KR102611415B1 - Suspension device and dredging device using the same, suspending method using the suspension device, and dredging method using the dredging device - Google Patents

Abstract

The purpose is to provide a small-scale, low-cost hanging device with excellent work efficiency and measurement precision, a dredging device using the same, a hanging method, and a dredging method using the same.
The suspension device to which the present invention is applied includes a main sling that hangs approximately horizontally on a crane, a main body holder that maintains the main body to be suspended and can adjust flotation and flooding with a ballast tank for the main body, and an intermediate sling between the main sling and the main body holder. An intermediate sling capable of adjusting floating and submersion with a ballast tank for use, and a connecting wire installed in a folded state by a regulating wire on at least one side between the main body holding part and the intermediate sling and between the main sling and the intermediate sling, are installed in a folded state by a regulating wire when the connecting wire is deployed. It is equipped with a foldable deployment structure in which the regulating wire is separated in a storage state, the main sling or intermediate sling is raised while leaving the main body holding part or the intermediate sling on the water, and the connecting wires are arranged almost parallel to each other.

Description

A hanging device, a dredging device using the same, a hanging method using the hanging device, and a dredging method using the dredging device. DEVICE}

The present invention relates to a hanging device, a dredging device using the same, a hanging method using the hanging device, and a dredging method using the dredging device.

More specifically, it relates to a small-scale, low-cost hanging device with excellent work efficiency and measurement accuracy, a dredging device using the same, a hanging method using the hanging device, and a dredging method using the dredging device.

Conventionally, in freshwater areas such as lakes, rivers, dams, and reservoirs, or seawater areas such as ports, fishing areas, and harbor areas, a suspension device is suspended by a crane installed on a watercraft or land and lowered to the bottom of the water. Technologies for performing various operations and measurements using work devices and measuring devices mounted on devices are known (see, for example, Patent Document 1).

The above technology relates to a dredging device. The dredging device is a suspension device equipped with a dredging jet nozzle or a suction pump. Among these, the spoon is excavated and agitated by a jet stream from the jet nozzle, thereby accumulating. A stirring suction treatment is performed in which the raised sediment is sucked up by the suction pump described above.

In addition, the sediment is contaminated mud with concentrated harmful substances deposited on the bottom of the spoon. Since it contains a lot of organic components and is lighter than ordinary contaminated mud, it is possible to suck up a large amount of sediment in a short time by the above-mentioned agitation and suction treatment.

And the suspension device is a sling consisting of an octagon-shaped frame suspended approximately horizontally by a plurality of wire ropes (hereinafter referred to as crane wires) mounted on the tip of the crane, and a trumpet-shaped sling with a ballast tank installed around the outer circumference. It is provided with a part having a hood part (hereinafter referred to as the main body holding part).

In addition, the hanging object parts (hereinafter referred to as the main body) such as the jet nozzle and suction pump described above are installed and maintained in the main body holding part, so that the functional part (hereinafter referred to as the device main body) where work such as dredging or measurement is performed is performed. .) is formed.

Additionally, the main body holding portion is suspended near the lower portion of the sling described above through a plurality of connecting wires.

Meanwhile, the demand to further increase the depth at which operations and measurements can be performed has been increasing in recent years in terms of useful use of marine resources and elimination of environmental pollution.

Therefore, in response to this, in the above-described technology, a countermeasure was devised to lower the sling deeply by using a long wire as a crane wire, thereby deepening the depth position of the main body portion held by the main body holding portion disposed close to the sling.

Publication No. 2007-92410

However, in order to use a long crane wire with the above-mentioned suspension device, a plurality of long crane wires are vertically lowered from the tip of the crane, and a sling with a main body holding part installed near the lower side at the lower end of the plurality of crane wires is connected in a horizontal state. After this, it is necessary to further loosen the crane wire and lower the main body holding part to the vicinity of the deep water bottom, so a hoisting device for hoisting and hoisting down a plurality of long crane wires must be installed on the crane side or the suspension device side. This is necessary, resulting in an increase in device cost and an increase in the size of the hanging device.

Furthermore, in the case where a plurality of long crane wires are opened radially downward from the tip of the crane as in the above-mentioned suspension device to suspend and maintain the sling, the main body held by the crane is suspended in water and horizontally. When various work or measurements are performed while moving, the main body holding part suspended near the lower part of the sling due to water resistance during horizontal movement generates a horizontal rotational movement or pendulum movement centered on the tip of the crane, and is held in the main body holding part. The posture of the main body becomes unstable, and the position of the working device or measuring device relative to the spoon changes greatly, significantly reducing work efficiency and measurement precision.

For example, in the above-described dredging device, the position of the jet nozzle or the sediment inlet of the suction pump relative to the water bottom varies greatly, significantly reducing the dredging effect.

The present invention was created in consideration of the above points, and is a small-scale, low-cost hanging device with excellent work efficiency and measurement precision, a dredging device using the same, a hanging method using the hanging device, and dredging using the dredging device. The purpose is to provide a method.

In order to achieve the above object, the suspension device of the present invention is mounted on the tip of the support moving device and maintains the main sling, which is suspended horizontally, and the main body portion that is the object of suspension, and is capable of adjusting flotation and flooding through the injection and drainage of the ballast tank for the main body. A main body holding part, an intermediate sling installed between the main sling and the main body holding part and capable of adjusting floating and flooding through injection and drainage of the intermediate ballast tank, and between the main body support part and the intermediate sling, the main sling and the intermediate sling A plurality of connecting members are installed and maintained in a folded state by a regulating mechanism on at least one side thereof, and the regulating mechanism is separated in a storage force state when the connecting member is deployed, and the main body is maintained using the supporting moving device. A foldable deployment structure is provided in which the plurality of connection members can be arranged almost parallel to each other by raising the main sling and the intermediate sling while leaving the part on the water surface, or by raising the main sling while leaving the intermediate sling on the water surface.

And a main sling that is mounted on the tip of the support moving device and hangs approximately horizontally, a main body retainer that maintains the main body portion that is the object of suspension and can adjust floating and submersion through the injection and drainage of the ballast tank for the main body, and the main sling and main body retainer. High work efficiency and measurement precision can be secured by providing an intermediate sling that is installed between the parts and is capable of adjusting floating and flooding through the injection and drainage of the intermediate ballast tank.

That is, by suspending the main sling approximately horizontally and filling and draining each ballast tank, especially the ballast tank for the main body, the working device and measuring device can be freely set at a stable depth position, and the work performed on the spoon and the spoon according to the measurement items are made Optimization of distance can be achieved.

Furthermore, a plurality of connecting members are installed and maintained in a folded state by a regulating mechanism on at least one side between the main body holding portion and the intermediate sling and between the main sling and the intermediate sling, and at the same time, the regulating mechanism is used when the connecting members are deployed. The plurality of connection members are separated in a storage state and raised by using the support movement device to raise the main sling and the intermediate sling while leaving the main body holding part on the water surface, or by raising the main sling while leaving the intermediate sling on the water surface. By providing a foldable deployment structure that can be installed almost parallel to each other, it is possible to reliably achieve a reduction in device cost, miniaturization of the hanging device, and high work efficiency and measurement accuracy.

That is, after the regulating mechanism is separated by manpower to separate the regulating mechanism into a low-force state, a plurality of connecting members can be easily deployed using a support moving device, and large and expensive equipment such as a lifting device required to release the connecting member can be used. Devices, etc. are unnecessary.

Moreover, during such deployment, a plurality of connecting members can be arranged almost parallel to each other, so as in the past, a plurality of connecting members, such as a plurality of long crane wires that open radially downward from the tip of the support moving device, are connected near the lower part of the sling by the lower ends of the connecting members. Unlike the case of supporting the main body holder, even when the main body holder suspended in water is horizontally moved by the support and movement device, horizontal rotational movement or pendulum movement centered on the tip of the support and movement device is difficult to occur, and the main body holder is difficult to produce. The maintained posture of the main body is stabilized, and positional fluctuations of the working device and measuring device with respect to the spoon can be suppressed.

In addition, the foldable deployment structure is removably installed between the main body holding part and the intermediate sling, and a first regulating mechanism that regulates the gap between the main body holding part and the intermediate sling to a predetermined length when installed, and the main body holding part A plurality of first connection members are installed and maintained in a folded state between and the intermediate sling, and when deployed, are longer than the first regulating mechanism due to the elevation of the main sling and the intermediate sling by the support movement device and are arranged substantially parallel to each other; , a second regulating mechanism that is detachably installed between the main sling and the intermediate sling and regulates the gap between the main sling and the intermediate sling to a predetermined length when installed, and a folded state between the main sling and the intermediate sling. A second connection member that is installed and maintained and is longer than the second regulating mechanism due to the elevation of the main sling by the support movement device when deployed and is arranged almost parallel to each other, and an intermediate sling of the first connection member and the second connection member. When attaching and detaching the connection member support mechanism, which includes a fixing structure for supporting the side end by fixing it to the intermediate sling, and the first regulating mechanism, the main body support portion is floated to the water surface by injection and drainage of the main body ballast tank. , When attaching and detaching the second regulation mechanism, the intermediate sling is floated on the water surface through the injection and drainage of the intermediate ballast tank, thereby reducing the respective intervals between the main body support and the intermediate sling and between the main sling and the intermediate sling, In the case of having an injection/drainage structure that can reduce the tension acting on the first regulation mechanism and the second regulation mechanism, the first regulation mechanism and the second regulation mechanism can be reduced to storage capacity simply by using existing devices such as a main body ballast tank and an intermediate ballast tank. In addition to being separable, the plurality of connection members can be installed almost parallel to each other with a simple configuration of installing and maintaining the plurality of connection members in a folded state between the main body support and the intermediate sling and between the main sling and the intermediate sling. there is.

As a result, a foldable deployment structure can be formed without installing a new device or complicated configuration, and further, device costs can be reduced and the hanging device can be miniaturized.

