JP2021067117A - Undulating gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate installation and removal work of a door body in an undulating gate provided with a thrust receiver. An undulating gate 1 is provided in water and moves a door body 10 that rotates around a predetermined axis X between an inverted state and an upright state and a door body 10 in the direction of the axis X. It is equipped with a thrust receiver 4 to limit. The door body 10 has a contact portion 14 provided so as to face the thrust receiver 4 in the direction of the axis X. The thrust receiver 4 has a base 41 and an attachment 42 that is detachably attached to the base 41 and faces the contact portion 14 in the direction of the axis X. [Selection diagram] Fig. 2

Description

The techniques disclosed herein relate to undulating gates.

For example, Patent Document 1 discloses an undulating gate provided in water and provided with a door body that rotates between an inverted state and an upright state around a predetermined axial center. The door body is supported so as to be rotatable around the axis.

Japanese Unexamined Patent Publication No. 2019-44551

When such a door body is displaced in the direction of the axis (so-called thrust direction), it may be difficult to properly rotate between the laid-down state and the upright state. Therefore, it is conceivable to install a thrust receiver that restricts the movement of the door body in the direction of the axis.

However, according to such a thrust receiver, the movement of the door body in the axial direction can be restricted, but the work of attaching and detaching the door body becomes complicated. In particular, since the door body is installed underwater, the door body is affected by water such as waves when the door body is attached and detached. As a result, in a situation where positioning in the direction of the axis is required with high accuracy, the work of attaching and detaching the door body underwater becomes very difficult.

The technique disclosed herein has been made in view of this point, and the purpose thereof is to facilitate the installation and removal work of the door body at the undulating gate provided with the thrust receiver.

The undulating gate disclosed herein is provided in water and restricts the movement of the door body in the direction of the axis and the door body rotating between the laid state and the upright state around a predetermined axis. The door body includes a thrust receiver, and the door body has a contact portion provided so as to face the thrust receiver in the direction of the axis, and the thrust receiver is detachably attached to the base and the base. It has an attachment facing the contact portion in the direction of the axis.

According to the undulating gate, it is possible to facilitate the installation and removal work of the door body in the undulating gate provided with the thrust receiver.

FIG. 1 is an overview view of a port where a undulating gate type breakwater is installed. FIG. 2 is a front view of the upright undulating gate as viewed from the side of the first water area. FIG. 3 is a schematic side view of the undulating gate in the laid-down state. FIG. 4 is a partially enlarged view of the side view of the door body, which is enlarged centering on the shaft portion. FIG. 5 is a partially enlarged view of the front view of the undulating gate, which is enlarged centering on the contact portion and the thrust receiver. FIG. 6 is a perspective view of the attachment.

Hereinafter, exemplary embodiments will be described in detail with reference to the drawings. FIG. 1 is an overview view of the port where the undulating gate type breakwater 100 is installed.

For example, the undulating gate type breakwater 100 is installed in the ocean, more specifically in a harbor, as a countermeasure against tsunamis and storm surges. The undulating gate type breakwater 100 is arranged so as to partition the first water area A and the second water area B. When the undulating gate type breakwater 100 is installed in a harbor, the water area outside the harbor is the first water area A, and the water area inside the harbor is the second water area B.

The undulating gate type breakwater 100 includes an undulating gate 1 and a levee body 9.

The embankment body 9 is formed with an opening 91 that communicates the first water area A and the second water area B. The undulating gate 1 is provided in the opening 91. The embankment body 9 is arranged so as to face each other, and has a first side wall 92 and a second side wall 93 for partitioning the opening 91.

