JP6873728B2 - Opening closure device - Google Patents

Description

The present invention relates to an opening closing device and an opening closing method for closing an opening opened in a pressure air space portion maintained at a pressure state higher than atmospheric pressure by a lid member.

As an example of the above-mentioned pressure space portion, there is a work room in the pneumatic caisson method known as a method for constructing an underground structure such as a bridge, a foundation of a building, or a shaft for starting a shield tunnel. In the pneumatic caisson method, an airtight work room is provided at the bottom of a reinforced concrete box (caisson) constructed on the ground, and the caisson is underground while excavating the ground on the floor of the work room and discharging the earth and sand to the outside. Underground structures such as bridges will be constructed by submerging them. In order to prevent the intrusion of groundwater, compressed air corresponding to the groundwater pressure is sent into the work chamber, so that the work chamber is maintained in a pressure state higher than the atmospheric pressure (for example, Patent Document 1). reference).

The ceiling of the work room is provided with an opening for carrying work machines and the like into the work room and for carrying them out from the work room to the ground, and an opening for workers to enter and exit the work room. .. In the pneumatic caisson method, after the construction work of the underground structure is completed, concrete (hereinafter referred to as "filled concrete") is placed in the work room in order to fill the space that was configured as the work room. Work is being carried out to close the opening when placing the buried concrete. Conventionally, a lid member for closing an opening is suspended from the ground in a divided state and carried into the work room, then the carried-in lid member is assembled, and the assembled lid member is pressed against the opening from the work room side. A method of closing the lid is known (see, for example, Patent Document 2).

JP-A-2015-108244 Japanese Unexamined Patent Publication No. 2008-57267

In the work of closing the opening using the lid member, it is common that a worker enters the work room maintained in a high atmospheric pressure state and a part of the work process is manually performed. Due to the risk of anticyclone disorders (decompression sickness), the amount of time workers can stay in the work room is limited. Therefore, it is required that the work of closing the opening of the work room with the lid member can be performed without an operator entering the work room.

The present invention has been made in view of such a problem, and provides an opening closing device and an opening closing method capable of closing an opening by a lid member without an operator entering the pressurized space. The purpose is to do.

In order to achieve the above object, the opening closing device according to the present invention has an opening (for example, for example, an opening (for example, a working room 2 in the embodiment) that is maintained in a pressure state higher than the atmospheric pressure. A device for closing the material shaft opening H1 and the man shaft opening H2 in the embodiment by covering the material shaft opening H1 and the man shaft opening H2 from below with a lid member (for example, the pressure air lid 60 in the embodiment), and the lid member is folded. A folding lid carrying means (for example, a carrier device 32 in the embodiment) that is configured to be deployable, suspends the lid member in a folded state, moves the lid member downward, and carries the lid member into the pressure air space portion through the opening. ), A lid deploying means (for example, the pressure air lid deploying device 100 in the embodiment) that is attached to the lid member and deploys the lid member in a folded state, and the lid deploying means in the compressed air space portion. The lid member is provided on the deployable lid moving means (for example, the carrier device 32 and the transport lifting device 120 in the embodiment) and the lid deploying means for moving the lid member to a position where the lid member covers the opening from below. held in the folding lid carrying means together is, the cover deployment device and the lid member and the coupling-detachably connected to connecting means (eg, coupling device 110 in the embodiment) is constituted by a, the connecting The means has an operating member that can move forward and backward between an operating position and a non-operating position, and a driving unit that drives the operating member between the operating position and the non-operating position. The lid member and the lid deploying means are coupled by moving the member forward to the operating position by the driving unit, and the operating member retracts and moves to the non-operating position by the driving unit to move the lid member to the lid member. It is configured to be separated from the lid deploying means .

In the above-mentioned opening closing device, the posture of the lid member attached to the lid member and suspended in a folded state by the folding lid carrying-in means, the lid member passes through the opening and enters the pressure space portion. It is preferable to provide a lid posture changing means (for example, the pressure-air lid posture changing device 90 in the embodiment) for changing the posture when the lid member is carried into the lid to a posture in which the lid member can be horizontally deployed.

