Gutter cover

Abstract

To provide a ditch cover capable of preventing downstream outflow of a liquid oil leaked to a drain ditch over long hours without allowing overflow of drain from the drain ditch in an emergency.SOLUTION: A ditch cover 1 has a ditch cover body 2 covering a drain ditch G1 and a drain weir plate 3 with one end turnably pivoted to a rear face of the ditch cover body 2, around a turning axis 4. The drain weir plate 3, when turned downward from a first attitude P1 along the rear face of the ditch cover body 2, is configured to be a second attitude P2 closing a passage of the drain ditch G1 and damming. The drain weir plate 3 has a body part 30 having a hole-forming region R1 for forming multiple through-holes 33a, and a cover part 35 positioned on an upstream side in the ditch passage direction in the second attitude P2 of the body part 30. The cover part 35 covers the hole-forming region R1 so as to form a space S1 between the body part 30 and itself, and an outer peripheral part is connected to the body part 30 with no gap, excluding a region of the turning axis 4 side.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a gutter cover for covering a drainage gutter that drains rainwater and the like that accumulates on a road. [Background technology]

[0002] 2. Description of the Related Art Conventionally, drainage gutters formed at the side of roads for draining rainwater are provided with gutters covers that cover the upper opening areas thereof to prevent pedestrians, automobiles, etc. from falling in.

[0003] In the event of an unexpected emergency in a factory or the like, the liquid oil being handled may unintentionally leak outside and flow into the rainwater drains described above. If such leaked liquid oil flows through the drains together with rainwater to a drainage facility, there is a risk that the water quality of public waters such as the sea and rivers may deteriorate.

[0004] In order to avoid this, efforts are generally made to prevent liquid oil leaking from a factory or the like from flowing downstream of a drain. For example, a drain cover for covering a drain disclosed in Patent Document 1 includes a drain cover body having a metal frame extending in a lattice shape in a plan view, and a drain dam plate having a rectangular plate shape is disposed on the back side of the drain cover body. One end of the drain dam plate in the longitudinal direction is supported on the back side of the drain cover body by a rotating shaft extending in the width direction of the drain, and the drain dam plate is rotatable up and down around the rotating shaft. The drain cover body is provided with a locking mechanism having a locking member, and the locking mechanism is capable of fixing the drain dam plate in a position along the back side of the drain cover body. In the event of an emergency in a factory, etc., when a worker or the like operates the lock operating member to release the locking mechanism from the drainage dam plate, the drainage dam plate rotates downward around the pivot axis and assumes a position that blocks the passage of the drain. The drainage dam plate then blocks any liquid oil that has leaked outside from the factory, etc., and prevents the liquid oil from flowing further downstream. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2008-25102 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the case of Patent Document 1, when the drainage dam plate is placed in a position that blocks the passage of the drainage ditch, the drainage dam plate blocks the entire area of ​​the passage cross section of the drainage ditch, completely losing the drainage function of the drainage ditch. Therefore, although it is possible to prevent liquid oil leaking from a factory or the like from flowing further downstream immediately after operating the locking mechanism, if the response continues for a long time, the drainage water will gradually accumulate in the upstream area of ​​the drainage dam plate in the drainage ditch, and eventually the drainage water may overflow from the drainage ditch through the ditch cover body and pollute roads, etc.

[0007] The present invention has been made in consideration of the above points, and its object is to provide a gutter cover that can prevent liquid oil that has leaked into a drain from leaking downstream for a long period of time without causing wastewater to overflow from the drain in an emergency. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the present invention is characterized by its ingenuity in that when the drainage dam plate blocks the passage of the drain groove, only the drainage water excluding liquid oil can pass through the drainage dam plate.

[0009] Specifically, the target is a gutter cover equipped with a gutter cover body covering the upper open area of ​​a drainage gutter, and a drainage dam plate having one end supported on the back surface of the gutter cover body so as to be rotatable around a pivot axis extending in the gutter width direction of the drainage gutter, and configured so that when the other end is rotated downward from a first position along the back surface of the gutter cover body, it assumes a second position in which it blocks the passage of the drainage gutter and dams up the drainage.The following measures were taken for this target.

