a hinge body that extends toward and through the neck portion contiguous and downward sides of the spherical head,
The spherical head has a narrow portion smaller than its outer diameter,
The hinge mounting portion extends in the radial direction of the lid body and has a mounting space having a seat for rotatably supporting the spherical head, and is open to the outer peripheral surface of the lid body and communicates with the mounting space. With access holes,
The opening width of the access hole is formed larger than the width of the narrow portion and smaller than the outer diameter of the spherical head ,
The mounting space and the access hole are respectively opened on the back side of the lid body to allow the hinge body to rotate in the radial direction of the lid body around the spherical head. Hinge device for structural lid. The hinge is moved from the outer peripheral side to the center side of the lid body in a posture in which the longitudinal direction of the hinge body is substantially parallel to the surface of the lid body. To be inserted into the mounting space,
The spherical head cannot be removed from the seat in the mounting space and the lid in a state where the hinge body is rotated about 90 degrees along the surface in contact with the outer peripheral surface of the lid body with the spherical head as the center. 2. The hinge device for a lid for an underground structure according to claim 1, wherein the hinge device is supported so as to be rotatable along a radial direction of the main body.   The convex part is provided on any one rotation axis | shaft of the said spherical head or the seat of the said installation space, and the recessed part which receives the said convex part is provided on any other rotation axis. A hinge device for a lid for an underground structure as described in 1. In a hinge device for a lid for an underground structure that connects a lid body and a receiving frame that supports the lid body so as to be opened and closed
  The hinge device has a hinge mounting portion provided on the back side of the lid body, and a hinge rotatably mounted on the hinge mounting portion,
  The hinge includes a spherical head provided with a narrow portion smaller than an outer diameter thereof, and a hinge body extending downward on a side surface or a lower surface of the spherical head,
  The hinge mounting portion includes a mounting space having a seat for rotatably supporting the spherical head, and an access hole that communicates with the mounting space and opens on the outer peripheral surface of the lid body.
  The opening width of the access hole is formed larger than the width of the narrow portion and smaller than the outer diameter of the spherical head,
A convex portion is provided on one of the rotating shafts of the spherical head or the seat of the mounting space, and a concave portion for receiving the convex portion is provided on the other rotating shaft. Hinge device for lids for underground structures.

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