Hinge structure for cover of underground structure

Abstract

To provide a hinge structure that facilitates the opening and closing operation of a cover body.SOLUTION: A hinge structure of a cover for an underground structure in which a hinge member is switchable between a fully closed state in which an opening is closed by a cover body and a fully open state in which the opening is fully opened by rotating the cover body upward from the fully closed state via the hinge member. A receiving frame includes: a cover mounting portion for mounting the cover body; a hinge mounting portion arranged around the cover mounting portion for mounting the hinge member; and a guide wall capable of guiding the hinge member in a vertical direction. An upper end portion of the hinge member is swingably supported on an installation portion of the cover body via a substantially horizontal shaft member above the hinge mounting portion. On a lower end side of the hinge member, on the lower side of the hinge mounting portion, an extended portion bent from the upper end portion is extended so as to fit in a storage space below the hinge mounting portion over the fully closed state and the fully opened state of the cover body. The hinge mounting portion has a restricting member capable of restricting the upward movement of the extended portion when the cover body is fully opened.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a hinge structure for a cover for an underground structure, for example, a hinge structure for opening and closing a cover body relative to a receiving frame in a grating cover used on an expressway or an ordinary road. [Background technology]

[0002] Patent Document 1 describes a hinge structure for this type of cover for underground structures. As shown in Figure 3 of Patent Document 1, this hinge structure consists of a cover body, a receiving frame that closes the opening so that it can be opened and closed by the cover body, and a hinge that connects the cover body and the receiving frame.

[0003] The hinge structure is formed as a hinge device from a first hinge member and a second hinge member. The first hinge member has a slide slot for connection with the second hinge member opened on its side surface and a first hinge portion formed at its end that is pivoted to a recessed receiving seat formed on the inner periphery of the receiving frame. The second hinge member has a slide engagement portion formed at one end that slidably engages with the slide slot opened on the side surface of the first hinge member and a second hinge portion formed at the other end that is pivoted to a support portion formed on the periphery of the back surface of the lid main body. The support portion has an inner diameter whose width in the closed state is slightly larger than the diameter of the second hinge portion.

[0004] In short, in the hinge structure of Patent Document 1, the hinge device comprises a first hinge member having a sliding slot and a first hinge portion, and a second hinge member having a sliding engagement portion that slidably engages with the sliding slot and is pivotally supported on the lid body via the second hinge portion, and is pivotally supported on a receiving seat on the inner periphery of the receiving frame, allowing the lid body to be opened and closed relative to the opening of the receiving frame. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 2649314 Summary of the Invention [Problem to be solved by the invention]

[0006] However, with the hinge structure of Patent Document 1, for example, when opening the lid body, the hinge must slide the sliding engagement portion of the second hinge member into the sliding slot of the first hinge member from the closed state to open the lid body, and when lifting the lid body, the sliding engagement portion must be further slid onto the end of the sliding slot to set it in the open state, which makes it difficult to operate the lid body (see Figures 10 to 13 of Patent Document 1).

[0007] SUMMARY OF THE INVENTION An object of the present invention is to provide a hinge structure for a lid for an underground structure that allows for easy opening and closing of the lid body. [Means for solving the problem]

[0008] The present invention relates to a hinge structure for a lid for an underground structure, which comprises a receiving frame, a lid body capable of opening and closing an opening formed in the receiving frame and opening in the vertical direction, and a hinge member supporting the lid body so that it can be opened and closed relative to the opening, and the hinge member is switchable between a fully closed state in which the opening is closed by the lid body and a fully open state in which the opening is fully opened by rotating the lid body upward from the fully closed state via the hinge member, and the receiving frame comprises a lid mounting portion to which the lid body is attached, a hinge mounting portion disposed around the lid mounting portion to which the hinge member is attached, and a hinge member supporting the hinge member in the vertical direction. a guide wall that can be guided in the upward direction, the upper end side of the hinge member being pivotally supported on the installation portion of the lid body above the hinge mounting portion via a substantially horizontal support shaft member so as to be swingable, and the lower end side of the hinge member being extended below the hinge mounting portion by an extension portion that is bent toward the upper end side so as to fit into the storage space below the hinge mounting portion when the lid body is in the fully closed and fully open states, and the hinge mounting portion being equipped with a limiting member that can limit the upward movement of the extension portion when the lid body is in the fully open state.