[0010] That is, in the first invention, the drainage dam plate is characterized in that it comprises a plate-shaped main body portion having a hole forming area in which at least one hole is formed connecting the upstream area and downstream area of ​​the drainage dam plate in the second position in the drainage gutter, and a cover portion located upstream of the main body portion in the second position in the groove passage direction, covering the hole forming area so that a predetermined space is formed between the main body portion and a cover portion whose outer periphery is connected to the main body portion without any gaps except for the area on the rotating shaft side.

[0011] The second invention is characterized in that, in the first invention, a sealing member is provided on the peripheral portion of the main body portion to fill the gap with the inner surface of the drainage groove when the drainage dam plate is in the second position.

[0012] A third invention is the second invention, wherein the sealing member is made of a sponge material.

[0013] The fourth invention, in any one of the first to third inventions, is provided with a plurality of bearing bars arranged side by side at a predetermined interval in the groove passage direction and forming a wide plate shape from top to bottom, and a locking mechanism having a locking operation member that can be switched between a locked position that fixes the drainage dam plate in a first position and an unlocked position that releases the fixation of the drainage dam plate in the first position and makes the drainage dam plate rotatable, and the locking operation member is arranged between two adjacent bearing bars and is configured to be switched between the locked position and the unlocked position of the drainage dam plate by sliding it in the groove width direction.

[0014] The fifth invention is characterized in that, in any one of the first to fourth inventions, a torsion spring is wound around the pivot shaft to urge the drainage dam plate in a direction away from the gutter cover main body. Effect of the Invention

[0015] In the first invention, when liquid oil with a specific gravity of 1 or less leaks outdoors from a factory or the like and flows into a drain, the liquid oil rises to the surface of the wastewater flowing through the drain, and when the drain dam plate is placed in the second position to block the wastewater, the blocked wastewater containing the liquid oil comes into contact with the cover and overcomes the pivot shaft side of the cover. At this time, since the specific gravity of the liquid oil is 1 or less, the liquid oil tends to remain on the surface of the wastewater, while the wastewater excluding the liquid oil enters between the main body and the cover and flows through holes formed in the main body to the downstream side of the drain. On the other hand, when liquid oil with a specific gravity of 1 or more leaks from a factory or the like to the outdoors and flows into a drain, the liquid oil is located on the bottom side of the drain together with the wastewater flowing through the drain, so that when the drain dam plate is in the second position to block the wastewater, the liquid oil contained in the blocked wastewater is blocked by the cover part and prevented from flowing downstream of the drain. The wastewater excluding the liquid oil comes into contact with the cover part and overcomes the pivot side of the cover part, enters between the main body part and the cover part, and passes through the hole formed in the main body part to flow downstream in the drain. In this way, regardless of the specific gravity of the liquid oil, the drain dam plate can be used to block only the liquid oil and allow the wastewater not containing the liquid oil to flow downstream of the drain, preventing the blocked wastewater from gradually accumulating on the upstream side of the drain dam plate and overflowing from the drain through the drain cover body and polluting roads, etc.

[0016] In the second aspect of the present invention, when the drainage dam plate is in the second position, the seal member eliminates the gap between the drainage dam plate and the inner peripheral surface of the drain groove. Therefore, in an emergency, liquid oil mixed in the drainage can be prevented from passing through the outside of the drainage dam plate and flowing downstream due to excessive force.

[0017] In the third aspect of the present invention, when the drainage damming plate is in the second position to block the drainage, the sponge material absorbs the drainage and expands. Therefore, the gap between the drainage damming plate and the inner peripheral surface of the drainage groove is completely blocked, so that it is possible to reliably prevent liquid oil mixed in the drainage from flowing downstream.

[0018] In the fourth aspect of the present invention, when the lock operation member of the lock mechanism is set to the unlocked position, the first position of the drainage dam plate is released and the drainage dam plate rotates downward to the second position, so that in an emergency, the drainage dam plate can be changed to the dammed state with a simple operation. Also, since the operation direction of the lock operation member is the groove width direction where there is no interference between adjacent bearing bars, it is possible to increase the amount of movement when the lock operation member is operated. Therefore, it is possible to set the width dimension of the engagement portion of the lock operation member with the drainage dam plate in the locked position wide, and a stable locked state can be realized in the locked position so that the locked state is not released even if force is suddenly applied to the lock mechanism of the gutter cover.