FIG. 2 is a front view of the upright undulating gate 1 as viewed from the side of the first water area A. FIG. 3 is a schematic side view of the undulating gate 1 in the laid-down state. The undulating gate 1 is provided in water and has a door body 10 that rotates around a predetermined axis X between an inverted state and an upright state, and a thrust receiver that restricts the movement of the door body 10 in the direction of the axis X. It is equipped with 4. In FIG. 3, the thrust receiver 4 is not shown. Here, "provided in water" means that it is at least partially placed in water. That is, the door body 10 provided in the water does not need to be arranged in the water as a whole. For example, the door body 10 provided in water may include a configuration in which a part of the door body 10 is exposed on water in an upright state as described later.

The door body 10 opens and closes the opening 91. As shown in FIG. 1, the door body 10 is arranged between the first side wall 92 and the second side wall 93. The number of door bodies 10 can be set arbitrarily. In this example, the undulating gate 1 has four door bodies 10. The four door bodies 10 are arranged between the first side wall 92 and the second side wall 93.

The door body 10 has a main body 11 and a shaft portion 12 extending concentrically with respect to the shaft center X. For example, the main body 11 is formed in a substantially rectangular flat plate shape. An air chamber (not shown) is formed inside the main body 11. The shaft portion 12 is provided on a portion of the main body 11 corresponding to one side of a rectangle. The shaft portion 12 is formed in a substantially columnar shape. As shown in FIG. 1, the plurality (four) door bodies 10 are arranged so that the shaft portions 12 are arranged in a straight line.

The shaft portion 12 is arranged in water (that is, in the sea). The shaft portion 12 is rotatably supported by the bearing 2 (see FIG. 2). As a result, the door body 10 rotates about the shaft portion 12 between an inverted state (see the solid line in FIG. 3) and an upright state (see the alternate long and short dash line in FIG. 3).

In the collapsed state, the entire door body 10 is submerged in water. In the laid-down state, the door body 10 is laid down so that the shaft portion 12 of the door body 10 is on the second water area B side and the end of the door body 10 opposite to the shaft portion 12 is on the first water area A side. (See Fig. 1). In the collapsed state, the door body 10 opens the opening 91.

As shown in FIG. 3, a storage portion 94 for storing the door body 10 in the collapsed state is formed on the water bottom (that is, the sea floor). The storage portion 94 is formed in a box shape that opens upward. The planar shape of the storage portion 94 is substantially rectangular, and has a shape capable of accommodating the door body 10. In this example, one storage unit 94 common to the four door bodies 10 is provided.

The door body 10 is moored in a prone state by the mooring mechanism 3. The mooring mechanism 3 has a hook 31. The hook 31 is configured to be rotatable around a predetermined axial center. The hook 31 is rotationally driven around the axis by a drive unit (not shown). The door body 10 is provided with an engaging pin 13. The hook 31 engages with the engaging pin 13 of the door body 10 in the laid-down state by rotating in one of the circumferential directions about the axis. The door body 10 is moored by the engagement of the hook 31 with the engagement pin 13. The hook 31 is disengaged from the engaging pin 13 by rotating in the other direction in the circumferential direction about the axis. When the hook 31 is disengaged from the engaging pin 13, the door body 10 rotates from the inverted state to the upright state due to the buoyancy received by the door body 10.

In the upright state, the door body 10 partially protrudes above the water. In the upright state, the door body 10 closes the opening 91.

A force that causes the door body 10 to swing up and down due to waves may act on the door body 10 in the collapsed state. The door body 10 can swing while maintaining a state of being moored in a prone state. For example, when the water level rises due to waves, the door body 10 tries to rotate downward. On the other hand, when the water level drops due to waves, the door body 10 tries to rotate upward. Under the influence of such waves, the door body 10 swings within a range in which the hook 31 is not disengaged from the engaging pin 13.