In addition, the connecting member support mechanism integrally connects the ends of the first connecting member and the second connecting member on the intermediate sling side to form an elongated connecting member, and supports the elongated connecting member to be slidable up and down on the intermediate sling. In the case of including a sliding structure, the main sling is lowered with a support moving device and integrated into the intermediate sling, so that the elongated connecting member longer than the first connecting member and the second connecting member protrudes downward from the intermediate sling, The main body support can be installed on the stage.

As a result, the suspension maintenance depth of the main body support can be made deeper than in the case of each connecting member alone, thereby further deepening the depth of work and measurement.

In addition, the connection member support mechanism includes a member to be fastened to which an intermediate sling side end of the first connection member and the second connection member is fastened, and which can be integrally connected between the first connection member and the second connection member, and one end It is possible to select either a fastened state in which the fastened portion is fastened or a sliding state in which one end is relatively slidably externally fitted to the elongated connecting member, and the other end includes a selection connection part connected to the intermediate sling. In this case, a fixing mechanism for supporting the intermediate sling side ends of the first and second connecting members by fixing them to the intermediate sling, and a sliding structure for supporting the long connecting member to be able to slide up and down on the intermediate sling are included in a single connecting member support mechanism. It can be combined.

As a result, the number of parts can be reduced, and part costs can be reduced and maintainability improved.

In addition, in order to achieve the above object, the dredging device of the present invention adjusts flotation and flooding through the injection and drainage of the main sling, which is mounted on the tip of the support moving device and hangs approximately horizontally, and the ballast tank for the main body installed at the intake port opposite to the bottom. At the same time, it is installed between the main sling and the device body to agitate the spoon while excavating it by a jet airflow from a jet nozzle installed near the bottom of the ballast tank for the main body to suck sediment from the inlet, and the main sling and the device body for intermediate use. An intermediate sling capable of adjusting floating and flooding through the injection and drainage of the ballast tank, and a plurality of connecting members on at least one side between the device body and the intermediate sling and between the main sling and the intermediate sling are installed and maintained in a folded state by a regulating mechanism. At the same time, when deploying the connecting member, the regulating mechanism is separated into a storage force state, and the main sling and the intermediate sling are raised while leaving the device body on the water surface using the support movement device, or the intermediate sling is raised on the water surface. It is provided with a foldable deployment structure in which the plurality of connecting members can be arranged in parallel with each other by raising the main sling while leaving it in the position.

In addition, the main sling is mounted on the tip of the support moving device and hangs approximately horizontally, and the injection/drainage of the main body ballast tank installed at the suction port opposite the spoon is used to adjust floating and flooding, and at the same time, a main sling is installed near the lower end of the main body ballast tank. It is installed between the main sling and the apparatus main body, which agitates the spoon while excavating it by the jet stream from the installed jet nozzle and sucks the sediment from the suction port, and floats and drains the intermediate ballast tank. High dredging efficiency can be achieved by providing an intermediate sling that can adjust submersion.

In other words, by suspending the main sling roughly horizontally and filling and draining the ballast tank, especially the ballast tank for the main body, the jet nozzle can be freely set to a stable depth position, thereby optimizing the flow rate and strength of the jet air stream reaching the cutlery, allowing it to reach the surface layer of the cutlery. It can be guided to the very bottom of the intake port by accumulating only the sediment that is present and causing it to rise.

Moreover, a plurality of connecting members are installed and maintained in a folded state by a regulating mechanism on at least one side between the device main body and the intermediate sling and between the main sling and the intermediate sling, and at the same time, when the connecting members are deployed, the regulating mechanism is provided with a storage force. separating the plurality of connection members by using the support movement device to raise the main sling and the intermediate sling while leaving the device body on the water surface, or by raising the main sling while leaving the intermediate sling on the water surface. By providing a foldable deployment structure that can be placed almost parallel to each other, it is possible to reliably achieve reduction in equipment cost, miniaturization of dredging equipment, and high dredging efficiency.

That is, in order to separate the regulating mechanism into a low-force state, the plurality of connecting members can be easily deployed using a support moving device after the regulating mechanism is separated by manpower, and large and expensive devices such as hoisting devices required to loosen the connecting member can be installed. Equipment, etc. becomes unnecessary.

Moreover, during the above deployment, a plurality of connecting members can be arranged substantially parallel to each other, so that, as in the past, a plurality of connecting members, such as a plurality of long crane wires, open radially downward from the tip of the support movement device, are positioned near the lower part of the sling. Unlike the case of supporting the main body of the device, even when the main body of the device held in water is horizontally moved by the support and movement device, horizontal rotational movement or pendulum movement centered on the tip of the support and movement device is difficult to occur, and the posture of the device main body is difficult to occur. It is stable and can suppress fluctuations in the position of the jet nozzle and sediment inlet relative to the bottom of the water.

In addition, the foldable deployment structure is detachably installed between the device main body and the intermediate sling, and a first regulating mechanism that regulates the gap between the device main body and the intermediate sling to a predetermined length when installed, and the device main body and the intermediate sling A plurality of first connection members are installed and maintained in a folded state between them, and when deployed, the main sling and the intermediate sling are raised by the support movement device, and are longer than the first regulating mechanism and are arranged substantially parallel to each other, A second regulating mechanism that is detachably installed between the main sling and the intermediate sling and regulates the gap between the main sling and the intermediate sling to a predetermined length when installed, and is installed in a folded state between the main sling and the intermediate sling A second connection member is maintained and is longer than the second regulating mechanism due to the elevation of the main sling by the support movement device when deployed and is arranged substantially parallel to each other, and an intermediate member between the first connection member and the second connection member. When attaching and detaching the connection member support mechanism including a fixing structure for supporting the sling side end by fixing it to the intermediate sling, and the first regulating mechanism, the device main body is floated on the water surface by injection and drainage of the ballast tank for the main body. , When attaching and detaching the second regulation mechanism, the intermediate sling is floated on the water surface through the injection and drainage of the intermediate ballast tank, thereby reducing the respective intervals between the device main body and the intermediate sling and between the main sling and the intermediate sling, thereby reducing the first In the case of having an injection/drainage structure that can reduce the tension acting on the regulating mechanism and the second regulating mechanism, the first regulating mechanism and the second regulating mechanism can be made by simply using existing devices such as a main body ballast tank and an intermediate ballast tank. It can be separated in a storage state, and at the same time, the plurality of connecting members are installed and maintained in a folded state between the device body and the intermediate sling, and between the main sling and the intermediate sling, so that the plurality of connecting members are almost parallel to each other. It can be installed side by side.

As a result, a foldable structure can be formed without installing a new device or configuration, further reducing device costs and miniaturizing the dredging device.

In addition, the connecting member support mechanism integrally connects the middle sling side end of the first connecting member and the second connecting member to form an elongated connecting member, and supports the elongated connecting member to be slidable up and down on the intermediate sling. In the case of including a sliding structure, the main sling is lowered with a support movement device and integrated into the intermediate sling, so that the elongated connecting member longer than the first connecting member and the second connecting member protrudes downward from the intermediate sling, The main body of the device can be installed on the stage.

As a result, the hanging depth of the device main body can be made deeper than in the case of various connecting members alone, allowing the dredging depth to be further deepened.

In addition, the connection member support mechanism includes a member to be fastened to which an intermediate sling side end of the first connection member and the second connection member is fastened, and which can be integrally connected between the first connection member and the second connection member, and one end It is possible to select either a fastening state in which the fastened portion is fastened or a sliding state in which one end is relatively slidably externally fitted to the elongated connecting member, and the other end is connected to the intermediate sling. In this case, a fixing mechanism for supporting the intermediate sling side ends of the first and second connecting members by fixing them to the intermediate sling, and a sliding structure for supporting the long connecting member to be able to slide up and down on the intermediate sling are used as a single connecting member support mechanism. It can be combined with

As a result, the number of parts can be reduced, the cost of parts can be reduced, and maintainability can be improved.

In addition, the jet nozzle is installed inside the inner circumference of the lower end of the ballast tank for the main body, and an inner nozzle that ejects a jet air stream vertically downward of the inlet is installed outside the outer circumference of the lower end of the ballast tank for the main body. In the case of having an outer nozzle that ejects a jet stream vertically downward from the inlet, the jet stream from the inner nozzle blows more water than the ballast tank for the main body while excavating the inner bottom. Since the bottom of the main body ballast tank can also be excavated at the same time as the pressure is applied to the inner bottom, it is possible to reliably prevent the main ballast tank from touching the bottom during dredging work and the lowering of the device main body from stopping at a shallow position.

As a result, the bottom of the device can be effectively excavated while lowering the device body, and further, dredging efficiency can be improved.

In particular, when jet streams from the inner nozzle and outer nozzle are ejected toward a common target area, multiple jet streams can concentrate and significantly increase the excavation force in the target area.

As a result, the excavating force can be concentrated in an appropriate location according to the situation of the water bottom or dredging conditions, and further, dredging efficiency can be improved.

In addition, in order to achieve the above object, the hanging method of the present invention includes a main sling, a main body holding part having a ballast tank for the main body, and an intermediate sling installed between the main sling and the main body holding part and having an intermediate ballast tank. At the same time as this is arranged, a plurality of connecting members between the main body holding part and the intermediate sling and between the main sling and the intermediate sling are installed and maintained in a folded state by a regulating mechanism, and a support movement device is provided through the main sling. A surface floating process of floating the main body holding part to the surface of the water by injection and drainage of the ballast tank for the main body in a state of hanging approximately horizontally by attaching it to the tip of the main body, and separating the regulating mechanism in a storage state and then connecting the main sling and the middle. A connecting member deployment process in which the plurality of connecting members are deployed substantially parallel to each other by raising only the sling or the main sling by a support moving device, and a first connecting member between the main body holding portion and the intermediate sling, wherein the connecting member is deployed; , It is composed of a second connecting member between the main sling and the intermediate sling, and is connected between the first connecting member and the end of the intermediate sling side of the second connecting member to form a long connecting member, and the long connecting member is formed as the intermediate sling. After supporting the main sling so that it can slide up and down, the main sling is lowered with a support moving device and integrated into the middle sling on the water surface, thereby producing the long connecting member to protrude downward from the intermediate sling. A long connecting member production process is provided. I'm doing it.

