JP6083757B2 - Hinge device for opening lid for underground space structure - Google Patents

Description

  The present invention relates to a hinge device for an opening cover for an underground space structure that connects an opening cover that closes the ground opening of an underground space structure to a receiving frame installed in the ground opening.

Manhole connecting the sewer and ground (one underground structures), the or falling people and objects, are closed ground opening a lid to prevent the you may leak malodor. The receiving frame attached to the ground opening and the lid are connected with a chain so that the lid does not come off due to wind blowing from the manhole or mischief by a third party. However, in order to be able to open the lid, it is necessary to lengthen the chain, and if the lid and the receiving frame are connected only by such a long chain, there is a risk that the lid may be scattered far away.
Therefore, in recent years, it is common to connect one side of the lid to a receiving frame with a hinge device and provide a locking device on the other side of the lid.

There are various hinge devices for connecting the lid and the receiving frame. For example, in Patent Document 1, a hinge member that is basically long in the vertical direction is attached to the back surface of the lid body, and the inner peripheral surface of the receiving frame is attached. A hinge member having a long hole, a hinge member inserted through the long hole of the hinge seat, and a lid main body connected so as to be openable and closable with respect to the receiving frame is disclosed.
Patent Document 2 discloses that a hinge member on the receiving frame side is made up of a hinge hardware on the lid body side, and the hinge hardware is divided into a fixed shape upper member and a fixed shape lower member. The hinge structure which connected both with the chain is described.

JP 2005-336994 A JP 7-216924 A

Since the hinge device described in Patent Document 1 basically has a hinge member that is long in the vertical direction inserted through the hinge seat, if there is an inner lid or an overhanging portion at a shallow position below the lid main body, or not from closing the lid body lower end in contact with these, or provoked damage to the components, shortening the hinge member in order to avoid this result hinges member is easily escape from the hinge seat, to ensure the lid body and the receiving frame Cannot be consolidated.
The hinge structure described in Patent Document 2 can bend the lower member with the hinge fitting passed through the hinge seat, but is difficult to pass through the hinge seat because the lower member moves unstable relative to the upper member of the fixed shape. Also, there is a concern that the lower member bends in an inconvenient direction and the lid body cannot be closed smoothly.
The problem to be solved by the present invention is that an opening for an underground space structure that does not easily hit the overhanging portion of the inner lid or the receiving frame even if the hinge device of the hinge device is sufficiently long and is easy to insert the hinge device into the receiving seat. It is to provide a lid hinge device.

The present invention relates to a hinge device for connecting an opening lid that closes the ground opening of an underground space structure to a receiving frame so as to be openable and closable, comprising a receiving seat on the receiving frame side and a hinge device on the opening lid side, Extending inward from the inner peripheral surface of the receiving frame, has a long hole in the radial direction of the receiving frame, and the hinge is inserted into the long hole of the receiving seat so as to be vertically movable and rotatable, and is basically long in the vertical direction. A fixed-shaped upper member and a fixed-shaped lower member, with the upper end of the fixed-shaped upper member passing through a horizontal axis parallel to a tangent at the peripheral portion of the lower surface of the opening lid. The upper member of the fixed shape is provided with an engagement protrusion for engaging the lid with the receiving frame when the lid is lifted by wind pressure or the like from below. rotation but through the tangent parallel to the horizontal axis at the lower end of the upper member of the fixed shape Attached to ability, while inserting the hinge member into the long hole of the seat, there as a possible bent lower member of the fixed shape inward below the seat.
The lower member of the fixed shape is preferably curved so as to face inward as it approaches the lower end.
A retaining protrusion parallel to the connecting shaft may protrude from the lower end of the lower member of the fixed shape .