FIG. 4 is a partially enlarged view of the side view of the door body 10 with the shaft portion 12 as the center. As shown in FIGS. 2 and 4, the door body 10 has a contact portion 14 provided so as to face the thrust receiver 4 in the direction of the axis X. The contact portion 14 is provided on the shaft portion 12. The contact portion 14 projects from the shaft portion 12 in the radial direction centered on the axis X. Further, the contact portion 14 extends in an arc shape in the circumferential direction centered on the axis X. Specifically, a pair of flat plates 14a facing the contact portion 14 and spreading in a substantially fan shape around the axis X, and a plurality of flat plate-shaped ribs 14b (six in this example) connecting the pair of flat plates 14a. And have. The plurality of ribs 14b are arranged at intervals in the circumferential direction centered on the axis X. The plurality of ribs 14b are formed so as to extend in a substantially radial direction about the axis X.

As shown in FIG. 2, two thrust receivers 4 are provided for one door body 10. The pair of thrust receivers 4 are arranged in the direction of the axis X. The contact portion 14 is arranged between the two thrust receivers 4.

The two thrust receivers 4 are configured to be line-symmetrical with respect to the contact portion 14. Hereinafter, the configuration of one thrust receiver 4 will be described, and the description of the configuration of the other thrust receiver 4 will be omitted. FIG. 5 is a partially enlarged view of the front view of the undulating gate, which is enlarged centering on the contact portion and the thrust receiver. The thrust receiver 4 has a base 41 and an attachment 42 that is detachably attached to the base 41 and faces the contact portion 14 in the direction of the axis X.

The base 41 is fixed to the storage unit 94. The base 41 has a mounting surface 41a to which the attachment 42 is mounted. The mounting surface 41a faces the contact portion 14. More specifically, the base 41 has a receiving portion 41b located on the side opposite to the contact portion 14 with respect to the attachment 41 in the direction of the axis X. That is, the contact portion 14, the attachment 42, and the receiving portion 41b are arranged in this order in the direction of the axis X. The attachment 42 is attached to the base 41 in contact with the receiving portion 41b. In this example, the mounting surface 41a is formed on the receiving portion 41b. The base 41 is formed with a work space 41c for attaching the attachment 42 to the base 41 on the opposite side of the receiving portion 41b from the attachment 42. The work space 41c is opened in a direction intersecting the direction of the axis X (specifically, a direction orthogonal to the direction of the axis X). Four through holes are formed in the receiving portion 41b. When the attachment 42 is attached to the receiving portion 41b, a bolt is inserted into the through hole.

The attachment 42 has a main body 43 and a bush 44. The main body 43 is detachably attached to the base 41 (specifically, the attachment surface 41a) via bolts.

FIG. 6 is a perspective view of the attachment 42. The main body 43 has a pair of substantially square first flat plates 43a and second flat plates 43b facing each other, and a web 43c connecting the first flat plate 43a and the second flat plate 43b. The web 43c is formed in a shape having a substantially cross-shaped cross section. The first flat plate 43a is bolted to the mounting surface 41a in a state of being overlapped with the mounting surface 41a. A work space 42a for attaching the attachment 42 to the base 41 is formed between the first flat plate 43a and the second flat plate 43b. The work space 42a is divided into four by the web 43c. The work space 42a is opened in a direction intersecting the direction of the axis X (specifically, a direction orthogonal to the direction of the axis X). Four through holes 43d are formed in the first flat plate 43a. When the first flat plate 43a is attached to the attachment surface 41a, a bolt is inserted into the through hole 43d. The four through holes 43d are arranged so as to correspond to each of the four work spaces 42a.

The bush 44 is formed in a substantially square flat plate shape. The bush 44 has a base plate 44a and a sliding plate 44b. The sliding plate 44b is bolted to the base plate 44a in a state of being overlapped with the base plate 44a. The contact portion 14 is made of a member that is harder than the sliding plate 44b, that is, is not easily worn. That is, if it wears, the sliding plate 44b wears more than the contact portion 14. For example, when the contact portion 14 is made of metal, the sliding plate 44b is made of resin. The bush 44 is detachably attached to the main body 43 via bolts. At this time, the base plate 44a is superposed on the second flat plate 43b of the main body 43. The bush 44 (specifically, the sliding plate 44a) is arranged so as to face the contact portion 14.

