JP7145102B2 - Floating gates and inspection methods for floating gates - Google Patents

Description

The present invention relates to a floating gate and a floating gate inspection method.

Floating gates are conventionally known (see Patent Document 1, for example).

The aforementioned Patent Document 1 discloses a floating flap gate (floating gate) provided with a door body that moves by buoyancy to block water when water flows in.

Patent No. 5580785

Although it is not specified in the above Patent Document 1, in the conventional floating flap gate, when inspecting whether or not the door moves normally when buoyancy acts on the door, the lever is moved through a load meter such as a load cell. A lifting device such as a block (manual lifting device) (registered trademark) or a crane is used to lift the door, and the force required to move the door is measured. For this reason, it is necessary to prepare a load cell and a lifting device for the inspection, so the equipment for the inspection becomes large-scaled and it is difficult to carry out the inspection easily. Therefore, it is desired to easily inspect floating flap gates (floating gates) with a simple configuration.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to provide a floating gate and an inspection method for floating gates that can be easily inspected with a simple configuration. to provide a method.

In order to achieve the above object, the floating gate according to the first aspect of the present invention comprises a gate body that moves by buoyancy to dam water when water flows in; a biasing member for applying a force corresponding to the amount of deformation upward; the gate body is provided at a position facing the biasing member, and an inspection pressing member for pressing the biasing member downward is inserted therein. and includes an engaging portion that engages with the inspection pressing member in a state where the inspection pressing member presses the urging member, and when inspecting the movement of the gate body, the inspection pressing member is attached to the engaging portion. While engaging the pressing member, the pressing member for inspection presses the biasing member downward, and the biasing member biases the gate body upward. In addition, to engage means to mutually engage and couple. For example, engaging includes intermeshing and coupling. Engagement also includes fitting and coupling one to the other.

In the floating gate according to the first aspect of the present invention, with the configuration as described above, the gate body is buoyant by using the inspection pressing member that presses downward the biasing member arranged below the gate body. Therefore, it is not necessary to prepare a load cell such as a load cell, a lifting device such as a lever block, or a crane for lifting the gate body. As a result, the floating gate can be easily inspected with a simple configuration.

In the floating gate according to the first aspect, the biasing member preferably includes a compression coil spring, and a lid portion disposed above the compression coil spring and abutted by the inspection pressing member. With this configuration, it is possible to generate an urging force using a compression coil spring with a simple configuration, so that it is possible to suppress the complication of the device configuration. In addition, the biasing force of the compression coil spring can be reliably transmitted to the inspection pressing member through the lid portion.

In this case, preferably, the lid has a recess into which the tip of the pressing member for inspection enters and abuts. With this configuration, it is possible to prevent the position of the pressing member for inspection from deviating in contact with the lid portion, so that the urging force can be more reliably transmitted from the compression coil spring to the pressing member for inspection. For example, when the gate body rotates and moves, even if the angle at which the tip of the inspection pressing member abuts against the lid changes as the gate body rotates, the concave portion prevents the inspection pressing member from moving. Since the displacement of the tip is suppressed, the urging force can be reliably transmitted from the compression coil spring to the inspection pressing member.

The configuration in which the biasing member includes a compression coil spring preferably further includes a casing arranged to surround the compression coil spring. With this configuration, the casing can restrict deformation of the compression coil spring only in the expansion and contraction directions, so bending of the compression coil spring can be suppressed. As a result, the biasing force of the compression coil spring can be efficiently transmitted to the gate body.

In the floating gate according to the first aspect, preferably, a plurality of urging members are provided in the horizontal direction perpendicular to the direction in which the gate body dams up water. With this configuration, the biasing force of a plurality of biasing members can be applied, so that even a gate body having a large mass can be easily moved and inspected.

In order to achieve the above object, a floating gate inspection method according to a second aspect of the present invention is a floating gate inspection method comprising a gate body that moves by buoyancy to dam water when water flows in. Then, the inspection pressing member is inserted into and engaged with the engagement portion provided in the gate body, and the inspection pressing member presses downward the biasing member arranged below the gate body, thereby pressing the pressing member downward. By exerting an upward force corresponding to the amount of downward deformation of the biasing member, the gate body is biased upward, and the movement of the gate body is inspected.

In the method for inspecting a floating gate according to the second aspect of the present invention, the inspection pressing member configured to press downward the biasing member arranged below the gate body is used to inspect the gate. Since it is possible to inspect whether or not the main body moves due to buoyancy, there is no need to prepare a load meter such as a load cell, a lever block, or a lifting device such as a crane for lifting the gate main body. As a result, it is possible to provide an inspection method for a floating gate that can easily inspect the floating gate with a simple configuration.