[0009] In the hinge structure for an underground structure lid having the above-described configuration, the receiving frame is provided with a guide wall capable of guiding the hinge member in the vertical direction, the upper end side of the hinge member is supported by the installation portion of the lid body via the support shaft member, and the lower end side of the hinge member is extended with an extension portion that is bent inward of the receiving frame relative to the upper end side so as to fit into the storage space below the hinge mounting portion when the lid body is in the fully closed state or the fully open state. Therefore, the support shaft member moves in the vertical direction to operate the lid body between the fully closed state and the fully open state, and the lid body rotates around the support shaft member, making it easy to open and close the lid body. [Effects of the Invention]

[0010] According to the hinge structure of the underground structure lid of the present invention, the lid body can be rotated in the vertical direction of the receiving frame via the hinge member to operate between a fully closed state and a fully open state, making it easy to open and close the lid body. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a plan view of a groove cover illustrating one embodiment of the present invention. [Figure 2] 2 is a cross-sectional view of the groove cover in the width direction, taken along the line Z1-Z1 in FIG. 1. [Figure 3] 2 is a longitudinal cross-sectional view of the groove cover, taken along the line Z2-Z2 in FIG. 1; [Figure 4] 10 is a cross-sectional view of the protrusion of the groove cover, taken along the line Z3-Z3. [Figure 5] 1A, 1B, and 1C are views of the hinge member alone, in which FIG. 1A is a front view, FIG. 1B is a plan view, and FIG. 1C is a side view from the stopper side. [Figure 6] 4 is a cross-sectional view showing the recess of the groove cover, taken along the line Z4-Z4. [Figure 7] FIG. 2 is a partially cutaway front view of the lid body in a fully closed state. [Figure 8] FIG. 2 is a partially cutaway front view of the lid body in an intermediate state. [Figure 9] FIG. 2 is a partially cutaway front view of the lid body in an intermediate state. [Figure 10]FIG. 2 is a partially cutaway front view of the lid body in a fully open state. DETAILED DESCRIPTION OF THE INVENTION

[0012] A hinge structure for a cover for an underground structure according to one embodiment of the present invention will be described below with reference to Figures 1 to 10. The hinge structure of this embodiment is a hinge structure for a groove cover 1 installed on a highway, for example, as shown in Figure 1.

[0013] First, we will explain the general configuration of the gutter cover 1. As shown in Figures 1 to 3, the gutter cover 1 is placed above the road gutter 1A and includes a receiving frame 3 that is rectangular in plan view and embedded in the road surface R, a lid body 5 that is rectangular in plan view and can open and close an opening 4 formed in the receiving frame 3, and a plurality of hinge members 6 that support the lid body 5 relative to the opening 4 so that it can be opened and closed.

[0014] First, we will explain the configuration of the receiving frame 3. In this embodiment, the receiving frame 3 is formed in a rectangular shape in plan view, with different lengths in the width direction B and the longitudinal direction L. Furthermore, the receiving frame 3 has an opening 4 (opening space) at its center, which is a rectangular opening in plan view.

[0015] As shown in Figure 2, the receiving frame 3 has a horizontal width wall 7 and a vertical width wall 8 on both sides in the width direction B. The horizontal width wall 7 is a horizontal member that is buried in the road surface R when the ditch cover 1 is in use and supports the weight of the road surface R. A plurality of fixing walls 7a are formed in the vertical direction in the longitudinal direction L of the horizontal width wall 7. Anchors 9 (see Figures 1, 7 to 10) are passed through the fixing walls 7a, and the anchors 9 are fixed to the upper surface of the side ditch 1A. In this way, the receiving frame 3 is fixed to the upper surface of the side ditch 1A.

[0016] The width vertical wall 8 is configured to rise from the end of the width horizontal wall 7 in the width direction B. The upper end surface 8a of the width vertical wall 8 is exposed from the road surface R and is a member that supports the road surface R from the back surface (outside in the width direction B).

[0017] Furthermore, a width-direction lid hook 10 is formed to protrude inward at an intermediate position on the inside of the width vertical wall 8, i.e., at a position below the upper end surface 8a of the width vertical wall 8. This width-direction lid hook 10 is a member that prevents the lid body 5 from sinking.