In the aperture closure device, said lid developing means and said lid position changing means by said connection means, said coupled-detachably connected to the lid member, be constituted as to be held by the folding lid carrying means preferable.

In the opening closing device, the communication means for receiving the radio signal for driving the lid deploying means and the lid posture changing means (for example, the power / communication device 80 in the embodiment) and the communication means have received the communication means. It is preferable to include the lid deploying means and the driving means (for example, the electric motor in the embodiment) for driving the lid posture changing means based on the radio signal.

In the above-mentioned opening closing device, the deploying lid moving means lowers the opening in a state where the lid member is deployed even when the lid deploying means is separated from the lid member by the connecting means. It is preferable that the structure is such that it can be held at a position covering from the side.

According to the opening closing device according to the present invention, a folding lid carrying-in means for suspending the lid member in a folded state and moving the lid member downward to carry the lid member into the pressure air space portion from the opening, and a lid in the folded state. Since it is configured to include a lid deploying means for deploying the member and a deploying lid moving means for moving the lid member deployed by the lid deploying means to a position where the lid member covers the opening from the lower side, the lid member is folded. It is possible to perform the work of deploying the lid member carried into the pressure air space portion in the state and closing the opening without an operator entering the pressure air space portion.

In the opening closing device according to the present invention, the posture of the lid member suspended in a folded state by the folding lid carrying-in means is changed from the posture when the lid member is carried into the pressure air space through the opening. If the configuration is provided with a lid posture changing means for changing the posture so that the member can be horizontally deployed (hereinafter, also referred to as "horizontal deployment posture"), the posture of the lid member carried into the pressure air space portion is used for horizontal deployment. Since the lid member can be unfolded after changing to the posture, it is possible to safely and efficiently perform the unfolding work of the folded lid member.

In the opening closing device according to the present invention, if the lid deploying means and the lid posture changing means are coupled and separably connected to the lid member and held by the folding lid carrying-in means, the lid member is placed in the pressure space portion. The lid deploying means and the lid posture changing means can be separated from the lid member, and the separated lid deploying means and the lid posture changing means can be collected and reused by the folding lid loading means.

In the opening closing device according to the present invention, the communication means for receiving the radio signal for driving the lid deploying means and the lid posture changing means, and the lid deploying means and the lid posture changing means based on the radio signal received by the communication means. If the configuration is provided with the driving means for driving the lid, the lid deploying means and the lid posture changing means can be remotely operated via the communication means and the driving means.

According to the opening closing method according to the present invention, there is a folding lid loading step in which the lid member is hung in a folded state and moved downward, and the lid member is carried into the pressure air space portion from the opening, and in the folded state. A lid deployment step for deploying a lid member suspended and carried into the pressure air space portion, and a deployment lid movement step for moving the lid member deployed in the pressure air space portion to a position where the lid member covers the opening from the lower side. Since the lid member carried into the pressure air space portion is expanded and the opening is closed, it is possible to perform the work without an operator entering the pressure air space portion.