According to the present invention, as described above, a floating gate can be easily inspected with a simple configuration.

1 is a schematic perspective view showing a floating gate according to one embodiment of the present invention; FIG. 1 is a side view of a floating gate according to one embodiment of the present invention; FIG. 1 is a first diagram for explaining inspection of a floating gate according to one embodiment of the present invention; FIG. FIG. 2 is a second diagram for explaining inspection of a floating gate according to one embodiment of the present invention; FIG. 4 is a diagram showing a first example of a biasing member of a floating gate according to one embodiment of the present invention; FIG. 5 is a diagram showing a second example of the biasing member of the floating gate according to one embodiment of the present invention; FIG. 4 is a view showing an inspection pressing member used for inspection of a floating gate according to one embodiment of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

A floating gate 100 according to an embodiment of the present invention will now be described with reference to FIGS. 1-7.

(Configuration of floating gate)
The floating gate 100 according to one embodiment of the present invention prevents water from flowing into the downstream side (Y2 direction side) of the floating gate 100 in the event of flooding due to torrential rain or the like, or flooding due to a tsunami or high waves. configured to suppress. A floating gate 100 is provided at the opening of the wall 2 . That is, normally, the floating gate 100 reaches the bottom and opens the opening. This allows passage between the walls 2 . In addition, when flooded, the floating gate 100 is configured to stand up and close the opening between the walls 2 to suppress the intrusion of water.

The floating gate 100 includes a gate body 1 and a biasing member 3, as shown in FIG.

The gate body 1 is configured to move by buoyancy and dam water when water flows in. Specifically, the gate body 1 is configured to rotate about a predetermined rotation axis 11 to stand up and block water when water flows in. As shown in FIG. The gate body 1 dams water coming from the Y1 direction so that it does not flow in the Y2 direction. The rotation axis 11 is arranged so as to extend in a direction (X direction) perpendicular to the water damming direction. In addition, the rotation axis 11 is arranged on the downstream side (Y2 direction side) of the gate body 1 in the water damming direction.

A watertight member 12 is attached to the gate body 1 to ensure watertightness with respect to the wall 2 . The watertight member 12 is made of rubber. The watertight members 12 are provided at both ends of the gate body 1 in the width direction (X direction). In other words, the watertight members 12 are arranged so as to extend in the Y direction at the X1-direction end and the X2-direction end of the gate body 1 . The watertight member 12 is arranged so as to contact the wall 2 . As a result, the gate body 1 is rotatable, and the inflow of water from between the gate body 1 and the wall 2 can be suppressed.

Further, the gate body 1 includes a buoyant body 13 and an upper surface portion 14, as shown in FIG. The buoyant body 13 has a predetermined volume and generates buoyancy when flooded. The upper surface portion 14 is configured to be the upper surface of the gate body 1 when the gate body 1 is on the bottom. The upper surface portion 14 is formed in a plate shape. The upper surface portion 14 has a predetermined thickness (about 5 mm or more and 10 mm or less). Further, the upper surface portion 14 is made of steel. The upper surface portion 14 is connected to the buoyant body 13 . In addition, the upper surface portion 14 is arranged above the buoyant body 13 (Z1 direction side). An engaging portion 141 with which the inspection pressing member 4 engages is provided in the vicinity of the end portion on the Y1 direction side of the upper surface portion 14 .

The engaging portion 141 is provided at a position facing the biasing member 3 of the upper surface portion 14 . The engaging portion 141 is configured by a through hole having an internal thread. Further, as shown in FIG. 2, the engaging portion 141 is configured to be engaged with a bolt 142 . In other words, when the floating gate 100 is not inspected, the through hole of the engaging portion 141 needs to be closed. Therefore, except when the floating gate 100 is inspected, the bolt 142 is inserted into and engaged with the engaging portion 141 . The bolt 142 has a length approximately equal to the thickness of the upper surface portion 14 on which the engaging portion 141 is provided.

The biasing member 3 is arranged below the gate body 1 . Also, the biasing member 3 is configured to apply a force upward in accordance with the amount of downward deformation. The biasing member 3 includes a compression coil spring 31 and a lid portion 32, as shown in FIG. The compression coil spring 31 is arranged inside a tubular casing 33 .

As shown in FIG. 1, a plurality of urging members 3 are provided in the horizontal direction (X direction) perpendicular to the direction in which the gate body 1 dams up water. For example, three urging members 3 are provided at predetermined intervals in the left-right direction (X direction). Also, the plurality of biasing members 3 are arranged at regular intervals.