[0018] As shown in FIG. 3, the receiving frame 3 has a longitudinal horizontal wall 11 and a longitudinal vertical wall 12 on both sides in the longitudinal direction L. The longitudinal horizontal wall 11 is a horizontal member extending inward in the longitudinal direction L. The longitudinal vertical wall 12 stands upright from the outer end of the longitudinal horizontal wall 11 in the longitudinal direction L, and the upper end surface 12a of the longitudinal vertical wall 12 is exposed from the road surface R and is a member that supports the road surface R from the back surface (outside of the longitudinal direction L). In addition, the upper end surface 8a of the width vertical wall 8 and the upper end surface 12a of the longitudinal vertical wall 12 are at the same position (height) and are approximately horizontal to each other.

[0019] A longitudinal lid hook 13 is formed to protrude inward at an intermediate position on the inside of the longitudinal vertical wall 12, i.e., at a position below the upper end surface 12a of the longitudinal vertical wall 12. This longitudinal lid hook 13 is a member that prevents the lid body 5 from sinking.

[0020] The widthwise vertical wall 8 and the lengthwise vertical wall 12 are integrally formed. The widthwise lid hook 10 and the lengthwise lid hook 13 are also integrally formed, with the upper end surfaces of both lid hooks being approximately horizontal and positioned at the same height, and functioning to hold the lid main body 5 in a horizontal position. That is, a tapered surface is formed on the inner surface of the receiving frame 3, thereby forming a lid mounting portion 14 for mounting (supporting) the lid main body 5.

[0021] The receiving frame 3 is provided with hinge mounting portions 15 for mounting the hinge members 6. The hinge mounting portions 15 are arranged on one side of the lid main body 5 in the width direction B and on both ends in the longitudinal direction L in order to mount the lower end sides of the hinge members 6. Since each hinge mounting portion 15 has the same configuration, the configuration of one will be explained and then used as a substitute for the configuration of the other hinge mounting portion 15. However, before explaining the configuration of the hinge mounting portions 15, it is appropriate to explain the configuration of the hinge members 6, so the configuration of the hinge members 6 will be explained.

[0022] In this embodiment, the hinge members 6 are provided at two locations in the longitudinal direction L on one side of the width direction B, and since each has the same configuration, the configuration of one hinge member 6 is substituted for the configuration of the other hinge member 6.

[0023] As shown in Fig. 5, the hinge member 6 integrally comprises an upper end side 6A and a lower end side 6B, and when the lid main body 5 is attached (see Fig. 6), as shown in Fig. 5(a), it is formed into a substantially L-shape when viewed from the side in the width direction B. Furthermore, the hinge member 6 has a predetermined length in the longitudinal direction L.

[0024] Specifically, the upper end side 6A of the hinge member 6 includes a head portion 16 that is long in the width direction B, and a neck portion 17 that extends downward from the center of the head portion 16 in the width direction B. The head portion 16 is formed in a substantially quadrangular shape in a side view, and the four corners are formed in an arc shape.

[0025] The head 16 is central in the width direction B and has a shaft hole 16a in the vertical direction. A substantially horizontal support shaft member 18 protruding on both sides in the longitudinal direction L can pass through this shaft hole 16a. This support shaft member 18 is formed separately from the head 16 and is detachable from the head 16. The support shaft member 18 is formed in a cylindrical shape. One end of the upper end surface of the head 16 in the width direction B is an inclined surface 16b, and the other end is a horizontal surface 16c. This inclined surface 16b is inclined downward toward one end side in the width direction B.

[0026] The neck portion 17 is set to have a smaller dimension in the width direction B than the head portion 16, and hangs down at an angle of 90° from the center of the width direction B of the head portion 16. Furthermore, the center of the neck portion 17 in the width direction B and the center of the support shaft member 18 coincide in the up-down direction.

[0027] An extension portion 19 is provided on the lower end side 6B of the hinge member 6. The extension portion 19 extends from the lower end of the neck portion 17 to the other side (inward) in the width direction B, and its tip extends beyond the inner end of the head portion 16. The extension portion 19 is formed by bending at an angle of 90° from the lower end of the neck portion 17.