[0019] In the fifth invention, the pivot shaft is located inside the torsion spring, so the space occupied by the torsion spring and the pivot shaft is approximately the same. This makes it possible to avoid the torsion spring and the pivot shaft occupying separate spaces, which would result in an increase in size of the structure, and allows for an overall compact structure. In addition, the biasing force of the torsion spring applies a force to the drainage damming plate in a direction away from the gutter cover body. Therefore, when the drainage damming plate is in the second position, the drainage damming plate is pressed strongly against the bottom of the drain, and the drainage damming state of the drainage damming plate in the second position can be stabilized. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a plan view showing the structure of a part of the rear surface side of the gutter cover according to the first embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] 2 and shows the state in which a drainage dam plate is blocking drainage water containing liquid oil with a specific gravity of 1 or less. [Figure 4] 2 and 3. FIG. 4 is a view equivalent to FIG. 2 showing a state in which a drainage dam plate is blocking drainage water containing liquid oil with a specific gravity of 1 or more. [Diagram 5] FIG. 4 is a view taken along the arrow IV in FIG. [Figure 6] 2 is a cross-sectional view taken along line VV in FIG. 1. [Figure 7] FIG. 2 is a cross-sectional view taken along line VI-VI in FIG. [Figure 8] FIG. 7 is a view corresponding to FIG. 5 of the second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, in which: It should be noted that the following description of the preferred embodiments is merely exemplary in nature.

[0022] First Embodiment of the Invention 1 to 4 show a gutter cover 1 according to a first embodiment of the present invention. The gutter cover 1 is used by being hung across a drainage ditch G1 with a U-shaped cross section that drains rainwater and the like that accumulates on a road, and includes a gutter cover body 2 that covers the upper open area of ​​the drainage ditch G1.

[0023] The gutter cover body 2 comprises a pair of band-like end plates 2a extending parallel to each other in the gutter passage direction at a predetermined interval in the gutter width direction, a plurality of bearing bars 2b arranged side by side at a predetermined interval in the gutter passage direction and having an approximately I-shaped cross section extending in the gutter width direction to connect both end plates 2a, and a plurality of twist bars 2c manufactured by twisting square steel, arranged side by side at a predetermined interval in the gutter width direction, extending in the gutter passage direction and connecting the upper portions of each bearing bar 2b, with each bearing bar 2b and each twist bar 2c arranged to extend in a lattice pattern when viewed in a plane.

[0024] As shown in Figure 6, support brackets 2d having an L-shaped cross section are fixed to the lower part of the gutter cover body 2 downstream in the gutter passage direction at a predetermined interval in the gutter width direction, and a rotating shaft 4 extending in the gutter width direction is attached to both support brackets 2d so as to bridge both support brackets 2d.

[0025] A drainage dam plate 3 having a substantially rectangular plate shape is disposed substantially at the lower center of the gutter cover body 2 so as to run along the gutter cover body 2 .

[0026] As shown in Figure 5, the drainage dam plate 3 has a main body portion 30 which has a generally convex shape when viewed in the thickness direction of the plate, and the main body portion 30 has an attachment portion 31 located at one end in the longitudinal direction, and a dam portion 32 extending from the one end region in the longitudinal direction to the other end.

[0027] The dam portion 32 has a width dimension corresponding to the width dimension of the drainage groove G1, and comprises a plate-shaped frame 33 which is rectangular when viewed in the thickness direction, and a sealing member 34 made of sponge material attached to the peripheral portion of the plate-shaped frame 33.

[0028] The sealing member 34 has a rectangular cross-section and, when viewed in the thickness direction of the plate-shaped frame 33, has a U-shaped extension that opens to one longitudinal end side of the plate-shaped frame 33, and its thickness is set to be greater than the plate thickness of the plate-shaped frame 33.

[0029] In a region extending from the center in the longitudinal direction of the plate-shaped frame 33 to a position near the other end, a plurality of circular through holes 33a penetrating in the plate thickness direction are formed in a grid pattern.

[0030] That is, the plate-shaped frame 33 has a hole forming region R1 where a plurality of through holes 33a are gathered.