Further, the biasing member 3 is provided at a position facing the tip (Y1 direction end) of the gate body 1 in the bottomed state. In other words, the urging member 3 is arranged at the distal end position farthest from the rotation axis 11 . This makes it possible to increase the moment acting on the gate body 1 by the biasing force of the biasing member 3 .

The compression coil spring 31 is configured to generate an upward biasing force by being compressed downward. As shown in FIG. 2, the compression coil spring 31 is arranged in the casing 33 at its natural length when not pressed from above.

The lid portion 32 is arranged above the compression coil spring 31 . Further, the lid portion 32 is configured to be brought into contact with the inspection pressing member 4 . Further, the lid portion 32 is arranged inside the casing 33 . The lid portion 32 is formed in a disc shape. Further, as shown in FIG. 5, the lid portion 32 is provided with a circular concave portion 321 into which the tip of the pressing member 4 for inspection enters and abuts. That is, the inner diameter of the circular concave portion 321 is larger than the outer diameter of the tip of the pressing member 4 for inspection. The circular recess 321 shown in FIG. 5 has a columnar space. Moreover, as shown in FIG. 6, the lid portion 32 may be provided with a concave portion 322 into which the tip of the pressing member 4 for inspection enters and abuts. The concave portion 322 shown in FIG. 6 has a curved vertical cross-sectional shape.

The casing 33 is arranged to surround the compression coil spring 31 . The casing 33 has a cylindrical shape. Casing 33 is fixed to the bottom of floating gate 100 . The inner diameter of the casing 33 is larger than the outer diameter of the compression coil spring 31 . Further, the casing 33 is arranged so as to extend in the vertical direction (Z direction). In other words, the casing 33 guides the deformation of the compression coil spring 31 only in the expansion and contraction direction (vertical direction (Z direction)).

Here, in this embodiment, the floating gate 100 is provided with an inspection pressing member 4 used for inspecting movement of the gate body 1, as shown in FIG. The inspection pressing member 4 is used to press the biasing member 3 downward. Further, the inspection pressing member 4 is configured to engage with the engaging portion 141 of the gate body 1 . That is, the engaging portion 141 is configured to engage with the inspection pressing member 4 in a state in which the inspection pressing member 4 is inserted and the inspection pressing member 4 presses the biasing member 3 . ing.

In addition, in this embodiment, the floating gate 100 engages the inspection pressing member 4 with the engaging portion 141 of the gate body 1 when inspecting the movement of the gate body 1, and the inspection pressing member 4 The biasing member 3 is pressed downward to bias the gate body 1 upward. That is, an upward biasing force corresponding to the amount of deformation of the compression coil spring 31 (biasing member 3 ) that is compressed downward is transmitted to the gate body 1 via the engaging portion 141 .

The inspection pressing member 4 is composed of a bolt. That is, the inspection pressing member 4 is inserted while being screwed into the engaging portion 141 having the female thread. Further, the inspection pressing member 4 is provided with a reference line 41 as shown in FIG. The reference line 41 is used to determine the inspection result when inspecting the movement of the gate body 1 . For example, when the inspection pressing member 4 is inserted into the engaging portion 141 of the gate body 1 up to the reference line 41, the floating state of the gate body 1 (whether or not the gate body 1 is lifted, the amount of floating, etc.) is determined, and the inspection result is obtained. to decide. Further, the inspection pressing member 4 is inserted into the engaging portion 141, and when the gate body 1 is lifted up, the inspection result is determined by whether or not the inspection pressing member 4 is inserted up to the reference line 41.例文帳に追加

(Inspection method for floating gates)
A method for inspecting the floating gate 100 will be described with reference to FIGS. 3 and 4. FIG.

The inspection of the floating gate 100 is performed to confirm whether or not it can float due to the buoyancy generated when the gate body 1 is submerged. That is, when a foreign object is caught around the gate body 1, when the frictional force between the watertight member 12 and the wall 2 increases, or when an object adheres to the gate body 1 and the gate body 1 becomes heavy. In some cases, the buoyancy of the gate body 1 does not allow the gate body 1 to float. The inspection of the floating gate 100 is performed in order to recognize in advance such a state in which the gate body 1 does not float. When it is determined that the gate body 1 cannot float due to buoyancy, work is performed to remove the cause.