In the pair of thrust receivers 4 configured in this way, as shown in FIG. 5, the distance D1 (that is, the bush 44, more specifically, the two sliding plates 44b) in the direction of the axis X of the two attachments 42 The distance in the direction of the axis X) is slightly larger than the width W in the direction of the axis X of the contact portion 14. Therefore, the resistance when the door body 10 rotates is reduced.

When the door body 10 rotates between the laid-down state and the upright state, or when the door body 10 swings up and down in the laid-down state, the contact portion 14 comes into contact with any one of the pair of thrust receivers 4. The movement of the door body 10 in the direction of X is restricted. The contact portion 14 contacts any of the pair of thrust receivers 4 not only when the door body 10 rotates around the axis X but also when the door body 10 moves in the direction of the axis X due to the influence of an earthquake or the like. Can be. Even in such a case, the thrust receiver 4 restricts the movement of the door body 10 in the direction of the axis X.

At the undulating gate 1 configured in this way, when the door body 10 is attached and detached, the attachment 42 of the thrust receiver 4 is removed. This facilitates the attachment and detachment of the door body 10. Specifically, the gap between the contact portion 14 and the thrust receiver 4 in the direction of the axis X is very small. In addition, since the shaft portion 12 is arranged in water, the door body 10 is affected by water (for example, the influence of waves) when the door body 10 is attached or detached, and high accuracy is required for the positioning of the door body 10. It's difficult. Therefore, it is difficult to attach and remove the door body 10 with the thrust receiver 4 installed. Therefore, it is conceivable to remove the entire thrust receiver 4 and then attach and remove the door body 10. However, since the thrust receiver 4 is a heavy object and the work of removing the thrust receiver 4 is a manual work in water, the work of attaching and detaching the thrust receiver 4 is not easy.

On the other hand, by forming a part of the thrust receiver 4 with the detachable attachment 42, the attachment and detachment work of the attachment 42 in water becomes easy. Further, since the attachment 42 is a portion of the thrust receiver 4 facing the contact portion 14, the distance D2 in the direction of the axis X of the pair of bases 41 in the state where the attachment 42 is removed (that is, the axis of the mounting surface 41a). The distance in the direction of X) is larger than the distance D1 between the two attachments 42, and as a result, is sufficiently larger than the width W of the contact portion 14. In this state, when the door body 10 is removed, even if the door body 10 is slightly displaced in the direction of the axis X, the contact portion 14 does not come into contact with the base 41, and the door body 10 can be smoothly removed. Can be done. Further, when mounting the door body 10, the door body 10 may be lowered so that the contact portion 14 is arranged between the two mounting surfaces 41a, and high positioning accuracy is not required. Even if the door body 10 is slightly displaced in the direction of the axis X due to the influence of water, the contact portion 14 does not come into contact with the base 41, and the door body 10 can be smoothly attached.

In addition, the contact portion 14 of the door body 10 may slide on the attachment 42. That is, since the contact portion 14 can move in the direction of the axis X between the pair of thrust receivers 4, the contact portion 14 is in contact with one thrust receiver 4 in the state of using the undulating gate 1. It can be. When the door body 10 rotates or swings in this state, the contact portion 14 slides with respect to the thrust receiver 4. The portion of the thrust receiver 4 that can come into contact with the contact portion 14 is the attachment 42, and more specifically, the bush 44. The bush 44 needs to be replaced because it wears due to the sliding of the contact portion 14. That is, by making the portion of the thrust receiver 4 including the bush 44 a removable attachment 42, the worn portion of the thrust receiver 4 can be easily replaced.

Further, in such a configuration, the receiving portion 41b is in contact with the attachment 42 attached to the base 41 from the side opposite to the contact portion 14. Since the attachment 42 is a portion on which the contact portion 14 slides, a pressing force from the contact portion 14 in the direction of the axis X can act. The pressing force received by the attachment 42 from the contact portion 14 in the direction of the axis X is received by the receiving portion 41b of the base 41.

