JP6837814B2 - High pressure indoor adsorption device - Google Patents

Description

The present invention relates to an anticyclone indoor adsorption device provided with an adsorption pad for adsorbing to an adsorption mating surface provided in an anticyclone chamber having a pressure higher than atmospheric pressure.

As an example of the high pressure chamber as described above, there is a working room in the pneumatic caisson method known as a method for constructing underground structures such as bridges, foundations of buildings, and starting shafts of shield tunnels. 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 at a pressure state higher than the atmospheric pressure (for example, Patent Document 1). reference).

JP-A-2015-108244

Since there is a risk of anticyclone injury (decompression sickness), the time that a worker can enter the work room and perform work is limited. Therefore, it is desirable to improve the work efficiency in the work room and shorten the work time. Therefore, it is required to use the suction pad in the work in the work room. The suction pad can be easily sucked on or separated from the suction mating surface by adjusting the air pressure inside the pad, so that various operations can be performed efficiently by using this. Expected to be.

However, since the conventional suction pad is configured to obtain the suction force by setting the inside of the pad to the vacuum pressure, equipment such as a vacuum pump for generating the vacuum pressure is required, which increases the cost. There is a concern.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a high-pressure chamber adsorption device capable of obtaining an adsorption force without setting the inside of the adsorption pad to a vacuum pressure.

In order to achieve the above object, the high pressure chamber suction device according to the present invention is a suction device used in a high pressure chamber (for example, a working room 2 in the embodiment) maintained at a pressure state higher than the atmospheric pressure. A suction pad that is brought into contact with a suction mating surface (for example, the ceiling surface 5 in the embodiment) provided in the high pressure chamber to form an inner pad space between the suction mating surface and the suction mating surface, and an atmospheric pressure is applied to the pad inner space. Bei example and the atmospheric pressure introducing means, the directing, the atmospheric pressure introducing means comprises an atmospheric pressure introduction passage communicating with the outside space with the pad space and atmospheric pressure, through the atmospheric pressure introduction passage, It is configured to guide the atmospheric pressure in the external space to the space inside the pad.

In the above hyperbaric chamber adsorber, the atmospheric pressure introducing means, be configured with a front Symbol atmospheric pressure introduction control valves for controlling the opening and closing of the atmospheric pressure introduction passage provided in the atmospheric pressure introduction passage preferable.

In the above-mentioned high-pressure indoor adsorption device, it is preferable to provide a high-pressure introducing means for guiding a pressure higher than the atmospheric pressure in the space inside the pad.

In the high-pressure indoor adsorption device, the high-pressure introduction means is provided in the high-pressure introduction path that communicates the space inside the pad and the high-pressure chamber, and the high-pressure introduction path that is provided in the high-pressure introduction path to control the opening and closing of the high-pressure introduction path. It is preferably configured with a control valve.

In the high-pressure indoor suction device, the suction pad has a plurality of displaceable legs provided at one end, and the suction position of the suction pad on the suction mating surface while displaceing the plurality of legs. May be modified to include a moving body that moves along the suction mating surface.

In the above-mentioned high-pressure chamber suction device, the suction pad is provided on a traveling rail attached to the ceiling portion of the high-pressure chamber for traveling and moving the work machine, and the traveling rail is suction-fixed to the ceiling portion. It may be configured.

In the above-mentioned high-pressure chamber suction device, a holding base for holding the suction pad and an outer body attached to the outer surface portion of the holding base and relatively movable along the outer surface portion are provided, and the holding base includes the above-mentioned holding base. A ventilation passage extending from the inner space of the pad to the outer surface portion for communicating the inner space of the pad and the high pressure chamber is formed, and the outer body has an end opening on the outer surface portion side of the ventilation passage. It may be configured to be movable between a position where the ventilation path is exposed and opened and a position where the ventilation path is closed by covering the end opening.

According to the present invention, the suction pad which is brought into contact with the suction mating surface provided in the high pressure chamber to form the space inside the pad between the suction mating surface and the atmospheric pressure introducing means for guiding the atmospheric pressure into the space inside the pad. Bei example, the atmospheric pressure introducing means comprises an atmospheric pressure introduction passage communicating with the outside space has a pad in space and the atmospheric pressure, via atmospheric introduction path leads to the atmospheric pressure in the external space into the pad space It is configured as follows. By guiding the atmospheric pressure of the external space to the space inside the pad, the air pressure in the space inside the pad becomes lower than that in the high pressure room. Can be obtained. Therefore, since it is not necessary to set the space inside the pad to a vacuum pressure in order to obtain the suction force, it is possible to suppress the equipment cost without the need for equipment such as a vacuum pump.