And a main body holding part having a main sling and a main body ballast tank, and an intermediate sling installed between the main sling and the main body holding part and having an intermediate ballast tank are disposed, and between the main body holding part and the intermediate sling, A suspension device maintained by installing a plurality of connecting members between the main sling and the intermediate sling in a folded state by a regulating mechanism is mounted on the front end of the support movement device through the main sling, and the main body is hung approximately horizontally. A surface floating process of floating the main body holding part to the water surface by filling and draining the ballast tank, and separating the regulating mechanism into a storage state and then raising the main sling and the intermediate sling or only the main sling by a support moving device to By providing a connecting member expansion process in which the connecting members are deployed to be arranged substantially parallel to each other, it is possible to reliably achieve reduction in device cost, miniaturization of the hanging device, and high work efficiency and measurement accuracy.

That is, in the surface floating process, the suspension device is hung approximately horizontally on the tip of the support moving device, and then in the connection member deployment process, the regulating mechanism is separated by manpower to stably separate it in a low-force state, and then supported. A plurality of connecting members can be deployed using a moving device, and large and expensive devices such as a lifting device required to loosen the connecting members become unnecessary.

Moreover, during the deployment, a plurality of connecting members are placed in parallel with each other, so as in the past, the main body near the lower part of the sling is formed by the lower ends of a plurality of connecting members such as a plurality of long crane wires that open radially downward from the tip of the support movement device. Unlike the case of supporting the holder, even when the main body holder held in water is horizontally moved by the support and movement device, horizontal rotational movement or pendulum movement centered on the tip of the support and movement device is difficult to occur, and the main body held by the main body holder is difficult to occur. The posture of the spoon is stable, and positional fluctuations of the working device and measuring device relative to the spoon can be suppressed.

Furthermore, the connecting member is composed of a first connecting member between the main body holding portion and the intermediate sling, and a second connecting member between the main sling and the intermediate sling, and the intermediate sling side of the first connecting member and the second connecting member The ends of the are connected to form a long connecting member, the long connecting member is supported to be able to slide up and down on the intermediate sling, and then the main sling is lowered with a support movement device to approach and integrate the long connecting member with the intermediate sling on the water surface. By providing a long connecting member production process in which the connecting member protrudes downward from the intermediate sling, the hanging depth of the main body holder can be deepened, thereby further deepening the depth of work and measurement.

That is, in the process of producing a long connecting member, a long connecting member that is longer than the first connecting member and the second connecting member is formed, and then produced to protrude downward from the intermediate sling, and a main body holding part can be installed at the extending end.

In addition, after the connecting member deployment process floats the main body holding part to the water surface and reduces the gap between the main body holding part and the intermediate sling, the first regulating mechanism that regulates the gap to a predetermined length is separated in a storage state, By raising the main sling and the intermediate sling with a support moving device while leaving the main body holding portion on the water surface, a plurality of first connections are installed and maintained in a folded state between the main body holding portion and the intermediate sling and are longer than the first regulating mechanism. A first deployment process in which the members are deployed to be arranged almost parallel to each other, and the main body holder is lowered along with the main sling and the intermediate sling with a support moving device while making the main body holder heavier with water from the ballast tank for the main body. , an underwater suspension maintenance process of floating the intermediate sling to the surface of the water through the injection and drainage of the intermediate ballast tank while the main body maintenance part is lowered into the water and maintained suspended, and floating the intermediate sling to the surface of the water to form a main sling and an intermediate sling. After separating the second regulating mechanism that regulates the gap to a predetermined length in a storage state with the gap between them reduced, and then raising the main sling with a support moving device while leaving the intermediate sling on the water, the main sling In the case of having a second deployment process in which a plurality of second connection members that are installed and maintained in a folded state between and the intermediate sling and are longer than the second regulating mechanism are deployed substantially parallel to each other, the first deployment deployment process, the second deployment process, During the deployment process, the first regulating mechanism and the second regulating mechanism can be separated in a storage state, and at the same time, each of the plurality of connecting members is installed in a folded state between the main body holding part and the intermediate sling, and between the main sling and the intermediate sling. With a simple structure to maintain, a plurality of connection members can be arranged almost parallel to each other.

Moreover, even during the underwater suspension maintenance process, the main body maintenance part can be stably maintained underwater simply by using existing devices such as a main body ballast tank and an intermediate ballast tank.

As a result, the connection member deployment process can be performed without installing a new device or complicated configuration, and further, device costs can be reduced and the suspension device can be miniaturized.

In addition, in the case of providing an underwater horizontal movement process of raising the main sling integrated with the intermediate sling with a support movement device after the elongated connecting member production process and moving the main body holder in the horizontal direction while maintaining it by hanging it near the spoon, the main body holder is Various work or measurements can be performed in a stationary state by moving or moving to a separate location, and a wide range of work and measurements can be performed in deep water.

In addition, in order to achieve the above object, the dredging method of the present invention includes a device body having a main sling and a ballast tank for the main body, and an intermediate sling installed between the main sling and the device body and having an intermediate ballast tank. At the same time, a dredging device maintained by installing a plurality of connecting members between the device main body and the intermediate sling and between the main sling and the intermediate sling in a folded state by a regulating mechanism is mounted on the tip of the support movement device through the main sling. A surface floating process of floating the device main body to the surface of the water by filling and draining the ballast tank for the main body while hanging approximately horizontally, and separating the regulating mechanism into a storage state and then only the main sling and the intermediate sling or the main sling. A connecting member deployment process in which the plurality of connecting members are deployed to be substantially parallel to each other by being raised by a support moving device, and the connecting member is connected to a first connecting member between the device main body and the intermediate sling, the main sling and the intermediate sling. It is composed of a second connecting member between slings, and is connected between the first connecting member and the end of the intermediate sling side of the second connecting member to form a long connecting member, and the long connecting member is supported on the intermediate sling so as to be able to slide up and down. After that, the main sling is lowered with a support moving device to approach and integrate with the middle sling on the water surface, thereby producing the long connecting member to protrude downward from the intermediate sling.

And an apparatus main body having a main sling and a ballast tank for the main body, and an intermediate sling installed between the main sling and the apparatus main body and having an intermediate ballast tank are arranged, and between the apparatus main body and the intermediate sling, the main sling A dredging device maintained by installing a plurality of connecting members in a folded state by a regulating mechanism between the main sling and the intermediate sling is mounted on the tip of the support moving device through the main sling and hung approximately horizontally of the ballast tank for the main body. A surface floating process of floating the device main body to the surface of the water by injection and drainage, and separating the regulating mechanism into a storage force state and then raising only the main sling and the intermediate sling or the main sling by a support movement device, so that the plurality of connecting members are By providing a process of expanding the connecting members so that they are deployed substantially parallel to each other, it is possible to reliably achieve reduction in equipment cost, miniaturization of the dredging equipment, and high dredging efficiency.

That is, in the surface floating process, the dredging device is hung approximately horizontally on the tip of the support movement device, and then in the connection member deployment process, the regulation mechanism is separated by manpower to stably separate the regulation mechanism in a storage force state, and then the support movement is performed. A plurality of connecting members can be deployed using the device, and large and expensive devices such as a lifting device required to loosen the connecting members are unnecessary.

Moreover, during the deployment, a plurality of connecting members are placed in parallel with each other, so as in the past, a device located near the lower part of the sling is formed by the lower end of a plurality of connecting members such as a plurality of long crane wires that open radially downward from the tip of the support movement device. Unlike the case of supporting the main body, even when the main body of the device suspended in water is horizontally moved by the support and movement device, horizontal rotational movement or pendulum movement centered on the tip of the support and movement device is unlikely to occur, and the posture of the device main body is stable. It is possible to suppress the variation of the position of the jet nozzle and the inlet of sediment with respect to the bottom of the water.

Moreover, the connecting member is composed of a first connecting member between the device main body and the intermediate sling, and a second connecting member between the main sling and the intermediate sling, and the intermediate sling side of the first connecting member and the second connecting member The ends are connected to form a long connecting member, and the long connecting member is supported on the intermediate sling so as to be able to slide up and down, and then the main sling is lowered with a support moving device to approach and integrate with the intermediate sling on the water surface, thereby forming the long connecting member. By providing a long connecting member production process that causes the member to protrude downward from the intermediate sling, the hanging depth of the device main body can be deepened and the dredging depth can be further deepened.

That is, in the long connecting member production process, a long connecting member that is longer than the first connecting member and the second connecting member is formed, and then produced to protrude downward from the intermediate sling, and the device main body can be installed on the extending end.

In addition, in a state where the connection member deployment process floats the device main body to the surface of the water and reduces the gap between the device main body and the intermediate sling, the first regulating mechanism that regulates the gap to a predetermined length is separated in a storage force state, By raising the main sling and the intermediate sling with a support moving device while leaving the device main body on the water surface, a plurality of first connection members are installed and maintained in a folded state between the device main body and the intermediate sling and are longer than the first regulating mechanism. By lowering the device main body together with the main sling and the intermediate sling by a support movement device while making the device main body heavier with water from a ballast tank for the main body and a first deployment process that is developed to be arranged almost parallel to each other, An underwater suspension maintenance process of floating the intermediate sling to the surface of the water through the injection and discharge of the intermediate ballast tank while the device main body is lowered into the water and maintained suspended, and floating the intermediate sling to the surface of the water to create a space between the main sling and the intermediate sling. After separating the second regulating mechanism that regulates the gap to a predetermined length in a state of reducing the gap in a storage state, the main sling is raised with a support moving device while leaving the intermediate sling on the water, so that the main sling and the middle sling In the case where a plurality of second connection members, which are installed and maintained in a folded state between the slings and are longer than the second regulating mechanism, are deployed in parallel to each other, a first deployment process, a second deployment process, In this case, the first regulating mechanism and the second regulating mechanism can be separated in a storage state, and at the same time, a plurality of each connecting member is installed and maintained in a folded state between the device body and the intermediate sling and between the main sling and the intermediate sling. With this configuration, a plurality of connection members can be arranged in parallel with each other.

Moreover, even during the underwater suspension maintenance process, the main body of the device can be stably suspended and maintained in the water simply by using existing devices such as a ballast tank for the main body and an intermediate ballast tank.