According to the present invention, there is an inner lid or an overhanging portion at a shallow position below the opening lid, and the lower member of the fixed shape bends inward even if the lower end of the hinge contacts when closing the opening lid. since the escape Te, or interfere with the descent of the opening lid, there is no fear of damaged parts. In addition, the lower member of the fixed shape bends only in a certain direction (inward in the radial direction of the receiving frame) with respect to the upper member of the fixed shape. Absent. Moreover, even if it is going to pull up an opening part lid | cover just above, since a hinge has sufficient length, it is hard to come off from a receiving seat, and an opening part lid | cover can be connected to a receiving frame stably.

It is a disassembled perspective view of the manhole which concerns on the Example of this invention. It is sectional drawing in the opening part lid closed state of the manhole which concerns on the Example of this invention. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a bottom view of the opening part cover which concerns on the Example of this invention. It is a top view of the receiving frame which concerns on the Example of this invention. It is a front view of the hinges which concern on the Example of this invention. It is a side view of the hinges which concern on the Example of this invention. It is a principal part perspective view in the middle of the opening part cover installation of the manhole which concerns on the Example of this invention. It is sectional drawing in the middle of opening part opening opening of the manhole which concerns on the Example of this invention. It is sectional drawing in the state which opened the opening part cover by the horizontal turning of the manhole which concerns on the Example of this invention. It is sectional drawing in the state which opened the opening part cover by the vertical inversion of the manhole which concerns on the Example of this invention.

Hereinafter, an embodiment in which the underground space structure is a manhole connecting the sewer pipe and the ground will be described in detail based on the drawings.
As shown in FIGS. 1 to 3, the manhole is composed of a rising tube 1, an opening lid 2, an inner lid 3, and a receiving frame 4. The opening lid 2 is connected to the receiving frame 4 so as to be openable and closable via a hinge device including a hinge 5 on the opening lid 2 side and a receiving seat 6 on the receiving frame 4 side.
The riser pipe 1 is buried in the ground to form a cylindrical space inside. The lower end of the riser pipe 1 leads to a sewer pipe, and the upper end is a manhole ground opening. A plurality of anchor bolts 20 and guide bolts 21 are provided at the upper end of the rising pipe 1 at equal intervals in the circumferential direction and at different positions (FIG. 1).

The opening cover 2 is a member that closes the ground opening of the manhole, and is made of a cast iron disk.
As shown in FIG. 4, a groove 7 for attaching the hinge 5 is provided on the peripheral surface of the lower surface of the opening lid 2. The groove portion 7 is long in the radial direction of the opening portion lid 2, and both end surfaces and the lower surface are open.
As shown in FIG. 1, a lock member 8 is attached on the opposite side of the groove portion 7 at the peripheral edge of the lower surface of the opening lid 2. The lock member 8 is rotatable about an axis parallel to the tangent to the opening lid 2 at the opposite peripheral edge. A flange 9 that can be engaged with the receiving frame 4 is formed at the outer end of the lock member 8, and the inner end of the lock member 8 is an operation unit 10. The lock member 8 is biased in a direction in which the flange portion 9 engages with the receiving frame 4. In addition, a tool insertion hole 11 is formed in the opening lid 2 above the operation portion 10, and the engagement between the collar portion 9 and the receiving frame 4 is released by operating the operation portion 10, and the opening lid 2 is caused. The tool for insertion can be inserted from above.

As shown in FIG. 1 and FIG. 2, the inner lid 3 is installed below the opening lid 2 with an interval, and has an inverted conical peripheral wall 22 inclined so that its diameter gradually increases toward the upper end, and a peripheral wall A flange 23 projecting outward from the upper end of 22 and a bottom plate 24 provided at the lower end of the peripheral wall 22 are provided.
A plurality of exhaust ports 25 are provided at a plurality of locations on the peripheral wall 22. The exhaust port 25 is opened and closed by a flap-type air valve that is normally closed and opens when the pressure inside the riser pipe 1 increases. A plurality of guide bolt insertion holes 26 are formed in the flange 23 at equal intervals in the circumferential direction. The bottom plate 24 is inclined to one side, and an opening 27 is formed on the lower side of the bottom plate 24. The opening 27 is provided with a damper 28 that opens when a certain load or more is applied to the upper surface.