The atmospheric pressure introducing means, with the configuration having the atmospheric pressure introduction control valves which are provided on the atmospheric pressure introduction passage for controlling the opening and closing of the atmospheric pressure introduction passage, and a state for guiding the atmospheric pressure in the external space into the pad space The switching from the state of shutting off the atmospheric pressure so as not to be guided to the space inside the pad can be accurately controlled by the atmospheric pressure introduction control valve.

In the present invention, if the space inside the pad is provided with the high pressure introducing means for guiding the pressure higher than the atmospheric pressure, the space inside the pad and the high pressure chamber can be connected by guiding the pressure higher than the atmospheric pressure to the space inside the pad. Since the pressure difference can be reduced to reduce the suction force of the suction pad, the suction pad can be easily separated from the suction mating surface.

If the high-pressure introduction means has a high-pressure introduction path that connects the space inside the pad and the high-pressure room, and a high-pressure introduction control valve that is provided in the high-pressure introduction path and controls the opening and closing of the high-pressure introduction path, the high-pressure room. It is possible to accurately control the switching between the state of guiding the high atmospheric pressure to the space inside the pad and the state of blocking the high atmospheric pressure from being guided to the space inside the pad by the high pressure introduction control valve.

In the present invention, the suction pad has a plurality of displaceable legs provided at one end, and the suction position of the suction pad to the suction mating surface is changed while the plurality of legs are displaced to form the suction mating surface. If the structure is provided with a moving body that moves along the line, it is possible to realize a moving body that can move while adsorbing on the ceiling surface or the like in the high pressure chamber. Further, it is also possible to perform a predetermined work in the high pressure chamber using this moving body.

In the present invention, if the suction pad is provided on the traveling rail attached to the ceiling portion in the high pressure chamber for traveling and moving the work equipment, and the traveling rail is suction-fixed to the ceiling portion, the ceiling portion of the traveling rail is provided. Since the work of attaching to the ceiling can be performed by utilizing the suction force of the suction pad, it is possible to improve the work efficiency.

In the present invention, a holding base that holds the suction pad and has a ventilation path for communicating the space inside the pad and the high-pressure chamber, and an end portion of the ventilation path on the outer surface side that is attached to the outer surface of the holding base. If the configuration is provided with an outer body that can move between a position where the mouth is exposed to open the air passage and a position where the end mouth is covered and the air passage is closed, a high air pressure is generated in the space inside the pad. The outer body can be switched between a state in which the space inside the pad and the high-pressure room are communicated so as to be guided, and a state in which communication between the space inside the pad and the high-pressure room is cut off so that high pressure is not guided to the space inside the pad. By moving it, it becomes possible to control it accurately.

It is a vertical cross-sectional view which shows the main equipment of the pneumatic caisson method. It is a schematic diagram which shows the whole structure of the high pressure chamber adsorption apparatus which concerns on 1st Embodiment of this invention. It is a vertical cross-sectional view which shows the structure of the suction unit shown in FIG. It is a schematic diagram which shows the whole structure of the high pressure chamber adsorption apparatus which concerns on 2nd Embodiment of this invention. It is a schematic diagram which shows the structure of the ceiling traveling robot shown in FIG. It is a vertical cross-sectional view which shows the structure at the time of the suction release of the leg suction unit which the ceiling traveling robot has. It is a vertical cross-sectional view which shows the structure at the time of suction of the said leg suction unit. It is a schematic diagram which shows the whole structure of the high pressure chamber adsorption apparatus which concerns on 3rd Embodiment of this invention. FIG. 5 is a partial cross-sectional view showing a configuration of the traveling rail shown in FIG. 8 when mounted on the ceiling. It is a perspective view which shows the structure of the traveling rail before mounting on the ceiling.

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 high-pressure chamber adsorption device according to the present invention is installed will be described with reference to FIG. In the pneumatic caisson method, the reinforced concrete caisson 1 is submerged underground by using the excavation equipment E1, the equipment equipment E2, the soil removal equipment E3, the air supply equipment E4, and the reserve / safety equipment E5. It is configured to build a structure.