As a result, the connection member deployment process can be performed without installing a new device or complicated configuration, and further, it is possible to reduce device costs and miniaturize the dredging device.

In addition, after the elongated connecting member production process, the main sling integrated with the intermediate sling is raised with a support movement device, and in the case of providing an underwater horizontal movement process of moving the device body in an approximately horizontal direction while maintaining it suspended near the spoon, the device body Dredging work can be done while moving or moving to a separate location and in a stationary state, and dredging can be done extensively in deep water bottoms.

In addition, the device main body is installed on the inside of the lower inner circumference of the main body ballast tank, and an internal nozzle that ejects a jet air stream vertically downward of the inlet is installed on the outside of the lower end outer circumference of the main body ballast tank. In the case of having a jet nozzle including an outer nozzle that ejects a jet stream vertically downward from the inlet, the jet stream from the outer nozzle is applied while excavating the bottom inside the ballast tank for the main body by the jet stream from the inner nozzle. As a result, in addition to the bottom inside the ballast tank for the main body, the bottom vertically below the ballast tank for the main body can be excavated at the same time, ensuring that the ballast tank for the main body does not touch the bottom during dredging work and the lowering of the device main body stops at a shallow position. It can be prevented.

As a result, the bottom of the device can be effectively excavated while lowering the device body, and further, dredging efficiency can be improved.

In particular, when jet streams from the inner nozzle and outer nozzle are ejected toward a common target area, multiple jet streams can concentrate and significantly increase the excavation force in the target area.

As a result, the excavating force can be concentrated in an appropriate location according to the situation of the water bottom or dredging conditions, and further, dredging efficiency can be improved.

The hanging device related to the present invention, the dredging device using the same, the hanging method using the hanging device, and the dredging method using the dredging device are small-scale, low-cost, and have excellent effects on work efficiency and measurement precision.

1 is a side view showing the overall configuration of a dredging device using a hanging device related to the present invention.
Figure 2 is a top view of each sling, Figure 2(a) is a top view of the main sling, and Figure 2(b) is a top view of the middle sling.
Figure 3 is an explanatory diagram of the device main body, Figure 3(a) is a plan view of the device main body, and Figure 3(b) is also a side cross-sectional view.
Figure 4 is a flow chart showing the work procedure of dredging work.
Figure 5 is a schematic diagram showing the work details of the overall dredging operation, Figure 5(a) is a schematic diagram of the surface floating process, Figure 5(b) is a schematic diagram of the first deployment process of the connecting wire deployment process, and Figure 5(c) is a schematic diagram of the first deployment process of the connection wire deployment process. Similarly, Figure 5(d) is a schematic diagram of the underwater suspension maintenance process and is also a schematic diagram of the second deployment process.
Figure 6 is a schematic diagram of a dredging device showing the work details of the latter half of the dredging operation, Figure 6(a) is a schematic diagram of the intermediate stage of the long connecting wire directing process, Figure 6(b) is a schematic diagram of the final stage, and Figure 6 ( c) is a schematic diagram of the underwater horizontal movement process.
Figure 7 is an enlarged side view of the vicinity of the connection wire support mechanism in each work procedure, Figure 7(a) is an enlarged side view during the underwater suspension maintenance process of the connection wire deployment process, and Figure 7(b) is also an enlarged side view during the second deployment process. Figure 7(c) is an enlarged side view of the connection wire support mechanism in a fastened state, Figure 7(c) is an enlarged side view of the connection wire support mechanism in a sliding state during the second deployment process, and Figure 7(d) is an enlarged side view of the long connection wire. This is an enlarged side view of the final stage of the directing process.

Hereinafter, embodiments of the present invention regarding the dredging device (1) using the hanging device (100) related to the present invention will be described with reference to the drawings to aid understanding of the present invention.

1 to 3, the direction indicated by the arrow F is forward, the direction indicated by the arrow T is upward, and the direction indicated by the arrow L is left. The positions and directions of each part described below are as follows. It is based on the front, top, and left directions.

First, the overall structure of the dredging device 1 will be explained with reference to FIGS. 1 to 3.

As shown in FIG. 1, the dredging device 1 includes, in order from the top, a main sling 2 that is mounted on the tip of the arm 5a of the crane 5, which is a support and movement device, and hangs approximately horizontally, and the main sling 2 ), an intermediate sling (3) connected to the lower part of the middle sling (3) by a four-stranded second regulating wire (9), and a device body connected to the lower part of the intermediate sling (3) by a four-stranded first regulating wire (8) It is equipped with (4) and a foldable deployment structure (14), which will be described in detail later.

As shown in Fig. 1 and Fig. 2(a), in the main sling 2, an outer ring portion 15 having a regular octagonal shape in plan view is disposed around the outermost circumference, and the plane of the outer ring portion 15 As seen from , a ring-shaped inner ring portion 17 is supported by eight connecting rib portions 16 at approximately the center.

Among these, the outer ring portion 15 is installed between the upper ring 15a and the lower ring 15b in the shape of a regular octagonal ring installed up and down as if overlapping when viewed in plan, and the upper ring 15a and the lower ring 15b. It has a vertical plate 15c in the shape of a regular octagon, and the vertical plate 15c has a side surface parallel to each side of the upper ring 15a and the lower ring 15b.

In the same way, the inner ring portion 17 is installed between the upper ring 17a and lower ring 17b in the form of a regular octagon ring installed above and below as if overlapping in a plan view, and the upper ring 17a and the lower ring 17b. It has a vertical plate 17c in the shape of a regular octagon, and the vertical plate 17c has a side surface parallel to each side of the upper ring 17a and the lower ring 17b.

And, when viewed from the plane of the upper ring 17a and the lower ring 17b, there is a return hose 39 for conveying sewage and muddy water containing sediment, which will be described later, and a supply hose 43 for supplying high-pressure water, etc., at approximately the center. Penetration holes 17a1 and 17b1 for insertion and penetration are opened.

The connecting rib portion 16 is a rectangular upper plate 6a and a lower plate 16b installed so as to overlap in a plan view, and a rectangular web installed between the upper plate 6a and the lower plate 16b. (16c), the inner end of the web 16c is connected to the vertical plate 17c of the inner ring portion 17, and the outer end of the web 16c is connected to the vertical plate 15c of the outer ring portion 15. is connected to

Accordingly, the outer ring portion 15 and the inner ring portion 17 are integrally connected by the connecting rib portion 16, and since both have an H-shaped cross section, high rigidity can be imparted to the main sling 2. there is.

Furthermore, four plate-shaped suspension retaining stays 18 are protruded outward at 90° intervals in the circumferential direction from each portion in a plan view of the above-described outer ring portion 15, and the upper end of the suspension retaining stays 18 From there, a hook 19 for fastening is installed.

Meanwhile, the crane hook 6 is vertically lowered from the tip of the arm 5a, so that the crane hook 6 can be lifted and lowered, and the upper and lower ends of the crane wire 7 are hung on the crane hook 6 and the fastening hook 19 described above. .

Accordingly, when the dredging device (1) is horizontally moved with the crane (5), the dredging device (1) can be supported by four strands of crane wire (7) installed at intervals of 90° in the circumferential direction, and the dredging device (1) ) is able to secure postural stability.

In addition, as shown in Figs. 1 and 2(b), in the intermediate sling 3 installed between the main sling 2 and the device main body 4, an intermediate sling shaped like a regular octagon ring in plan view is formed around the outermost circumference. A ballast tank 20 is disposed, and a ring-shaped inner ring portion 22 is supported by an 8-strand rod-shaped connecting rib portion 21 at approximately the center of the intermediate ballast tank 20 when viewed from the plane. there is.

Among these, the intermediate ballast tank 20 is formed by connecting eight short pipes 23 having a horizontal axis and having a trapezoidal shape in a plan view to form a regular octagonal ring shape in a plan view, and these short pipes 23 is divided by a partition 23c at each connection part, and is divided into four parts.

In addition, upper inlet ports 23a and lower air outlet ports 23b are alternately drilled in the eight short pipes 23 in the circumferential direction, and at the same time, an adjustment valve (not shown) is provided in the air outlet port 23b of each short pipe 23. It is installed.

Accordingly, when adjusting the floating/flooding of the intermediate sling (3), water flows into the short pipe from the inlet (23a) and the air outlet (23b) perforated in the short pipe (23), while the air outlet ( In a predetermined short pipe where 23b) is installed, the intermediate sling (3) can be levitated or submerged by having the diver adjust the amount of water inflow while adjusting the amount of air discharge.

A through hole 22a for inserting the above-described conveyance hose 39, water supply hose 43, etc. is opened at approximately the center of the inner ring portion 22 when viewed from the plane, and the inner ring portion of the main sling 2 ( The hose etc. that came through 17) is vertically lowered from the through hole 22a toward the device main body 4.

1 and 3, in the device main body 4, a main body ballast tank 24 having a regular hexagonal ring shape in plan view is disposed around the outermost periphery, and the upper outer side of the main body ballast tank 24 A trumpet-shaped hood 25 that opens downward is installed on the periphery, and a suction pump 26 is provided at the apex 25a of the hood 25.

The lower opening 24a of the main body ballast tank 24 is arranged to face the spoon 30, and a plurality of jet nozzles 27 are installed at the lower end of the main body ballast tank 24.

Among these, the main body ballast tank 24, almost like the above-mentioned intermediate ballast tank 20, is formed by connecting 16 short pipes 31 of a trapezoidal shape when viewed from the plane with a horizontal axis to form a regular hexagonal ring when viewed from the plane. It is formed in a shape, and these short pipes 31 are divided by partitions 31c at each connecting portion, so that they are divided into eight pieces.

In addition, an inlet port 31a and an air outlet port 31b are drilled in the upper and lower portions of each short pipe 31, and an adjustment valve (not shown) is installed in a predetermined air outlet port 31b.