  2 and 3, the receiving frame 4 includes an outer annular wall 29 and an inner annular wall 30, an annular upper wall 31 connecting the upper edge of the outer annular wall 29 and the upper edge of the inner annular wall 30, and an inner annular wall. A lid flange 32 projecting inward from the lower edge of the wall 30 and a support flange 33 projecting almost horizontally inward from the lower end of the outer annular wall 29 are provided. The inner diameters of the lid hanging flange 32 and the support flange 33 are substantially the same as the inner diameter of the upper end of the rising pipe 1, and the inner annular wall 30 has an inner diameter slightly larger than the outer diameter of the opening lid 2. An annular window 34 is formed between the lid flange 32 and the support flange 33.

The support flange 33 is formed with a plurality of through holes 36 through which the anchor bolt 20 and the guide bolt 21 are inserted.
A plurality of ventilation holes 37 are formed in the annular upper wall 31 to communicate the annular window 34 and the external space of the manhole. As shown in FIG. 5, a plurality of reinforcing walls 38 are installed between the annular upper wall 31 and the support flange 33 at equal intervals in the circumferential direction.
An annular ridge 41 is formed on the inner edge of the lower surface of the lid hanging flange 32 (FIG. 3).

Hinge device 5, as shown in FIGS. 3, 6 and 7, the upper end portion is an elongate member essentially vertically protruding downward is attached to the opening lid 2, the upper member of the fixed shape 17 and a lower member 18 having a fixed shape .
At the upper end portion of the upper member 17 having a fixed shape, a mounting portion 12 which is flat and bent toward the outer peripheral side of the opening portion lid 2 is formed, and the horizontal shaft 13 projects from both surfaces of the mounting portion 12. On both sides of the lower end of the fixed-shaped upper member 17 (the side where the horizontal shaft 13 projects), mounting pieces 42 are provided downward, and shaft insertion holes 43 are formed in the mounting pieces 42 respectively.
In addition, an engaging protrusion 15 that can engage with the protrusion 41 of the receiving frame 4 is formed on the outer peripheral surface of the opening lid 2 at the lower portion of the upper member 17 having a fixed shape . The engagement protrusion 15 is inclined so that the amount of protrusion gradually increases toward the upper end.

The fixed-shaped lower member 18 is curved to face inward as it approaches the lower end. The upper end of the fixed-shaped lower member 18 is provided with a protrusion 44 inserted between the mounting pieces 42 of the fixed-shaped upper member 17, and the shaft insertion hole 43 coincides with the shaft insertion hole 43 of the mounting piece 42 in the protrusion 44. Is formed. On both sides of the lower end portion of the lower member 18 having a fixed shape, a retaining projection 14 parallel to the horizontal shaft 13 protrudes.
The lower end of the fixed-shaped upper member 17 and the upper end of the fixed-shaped lower member 18 are rotatably connected via a connecting shaft 19 that passes through the shaft insertion holes 43 and 43 ′.
The hinge 5 is attached to the peripheral edge of the opening lid 2 so as to be rotatable about the tangent at the peripheral portion by engaging the horizontal shaft 13 with the walls on both sides of the groove 7.
Around the horizontal shaft 13, the fixed upper member 17 is always received by the receiving frame so that the engaging projection 15 of the hinge 5 engages the protruding frame 41 on the receiving frame side when the lid is lifted. Means for urging to the 4 side, for example, a spring and a magnet are arranged.