[0031] A hook portion 36 having an L-shaped cross section is attached to a position near one end of the longitudinal center of the plate-shaped frame 33, protruding toward the gutter cover main body 2 and protruding from its protruding end toward the other longitudinal end of the plate-shaped frame 33.

[0032] A first fixing plate portion 37 having a first through hole 37a penetrating the plate frame 33 in the width direction is provided at the center near the other longitudinal end of the plate frame 33 so as to protrude toward the groove cover body 2 side.

[0033] Furthermore, at the center near one longitudinal end of the plate-shaped frame 33, a second fixing plate portion 38 having a second through hole 38a penetrating in the width direction of the plate-shaped frame 33 is protruded on the opposite side of the gutter cover main body 2, as shown in Figures 2 to 4.

[0034] A panel-shaped cover portion 35 is provided on the gutter cover main body 2 side of the plate-shaped frame 33 to cover the hole formation area R1 so that a predetermined space S1 is formed between the plate-shaped frame 33 and the cover portion 35, and its outer periphery is connected to the plate-shaped frame 33 without any gaps except for the area on the mounting portion 31 side.

[0035] That is, the space S1 formed between the plate-shaped frame 33 and the cover portion 35 is open to the attachment portion 31 side.

[0036] A thin and long round bar member 31a extending in the groove width direction is fixed to the mounting portion 31 at a position on the groove cover main body 2 side close to the plate-like frame 33.

[0037] In addition, as shown in Figure 6, a pair of L-shaped frames 39 are fixed at a distance from each other to each end in the groove width direction on the gutter cover main body 2 side of the mounting portion 31, and each L-shaped frame 39 is supported on a rotating shaft 4 so that the drainage dam plate 3 rotates around the rotating shaft 4.

[0038] 2 to 4, one longitudinal end of the drainage dam plate 3 is journalled on the back surface of the gutter cover body 2 so as to be rotatable about a pivot shaft 4 extending in the gutter width direction of the drainage gutter G1, and is adapted to rotate between a first position P1 along the back surface of the gutter cover body 2 and a second position P2 extending obliquely downward from the pivot shaft 4 towards the upstream side in the gutter passage direction of the drainage gutter G1. The cover part 35 is positioned upstream in the gutter passage direction of the body part 30 in the second position P2.

[0039] When the drainage dam plate 3 is in the second position P2, it blocks the passage of the drainage groove G1 and blocks the drainage W1, and the sealing member 34 is configured to fill the gap between the drainage dam plate 3 and the inner surface of the drainage groove G1 when the drainage dam plate 3 is in the second position P2.

[0040] Further, when the drainage dam plate 3 is in the second position P2, each through hole 33a is configured to communicate the upstream region and downstream region of the drainage dam plate 3 in the second position P2 in the drain groove G1.

[0041] As shown in FIG. 6, five torsion springs 41 are wound around the rotating shaft 4, and the torsion springs 41 are disposed along the rotating shaft 4 at predetermined intervals.

[0042] One end of each torsion spring 41 abuts against the round bar member 31a, while the other end abuts against one of the bearing bars 2b, and each torsion spring 41 urges the drainage dam plate 3 in a direction away from the gutter cover main body 2.

[0043] As shown in Figures 1 to 4, a locking mechanism 5 is provided in the longitudinal center of the gutter cover main body 2, and as shown in Figure 7, the locking mechanism 5 has a slide rail 51 extending in the groove width direction and a lock operating member 52 slidably attached to the slide rail 51.

[0044] The lock operation member 52 is located between two adjacent bearing bars 2b, and its upper half is generally U-shaped, wide in the groove width direction when viewed in the groove passage direction, and open upward.

[0045] An engagement hook 53 is attached to the lower surface of the lock operation member 52, protruding downward and protruding from its protruding end toward the downstream side in the groove passage direction and having an L-shaped cross section.

[0046] The engagement hook 53 is in a position corresponding to the hook portion 36 when the drainage dam plate 3 is in the first position P1, and as shown in Figure 7, when the lock operation member 52 is slid to one side in the groove width direction, the engagement hook 53 slips under the hook portion 36 and engages with the hook portion 36 to hold the drainage dam plate 3 in the first position P1, whereas when the lock operation member 52 is slid to the other side in the groove width direction, it becomes in a position not corresponding to the hook portion 36 and disengages from the hook portion 36 (see dashed line in Figure 7).