Accordingly, when adjusting the floating/flooding of the device main body 4, water flows into the short pipe 31 from the inlet 31a and the air outlet 31b drilled into the short pipe 31 of the main body ballast tank 24. On the other hand, the device main body 4 can be levitated and submerged by allowing the diver to adjust the amount of water inflow while adjusting the amount of air discharge within a predetermined short pipe where the air outlet 31b equipped with an adjustment valve is installed.

From the lower inner surface of the hood portion 25, a plurality of support arms 32 are directed inward and inclined downward, and the upper surface of the ballast tank 24 for the main body described above is supported and fixed to the lower end of the plurality of support arms 32. As much as possible, the hood portion 25 and the ballast tank 24 for the main body are integrated.

Accordingly, the upper surface of the ballast tank 24 for the main body is in close contact with the lower circumference of the hood 25 without any gap, and the liquid tightness inside the hood 25 is improved to prevent sediment from being deposited on the lower part during dredging work. Dredging efficiency can be improved by increasing the suction force when sucking from the opening 24a into the suction port 26a at the bottom of the suction pump 26.

The upper part 26a of the suction pump 26 is fastened and fixed to the middle part of the support frame 33 stretched laterally in the radial direction on the circular ceiling plate 25a1 of the apex 25a described above by a bolt 34. The support frame 33 is stretched between the reinforcement frame 36 and the reinforcement frame 37 installed to extend orthogonally to both ends of the support frame 33 from the lower surface of the ceiling plate 25a1, and then attached to both ends of the ceiling plate 25a1. It is fastened and secured by bolts (35).

A discharge pipe 38 is installed from the lower part of the suction pump 26, and the base end of the return hose 39 is connected to the upper end of the discharge pipe 38, and the tip of the return hose 39 is connected to the upper end of the suction pump 26. is connected in communication with a treatment tank (not shown) installed on the dredging ship or on land through the through hole (22a) in the above-mentioned intermediate sling (3) through the through hole (17a1, 17b1) in the main sling (2).

Furthermore, the above-mentioned suction port 26a is formed at the lower part of the suction pump 26 so as to face the spoon 30, and the suction port 26a is disposed at approximately the center of the lower opening 24a in plan view.

Accordingly, sewage and muddy water containing sediment are sucked into the suction port 26a through the lower opening 24a and then returned from the discharge pipe 38 through the return hose 39 to a treatment device not shown. .

The jet nozzle 27 is formed near the lower end of the ballast tank 24 for the main body so as to surround the suction port 26a of the suction pump 26, and is formed near the lower end of the outer circumference of the suction port 26a. It allows a jet stream to be ejected towards the target.

According to this configuration, the device main body 4 adjusts the floating and flooding of the main body ballast tank 24 installed around the suction port 26a opposite the spoon 30, and at the same time, the main body ballast tank 24 The bottom 30 is excavated and agitated by a jet stream from the jet nozzle 27 installed near the lower end of 24, and sediment can be sucked in from the suction port 26a.

At this time, the jet nozzle 27 is freely set to a stable depth position by approximately horizontal hanging of the main sling 2 and the injection/drainage of the main body ballast tank 24, so that the flow rate of the jet air stream reaching the spoon 30 is set to The strength can be optimized and high dredging efficiency can be secured by accumulating and rising only the sediments in the surface layer of the bottom (30) and leading them to just below the intake port.

Furthermore, the device main body 4 replaces the main body 102, which is composed of dredging-related equipment such as the suction pump 26 and the jet nozzle 27, and is used for work-related equipment such as cable laying, and measurement such as sonar and water temperature gauge. Related devices may be arranged, and the type of the main body 102 is not particularly limited.

And this main body part 102 is installed and maintained in the main body holding part 101 which has the integrated hood part 25, the main body ballast tank 24, etc. as described above.

Accordingly, a suspension device 100 according to the present invention capable of suspending various body parts is formed by simply changing the device body 4 of the dredging device 1 to the body holding portion 101.

In addition, the hanging device 100 can freely set the working device or measuring device at a stable depth position by suspending the main sling 2 approximately horizontally and by injecting and draining the ballast tank 24 for the main body, and It is possible to optimize the distance from the spoon according to the work performed or measurement items.

And since the configuration of the hanging device 100 is almost the same as the above-described dredging device 1 except that the main body 102 is omitted, in this embodiment, the hanging device 100 and the suspension accordingly are used. Detailed description of the method is omitted.

Next, the above-described jet nozzle 27 will be described in detail with reference to FIGS. 1 and 3.

The jet nozzle 27 consists of an inner nozzle 28 installed on the inside of the lower inner circumference of the main body ballast tank 24, and an outer nozzle 29 installed on the outside of the lower outer circumference of the main body ballast tank 24. do.

Among these, the inner nozzle 28 is installed in the inner nozzle pipe 40 formed in a ring shape along the lower inner periphery of the ballast tank 24 for the main body described above.

At the right end of the inner nozzle pipe 40, the lower end of the inner pipe part 41a installed upright in the hood part 25 is connected in communication, and at the same time, the left end of the inner nozzle pipe 40 is connected to the hood part 25. It is supported and fixed to the lower end of a support member 66 installed vertically at the left end of the apex 25a.

And the upper end of the inner pipe portion 41a penetrates the ceiling plate 25a1 of the hood portion 25 and protrudes to the outside.

Meanwhile, the outer nozzle 29 is installed in the outer nozzle pipe 42, which is formed in a regular hexagonal ring shape when viewed from the top along the outer circumference of the lower end of the ballast tank 24 for the main body.

The lower end of the outer pipe part 41b of the water supply pipe 41 described above is connected to the right end of the outer nozzle pipe 42, and the outer pipe part 41b is connected to the hood in the ballast tank 24 for the main body. It extends upward along the outer surface of the portion 25.

And the upper end of the outer pipe part 41b and the upper end of the inner pipe part 41a are connected to the joint part 41c, and a water supply pipe 41 for supplying high-pressure water is formed.

The base end of the above-mentioned water supply hose 43 is connected in communication to the joint portion 41c, and the tip of the water supply hose 43 is connected to the through hole 22a in the intermediate sling 3, similar to the above-described conveyance hose 39. ) is connected to a pressurization pump (not shown) installed on the dredging ship or on land through through holes (17a1, 17b1) in the main sling (2).

Accordingly, high-pressure water is supplied from the water supply hose 43 to the inner nozzle pipe 40 and the outer nozzle pipe 42 through the water supply pipe 41, and then is ejected from the inner nozzle 28 and the outer nozzle 29. It is composed of:

In addition, among these, the inner nozzle 28 protrudes vertically downward toward the suction port 26a at predetermined intervals along the inner circumferential wall of the inner nozzle pipe 40 at a predetermined angle 44.

Similarly, the outer nozzle 29 also protrudes vertically downward toward the suction port 26a at predetermined intervals along the inner circumferential wall of the outer nozzle pipe 42 at a predetermined angle 45 inwardly inclined downward.

Accordingly, the spoon 30 inside the main body ballast tank 24 is excavated by the jet stream 47 ejected from the inner nozzle 28.

At the same time, due to the jet stream 48 ejected from the outer nozzle 29, in addition to the bottom 30 inside the ballast tank 24 for the main body, the bottom 30 vertically below the ballast tank 24 for the main body is also subject to a jet stream. The upstream side of (48) passes through and is excavated.

For this reason, during dredging work, the ballast tank 24 for the main body touches the bottom and the lowering of the device main body 4 does not stop at a shallow position, and the bottom 30 can be effectively excavated while lowering the device main body 4, Dredging efficiency can be further improved.

Furthermore, it is preferable that the jet streams 47 and 48 from the inner nozzle 28 and the outer nozzle 29 are ejected toward a common target area.

For example, if the above-described depression angles 44 and 45 are set to 50° and 30°, respectively, a plurality of jet streams 47 from the inner nozzle 28 and a plurality of jet streams 48 from the outer nozzle 29 ) are concentrated to intersect at a predetermined target area 46 vertically below the suction inlet 26a, and the excavation force vertically below the suction inlet 26a can be significantly increased.

Then, even if the sediment on the spoon 30 is heavy and difficult to rise, the spoon 30 can be vigorously excavated and vigorously stirred.

In this way, the excavating force can be concentrated at an appropriate position according to the situation of the bottom 30 or dredging conditions, and dredging efficiency can be further improved.

Next, the foldable deployment structure 14 described above will be described with reference to FIGS. 1, 5, and 7.

As shown in FIG. 1, the foldable deployment structure 14 includes the above-described first regulation wire 8 detachably installed between the device main body 4 and the intermediate sling 3, the main sling 2 and the intermediate sling 3. The above-mentioned second regulating wire (9) detachably installed between the slings (3), and the first connecting wire (10) installed and maintained in a folded state between the device main body (4) and the intermediate sling (3), , the second connecting wire 11 installed and maintained in a folded state between the main sling 2 and the intermediate sling 3, the first connecting wire 10, and the intermediate sling 3 of the second connecting wire 11. ) The end of the side is fixed to and supported by the intermediate sling (3), the intermediate sling (3), and the device main body (4) by the connection wire support mechanism (49) and the injection and drainage of the ballast tanks (20, 24) described above. It has an injection/drainage structure (50) that allows each to float to the surface of the water (59).

Among these, the first regulation wire (8) is removable from the fastening ring (56) installed on the connection stay (52), the upper end of which is vertically lowered from the lower end of the intermediate ballast tank (20) in the intermediate sling (3). At the same time as being connected, the lower end of the first regulating wire (8) is a fastening ring installed on the connection stay (51) that protrudes outward and obliquely upward from the outer circumferential side of the ballast tank (24) for the main body of the device body (4). It is detachably connected to (55).

Moreover, the first regulating wire 8 is formed shorter than the extended length of the first connecting wire 10, and when mounted between the upper and lower fastening rings 56 and 55, it is connected to the device body 4 and The upper and lower spacing between the intermediate slings 3 can be regulated to a predetermined length.

The second regulation wire 9, like the above-described first regulation wire 8, has its upper end installed in the connection portion 18a at the lower end of the four-strand suspension maintenance stay 18 in the main sling 2. It is detachably connected to the fastening ring 58, and the lower end of the second regulation wire 9 is a connection stay that protrudes outward and obliquely upward from the outer peripheral side of the intermediate ballast tank 20 in the intermediate sling 3. It is detachably connected to the fastening ring 57 installed at (53).