It is a vertical cross-sectional view which shows the main equipment of the pneumatic caisson method. It is a perspective view which shows the whole structure of the pressure air lid deployment unit of the opening closing device which concerns on this invention. It is a perspective view which shows the folding / unfolding state of the pressure air lid having a structure similar to that of the pressure air lid shown in FIG. It is a perspective view which shows the state at the time of carrying in a pressure air lid. It is a perspective view which shows the state at the time of changing the hanging posture of a pressure air lid. It is a perspective view which shows the state at the time of deployment of a pressure air lid. It is a perspective view which shows the state which separated the pressure air lid deployment unit from the pressure air lid. It is a perspective view which shows the whole structure of the coupling device of a pressure air lid deployment unit. It is sectional drawing which shows the state at the time of coupling of a coupling device. It is sectional drawing which shows the state at the time of separation of a coupling device. It is a schematic diagram which shows the state which carries in the pressure air lid through the opening for a material shaft. It is a schematic diagram which shows the state which changed the hanging posture of a pressure air lid. It is a schematic diagram which shows the state which expanded the pressure air lid. It is a schematic diagram which shows the state which the opening for a material shaft is closed by a pressure air lid. It is a schematic diagram which shows the state which separated the pressure air lid deployment unit from the pressure air lid. It is a schematic diagram which shows the state in which the pressure air lid is held by the transport lifting device. It is a schematic diagram which shows the state which separated the pressure air lid deployment unit from the pressure air lid held by the transport lifting device. It is a schematic diagram which shows the state which carried out the pressure air lid below the opening for a man shaft by a transport lifting device. It is a schematic diagram which shows the state which the pressure air lid is lifted by the transport lifting device, and the opening for a man shaft is closed. It is a perspective view which shows the folding / unfolding state of another pressure air lid.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the main equipment of the pneumatic caisson method in which the pressure air lid is installed by using the opening closing device according to the present invention will be described with reference to FIG. The pneumatic caisson method uses excavation equipment E1 and equipment equipment E2.
The underground structure is constructed by submerging the reinforced concrete caisson 1 into the ground by using the soil removal equipment E3, the air supply equipment E4, and the reserve / safety equipment E5.

The excavation equipment E1 is excavated by an excavator 100 (corresponding to a work machine, hereinafter referred to as a caisson excavator 100) installed in a work room 2 provided at the bottom of the caisson 1 and a caisson excavator 100. It is configured to include an automatic earth and sand loading device 11 for loading the earth and sand into a cylindrical earth bucket 31, and a ground remote control room 13 including a remote operation device 12 for remotely controlling the operation of the caisson excavator 100 from the ground. .. The excavation equipment E1 operates by receiving electric power from a power generation device (not shown). The electric power from this power generation device is also supplied to the equipment equipment E2, the soil removal equipment E3, and the air supply equipment E4.

The mounting equipment E2 has a cylindrical man shaft 21 that connects the ground and the work room 2 so that the worker can enter and exit the work room 2, and the man shaft 21 is provided to work while suppressing a decrease in air pressure in the work room 2. A cylindrical shape that connects the ground and the work room 2 in order to carry the man lock 22 (airlock) that allows a person to pass inside and outside the work room 2 and the earth bucket 31 loaded with earth and sand by the automatic earth and sand loading device 11 to the ground. The material shaft 23 and the material lock 24 (airlock) provided on the material shaft 23 and passed through the inside and outside of the earth bucket 31 work room 2 while suppressing the decrease in air pressure in the work room 2 are provided. A spiral staircase 25 is provided in the man shaft 21, and the operator can move back and forth between the ground and the work room 2 by using the spiral staircase 25. The man lock 22 and the material lock 24 each have a double door structure, and are configured so that the operator and the earth bucket 31 can enter and exit the work room 2 while suppressing the change in the air pressure in the work room 2. Has been done.

The soil removal equipment E3 includes an earth bucket 31 on which the earth and sand excavated by the caisson excavator 100 is loaded, a carrier device 32 for pulling the earth bucket 31 up to the ground via a material shaft 23, and the earth bucket 31 and a carrier. It is configured to have an earth and sand hopper 33 for temporarily storing the earth and sand carried to the ground by the device 32.

The air supply equipment E4 includes an air compressor 42 that sends compressed air into the work room 2 via an air supply passage 3 formed in the air supply pipe 41 and the caisson 1, and air that purifies the compressed air sent by the air compressor 42. A cleaning device 43, an air supply pressure adjusting device 44 that adjusts the amount (pressure) of compressed air sent from the air compressor 42 into the working room 2 so that the pressure in the working room 2 is substantially equal to the ground water pressure, and a man. It is configured to have an automatic decompression device 45 for depressurizing the air pressure in the lock 22. In order to circulate the air in the work room, the air in the work room is appropriately discharged to the ground through the exhaust passage 4.