For inspection of the floating gate 100, as shown in FIG. Specifically, the bolt 142 is removed from the engagement portion 141, and the inspection pressing member 4 made of a bolt is screwed into the engagement portion 141 in the opened state. Then, the urging member 3 arranged below the gate body 1 is pressed downward by the pressing member 4 for inspection. Specifically, by screwing the pressing member 4 for inspection, the lower (Z2 direction) tip of the pressing member 4 for inspection comes into contact with the lid portion 32 . By further screwing the inspection pressing member 4 , the compression coil spring 31 is pressed downward via the lid portion 32 .

Then, a force corresponding to the amount of downward deformation of the biasing member 3 (biasing force corresponding to the amount of compression of the compression coil spring) is applied upward, thereby biasing the gate body 1 upward.

As shown in FIG. 4, by further screwing the inspection pressing member 4, the amount of downward deformation of the biasing member 3 increases, and the biasing force that biases the gate body 1 upward increases. When the moment due to the urging force that urges the gate body 1 upward becomes greater than the moment that rotates the gate body 1 downward and the moment due to the resistance, the gate body 1 floats up.

When the inspection is performed by inserting the inspection pressing member 4 into the engaging portion 141 of the gate body 1 up to the reference line 41, whether the gate body 1 is lifted by a predetermined amount or more is determined to determine whether or not it is normal. If the gate body 1 floats up by a predetermined amount, it can be judged to be normal (no abnormality). Also, if the gate body 1 does not float up, or if it floats up by less than a predetermined amount, it can be determined that it is not normal (abnormal). That is, since the buoyancy of the gate body 1 is known, (biasing force of the biasing member 3 when the inspection pressing member 4 is inserted up to the reference line 41)×(distance L1) is (buoyancy)×(distance L2 ) x (safety factor) to determine the inspection result. The distance L1 is the length from the rotation axis 11 to the engaging portion 141, and the distance L2 is the length from the rotation axis 11 to the center of buoyancy of the gate body 1. Also, the safety factor is set to a value of approximately 0.7 or more and 0.8 or less, for example.

When the inspection is performed by inserting the inspection pressing member 4 into the engaging portion 141 until the gate body 1 is lifted, the amount of insertion (the amount of deformation of the compression coil spring) is measured. Then, it is determined whether (insertion amount of inspection pressing member 4)×(spring constant of compression coil spring)×(distance L1) is smaller than (buoyancy)×(distance L2)×(safety factor). The test results are determined by

In this case, the (insertion amount of the inspection pressing member 4) corresponding to (buoyancy)×(distance L2)×(safety factor) can be obtained by calculation, so the reference line 41 should be provided at that position. Therefore, the inspection result may be determined by whether or not the inspection pressing member 4 is inserted up to the reference line 41 . That is, if the pressing member 4 for inspection is not inserted up to the reference line 41, it can be determined that the device is normal (no abnormality). Also, if the pressing member 4 for inspection is inserted beyond the reference line 41, it can be determined that it is not normal (abnormal).

Since there are a plurality of biasing members 3 , the moment of the biasing force that biases the gate body 1 upward can be obtained by summing the moments of the biasing forces of the plurality of biasing members 3 .

(Effect of this embodiment)
The following effects can be obtained in this embodiment.

In this embodiment, as described above, when inspecting the movement of the gate body 1 , the inspection pressing member 4 is engaged with the engaging portion 141 and the urging member 3 is pushed downward by the inspection pressing member 4 . The gate body 1 is configured to be pressed upward by the biasing member 3 . As a result, it is possible to inspect whether or not the gate body 1 moves due to buoyancy using the inspection pressing member 4 that presses the urging member 3 arranged below the gate body 1 downward. There is no need to prepare a load cell such as a load cell, a lever block, a lifting device such as a crane for lifting the gate body, etc. for inspection. As a result, the floating gate 100 can be easily inspected with a simple configuration.

Further, in the present embodiment, as described above, the biasing member 3 includes the compression coil spring 31 and the lid portion 32 that is arranged above the compression coil spring 31 and with which the inspection pressing member 4 abuts. As a result, it is possible to generate an urging force using the compression coil spring 31 having a simple configuration, thereby suppressing complication of the device configuration. Further, the biasing force of the compression coil spring 31 can be reliably transmitted to the inspection pressing member 4 via the lid portion 32 .

Further, in the present embodiment, as described above, the recess 321 (322) is provided in the lid portion 32 with which the tip of the pressing member 4 for inspection enters and abuts. As a result, it is possible to suppress displacement of the contact position of the inspection pressing member 4 against the lid portion 32 , so that the urging force can be more reliably transmitted from the compression coil spring 31 to the inspection pressing member 4 . That is, even if the angle at which the tip of the pressing member for inspection 4 abuts against the lid portion 32 changes with the rotation of the gate body 1, the position of the tip of the pressing member for inspection 4 is displaced by the concave portion 321 (322). is suppressed, the urging force can be reliably transmitted from the compression coil spring 31 to the inspection pressing member 4 .