Moreover, the second regulating wire 9 is formed shorter than the deployment length of the second connecting wire 11, and when mounted between the upper and lower fastening rings 58 and the fastening rings 57, it is connected to the main sling 2. The upper and lower spacing between the intermediate slings 3 can be regulated to a predetermined length.

The first connection wire 10 is fastened at its upper end to the ring-shaped fastened member 49a of the connection wire support mechanism 49 connected to the connection stay 53 in the intermediate sling 3, and the second The lower end of the connecting wire 10 is connected to the fastening ring 55 in the device body 4.

Moreover, the first connecting wire 10 is installed and maintained in a folded state between the device main body 4 and the intermediate sling 3 as described above, and after separating the first regulating wire 8, the crane 5 ), when the main sling (2) and the intermediate sling (3) are raised together, a plurality of first connection wires (10) are deployed and arranged in parallel almost parallel to each other.

Like the first connection wire 10, the upper end of the second connection wire 11 is fastened to the fastening ring 58 in the main sling 2, and the lower end of the second connection wire 11 is connected to the connection wire. It is fastened to the fastened member 49a of the support mechanism 49.

Moreover, as described above, the second connecting wire 11 is also installed and maintained in a folded state between the main sling 2 and the intermediate sling 3, and after separating the second regulating wire 9, the crane 5 ), when only the main sling 2 is raised, a plurality of second connection wires 11 are deployed and arranged in parallel almost parallel to each other.

As described above, the connection wire support mechanism 49 has a member 49a to be fastened to the upper end of the first connection wire 10 and the lower end of the second connection wire 11, and the member 49a to be fastened Through this, the first connection wire 10 and the second connection wire 11 are integrally connected to form a long connection wire 54.

Moreover, the connecting wire support mechanism 49 has a selection connecting member 49b capable of selecting the support form of the elongated connecting wire 54, and the elongated connecting wire 54 is connected to an intermediate sling through the selecting connecting member 49b. It is connected to the connection stay (53) in 3).

The selection connection member 49b includes an annular selection ring 49b1 that is detachable from the fastened member 49a, a fastening ring 49b3 installed on the connection stay 53, and these selection rings 49b1. It consists of a main body wire (49b2) connecting between the dragon rings (49b3).

And, as described above, in the fastening state as shown in FIGS. 7(a) and 7(b), where the selection ring 49b1 at the tip of the selection connection member 49b is fastened to the fastened member 49a, the first connection wire 10 ) and the lower end of the second connecting wire 11 are fixed to and supported by the intermediate sling 3 to form a fixed structure.

Meanwhile, the selection ring 49b1 is separated from the fastened member 49a and replaced with the second connection wire 11 of the long connection wire 54, and the selection ring 49b1 slides relative to the long connection wire 54. In a sliding state as shown in FIGS. 7(c) and 7(d), which is possible externally fitted, a sliding structure is formed in which the long connecting wire 54 is supported to slide up and down on the intermediate sling 3.

In this way, the fastening ring 49b3 is connected to the intermediate sling 3 in a state in which the selection connecting member 49b allows selection of either the fastening state or the sliding state described above.

Accordingly, the number of parts can be reduced by combining the fixed structure and the sliding structure with a single connection wire support mechanism 49, thereby reducing the cost of parts and improving maintainability.

Moreover, as described later, when the main sling (2) is lowered with a crane (5) and integrated into the intermediate sling (3), a long connecting wire (longer than the first connecting wire 10 and the second connecting wire 11) is formed. 54) is directed to protrude downward from the intermediate sling (3), and the above-described device body (4) can be installed at the extension end, so that the hanging maintenance depth of the device body (4) is adjusted to each connection wire (10, 11). ), the dredging depth can be further deepened compared to the case where only ) is used.

In addition, in the case of the above-described hanging device 100, the hanging maintenance depth of the main body holding part 101 is made deeper than when only the connection wires 10 and 11 are used, so that the working depth or measurement depth can be further deepened. .

In the injection/drainage structure 50, as shown in Figs. 1 and 5(a), the dredging device 1 suspended from the crane 5 is lowered, and by injection/drainage of the main body ballast tank 24, When the device body (4) is floated above the water surface (59), the vertical gap between the device body (4) and the intermediate sling (3) narrows, and the first regulation wire (8), which was in a long state until then, is It is possible to relax.

Similarly, as shown in Fig. 5(c) and Fig. 7(a), the dredging device 1 is lowered by the crane 5, and the intermediate sling 3 is lowered by filling and draining the intermediate ballast tank 20. When floating on the water surface 59, the vertical gap between the main sling 2 and the intermediate sling 3 narrows, allowing the second regulating wire 9, which was in a long state until then, to relax.

In this way, when attaching and detaching the first regulation wire 8, the device main body 4 is levitated on the water surface 59, and when attaching and detaching the second regulation wire 9, the intermediate sling 3 is levitated on the water surface 59. By doing so, the tension acting on the regulating wires 8 and 9 is reduced and eliminated.

By the foldable deployment structure 14 as described above, a plurality of connection wires 10, 11 are connected to at least one side between the device main body 4 and the intermediate sling 3 and between the main sling 2 and the intermediate sling 3. At the same time as installing and maintaining it in a folded state, when unfolding the connecting wires (10, 11), the regulating wires (8, 9) are separated in a storage state, and the device body (4) is placed on the water using a crane (5). By raising the main sling (2) and the intermediate sling (3) while leaving the intermediate sling (3) on the water surface, or by raising the main sling (2) while leaving the intermediate sling (3) on the water surface, the plurality of connecting wires (10, 11) are almost parallel to each other. It can be installed side by side.

At this time, as described above, in order to separate the regulating wires (8, 9) in a low-force state, the regulating wires (8, 9) are separated by manpower, and then the plurality of connecting wires (10, 11) are connected using a crane (5). can be easily deployed, eliminating the need for large and expensive devices such as hoisting devices required for unwinding the connecting wires 10 and 11.

Moreover, since the plurality of connecting wires 10 and 11 can be arranged almost parallel to each other during the deployment, the lower ends of the connecting members such as the plurality of long crane wires open radially downward from the tip of the crane 5 as in the related art. Unlike the case of supporting the device main body near the lower part of the sling, even when the device main body 4 suspended in water is horizontally moved by the crane 5, there is a horizontal rotational movement centered on the tip of the crane 5 or Pendulum movement is unlikely to occur, the posture of the device main body 4 is stable, and fluctuations in the positions of the nozzles 28, 29 and the sediment inlet 26a with respect to the spoon 30 can be suppressed.

Accordingly, it is possible to reliably achieve reduction in device cost, miniaturization of the dredging device 1, and high dredging efficiency.

In addition, in the case of the above-described hanging device 100, the posture of the main body 102 held by the main body holder 101 is stable, and positional changes of the working device and measuring device with respect to the spoon 30 can be suppressed. Therefore, it is possible to reliably achieve reduction in device cost, miniaturization of the hanging device 100, and high work efficiency and measurement accuracy.

In particular, by simply using existing devices such as the main body ballast tank 24 and the intermediate ballast tank 20, the first regulation wire 8 and the second regulation wire 9 can be separated in a storage state, and a plurality of A simple configuration in which each connection wire (10, 11) is installed and maintained in a folded state between the device body (4) and the intermediate sling (3) and between the main sling (2) and the intermediate sling (3), connecting a plurality of angles. Since the wires 10 and 11 can be arranged almost parallel to each other, a foldable deployment structure can be formed without installing a new device or complicated configuration.

Accordingly, it is possible to further reduce device costs and miniaturize the dredging device 1.

Next, the dredging method using the dredging device 1 described above will be described with reference to FIGS. 1 and 4 to 7.

As shown in FIGS. 1 and 4, in the dredging operation related to the present invention, first, a surface floating process (S1) in which the device main body 4 is floated on the water surface 59 by injection and drainage of the main body ballast tank 24. This is performed, and then a connecting wire deployment process (S2) is performed in which the plurality of connecting wires 10, 11 are expanded so that they are arranged substantially parallel to each other, and further, the long connecting wire 54 is protruded downward from the intermediate sling 3. A long wire directing process (S3) is performed, and finally, when the dredging range is wide, an underwater horizontal movement process (S4) is added as necessary to move the dredging device (1) in an almost horizontal direction.

Among these, in the connection wire deployment process (S2), the first deployment process (S21), the underwater suspension maintenance process (S22), and the second deployment process (S23) are performed in that order.

Among these, in the surface floating process (S1), as shown in FIGS. 1 and 5 (a), the dredging device (1) described above is mounted on the tip of the crane (5) through the main sling (2) and hung almost horizontally. After descending and the device main body 4 reaches the water surface 59, the buoyancy of the device main body 4 is adjusted by the injection/drainage structure 50 using the main body ballast tank 24, and the above-mentioned The device body (4) is allowed to float above the water surface (59).

In addition, in the first first deployment process (S21) in the connection wire deployment process (S2), the depth position of the device main body 4 in the state of FIG. 5(a) is deepened by adjusting the ballast tank 24 for the main body. Alternatively, by lowering the support position of the main sling (2), the vertical gap between the device body (4) and the intermediate sling (3) is reduced, and the first regulating wire (8) is relaxed to create a storage state and separated by manpower. After this, as described above, as shown in FIG. 5(b), the main sling 2 and the intermediate sling 3 are raised together with the crane 5 while leaving the device body 4 on the water surface 59.

Then, the first connecting wires 10, which are installed and maintained in a folded state between the device main body 4 and the intermediate sling 3 and are longer than the first regulating wires 8, are deployed so as to be arranged almost parallel to each other.

In the subsequent underwater suspension maintenance process (S22), as shown in FIG. 5 (c), the main sling (2) is weighted by the main body (4) with the injection water of the ballast tank (24) for the main body, and the crane (5) is used. , the intermediate sling (3) is lowered, and after the intermediate sling (3) reaches the water surface (59), the buoyancy of the intermediate sling (3) is increased by the injection/drainage structure (50) by the intermediate ballast tank (20). is adjusted, and the intermediate sling (3) floats above the water surface (59) while the device body (4) is lowered into the water and maintained suspended therein.