Further, since the attachment 42 is formed with a work space 42a, it is possible to facilitate the attachment / detachment work of the attachment 42. Specifically, the work space 42a is opened in a direction intersecting the direction of the axis X (specifically, a direction orthogonal to the direction of the axis X). Therefore, the operator can put his / her hand in the work space 42a to tighten the bolt or nut for attaching the first flat plate 43a to the attachment surface 41a, or remove the bolt or nut. The work space 42a can be omitted depending on how the attachment 42 is attached to the base 41.

The work space 42a also functions as a work space for attaching the bush 44 to the main body 43. Specifically, the second flat plate 43b is formed with a through hole into which a bolt is inserted, and the base plate 44a is formed with a screw hole. The operator can put his / her hand in the work space 42a to tighten or remove the bolt for attaching the bush 44 to the main body 43.

In addition, since the work space 41c is formed in the base 41, the attachment / detachment work of the attachment 42 can be easily attached / detached. Specifically, the work space 41c is opened in a direction intersecting the direction of the axis X (specifically, a direction orthogonal to the direction of the axis X). Therefore, the operator can put his / her hand in the work space 41c to tighten the bolt or nut for attaching the first flat plate 43a to the attachment surface 41a, or remove the bolt or nut. If the base 41 is provided with a screw hole or a welding nut into which a bolt is screwed, the work space 41c can be omitted.

As described above, the undulating gate 1 is provided in water, and the door body 10 that rotates around a predetermined axis X between the laid state and the upright state and the door body 10 that moves in the direction of the axis X The door body 10 has a contact portion 14 provided so as to face the thrust receiver 4 in the direction of the axis X, and the thrust receiver 4 has a base 41 and a base 41. It is detachably attached to the door and has an attachment 42 facing the contact portion 14 in the direction of the axis X.

According to this configuration, by removing the attachment 42, the gap between the contact portion 14 and the thrust receiver 4 becomes large, so that the positioning accuracy required for the door body 10 at the time of mounting and removing the door body 10 is reduced. be able to. As a result, the door body 10 can be easily attached and detached. At this time, the attachment 42, which is a part of the thrust receiver 4, is removed instead of removing the entire thrust receiver 4. Therefore, the attachment 42 can be easily attached and detached in water. In addition, the attachment 42 is a portion facing the contact portion 14, and the contact portion 14 may slide with respect to the attachment portion 42 when the door body 10 rotates. That is, the attachment 42 may wear. By making the attachment 42 removable, it is possible to easily replace the worn portion of the thrust receiver 4.

Further, the door body 10 further includes a main body 11 and a shaft portion 12 extending concentrically with respect to the axis X, and the contact portion 14 is a shaft portion so as to project in the radial direction about the axis X. 12 is provided.

For example, as the arrangement of the thrust receiver 4 that restricts the movement of the door body 10 in the direction of the axis X, the end face 11a (see FIG. 2) of the main body 11 in the direction of the axis X or the axis 12 of the shaft portion 12 is arranged. Arranging the thrust receiver 4 so as to face the end face 12a (see FIG. 2) in the X direction is one of the simplest arrangements. However, since the end faces 11a and 12a of the door body 10 may be restricted in terms of sealing property and the like, it may be desired to arrange the thrust receiver 4 at a position other than the position facing such end faces. By providing the contact portion 14 so as to protrude from the shaft portion 12 in the radial direction centered on the axis X, the thrust receiver 4 is provided at a position other than the position facing the end surface 11a of the main body 11 or the end surface 12a of the shaft portion 12. Easy to place. As a result, for example, it becomes easy to realize a configuration in which a plurality of door bodies 10 as shown in FIG. 1 are arranged without a gap in the direction of the axis X.

Further, two thrust receivers 4 are provided side by side in the direction of the axis X, and the contact portion 14 is arranged between the two thrust receivers 4.