The spare / safety equipment E5 includes an emergency air compressor 51 capable of sending compressed air into the work room 2 instead of the air compressor 42 in the event of a failure or inspection of the air compressor 42, and the above power generator. Instead, an emergency generator (not shown) capable of supplying power to the excavation equipment E1, the equipment equipment E2, the soil removal equipment E3, and the air supply equipment E4, and the worker who worked in the work room 2. It is configured to have a hospital lock 53 (compressor) for gradually acclimatizing the worker's body to atmospheric pressure.

Next, the opening closing device according to the embodiment of the present invention will be described with reference to FIGS. 2 to 10. The opening closing device of the present embodiment closes the opening provided on the ceiling surface 5 of the working room 2 when the filling concrete is placed in the working room 2, and the filling concrete is placed. It is installed for the purpose of preventing leakage of ready-mixed concrete at the time of installation and prevention of leakage of groundwater after placing filled concrete. As shown in FIG. 2, this opening closing device suspends the pressure air lid 60, the pressure air lid deployment unit 70, and the pressure air lid 60 which are configured to be foldable and deployable via the pressure air lid deployment unit 70. It is configured to include a carrier device 32 (see FIG. 1) that is carried into the work room 2.

The pressure air lid 60 is composed of a pair of lid constituent members 61 and 62 connected to each other via a hinge member (not shown), and each of the lid constituent members 61 and 62 is a lid base 63 formed in a semicircular shape. At the boundary between the plurality of reinforcing ribs 64 formed on the upper surface of the lid base 63 (the surface facing upward when the pressure lid 60 is horizontally deployed as shown in FIG. 2) and the lid constituent members 61 and 62. It is configured to include a plate-shaped mating portion 65 provided. An arcuate contact portion 63a that comes into contact with the ceiling surface 5 when the opening is closed by the pressure air lid 60 is formed on the outer edge of the upper surface of the lid base 63, and the contact portion 63a is airtight. A packing member (not shown) made of rubber, resin, or the like is provided to secure the above.

An upward tapered portion 64a is formed on the outer end portion of the reinforcing rib 64 in the length direction (the end portion on the contact portion 63a side). When the pressure air lid 60 deviates from the opening when the pressure air lid 60 closes the opening, and the taper portion 64a comes into contact with the edge of the opening, the pressure air lid 60 is centered on the opening. It is configured to have a guide function to move to the part. The mating portion 65 on the lid constituent member 61 side and the mating portion 65 on the lid constituent member 62 side are configured so that the surfaces facing each other come into contact with each other when the pressure air lid 60 is deployed, and the surfaces in contact with each other. Is provided with a packing member (not shown) for ensuring airtightness. Further, an upward tapered portion 65a having the same guide function as the tapered portion 64a is formed at the end portion of the mating portion 65 in the length direction.

Here, the folded / unfolded state of the pressure air lid 60 will be described with reference to FIG. The pressure air lid 60A shown in FIG. 3 is different from the pressure air lid 60, but the method of folding and unfolding is the same as that of the pressure air lid 60. As shown in FIG. 3, the pressure air lid 60A is configured to be foldable by folding the upper surface side on which the reinforcing rib 64 is formed into a mountain fold, and in a completely folded state (the lowermost state in the figure), a pair. The lid constituent members 61 and 62 of the above are configured so as to fold each other with the lower surface side thereof inside. These configurations are the same for the pressure air lid 60.

The pressure air lid deployment unit 70 includes a power / communication device 80, a pressure air lid posture changing device 90, a pressure air lid deployment device 100, and a coupling device 110. The power / communication device 80 includes a power supply device and a communication device (both not shown) inside a cylindrical case portion 81 configured to be attached to the lower end portion of the hanging wire 73 extending from the carrier device 32. It is composed of. The power supply device is configured to supply electric power for driving each of the pressure lid attitude changing device 90, the pressure lid deploying device 100, and the connecting device 110. The communication device receives a wireless signal for driving each device 90, 100, 110 (for example, transmitted from the remote control device 12), and operates each device 90, 100, 110 based on the wireless signal. It is configured to output a control signal to be controlled to a drive unit (electric motor, electromagnetic solenoid, not shown) of each device 90, 100, 110.