And at this time, as shown in FIG. 7(a), the connection wire support mechanism 49 connected to the connection stay 53 of the intermediate sling 3 with a fastening ring 49b3 is centered around the fastening ring 49b3. It rotates downward from position 60 to position 61 so that the weight of the device body 4 in the water is supported by the first connecting wire 10.

Subsequently, in the second deployment process (S23), the depth position of the intermediate sling 3 in the state of FIGS. 5(c) and 7(a) is made shallow by adjusting the intermediate ballast tank 20 or the main sling ( By lowering the support position of 2), the vertical gap between the main sling (2) and the intermediate sling (3) is reduced, the second regulating wire (9) is relaxed, placed in a storage state, and separated by manpower, as described above. As shown in Fig. 5(d), the main sling 2 is raised by the crane 5 while leaving the device body 4 in the water and the intermediate sling 3 on the water.

Then, a plurality of second connection wires 11, which are installed and maintained in a folded state between the main sling 2 and the intermediate sling 3 and are longer than the second regulating wire 9, are deployed so as to be arranged almost parallel to each other.

And the long connection wire 54 described above is formed together with the already deployed first connection wire 10.

As described above, in the surface floating process (S1), the dredging device is hung approximately horizontally on the tip of the support moving device, and then in the connecting wire deployment process (S2), the regulating wires 8 and 9 are stably separated in a storage force state. Therefore, as explained in the foldable deployment structure 14 described above, the plurality of connecting wires 10 and 11 can be easily deployed using the crane 5 after separating the regulating wires 8 and 9 by manpower. This eliminates the need for large and expensive devices such as lifting devices required to unwind the connecting wires 10 and 11.

In addition, since the plurality of connecting wires 10 and 11 can be arranged substantially parallel to each other during the above-mentioned deployment, the lower ends of the connecting members such as the plurality of long crane wires that open radially downward from the tip of the crane 5 as in the past Unlike the case where the device main body near the lower part of the sling is supported by Rotational movement or pendulum movement is unlikely to occur, and the posture of the device main body 4 is stable, so that positional fluctuations of the nozzles 28 and 29 and the sediment inlet 26a with respect to the spoon 30 can be suppressed.

Accordingly, it is possible to reliably achieve reduction in device cost, miniaturization of the dredging device 1, and high dredging efficiency.

In addition, in the case of the above-described hanging device 100, the posture of the main body 102 held by the main body holder 101 is stable, so that positional changes of the working device or measuring device with respect to the spoon 30 can be suppressed. , it is possible to reliably achieve reduction in device cost, miniaturization of the hanging device 100, and high work efficiency and measurement accuracy.

In particular, in the first deployment process (S21) and the second deployment process (S23) of the connection wire deployment process (S2), simply using existing devices such as the main body ballast tank 24 and the intermediate ballast tank 20 The first regulation wire (8) and the second regulation wire (9) can be separated in a storage state, and at the same time, a plurality of each connecting wire (10, 11) is connected between the device main body (4) and the intermediate sling (3), With a simple configuration of installing and maintaining the main sling (2) and the intermediate sling (3) in a folded state, a plurality of connection members can be installed almost parallel to each other.

Moreover, in the underwater suspension maintenance process (S22), the device main body 4 can be stably suspended and maintained in the water simply by using existing devices such as the main body ballast tank 24 and the intermediate ballast tank 20.

Accordingly, the connecting wire deployment process (S2) can be performed without installing a new device or complicated configuration, which can further reduce device costs and miniaturize the dredging device.

In addition, in the case of the above-described hanging device 100, the main body holding portion 101 can be stably suspended and maintained in water, so the connection wire deployment process (S2) can be performed without installing a new device or complicated configuration. It is possible to further reduce device costs and miniaturize the hanging device 100.

Additionally, the long connection wire directing process (S3) is performed as follows.

After the above-described second deployment process (S23), the connecting wire support mechanism 49 in the state of FIGS. 5(d) and 7(b) is included in the long connecting wire 54 pulled up by the crane 5. It is maintained in a relaxed state by rotating upward from the position 61 to the position 62 around the fastening ring 49b3 on the proximal end side by the fastened member 49a.

Therefore, in the relaxed state, after separating the selection ring 49b1 on the distal end side of the connecting wire support mechanism 49 from the fastened member 49a, as shown in FIG. 7(c), the long By replacing the connecting wire 54 with the second connecting wire 11, the selection ring 49b1 is externally and slidably fitted to the elongated connecting wire 54, and the elongated connecting wire 54 is connected to the intermediate sling 3. It can be supported to slide up and down.

Thereafter, as shown in FIG. 6(a), a marker 63 such as a float for determining the depth position of the long connecting wire 54 is mounted on the fastened member 49a, and then the intermediate sling 3 is installed. The main sling (2) is lowered by the crane (5) while remaining on the water surface (59).

Then, as shown in FIGS. 6(b) and 7(d), the main sling (2) approaches the intermediate sling (3) and vertically descends from the outer peripheral surface of the lower ring (15b) of the main sling (2). The connection hole 64a of the stay 64 and the connection hole 53a of the connection stay 53 through which the lower end of the second regulation wire 9 was inserted in the intermediate sling 3 are overlapped to form these connection holes ( By inserting the connecting pin 65 into 53a, 64a) and integrating the main sling (2) close to the intermediate sling (3), the long connecting wire (54) is directed to protrude downward from the intermediate sling (3). .

Accordingly, in the long connecting wire directing process (S3), after forming the long connecting wire 54 that is longer than the first connecting wire 10 and the second connecting wire 11, it protrudes downward from the intermediate sling 3. The dredging depth can be further deepened by deepening the suspension maintenance depth of the device main body 4 by installing the device main body 4 on the stage.

In addition, in the case of the above-mentioned hanging device 100, the main body holding part 101 can be installed at the extending end of the long connecting wire 54, so that the hanging maintenance depth of the main body holding part 101 is deepened to increase the depth of work and The measurement depth can be further deepened.

In addition, in the underwater horizontal movement process (S4), as shown in FIG. 6 (c), the main sling (2), which is integrated close to the intermediate sling (3), is raised by the crane (5) to lift the device body (4). The ship loaded with the crane 5 is moved in an almost horizontal direction while being suspended in a slightly floating state at (30).

And the dredging device 1 after the dredging work can be recovered on board by performing the work procedure of the dredging work described above in the reverse order.

Accordingly, dredging work can be performed in a stationary state while moving the device main body 4 or by moving it to a separate location, making it possible to dredge a wide range of deep water bottoms.

In addition, in the case of the above-mentioned hanging device 100, various works or measurements can be performed while moving the main body holding part 101 or in a stationary state by moving it to a separate location, so that a wide range of works or measurements can be performed in a deep spoon. It becomes possible.

As described above, the hanging device to which the present invention is applied, the dredging device using the same, the hanging method using the hanging device, and the dredging method using the dredging device are small-scale and low-cost, and are excellent in work efficiency and measurement precision.

1 dredging device
2 main sling
3 middle sling
4 device body
5 Crane (supported mobile device)
8 First regulatory wire (first regulatory body)
9 2nd regulatory wire (2nd regulatory body)
10 First connection wire (first connection member)
11 Second connection wire (second connection member)
14 foldable deployment structure
20 Intermediate ballast tank
24 Ballast tank for main body
26a intake
27 jet nozzle
28 Inner nozzle
29 Outer nozzle
30 spoon
49 Connection wire support mechanism (connection member support mechanism)
49a Member to be fastened
49b1 Select ring (select connection member)
50 Injection/drainage structure
54 long connector
59 sleep
100 hanging device
101 Main body maintenance part
102 main body
S1 water surface flotation process
S2 connection wire deployment process (connection member deployment process)
S3 long connection wire production process (long connection member production process)
S4 underwater horizontal movement process
S21 First deployment process
S22 Underwater Suspension Maintenance Course
S23 Second deployment process

Claims (16)