As shown in FIGS. 3 and 5, the receiving seat 6 is formed of a rectangular frame provided with a long hole 16 penetrating vertically, and protrudes inward from the inner peripheral surface of the receiving frame 4. The receiving seat 6 is provided at a position slightly lower than the lid hanging flange 32.
The dimension of the long hole 16 in the short axis direction is larger than the diameter of the hinge 5 and smaller than the distance between the tips of the retaining protrusions 14 formed on both side surfaces of the hinge 5. Further, the length of the diagonal line of the long hole 16 is set such that the retaining protrusion 14 can be inserted into and removed from the long hole 16 by being aligned with the diagonal line in the horizontal direction and inclined in the vertical direction.

In order to construct a manhole, the receiving frame 4 is placed on the upper end of the rising pipe 1 buried in the ground, the anchor bolt 20 and the guide bolt 21 are placed in the through hole 36, and the support flange 33 is fixed with the anchor bolt 20 and the nut. Fix it.
Next, the flange 23 of the inner lid 3 is placed on the support flange 33 of the receiving frame 4, the guide bolt 21 protruding above the support flange 33 is passed through the guide bolt insertion hole 26 of the inner lid 3, and the upper end of the guide bolt 21 is inserted. The inner lid 3 is attached to the receiving frame 4 by screwing the nut. The inner lid 3 is guided by the guide bolt 21 and can be lifted from the support flange 33 of the receiving frame 4.

Next, as shown in FIG. 8, with the upper member 17 of the fixed shape of the hinge 5 and the lower member 18 of the fixed shape extended, the opening lid 2 is raised on the receiving frame 4, and the hinge 5 The protruding direction of the retaining protrusion 14 is made to coincide with the diagonal line of the long hole 16. Then, the hinge 5 is aligned with the long hole 16 of the receiving seat 6 and the opening cover 2 is dropped, and the hinge 5 is inserted into the long hole 16 of the receiving seat 6 to form a hinge device. The hinge 5 can freely move in the vertical direction with respect to the long hole 16 and can rotate around the axis.
Next, the opening lid 2 is rotated in the horizontal direction to rotate the hinge 5 so that the retaining projection 14 intersects the long axis of the long hole 16. Then, it becomes impossible to remove the hinge 5 from the long hole 16 of the seat 6.

Thereafter, as shown in FIGS. 1 and 2, the opening lid 2 is tilted, fitted into the inner annular wall 30 of the receiving frame 4, and placed on the lid hooking flange 32.
Since there is an inner lid 3 at a shallow position below the opening lid 2, when the lower end of the hinge 5 comes into contact with the inner lid 3 in the process of lowering the opening lid 2, the hinge 5 has a curved shape. A force is applied to push upward inward. However, only the fixed-shaped lower member 18 bends inward with the connecting shaft 19 as the center, so that this force can be absorbed and the opening lid 2 can be closed smoothly.

When the ground cover opening of the manhole is closed by the opening cover 2, if the opening cover 2 is lifted straight upward, the engaging protrusion 15 of the hinge 5 is caught by the protrusion 41 of the receiving frame 4, and the opening The lid 2 cannot rise. Further, even if the engagement protrusion 15 and the protrusion 41 are disengaged due to the backlash of the opening lid 2 or the like, the hinge 5 has a sufficient length and is difficult to come off from the seat 6.
In addition, the flange portion 9 of the lock member 8 is engaged with the protrusion 41 of the receiving frame 4 at the end of the opening lid 2 opposite to the connecting portion of the hinge structure.

When removing the opening lid 2, first, a tool is inserted from above the opening lid 2 through the tool insertion hole 11, and the operation portion 10 of the lock member 8 is lifted to raise the ribs 9 and the protrusions 41 of the receiving frame 4. Release the engagement.
Next, the tool inserted into the tool insertion hole 11 is lifted, and as shown in FIG. 9, the opening lid 2 is lifted upward on the opposite side of the hinge device, and the opening lid 2 is placed on the receiving frame 4. At this time, the lower member 18 of the fixed shape of the hinge 5 that has been bent hits the lower surface of the seat 6 and is extended as the opening lid 2 rises, and the hinge 5 is centered on the horizontal shaft 13. And rotated in the direction of the outer periphery of the opening lid 2 and inserted in a state inclined with respect to the long hole 16.
Next, after the lid 2 is erected around the hinge device, the lid 2 is rotated horizontally so that the protruding direction of the retaining projection 14 of the hinge 5 coincides with the diagonal line of the long hole 16, and the opening lid 2 is left as it is. Put it on top.
Thereafter, the opening lid 2 is rolled and the hinge 5 is pulled out from the long hole 16.