The pressure air lid attitude change device 90 includes an attitude change winch 91 (driven by an electric motor (not shown)) attached to the lower surface of the case portion 81 of the power / communication device 80, and a winding body portion of the attitude change winch 91. It is configured to include a posture changing wire 92 wound around (not shown). Both ends of the posture changing wire 92 are bifurcated, and each tip of the bifurcated posture changing wire 92 is attached to an annular wire attachment portion 111 included in the connecting device 110. That is, the pressure air lid posture changing device 90 is attached to the pressure air lid 60 via the connecting device 110.

The pressure air lid attitude changing device 90 adjusts the length of the attitude changing wire 92 extending in two directions from the attitude changing winch 91 from the attitude changing wire 92 to the connecting device 110 by the attitude changing winch 91. By doing so, the posture of the pressure air lid 60 is changed. Specifically, as shown in FIG. 4, the length of each portion of the posture changing wire 92 extending in two directions from the posture changing winch 91 is adjusted so that one is longer than the other. This makes it possible to maintain the posture of the compressed air lid 60 in the folded state in the posture of the vertically suspended state (the posture in which the pressure air lid 60 can pass through the opening). Further, as shown in FIG. 5, the lengths of the portions of the posture changing wire 92 extending in two directions from the posture changing winch 91 are adjusted so as to be equal to each other so as to be in a folded state. It is possible to maintain the posture of the pressure air lid 60 in a horizontally suspended posture (horizontal deployment posture in which the pressure air lid 60 can be horizontally deployed).

As shown in FIG. 2, the pressure air lid deploying device 100 includes a deploying winch 101 (driven by an electric motor (not shown)) attached to a connecting device 110 connected to the lid component 61 side, and a deploying winch. The unfolding wire 102 wound around the winding body of the 101 (not shown) and the tip of the unfolding wire 102 attached to the connecting device 110 connected to the lid component 62 side and extending from the unfolding winch 101. A pair of guide rollers 104 (one to the mating portion 65 on the lid component 61 side, and the other to the mating portion 65 on the lid component 61 side) over which the deployment wire fixing portion 103 to which the portions are fixed and the deployment wire 102 extending from the deployment winch 101 are bridged It is rotatably attached to each of the mating portions 65 on the lid constituent member 62 side).

The pressure air lid deploying device 100 is configured to deploy the compressed air lid 60 in a folded state by adjusting the length of the portion of the deployment wire 102 extending from the deployment winch 101 with the deployment winch 101. Has been done. Specifically, as shown in FIG. 5, when the pressure air lid 60 is folded and held in the horizontally suspended posture, the length of the portion of the deployment wire 102 extending from the deployment winch 101 is determined. By shortening the length (the deploying wire 102 is pulled in by the deploying winch 101), the compressed air lid 60 in the folded state can be deployed horizontally as shown in FIGS. 2 and 6.

As shown in FIG. 2, a pair (two) of the connecting devices 110 are provided, one of which is connected to the lid constituent member 61 and the other of which is configured to be connectable to the lid constituent member 62. Specifically, as shown in FIG. 8, the connecting device 110 includes a base 112 on which the wire mounting portion 111 is formed, and a pair of linear motion cylinders 113 housed and held in both ends of the base 112. The linear motion cylinder 113 includes a rod case 114 housed and fixed in the base 112, and a connecting rod 115 held in the rod case 114 so as to be linearly movable. The connecting device 110 is connected to the lid constituent members 61 and 62 via the reinforcing rib 64 on the upper surface side of the lid constituent members 61 and 62, respectively. The connecting rod 115 may be driven by a drive mechanism (not shown) composed of, for example, a ball screw, a linear guide, an electric motor, etc., but is driven by a hydraulic pressure, pneumatic pressure, an electromagnetic solenoid, or the like. It may be configured as such.