[0028] A stopper 20 is formed on the tip side of the extension portion 19 along the longitudinal direction L. The stopper 20 is a member that engages from below toward above with a horizontal wall 27 of the hinge mounting portion 15, which will be described later. As shown in FIG. 5(b), the stopper 20 is a substantially cylindrical member that is along the longitudinal direction L, and as shown in FIG. 5(c), the center in the longitudinal direction L has a large circular cross section, and the opposite ends have smaller circular cross sections. The configuration of the hinge member 6 has been described above.

[0029] In this way, the hinge member 6 has an upper end side 6A and a lower end side 6B, and when pivotally supported on the support shaft member 18, the upper end side 6A and the lower end side 6B are arranged in a well-balanced manner so that the hinge member 6 does not tilt toward either the upper end side 6A or the lower end side 6B relative to the support shaft member 18, or the extension portion 19 side is formed to be heavy. In this embodiment, the extension portion 19 side is formed to be heavy.

[0030] Returning to the hinge mounting portions 15 formed on the receiving frame 3, as described above, each hinge mounting portion 15 has the same configuration. As shown in Figures 6 and 7, the hinge mounting portions 15 are integrally formed on the inside of the width vertical wall 8 and the long vertical wall 12. The hinge mounting portions 15 include a recess 21 integrally formed on the inside of the width vertical wall 8 and the long vertical wall 12, and a protrusion 22 formed further inward of the recess 21 and protruding above the recess 21.

[0031] The recess 21 has a horizontal upper wall 23. The upper wall 23 is positioned higher than the widthwise lid hook 10, and the upper end surface 23a of the upper wall 23 is flat. The upper wall 23 also has a neck hole 24 that penetrates the upper end side 6A of the hinge member 6, i.e., the neck portion 17. The neck hole 24 is formed in a rectangular shape in a plan view, and the hinge member 6 can move up and down by inserting the neck portion 17 into the neck hole 24. Below the recess 21, a recess storage space 25 is arranged for guiding the neck portion 17 in the up and down direction.

[0032] The protrusion 22 includes a stepped wall 26, a horizontal wall 27, and an inclined wall 28. The stepped wall 26 is formed so as to rise from the inner end of the upper wall 23 of the recess 21. The horizontal wall 27 is a horizontal wall extending further inward from the upper end of the stepped wall 26 and is disposed at a higher position than the upper wall 23 . The inclined wall 28 extends downward from the inner end of the horizontal wall 27 to the lower end 3 a of the receiving frame 3 .

[0033] The protrusion 22 is configured to be able to guide the extension 19 on the lower end side 6B of the hinge member 6 in the up and down direction. That is, a protrusion storage space 29 for guiding the extension 19 in the up and down direction is arranged below the protrusion 22. Furthermore, this protrusion storage space 29 is able to guide the stopper 20 in the up and down direction, and the horizontal wall 27 is a member that can be engaged from the bottom to the top as the stopper 20 moves upward.

[0034] The recess 21 and the protrusion 22 have side walls formed in the width direction B, one of which is a longitudinal vertical wall 12, and the other is an opposing wall 30 that faces the side of the recess storage space 25 and the protrusion storage space 29 and faces the longitudinal vertical wall 12.

[0035] Next, the configuration of the lid body 5 will be described. As shown in Fig. 1, the lid body 5 is formed in a rectangular shape in a plan view, and is attached to the opening 4 so as to be able to open and close freely. The lid body 5 includes a rectangular lid frame 31, a lid plate (grating body) 32 surrounded by the lid frame 31, ribs 33, and an installation portion 34 that supports the head portion 16 of the hinge member 6 via the support shaft member 18.

[0036] The four members 31A that form the lid frame 31 extend vertically and can abut against the lid mounting portion 14 from above when the lid main body 5 closes the opening 4 (fully closed state X). The lid upper end surface 5a of the lid main body 5 is disposed in approximately the same plane as the upper end surfaces 8a, 12a of the receiving frame 3. The lid plate 32 is formed thinner than the four members 31A, and the lid upper end surface 5a is also the upper end surface of the lid plate 32.

[0037] When the lid body 5 closes the opening 4 (fully closed state X), the lid plate 32 has multiple rain holes 5A that penetrate vertically. Moisture (e.g., rain or snow) that passes through these rain holes 5A flows into the gutter 1A. In addition, multiple downward-facing ribs 33 are formed on the back side of the lid body 5 so as to avoid the rain holes 5A.