[0047] In other words, the lock operating member 52 is configured to be switched between a locked position which fixes the drainage dam plate 3 in the first position P1 and an unlocked position which releases the fixation of the drainage dam plate 3 in the first position P1 and makes the drainage dam plate 3 rotatable by sliding it respectively to one side or the other in the groove width direction, and when the lock operating member 52 is in the unlocked position, the biasing force of the torsion spring 41 causes the drainage dam plate 3 to rotate downward to the second position P2.

[0048] As shown in Figs. 2 to 4, at the other end side of the locking mechanism 5 in the longitudinal center portion of the gutter cover body 2, a storage mechanism 6 is disposed at a position adjacent to the locking mechanism 5.

[0049] The storage mechanism 6 is composed of a first operating handle 6a which is approximately T-shaped when viewed in the groove passage direction, a first chain 6b which connects the first operating handle 6a to the first fixed plate portion 37 of the drainage dam plate 3, and a first support frame 6c which is provided between two adjacent bearing bars 2b and supports the first operating handle 6a from below.When the first operating handle 6a is lifted when the drainage dam plate 3 is in the second position P2, the drainage dam plate 3 can be rotated against the biasing force of each torsion spring 41 via the first chain 6b and lifted until it assumes the first position P1.

[0050] Further, a rotation assist mechanism 7 is disposed adjacent to the rotation shaft 4 at the center of the other end side in the longitudinal direction of the groove cover body 2 relative to the rotation shaft 4 .

[0051] The rotation assistance mechanism 7 is composed of a second operating handle 7a which is approximately T-shaped when viewed in the groove passage direction, a second chain 7b which connects the second operating handle 7a and the second fixed plate portion 38 of the drainage dam plate 3, a second support frame 7c which is provided between two adjacent bearing bars 2b and supports the second operating handle 7a from below, and a chain guide portion 7d which surrounds the connection portion of the second chain 7b with the second operating handle 7a.When the drainage dam plate 3 stops rotating midway from the first position P1 to the second position P2, by lifting the second operating handle 7a, the drainage dam plate 3 can be rotated downward via the second chain 7b and pulled until it reaches the second position P2.

[0052] Next, an explanation will be given of the operation of the gutter cover 1 according to the first embodiment of the present invention when an unexpected emergency occurs.

[0053] For example, when liquid oil X1 leaks outside from a factory or the like, an operator slides the lock operation member 52 of the gutter cover 1 to the other side in the gutter width direction. Then, as shown in Figures 2 to 4, the lock operation member 52 goes to the unlocked position, the engagement hook 53 disengages from the catch portion 36, and the drainage dam plate 3 rotates downward by gravity and the biasing force of the torsion spring 41 to the second position P2, blocking the passage of the drainage gutter G1.

[0054] During this unlocking operation by the worker, if the drainage dam plate 3 stops midway before rotating to the second position P2 due to reasons such as rusting of the torsion spring 41, the second operating handle 7a of the rotation assist mechanism 7 is pulled upward. Then, the drainage dam plate 3 is pulled via the second chain 7b and rotates downward until it assumes the second position P2.

[0055] For example, when liquid oil X1 with a specific gravity of 1 or less leaks outside from a factory or the like and flows into a drain G1, the liquid oil X1 floats up on the liquid surface side of the wastewater W1 flowing through the drain G1 as shown in Fig. 3, and when the drain dam plate 3 is set in the second position P2 to block the wastewater W1, the blocked wastewater W1 including the liquid oil X1 comes into contact with the cover part 35 and overcomes the rotating shaft 4 side of the cover part 35. At this time, since the specific gravity of the liquid oil X1 is 1 or less, the liquid oil X1 tends to remain on the liquid surface side of the wastewater W1, while the wastewater W1 excluding the liquid oil X1 enters the space S1 between the main body part 30 and the cover part 35 and flows downstream in the drain G1 through each through hole 33a formed in the main body part 30.