When opening the opening lid 2 by turning it horizontally from the state of FIG. 9, the tool is pulled with the tool inserted into the tool insertion hole 11, and the opening lid 2 is moved along the upper surface of the receiving frame 4 as shown in FIG. 10. Rotate horizontally 180 degrees. At this time, the hinge 5 of the hinge device rotates while being inclined in the long hole 16 of the seat 6.
When opening the opening cover 2 by vertically reversing it from the state of FIG. 9, after pulling out the tool inserted into the tool insertion hole 11, the end of the opening cover 2 on the side of the lock member 8 is lifted and shown in FIG. As described above, the opening lid 2 is turned over with the hinge device as the center.
In either case, the opening lid 2 can be closed through the reverse process.

  In addition, the opening part lid | cover of a manhole may be comprised with the main cover and the sub cover which opens and closes the entrance formed in the main cover. In this case, the receiving frame of the ground opening and the main lid can be connected by the hinge device of the present invention, and the receiving portion provided on the main lid and the child lid can be connected by a similar hinge device.

DESCRIPTION OF SYMBOLS 1 Startup pipe 2 Lid 3 Middle lid 4 Receiving frame 5 Hinge tool 6 Seat 7 Groove part 8 Locking member 9 Locking part 10 Operation part 11 Tool insertion hole 12 Mounting part 13 Horizontal shaft 14 Retaining protrusion 15 Engaging protrusion 16 Long hole 17 Fixed shape upper member 18 Fixed shape lower member 19 Connecting shaft 20 Anchor bolt 21 Guide bolt 22 Peripheral wall 23 Mounting flange 24 Bottom plate 25 Exhaust port 26 Guide bolt insertion hole 27 Opening 28 Damper 29 Outer annular wall 30 Inner annular wall 31 Annular Upper wall 32 Lid flange 33 Support flange 34 Annular window 36 Through hole 37 Vent hole 38 Reinforcing wall 41 Projection strip 42 Mounting pieces 43, 43 Shaft insertion hole 44 Projection

Claims (2)

A hinge device for connecting an opening lid for closing the ground opening of an underground space structure to a receiving frame so as to be openable and closable, comprising a receiving seat on the receiving frame side and a hinge on the opening lid side,
The receiving seat projects inward from the inner peripheral surface of the receiving frame, has a long hole in the radial direction of the receiving frame,
The hinge is basically a member that is long in the vertical direction and is inserted into the elongated hole of the seat so as to be vertically movable and rotatable, and comprises a fixed-shaped upper member and a fixed-shaped lower member ,
The fixed shape of Rutotomoni upper end of the upper member is rotatably mounted via a parallel horizontal axis and tangent at the periphery portion to the lower surface peripheral edge portion of the opening cover, the upper member of the fixed shape and receiving frame vertically With an engaging protrusion that engages with
The fixed shape of Rutotomoni upper end of the lower member is rotatably mounted through the tangent parallel to the connecting shaft to the lower end of the upper member of the fixed shape, the lower member of the fixed shape faces inwardly toward the lower end Is curved,
A hinge device for an opening cover for an underground space structure, wherein the lower member of the fixed shape can be bent inwardly under the seat in a state where the hinge is inserted into the long hole of the seat.   2. The hinge device for an opening cover for an underground space structure according to claim 1, wherein the upper member of the fixed shape is always urged toward the receiving frame at the position of the horizontal axis at the upper end.

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