A main sling mounted on the front end of the support moving device and hanging horizontally;
A main body maintenance part that maintains the main body part that is the object of suspension and is capable of adjusting flotation and flooding through the injection and drainage of the ballast tank for the main body;
An intermediate sling installed between the main sling and the main body holding part and capable of adjusting floating and flooding through the injection and drainage of the intermediate ballast tank; and
A plurality of connecting members are installed and maintained in a folded state by a regulating mechanism on at least one side between the main body holding portion and the intermediate sling and between the main sling and the intermediate sling, and at the same time, when the connecting members are deployed, the regulating mechanism is provided with a storage force. By separating the main sling and the intermediate sling using the support movement device and leaving the main body holding part on the water surface, or by raising the main sling while leaving the intermediate sling on the water surface, the plurality of connecting members Characterized by having a foldable deployment structure that can be placed parallel to each other
Suspension device. According to paragraph 1,
The foldable deployment structure is,
a first regulating mechanism that is detachably installed between the main body holding part and the intermediate sling and regulates the gap between the main body holding part and the intermediate sling to a predetermined length when installed;
A plurality of first slings are installed and maintained in a folded state between the main body holder and the intermediate sling, and when deployed, are longer than the first regulating mechanism due to the elevation of the main sling and the intermediate sling by the support movement device and are parallel to each other. lack of connection;
a second regulating mechanism that is detachably installed between the main sling and the intermediate sling and regulates the gap between the main sling and the intermediate sling to a predetermined length when installed;
A second connection member is installed and maintained in a folded state between the main sling and the intermediate sling, and when deployed, is longer than the second regulating mechanism due to the elevation of the main sling by the support movement device and is parallel to each other;
a connecting member support mechanism including a fixing structure for supporting ends of the first connecting member and the second connecting member on the intermediate sling side by fixing them to the intermediate sling; and
When attaching and detaching the first regulation mechanism, the main body holding part is floated to the surface by the injection and drainage of the ballast tank for the main body, and when attaching and detaching the second regulation mechanism, the intermediate sling is brought to the surface by the injection and drainage of the intermediate ballast tank. Having an injection/drainage structure capable of reducing the tension acting on the first regulating mechanism and the second regulating mechanism by floating the angular gap between the main body holding portion and the intermediate sling and between the main sling and the intermediate sling. characterized by
Suspension device. According to paragraph 2,
The connecting member support mechanism is,
An elongated connecting member is formed by integrally connecting the ends of the first connecting member and the intermediate sling side of the second connecting member, and includes a sliding structure that supports the elongated connecting member to be able to slide up and down on the intermediate sling. to do
Suspension device. According to paragraph 3,
The connecting member support mechanism is,
a member to be fastened to which ends of the intermediate sling sides of the first and second connecting members are fastened and capable of integrally connecting the first and second connecting members; and
It is possible to select either a fastening state in which one end is fastened to the fastened member, a sliding state in which one end is relatively slidably externally fitted to the elongated connecting member, and the other end includes a selection connection part connected to the intermediate sling. characterized by
Suspension device. A main sling mounted on the front end of the support moving device and hanging horizontally;
Floating and flooding are adjusted by the injection/drainage of the main body ballast tank installed at the inlet opposite to the main body ballast tank, and the spoon is excavated and agitated by a jet air stream from a jet nozzle installed near the lower end of the main body ballast tank to remove sediment. A device body that suctions air from the suction port;
An intermediate sling installed between the main sling and the device body and capable of adjusting floating and flooding through the injection and drainage of the intermediate ballast tank; and
A plurality of connecting members are installed and maintained in a folded state by a regulating mechanism on at least one side between the device main body and the intermediate sling and between the main sling and the intermediate sling, and at the same time, when the connecting members are deployed, the regulating mechanism is maintained in a storage state. separate and raise the main sling and the intermediate sling while leaving the device body on the water surface using the support moving device, or raise the main sling while leaving the intermediate sling on the water surface to make the plurality of connecting members parallel to each other. Characterized by having a foldable deployment structure that can be installed side by side
dredging device. According to clause 5,
The foldable deployment structure is,
a first regulating mechanism that is detachably installed between the device main body and the intermediate sling and regulates the gap between the device main body and the intermediate sling to a predetermined length when installed;
It is installed and maintained in a folded state between the device main body and the intermediate sling, and when deployed, the main sling and the intermediate sling are raised by the support movement device, and a plurality of slings are longer than the first regulating mechanism and are parallel to each other. 1No connection;
a second regulating mechanism that is detachably installed between the main sling and the intermediate sling and regulates the gap between the main sling and the intermediate sling to a predetermined length when installed;
A second connection member is installed and maintained in a folded state between the main sling and the intermediate sling, and when deployed, is longer than the second regulating mechanism due to the elevation of the main sling by the support movement device and is parallel to each other;
a connecting member support mechanism including a fixing structure for supporting the intermediate sling side ends of the first connecting member and the second connecting member by fixing them to the intermediate sling;
When attaching and detaching the first regulation mechanism, the device main body is floated to the surface of the water by injection and drainage of the ballast tank for the main body, and when attaching and detaching the second regulation mechanism, the intermediate sling is floated to the surface by injection and drainage of the intermediate ballast tank. It is characterized by having an injection/drainage structure that can reduce the tension acting on the first regulating mechanism and the second regulating mechanism by reducing the respective intervals between the device main body and the intermediate sling, and between the main sling and the intermediate sling. to do
dredging device. According to clause 6,
The connecting member support mechanism is,
An elongated connecting member is formed by integrally connecting the ends of the first connecting member and the intermediate sling side of the second connecting member, and includes a sliding structure that supports the elongated connecting member to be able to slide up and down on the intermediate sling. to do
dredging device. In clause 7,
The connecting member support mechanism is,
a member to be fastened to which an intermediate sling side end of the first connection member and the second connection member is fastened, and capable of integrally connecting the first connection member and the second connection member; and
It is possible to select either a fastening state in which one end is fastened to the fastened member, a sliding state in which one end is relatively slidably externally fitted to the elongated connecting member, and the other end is connected to the intermediate sling. Characterized by including
dredging device. According to any one of claims 5 to 8,
The jet nozzle is,
an inner nozzle that is installed inside the lower inner circumference of the ballast tank for the main body and ejects a jet air stream vertically downward of the inlet; and
An outer nozzle is installed on the outside of the lower periphery of the ballast tank for the main body and ejects a jet stream vertically downward of the inlet.
dredging device. main sling;
A main body holding part having a ballast tank for the main body; and
At the same time, an intermediate sling is installed between the main sling and the main body holding portion and has an intermediate ballast tank,
A suspension device maintained by installing a plurality of connecting members between the main body holding part and the intermediate sling and between the main sling and the intermediate sling in a folded state by a regulating mechanism is mounted on the front end of the support movement device through the main sling. A water surface floating process of floating the main body holding part to the water surface by filling and draining the ballast tank for the main body in a horizontally suspended state;
A connecting member deployment process in which the plurality of connecting members are deployed parallel to each other by separating the regulating mechanism into a low-force state and then raising only the main sling and the intermediate sling or the main sling by a support moving device;
The connecting member consists of a first connecting member between the main body holding portion and the intermediate sling, and a second connecting member between the main sling and the intermediate sling, and the intermediate sling side of the first connecting member and the second connecting member The ends are connected to form a long connecting member, and the long connecting member is supported on the intermediate sling so as to be able to slide up and down, and then the main sling is lowered with a support moving device to approach and integrate with the intermediate sling on the water surface, thereby forming the long connecting member. Characterized by providing a long connecting member production process to direct the member to protrude downward from the intermediate sling.
How to hang. According to clause 10,
The connection member deployment process is,
The main body holding part is floated to the surface of the water to reduce the gap between the main body holding part and the intermediate sling, and the first regulating mechanism that regulates the gap to a predetermined length is separated in a storage state, and then the main body holding part is left on the water surface. By raising the main sling and the intermediate sling with a support moving device, a plurality of first connection members, which are installed and maintained in a folded state between the main body holding portion and the intermediate sling and are longer than the first regulating mechanism, are arranged parallel to each other. The first development process is developed to do so;
By lowering the main body holding part together with the main sling and the intermediate sling with a support moving device while making the main body holding part heavier with water from the ballast tank for the main body, the main body holding part is lowered into the water and suspended in the intermediate ballast. The underwater suspension maintenance process that floats the intermediate sling to the surface of the water through the tank's filling and draining; and
After floating the intermediate sling to the surface of the water and reducing the gap between the main sling and the intermediate sling, the second regulation mechanism that regulates the gap to a predetermined length is separated in a storage state, and then the intermediate sling is left on the water surface. By raising the main sling with a support moving device, a plurality of second connection members, which are installed and maintained in a folded state between the main sling and the intermediate sling and are longer than the second regulating mechanism, are deployed so that they are parallel to each other. characterized by having a process
How to hang. According to claim 10 or 11,
After the elongated connecting member production process,
Characterized by an underwater horizontal movement process of raising the main sling integrated with the intermediate sling with a support movement device and moving the main sling in the horizontal direction while maintaining it by hanging it near the spoon.
How to hang. main sling;
A device main body having a ballast tank for the main body and an inlet disposed so as to face the spoon at the center of the circumference formed by the ballast tank for the main body; and
At the same time, an intermediate sling is installed between the main sling and the device main body and has an intermediate ballast tank,
A dredging device maintained by installing a plurality of connection members between the device body and the intermediate sling and between the main sling and the intermediate sling in a folded state by a regulating mechanism is mounted on the front end of the support moving device through the main sling and horizontally A water surface floating process in which the device main body floats to the water surface in a suspended state by filling and draining a ballast tank for the main body;
A connecting member deployment process in which the plurality of connecting members are deployed parallel to each other by separating the regulating mechanism into a low-force state and then raising only the main sling and the intermediate sling or the main sling by a support moving device; and
The connecting member consists of a first connecting member between the device main body and the intermediate sling and a second connecting member between the main sling and the intermediate sling, and an end portion of the first connecting member and the second connecting member on the intermediate sling side. The long connecting member is supported on the intermediate sling so as to be able to slide up and down, and then the main sling is lowered with a support moving device to approach and integrate with the intermediate sling on the water surface, thereby forming the long connecting member. Characterized by providing a process of producing a long connecting member to project downward from the intermediate sling.
Dredging method. According to clause 13,
The connection member deployment process is,
The device main body is floated to the surface of the water, the gap between the device main body and the intermediate sling is reduced, the first regulating mechanism that regulates the gap to a predetermined length is separated in a storage state, and the device main body is left on the water surface. By raising the main sling and the intermediate sling with a support moving device, a plurality of first connection members, which are installed and maintained in a folded state between the device main body and the intermediate sling and are longer than the first regulating mechanism, are deployed so as to be parallel to each other. The first development process that becomes;
By lowering the device main body together with the main sling and the intermediate sling with a support moving device while making the device main body heavy with water from the ballast tank for the main body, the device main body is lowered into the water and maintained suspended in the middle. An underwater suspension maintenance process that floats the intermediate sling to the surface of the water by filling and draining the ballast tank; and
After floating the intermediate sling to the surface of the water and reducing the gap between the main sling and the intermediate sling, the second regulation mechanism that regulates the gap to a predetermined length is separated in a storage state, and then the intermediate sling is left on the water surface. By raising the main sling with a support moving device, a plurality of second connection members, which are installed and maintained in a folded state between the main sling and the intermediate sling and are longer than the second regulating mechanism, are deployed so that they are parallel to each other. characterized by having a process
Dredging method. According to claim 13 or 14,
After the elongated connecting member production process,
Characterized by an underwater horizontal movement process of raising the main sling integrated with the intermediate sling with a support movement device and moving the device body in the horizontal direction while maintaining it suspended near the spoon.
Dredging method. According to clause 13,
The device body is,
an inner nozzle that is installed inside the lower inner circumference of the ballast tank for the main body and ejects a jet air stream vertically downward of the inlet; and a jet nozzle including an outer nozzle that is installed outside the lower periphery of the ballast tank for the main body and ejects a jet air stream vertically downward of the inlet.
Dredging method.

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