[0038] The installation portion 34 will now be described. In the lid body 5 of this embodiment, there are two hinge members 6, and therefore there are two installation portions 34. Since the configuration of each installation portion 34 is the same, the configuration of one installation portion 34 can be used as the configuration of the other installation portion 34.

[0039] 6, the installation portion 34 includes a pair of support pieces that support the support shaft member 18 horizontally along the longitudinal direction L. The support pieces include an outer support wall 35 on the outer side in the longitudinal direction L, and an inner support wall 36 formed on the inner side relative to the outer support wall 35.

[0040] In the fully closed state X of the lid body 5, the outer support wall 35 and the inner support wall 36 extend downward from the lid upper end surface 5a of the lid body 5, and the lower end surfaces 35a, 36a of the outer support wall 35 and the inner support wall 36 are flat surfaces along the upper end surface 23a of the upper wall 23 of the recess 21. As shown in Fig. 7, the outer support wall 35 and the inner support wall 36 extend in the width direction B by an amount corresponding to the length of the protrusion 22 and the recess 21 (the hinge mounting portion 15).

[0041] One end faces 35b, 36b of the outer support wall 35 and the inner support wall 36 in the width direction B are aligned along the inner surface of the width vertical wall 8. The outer support wall 35 and the inner support wall 36 are arranged above the recess 21, and are housed within the receiving frame 3 when the lid body 5 is in the fully closed state X. Furthermore, through holes 35c, 36c that pass through the support shaft member 18 are formed in the plate surfaces of the outer support wall 35 and the inner support wall 36, and the installation portion 34 is provided with a head space 37 between the outer support wall 35 and the inner support wall 36, into which the head 16 of the hinge member 6 is inserted.

[0042] In the gutter cover 1 having the above configuration, as described above, the anchors 9 are passed through the fixing walls 7a formed on the transverse walls 7 of the receiving frame 3, and the anchors 9 are fixed to the upper surface of the gutter 1A, and the receiving frame 3 is fixed to the upper surface of the gutter 1A. After the receiving frame 3 is fixed to the gutter 1A, the road surface R is constructed. At this time, the road surface R is constructed so that it is flush with the upper end surfaces 8a, 12a of the receiving frame 3.

[0043] Furthermore, when the opening 4 of the receiving frame 3 is closed by the lid body 5, i.e., in the fully closed state X, the hinge member 6 is installed in the installation portion 34 of the lid body 5. At this time, the hinge member 6 is inserted into the head space 37 of the installation portion 34, and then the support shaft member 18 is inserted through the through-hole 35c of the outer support wall 35, the shaft hole 16a of the head 16 of the hinge member 6, and the through-hole 36c of the inner support wall 36.

[0044] Then, the extension portion 19 of the hinge member 6 is positioned below the recess 21, and the stopper 20, extension portion 19, and neck portion 17 of the hinge member 6 are passed through the neck hole 24 (see Figure 6), and the lid main body 5 is supported by the lid mounting portion 14.

[0045] This state is the fully closed state X in which the upper end portion 5a of the lid body 5 is flush with the upper end surface 8a of the width vertical wall 8 and the upper end surface 12a of the length vertical wall 12, the installation portion 34 consisting of the outer support wall 35 and the inner support wall 36 is positioned above the recess 21, and the hinge mounting portion 15 is attached to the lower end side (extension portion 19) of the hinge member 6.

[0046] In the fully closed state X, a horizontal surface 16c is formed on the head 16 of the hinge member 6, and this horizontal surface 16c is approximately coincident with the lid upper end surface 5a. Therefore, in the fully closed state X, the lid upper end surface 5a and the road surface R are flush with each other so as not to interfere with the vehicle. In other words, the hinge member 6 supported by the support shaft member 18 is formed so that the inclined surface 16b does not protrude from the road surface R even if the hinge member 6 is tilted by the weight of the extension portion 19. In addition, the head 16 is formed with an inclined surface 16b that is inclined downward toward one end side in the width direction B, and the inclined surface 16b is formed so as not to interfere with the lid main body 5 when the lid main body 5 opens from the fully closed state X to the fully open state Y as shown in FIG. 10 .