As shown in FIGS. 9 and 10, the reinforcing rib 64 connected to the connecting device 110 is formed with a recess 66 into which the tip of the connecting rod 115 can be inserted / retracted, and the connecting rod 115 is a rod case. By advancing from 114 and inserting it into the recess 66, the connecting device 110 is coupled to the pressure air lid 60, and by retracting the connecting rod 115 from the recess 66, the coupling device 110 and the pressure air lid 60 are connected. It is released and the coupling device 110 is configured to be separable from the pressure lid 60. As described above, the pressure lid attitude changing device 90 is attached to the pressure air lid 60 via the connecting device 110, and the pressure air lid deploying device 100 is a component (deployment winch) other than the pair of guide rollers 104. 101, the unfolding wire 102, and the unfolding wire fixing portion 103) are held by the connecting device 110. Therefore, the coupling device 110 is closed with a pressure lid 6
When separated from 0, as shown in FIG. 7, the pressure lid attitude changing device 90 and the pressure air lid deploying device 100 (the guide roller 104 is not separated in this embodiment, but the guide roller 104 is also separated). Is also possible) is also designed to be separated from the pressure lid 60.

Hereinafter, the opening closing method according to the embodiment of the present invention will be described with reference to FIGS. 11 to 19. The opening closing method of the present embodiment is executed by remotely controlling the opening closing device described above, and closes the opening H1 for the material shaft provided below the material shaft 23 and below the man shaft 21. It is applied to the case of closing the opening H2 for the man shaft provided in the above. In FIGS. 11 to 19, the pressure lid 60 and the pressure lid deployment unit 70 are shown schematically in a simplified manner.

In the opening closing method of the present embodiment, first, on the ground or the like, the compressed air lid 60 in a folded state is suspended and held in a vertically suspended posture by a carrier device 32 via a pressure air lid deployment unit 70 (for details, see. See FIG. 4). Then, as shown in FIG. 11, the pressure air lid 60 suspended in the vertically suspended posture is moved downward by the carrier device 32 and passes through the material shaft 23 (see FIG. 1) and the material shaft opening H1. And carry it into the work room 2. At this time, the upper space of the material shaft opening H1 (for example, the space from the material lock 24 to the material shaft opening H1) is maintained in a high atmospheric pressure state equivalent to that in the work room 2.

Next, as shown in FIG. 12, the posture of the pressure air lid 60 carried into the work room 2 is changed to the posture in a vertically suspended state by operating the pressure air lid deployment unit 70 (specifically, the pressure air lid attitude change device 90). The posture is changed from to the horizontal suspension state (see FIG. 5 for details). After changing the posture of the pressure air lid 60, as shown in FIG. 13, the pressure air lid deployment unit 70 (specifically, the pressure air lid deployment device 100) is operated to horizontally deploy the pressure air lid 60 (details are shown in FIG. 6). After the pressure air lid 60 is horizontally deployed, the carrier device 32 is operated to cover the pressure air lid 60 with the material shaft opening H1 from the lower side (work room 2 side) as shown in FIG. Move upward to the (close) position.

After covering the material shaft opening H1 with the pressure air lid 60, the upper space of the material shaft opening H1 is adjusted to be in an atmospheric pressure state. As a result, a pressure difference is generated between the space above the pressure air lid 60 and the inside of the work room 2, and the pressure air pressure difference 60 presses the pressure air lid 60 against the ceiling surface 5, and the opening H1 for the material shaft is the pressure air lid 60. Sealed by. After the pressure air lid 60 seals the opening H1 for the material shaft due to the difference between the internal and external air pressures, as shown in FIG. 15, the pressure air lid deployment unit 70 (specifically, the connecting device 110) is operated to press the air pressure from the pressure air lid 60. The lid deployment unit 70 is separated (see FIG. 7 for details). The separated pressure air lid deployment unit 70 is carried out to the ground by the carrier device 32.