Moreover, in this embodiment, as described above, the casing 33 is provided so as to surround the compression coil spring 31 . As a result, the casing 33 can restrict the deformation of the compression coil spring 31 only in the expansion/contraction direction, so that bending of the compression coil spring 31 can be suppressed. As a result, the biasing force of the compression coil spring 31 can be efficiently transmitted to the gate body 1 .

In addition, in this embodiment, as described above, a plurality of biasing members 3 are provided in the horizontal direction (X direction) perpendicular to the direction in which the gate body 1 dams up water. As a result, the urging forces of the plurality of urging members 3 can be applied, so that even the gate body 1 having a large mass can be easily moved and inspected.

[Modification]
It should be noted that the embodiments disclosed this time should be considered as examples and not restrictive in all respects. The scope of the present invention is indicated by the scope of the claims rather than the description of the above-described embodiments, and includes all modifications (modifications) within the meaning and scope equivalent to the scope of the claims.

For example, in the above-described embodiment, an example of a structure in which the gate body is lifted up by buoyancy and stands up is shown, but the present invention is not limited to this. In the present invention, the gate body may be configured to stand up due to the action of the gravity of the counterweight and the elastic force of a spring in addition to the buoyancy.

Further, in the above-described embodiment, an example of a configuration in which the gate body is rotated and stood up to block water is shown, but the present invention is not limited to this. In the present invention, the gate body may translate by levitation to dam water.

Moreover, although the example of the structure provided with three biasing members was shown in the said embodiment, this invention is not limited to this. In the present invention, one, two, or four or more biasing members may be provided.

Moreover, in the above-described embodiment, an example of a configuration in which the biasing member includes a compression coil spring has been described, but the present invention is not limited to this. In the present invention, the biasing member may contain an elastic body such as a leaf spring, a torsion spring, or rubber.

Further, in the above embodiment, an example in which the pressing member for inspection is configured by a bolt was shown, but the present invention is not limited to this. In the present invention, the pressing member for inspection may be other than the bolt as long as it engages the engaging portion. For example, one of the pressing member for inspection and the engaging portion may be provided with a convex portion, and the other may be provided with a concave portion that engages with the convex portion to engage the pressing member for inspection and the engaging portion.

Further, in the above-described embodiment, the compression coil spring has a natural length and is arranged in the casing, but the present invention is not limited to this. In the present invention, the compression coil spring may be placed in a somewhat compressed state during normal operation (the state in which it is not pressed by the pressing member for inspection).

REFERENCE SIGNS LIST 1 gate body 3 urging member 4 pressing member for inspection 31 compression coil spring 32 lid portion 33 casing 100 floating gate 141 engaging portion 321, 322 recessed portion

Claims (6)

a gate body that moves by buoyancy to dam water when water flows in;
a biasing member arranged below the gate body and applying a force upward according to the downward deformation amount;
The gate main body is provided at a position facing the biasing member, into which is inserted an inspection pressing member for pressing the biasing member downward, and the inspection pressing member presses the biasing member. including an engaging portion that engages with the inspection pressing member in the state of
When inspecting the movement of the gate main body, the inspection pressing member is engaged with the engaging portion, and the inspection pressing member presses the biasing member downward so that the gate body is inspected by the biasing member. A floating gate configured to bias the body upward. 2. The floating gate according to claim 1, wherein said biasing member includes a compression coil spring, and a lid portion disposed above said compression coil spring and against which said inspection pressing member abuts. 3. The floating gate according to claim 2, wherein said lid has a recess into which said tip of said pressing member for inspection enters and abuts. 4. The floating gate according to claim 2, further comprising a casing arranged to surround said compression coil spring. The floating gate according to any one of claims 1 to 4, wherein a plurality of said urging members are provided in a horizontal direction perpendicular to a direction in which said gate body dams water. A floating gate inspection method comprising a gate body that moves by buoyancy to block water when water flows in, comprising:
an inspection pressing member is inserted into and engaged with an engaging portion provided in the gate body, and the inspection pressing member presses downward a biasing member disposed below the gate body;
A method of inspecting a floating gate, wherein the gate body is urged upward by applying a force corresponding to the amount of downward deformation of the urging member, thereby inspecting movement of the gate body.

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