[0047] In the fully closed state X, for example, rainwater, debris, etc. enter the gutter 1A through the rain receiving hole 5A. When performing maintenance on the gutter cover 1, the cover body 5 is rotated around the support shaft member 18 to bring the cover upper end surface 5a of the cover body 5 into contact from above, resulting in the fully open state Y.

[0048] The following describes the case where the fully closed state X is changed to the fully open state Y, with reference to Figs. 7 to 10. Fig. 7 shows the fully closed state X of the lid main body 5. Fig. 10 shows the fully open state Y of the lid main body 5. To change from the fully closed state X of Fig. 7 to the fully open state Y of Fig. 10, the lid main body 5 passes through intermediate states P1 and P2, as shown in Figs. 8 and 9.

[0049] In the intermediate state P1 in Figure 8, the other end of the lid body 5 is disengaged from the receiving frame 3 by moving upward from the fully closed state X. At this time, when the hinge member 6 is pivotally supported by the support shaft member 18, the extension portion 19 side is formed to be heavy between the upper end side 6A and the lower end side 6B. Furthermore, the extension portion 19 formed on the hinge member 6 (lower end side 6B) moves upward in the protrusion storage space 29 following the upward movement of the support shaft member 18. Furthermore, since the head portion 16 of the hinge member 6 is pivotally supported by the support shaft member 18, it rotates in the head space 37.

[0050] 9, the lid body 5 is oriented perpendicular to the receiving frame 3. When the lid body 5 is lifted from the intermediate state P1 in FIG.

[0051] Furthermore, the extension 19 formed on the hinge member 6 (lower end side 6B) moves further upward in the protrusion storage space 29 following the upward movement of the support shaft member 18. Furthermore, the head 16 of the hinge member 6 is pivotally supported by the support shaft member 18, and therefore rotates in the head space 37.

[0052] In the fully open state Y of FIG. 10, the lid upper end surface 5a of the lid main body 5 abuts against the road surface R, and at this time, the neck portion 17 of the hinge member 6 moves further upward in the recessed storage space 25 from the state of FIG.

[0053] The hinge member 6 does not rotate any further when the lid upper end surface 5a of the lid main body 5 abuts against the road surface R. Even at this time, the head 16 of the hinge member 6 is pivotally supported by the support shaft member 18, so it rotates in the head space 37. Furthermore, in the fully closed state X of FIG. 7, the outer support wall 35 and the inner support wall 36 are disposed above the recess 21 and housed within the receiving frame 3. However, in the fully open state Y where the lid upper end surface 5a of the lid main body 5 abuts against the road surface R, the outer support wall 35 and the inner support wall 36 are released from the receiving frame 3 and are exposed. Furthermore, although the extension portion 19 moves further upward in the protrusion storage space 29, the stopper 20 engages with the horizontal wall 27 of the hinge mounting portion 15 from below to above, stopping the rotation of the hinge member 6 due to the pivotal support of the support shaft member 18.

[0054] As described above, the cover body 5 is changed from the fully closed state X to the fully open state Y, and maintenance of the gutter 1A is performed.

[0055] When maintenance of the gutter 1A is completed and the gutter is returned from the fully open state Y to the fully closed state X, the state changes from the fully open state Y in Fig. 10 to the intermediate state P2 in Fig. 9, to the intermediate state P1 in Fig. 8, and to the fully closed state X in Fig. 7. At this time, the hinge member 6 is formed in a substantially L-shape in side view, and one end faces 35b, 36b of the outer support wall 35 and the inner support wall 36 slide in opposite directions on the upper wall 23 of the recess 21, so the hinge member 6 moves downward via the support shaft member 18.

[0056] In this way, when the lid body 5 is rotated relative to the receiving frame 3 from the fully closed state X to the fully open state Y, or from the fully open state Y to the fully closed state X, the hinge member 6 moves in the vertical direction via the support shaft member 18. Therefore, the lid body 5 can be opened and closed simply by rotating it relative to the receiving frame 3, making it easy to open and close the lid body 5.

[0057] An extension portion 19 is bent inward of the receiving frame 3 relative to the upper end portion 6A at the lower end portion 6B of the hinge member 6 so as to fit into the protrusion storage space 29 below the hinge mounting portion 15, both in the fully closed state X and the fully open state Y of the lid body 5. In addition, a recessed storage space 25 is formed to accommodate the upper end side 6A (neck portion 17) of the hinge member 6 in both the fully closed state X and the fully open state Y of the lid body 5. This allows the hinge member 6 to easily move up and down.