[0056] On the other hand, when liquid oil X1 with a specific gravity of 1 or more leaks outside from a factory or the like and flows into the drain G1, the liquid oil X1 is located on the bottom side of the drain G1 together with the wastewater W1 flowing through the drain G1, as shown in Fig. 4, so that when the drain dam plate 3 is set in the second position P2 to block the wastewater W1, the liquid oil X1 contained in the blocked wastewater W1 is blocked by the cover part 35 and prevented from flowing downstream of the drain G1. The wastewater W1 excluding the liquid oil X1 comes into contact with the cover part 35, passes over the rotating shaft 4 side of the cover part 35, enters between the main body part 30 and the cover part 35, and passes through each through hole 33a formed in the main body part 30 to flow downstream in the drain G1.

[0057] In this way, regardless of the specific gravity of the liquid oil X1, the drainage dam plate 3 can be used to block only the liquid oil X1, and the wastewater W1 not containing the liquid oil X1 can be allowed to flow downstream of the drainage ditch G1, thereby preventing the blocked wastewater W1 from gradually accumulating upstream of the drainage dam plate 3 and overflowing from the drainage ditch G1 through the ditch cover body 2, thereby polluting roads, etc.

[0058] When the operator confirms that the liquid oil X1 is no longer mixed with the wastewater W1 flowing into the drain groove G1, he pulls the first operating handle 6a of the storage mechanism 6 upward. Then, the operator rotates the drainage dam plate 3 against the biasing force of each torsion spring 41 via the first chain 6b and lifts it up until it reaches the first position P1, and in that state, slides the lock operation member 52 to one side in the groove width direction. Then, the lock operation member 52 reaches the lock position, and the engagement hook 53 engages with the catch portion 36, and the drainage dam plate 3 is fixed again in the first position P1.

[0059] In this way, according to the first embodiment of the present invention, in an emergency, only the liquid oil X1 mixed into the wastewater W1 can be blocked by the drainage dam plate 3, and the wastewater W1 not containing the liquid oil X1 can be discharged downstream of the drainage ditch G1.

[0060] Furthermore, when the drainage dam plate 3 is in the second position P2, the seal member 34 eliminates the gap between the drainage dam plate 3 and the inner peripheral surface of the drain groove G1. Therefore, in an emergency, the liquid oil X1 mixed with the wastewater W1 can be prevented from passing through the outside of the drainage dam plate 3 and flowing downstream.

[0061] In addition, when the drainage damming plate 3 is in the second position P2 to block the drainage W1, the seal member 34 made of a sponge material absorbs the drainage W1 and expands. Therefore, the gap between the drainage damming plate 3 and the inner peripheral surface of the drainage groove G1 is completely blocked, so that the liquid oil X1 mixed with the drainage W1 can be reliably prevented from flowing downstream.

[0062] In addition, when the lock operation member 52 in the lock mechanism 5 is set to the unlocked position, the first position P1 of the drainage dam plate 3 is released and the drainage dam plate 3 rotates downward to the second position P2, so that in an emergency, the drainage dam plate 3 can be changed to the dammed state with a simple operation. In addition, since the operation direction of the lock operation member 52 is the groove width direction in which there is no interference between adjacent bearing bars 2b, it is possible to increase the amount of movement of the lock operation member 52 when operated. Therefore, it is possible to set the width dimension of the engagement portion of the lock operation member 52 with the drainage dam plate 3 in the locked position wide, and a stable locked state can be realized in the locked position so that the locked state is not released even if force is suddenly applied to the lock mechanism 5 of the gutter cover 1.

[0063] In addition, since the rotating shaft 4 is located inside the torsion spring 41, the spaces occupied by the torsion spring 41 and the rotating shaft 4 are approximately the same. Therefore, it is possible to prevent the torsion spring 41 and the rotating shaft 4 from occupying separate spaces, which would result in an increase in size of the structure, and it is possible to achieve a compact overall structure.

[0064] In addition, the biasing force of the torsion spring 41 applies a force to the drainage dam plate 3 in a direction away from the gutter cover body 2. Therefore, when the drainage dam plate 3 is in the second position P2, the drainage dam plate 3 is pressed strongly against the bottom of the drain gutter G1, and the damming state of the drainage W1 by the drainage dam plate 3 in the second position P2 can be stabilized.