The above is the procedure for closing the material shaft opening H1 with the pressure air lid 60. Next, a case where the opening H2 for the man shaft is closed will be described. Since equipment such as a spiral staircase 25 is provided in the man shaft 21, it is difficult to pass the pressure air lid 60. Therefore, the pressure air lid 60 is carried into the work room 2 via the material shaft 23 and the material shaft opening H1. Therefore, even when the man shaft opening H2 is closed, the procedure for carrying the pressure air lid 60 into the work room 2 and deploying it is the same as when closing the material shaft opening H1 (FIGS. 11 to 15). ), So the description will be omitted. Hereinafter, the procedure after deploying the pressure lid 60 in the work room 2 will be described.

When closing the opening H2 for the man shaft, after deploying the pressure air lid 60 in the work room 2, as shown in FIG. 16, the transport lifting device 120 is moved below the pressure air lid 60, and the loading platform 121 thereof is moved. A pressure lid 60 is placed on top. The transport / lifting device 120 is configured to be movable in the work room 2 and to be able to move the loading platform 121 in the vertical direction. Further, the traveling and lifting operations of the transport lifting device 120 can be controlled by remote control.

After the deployed pressure air lid 60 is placed on the loading platform 121 of the transport lifting device 120, the pressure air lid deployment unit 70 (specifically, the connecting device 110) is operated to deploy the pressure air lid as shown in FIG. The unit 70 is separated from the pressure air lid 60 and carried out to the ground by the carrier device 32. After separating the pressure air lid deployment unit 70 from the pressure air lid 60, the transport lifting device 120 is run to move the pressure air lid 60 mounted on the loading platform 121 to a position below the man shaft opening H2. After the movement, as shown in FIG. 17, the loading platform 121 of the transport lifting device 120 is raised to move the pressure air lid 60 on the loading platform 121 to a position where the pressure air lid 60 covers the man shaft opening H2 from the lower side. Let me. The upper space of the man shaft opening H2 (for example, the space from the man lock 22 to the man shaft opening H2) is the same as that in the work room 2 until the man shaft opening H2 is covered by the air pressure lid 60. It is kept in a high pressure state.

After covering the man shaft opening H2 with the pressure air lid 60, the upper space of the man shaft opening H2 is adjusted to be in an atmospheric pressure state. As a result, a pressure difference is generated between the space above the pressure air lid 60 and the inside of the work room 2, the pressure air pressure difference 60 is pressed against the ceiling surface 5, and the man shaft opening H2 is the pressure air lid 60. Sealed by. After the pressure air lid 60 seals the man shaft opening H2 due to the difference in air pressure between the inside and outside, the loading platform 121 of the transport lifting device 120 is lowered to separate the loading platform 121 from the pressure air lid 60. After the work is completed, the transport lifting device 120 can be carried out to the ground through the material shaft opening H1 and the material shaft 23 by using the carrier device 32.

According to the opening closing device and the method of the above-described embodiment, the carrier device 32, the pressure lid deploying unit 70 (power / communication device 80, pressure lid attitude changing device 90, pressure lid deploying device 100 and connecting device 110) and By remotely controlling the transport lifting device 120, the folded pressure air lid 60 is carried into the work room 2 and unfolded, and the unfolded pressure air lid 60 is used to open the material shaft opening H1 and the man shaft opening. The work of closing the H2 can be performed without an operator entering the work room 2. Further, since the pressure air lid deployment unit 70 is held by the carrier device 32 and is configured to be separable from the pressure air lid 60, the pressure air lid deployment unit 70 can be collected and reused after the work is completed. It becomes. Further, since the lid deploying means (pressure air lid posture changing device 90) and the lid posture changing means (pressure air lid deploying device 100) are configured by using the winch device, these means can be easily realized. Is.

Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments. For example, in the above-described embodiment, the pressure air lid 60 is configured to be foldable by folding the upper surface side on which the reinforcing rib 64 is formed into a mountain fold, but as in the pressure air lid 60B shown in FIG. 20, the reinforcing rib 64 The upper surface side on which the shape is formed may be folded in a valley so as to be foldable. Further, the pressure air lid may be composed of three or more lid constituent members. Further, in the above-described embodiment, the pressure air lid 60 carried into the work room 2 in the vertically suspended posture is changed to the horizontally suspended posture and then deployed, but is maintained in the vertically suspended posture. The pressure lid 60 may be deployed (deployed so that the pressure lid 60 is parallel to the vertical plane), and then the posture of the deployed pressure lid 60 may be changed to be horizontal. Further, in the above-described embodiment, the power / communication device 80, the pressure lid attitude changing device 90, and the pressure air lid deploying device 100 are configured to be separable from the pressure air lid 60 together with the connecting device 110, but all or one of them. The unit (for example, the pressure air lid posture changing device 90 or the pressure air lid deploying device 100) may be fixed to the pressure air lid 60 so as not to be collected.

Further, in the above-described embodiment, the case where the opening to be opened in the work chamber of the pneumatic caisson method is closed by the lid member has been described as an example, but the present invention is set to a pressure state higher than the atmospheric pressure. It can be applied when the opening to be opened in the various pressure air spaces to be closed is closed by the lid member.

1 Caisson 2 Work room 5 Ceiling surface 13 Ground remote control room 21 Man shaft 23 Material shaft 32 Carrier device 60, 60A, 60B Pressure air lid 70 Pressure air lid deployment unit 80 Power / communication device 90 Pressure air lid attitude change device 100 Pressure air lid deployment device 110 Coupling device 120 Transport lifting device H1 Opening for material shaft H2 Opening for man shaft

Claims (5)

It is a device that closes an opening that opens in a pressurized space that is maintained at a pressure higher than atmospheric pressure by covering it from below with a lid member.
The lid member is configured to be foldable and unfoldable.
A folding lid carrying-in means for suspending the lid member in a folded state and moving the lid member downward to carry the lid member into the pressure air space portion through the opening.
A lid deploying means that is attached to the lid member and unfolds the lid member in a folded state.
In the compressed air space portion, the deploying lid moving means for moving the lid member deployed by the lid deploying means to a position where the lid member covers the opening from the lower side .
It is provided with a connecting means provided in the lid deploying means and held by the folding lid carrying-in means to connect and separably connect the lid deploying means and the lid member .
The connecting means has an operating member that can move forward and backward between an operating position and a non-operating position, and a driving unit that drives the operating member between the operating position and the non-operating position.
The lid member and the lid deploying means are coupled by moving the operating member forward to the operating position by the driving unit, and the operating member retracts and moves to the non-operating position by the driving unit to move the lid to the non-operating position. An opening closing device characterized in that the member and the lid deploying means are separated from each other. The posture of the lid member attached to the lid member and suspended in a folded state by the folding lid carrying-in means is changed from the posture when the lid member is carried into the pressure space portion through the opening. The opening closing device according to claim 1, further comprising a lid posture changing means for changing the lid member to a posture that allows the lid member to be horizontally deployed. The second aspect of claim 2 is characterized in that the lid deploying means and the lid posture changing means are coupled and separably connected to the lid member by the connecting means and held by the folding lid carrying-in means. Opening closure device. A communication means for receiving a radio signal for driving the lid deploying means and the lid posture changing means, and a drive for driving the lid deploying means and the lid posture changing means based on the radio signal received by the communication means. The opening closing device according to claim 2 or 3, further comprising means. Even when the lid deploying means is separated from the lid member by the connecting means, the deployable lid moving means can be held at a position where the opening is covered from below in the deployed state of the lid member. The opening closing device according to any one of claims 1 to 4, wherein the opening closing device is configured.

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