[0058] Also, consider the case where the upper end of gutter 1A is inside receiving frame 3. However, when changing from fully closed state X to fully open state Y and from fully open state Y to fully closed state X, recessed portion receiving space 25 and protruding portion receiving space 29 are formed in hinge mounting portion 15, and hinge member 6 is contained within receiving frame 3 in the vertical direction, so hinge member 6 will not be damaged even if the upper end of gutter 1A is inside receiving frame 3. Specifically, for example, if the height of receiving frame 3 is changed from 80 mm to 60 mm, that is, even if the height of receiving frame 3 is lowered, hinge member 6 will not be damaged even if the upper end of gutter 1A, etc. is inside receiving frame 3, because hinge member 6 is contained within receiving frame 3 in the vertical direction.

[0059] Furthermore, the gutter cover 1 (grating cover) according to this embodiment has the hinge member 6 configured as described above, and after the hinge member 6 is inserted into the head space 37 of the installation section 34, the support shaft member 18 is passed through the through-hole 35c of the outer support wall 35, the shaft hole 16a of the head 16 of the hinge member 6, and the through-hole 36c of the inner support wall 36 to achieve the fully closed state X. Furthermore, to change from the fully closed state X to the fully open state Y, it is sufficient to open the cover plate (grating body) 32, and no special operation is required. Therefore, the configuration of the gutter cover 1 is simpler than conventional ones, and the manufacturing cost is also lower.

[0060] The present invention can be modified in various ways without departing from the spirit and scope of the invention. The specific configuration of each part is not limited to the above embodiment. In the above embodiment, the hinge member 6 is formed with a large weight on the extension portion 19 side. However, the upper end side 6A and the lower end side 6B may be arranged in a well-balanced manner so as not to tilt toward either the upper end side 6A or the lower end side 6B relative to the support shaft member 18. [Explanation of symbols]

[0061] 1...ditch cover, 1A...side gutter, 3...receiving frame, 4...opening, 5...lid body, 6...hinge member, 6A...upper end side, 6B...lower end side, 7...width horizontal wall, 8...width vertical wall, 11...longitudinal horizontal wall, 12...longitudinal vertical wall, 14...lid mounting portion, 15...hinge mounting portion, 16...head, 16a...shaft hole, 16b...inclined surface, 17...neck portion, 18...support shaft member, 19...extension portion, 20...stopper, 21...recess, 22...protrusion, 23...upper wall, 2 3a...upper end surface, 24...neck hole, 25...recessed storage space, 26...stepped wall, 27...horizontal wall, 28...inclined wall, 29...protruding portion storage space, 30...opposing wall, 31...lid frame, 32...lid plate, 34...installation portion, 35...outer support wall, 35a, 36a...lower end surface, 35b, 36b...one end surface, 35c, 36c...through hole, 36...inner support wall, 37...head space, B...width direction, L...longitudinal direction, R...road surface

Claims

[Claim 1] The container is provided with a receiving frame, a lid body capable of opening and closing an opening formed in the receiving frame and opening in the vertical direction, and a hinge member supporting the lid body so as to be openable and closable relative to the opening, The hinge member is a hinge structure for a lid for an underground structure that can be switched between a fully closed state in which the lid body closes the opening and a fully open state in which the opening is fully opened by rotating the lid body upward from the fully closed state via the hinge member, the receiving frame includes a lid mounting portion to which the lid body is attached, a hinge mounting portion disposed around the lid mounting portion to which the hinge member is attached, and a guide wall capable of guiding the hinge member in a vertical direction; The upper end side of the hinge member includes a head portion pivotally supported on an installation portion of the lid body via a substantially horizontal support shaft member above the hinge mounting portion, and a neck portion hanging down from the head portion and passing through a neck hole formed in the hinge mounting portion in the vertical direction, An extension portion is bent horizontally with respect to the neck portion on the upper end side of the hinge member so as to be accommodated in a storage space below the hinge attachment portion when the lid body is in a fully closed state and a fully open state, below the hinge attachment portion, A hinge structure for a lid for an underground structure, characterized in that the hinge mounting portion is provided with a limiting member capable of limiting the upward movement of the extension portion when the lid body is in a fully open state.

Images