[0065] Second Embodiment of the Invention 8 shows a drainage dam plate 3 according to a second embodiment of the present invention. In this second embodiment, the only difference from the first embodiment is the shape of the through hole 33a, and the rest is the same as the first embodiment. Therefore, only the differences from the first embodiment will be described below.

[0066] The through hole 33a in the second embodiment is formed in a region extending from the longitudinal center of the plate-shaped frame 33 to a position near the other end, and has a rectangular shape occupying most of the region of approximately the other longitudinal half of the plate-shaped frame 33. In other words, approximately the other longitudinal half of the plate-shaped frame 33 has a rectangular frame shape.

[0067] As described above, since the through hole 33a in embodiment 2 of the present invention has an opening area larger than the total area occupied by each of the through holes 33a in embodiment 1, it becomes easier for wastewater W1 excluding liquid oil X1 to pass through, and it is possible to prevent objects from clogging the through hole 33a during use.

[0068] In the first and second embodiments of the present invention, each through hole 33a has a circular or rectangular shape, but may have other shapes, such as a square, elliptical, triangular, polygonal, or star shape.

[0069] Further, in the first and second embodiments of the present invention, the seal member 34 is made of a sponge material, but this is not limiting and it may be made of, for example, a rubber material or a resin material.

[0070] In addition, in embodiments 1 and 2 of the present invention, five torsion springs 41 are wound around the rotating shaft 4, but it may be configured so that one to four torsion springs 41 are wound, or it may be configured so that six or more torsion springs 41 are wound.

[0071] In addition, in embodiments 1 and 2 of the present invention, a torsion spring 41 is used as a member for biasing the drainage dam plate 3 downward, but this is not limited to this, and other types of spring members or other types of biasing members may be used as long as they are capable of biasing the drainage dam plate 3 downward. [Industrial Applicability]

[0072] The present invention is suitable for a gutter cover for covering a drainage gutter that drains rainwater and the like that accumulates on a road. [Explanation of symbols]

[0073] 1 groove lid 2 Gutter cover body 2b Bearing bar 3 Drainage dam plate 30 Main body 33a Through hole 34 Sealing material 35 Cover part 4 Rotating Axis 41 Torsion Spring 5 Locking mechanism 52 Lock operation member G1 Drain P1 1st posture P2 2nd posture R1 pore formation area S1 space

Claims

1. A drainage dam plate having a drainage cover body covering an upper open area of ​​a drainage ditch, one end of which is supported on the back surface of the drainage cover body so as to be rotatable about a rotation axis extending in the drainage ditch width direction, and which is configured to assume a second position in which it blocks the passage of the drainage ditch and blocks drainage when rotated so that the other end moves downward from a first position along the back surface of the drainage cover body, The drainage dam plate is characterized in that it comprises a plate-shaped main body portion having a hole forming area in which at least one hole is formed connecting the upstream area and downstream area of ​​the drainage dam plate in the second position in the drainage gutter, and a cover portion located upstream in the groove passage direction of the main body portion in the second position, covering the hole forming area so that a predetermined space is formed between the main body portion and a cover portion whose outer periphery is connected to the main body portion without any gaps except for the area on the pivot shaft side.

2. 2. The groove cover according to claim 1, A gutter cover characterized in that a sealing member is provided on the peripheral portion of the main body portion to fill a gap between the drain dam plate and the inner surface of the drain gutter when the drain dam plate is in the second position.

3. 3. The groove cover according to claim 2, The groove cover is characterized in that the sealing member is made of a sponge material.

4. A gutter cover according to any one of claims 1 to 3, The gutter cover body is provided with a plurality of bearing bars arranged side by side at predetermined intervals in the gutter passage direction and each of which has a wide plate shape from top to bottom, and a lock mechanism having a lock operation member that can be switched between a lock position that fixes the drainage dam plate in a first position and an unlock position that releases the fixation of the drainage dam plate in the first position and allows the drainage dam plate to rotate, The gutter cover is characterized in that the lock operating member is arranged between two adjacent bearing bars and is configured to switch the drainage dam plate between a locked position and an unlocked position by sliding it in the gutter width direction.

5. A groove cover according to any one of claims 1 to 4, A gutter cover characterized in that a torsion spring is wound around the pivot shaft to bias the drainage dam plate in a direction away from the gutter cover body.

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