According to this configuration, the movement of the door body 10 to both sides in the direction of the axis X can be restricted. Further, in such a configuration, when a part of the thrust receiver 4 is not configured by the attachment 42, high positioning accuracy is required in the attachment / detachment work of the door body 10. However, by forming a part of the thrust receiver 4 with the attachment 42 as described above, the door body 10 can be easily attached and detached. That is, it is very effective to configure a part of the thrust receiver 4 with the attachment 42.

<< Other Embodiments >>
As described above, the above-described embodiment has been described as an example of the technology disclosed in the present application. However, the technique in the present disclosure is not limited to this, and can be applied to embodiments in which changes, replacements, additions, omissions, etc. are appropriately made. It is also possible to combine the components described in the above embodiment to form a new embodiment. In addition, among the components described in the attached drawings and detailed explanations, not only the components essential for problem solving but also the components not essential for problem solving in order to illustrate the above-mentioned technology. Can also be included. Therefore, the fact that those non-essential components are described in the accompanying drawings or detailed description should not immediately determine that those non-essential components are essential.

For example, undulating gates are not limited to those installed in ports. The undulating gate may be installed in a river, an estuary, or the like. Further, the undulating gate does not have to form an undulating gate type breakwater together with the embankment body 9. That is, the undulating gate may be installed not in the opening of the embankment but in the opening partitioned by the opposite side walls such as the first side wall and the second side wall in the river or the estuary.

The undulating gate 1 has four door bodies 10, but the number of door bodies 10 is not limited to this. The number of door bodies 10 may be 1, 2, 3, or 5 or more.

Further, the contact portion 14 is not limited to the above-mentioned configuration. For example, the contact portion 14 may be an end face 11a of the main body 11 in the direction of the axis X, or an end face 12a of the shaft portion 12 in the direction of the axis X. In that case, the thrust receiver 4 is arranged so as to face the end face.

In the above-mentioned undulating gate 1, one contact portion 14 is provided on one door body 10, and two thrust receivers 4 are provided so as to sandwich the contact portion 14, but the present invention is not limited to this. .. For example, two sets of contact portions and thrust receivers may be provided for one door body 10. In that case, the movement of the door body 10 to one side in the direction of the axis X is restricted by the contact portion and the thrust receiver of one set, and the axis X of the door body 10 is restricted by the contact portion and the thrust receiver of the other set. Movement to the other side of the direction is restricted. Alternatively, when limiting the movement of the door body 10 in the direction of the axis X only to one side, only one set of contact portions and thrust receivers may be provided.

The above-mentioned configuration of the thrust receiver 4 is only an example. For example, the attachment surface 41a of the base 41 to which the attachment 42 is attached does not have to be the surface facing the contact portion 14. As long as the attachment 42 is arranged to face the contact portion 14, for example, the attachment 42 may be attached to the upward facing surface of the base 41.

As described above, the techniques disclosed herein are useful for undulating gates.

1 Undulating gate 10 Door body 11 Main body 12 Shaft part 14 Contact part 4 Thrust receiver 41 Base 42 Attachment X Axis center

Claims (3)

A door body that is provided in water and rotates around a predetermined axis between an inverted state and an upright state.
It is provided with a thrust receiver that limits the movement of the door body in the direction of the axis.
The door body has a contact portion provided so as to face the thrust receiver in the direction of the axis.
The thrust receiver is an undulating gate having a base and an attachment detachably attached to the base and facing the contact portion in the direction of the axis. At the undulating gate according to claim 1,
The door body further includes a main body and a shaft portion extending concentrically with respect to the shaft center.
The contact portion is an undulating gate provided on the shaft portion so as to project in the radial direction about the axis. At the undulating gate according to claim 2,
Two thrust receivers are provided side by side in the direction of the axis.
The contact portion is an undulating gate arranged between the two thrust receivers.

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