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 includes a cylindrical man shaft 21 that connects the ground and the work room 2 so that a worker can enter and exit the work room 2, and the atmospheric pressure on the ground and the pressure in the work room 2 provided on the man shaft 21. A man lock 22 (airlock) that adjusts the difference, a cylindrical material shaft 23 that connects the ground and the work room 2 to carry the earth bucket 31 loaded with earth and sand by the automatic earth and sand loading device 11 to the ground, and The material shaft 23 is provided with a material lock 24 (airlock) that adjusts the atmospheric pressure on the ground and the pressure difference in the work room 2. 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 changes in the air pressure in the work room 2. Has been done.

The earth 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 the 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 air 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 high-pressure chamber adsorption device 60 according to the first embodiment of the present invention will be described with reference to FIGS. 2 and 3. As shown in FIG. 2, the high-pressure indoor suction device 60 of the present embodiment includes a suction unit 61 configured to be suction-fixable to the ceiling surface 5 of the work room 2 and an external space (space on the ground) in an atmospheric pressure state. It is configured to include an exhaust passage 4 that communicates with the inside of the work room 2 and an atmospheric pressure introduction hose H1 that connects the lower end portion of the exhaust passage 4 and the suction unit 61. Opening / closing valves V1 and V2 are provided at the upper end and the lower end of the exhaust passage 4, respectively, and the atmospheric pressure introduction hose H1 is connected to the lower end of the exhaust passage 4 via the opening / closing valve V2.

As shown in FIG. 3, the suction unit 61 includes a suction pad 63 formed in a conical surface shape and a columnar pad holder 64 that holds the suction pad 63. The suction pad 63 is configured so that the edge on the open end side is in contact with the ceiling surface 5, and when the suction pad 63 is in contact with the ceiling surface 5, it is between the suction pad 63 and the ceiling surface 5 (of the suction pad 63). On the inner side), a pad inner space 65 separated from the surroundings is formed.

In the pad holding body 64, two ventilation passages R1 and R2 are formed which communicate the space inside the pad 65 and the inside of the work room 2. The ventilation passage R1, together with the exhaust passage 4 and the atmospheric pressure introduction hose H1, constitutes an atmospheric pressure introduction path for guiding the atmospheric pressure on the ground to the space 65 in the pad, and the atmospheric pressure introduction hose via the opening / closing valve V3. It is connected to H1. The ventilation passage R2 constitutes a high pressure introduction path for guiding the air pressure in the work room 2 (hereinafter, appropriately referred to as “indoor air pressure”) to the space inside the pad 65, and at the end of the work room 2 side. Is provided with an on-off valve V4. Further, at the lower part of the pad holder 64, an annular metal fitting 66 for suspending a cargo handling work tool LB (shown in FIG. 2) such as a chain block is provided.

The suction unit 61 configured as described above supports the cargo handling work tool LB by suspending it at an arbitrary position on the ceiling surface 5 when performing cargo handling work such as lifting or moving a heavy object in the work room 2. Act as a possible support. Hereinafter, the operation of the present embodiment (mainly the procedure for attaching and detaching the suction unit 61 to and from the ceiling surface 5) will be described. First, a position for suspending the cargo handling work tool LB is determined according to the place where the cargo handling work is performed, and the suction unit 61 is moved to that position to bring the suction pad 63 into contact with the ceiling surface 5. At this time, all the on-off valves V1 to V4 are set to the closed state.

Next, with the suction pad 63 in contact with the ceiling surface 5, the opening / closing valves V1 to V3 corresponding to the atmospheric pressure introduction control valve are opened, and the pad inner space 65 and the ground are communicated with each other to communicate the pad inner space 65. Atmospheric pressure is guided to (exhaust compressed air in the pad space 65). As a result, a pressure difference (the space inside the pad 65 is lower) is generated between the space inside the pad 65 and the inside of the work room 2, and the suction force that the suction pad 63 adsorbs to the ceiling surface 5 is obtained by the pressure difference. Be done. Since the suction unit 61 can be sucked and fixed to the ceiling surface 5 by the obtained suction force, the cargo handling work tool LB can be suspended from the annular metal fitting 66 of the suction unit 61 to perform the cargo handling work.

When removing the suction unit 61 that is suction-fixed to the ceiling surface 5, first, at least one of the on-off valves V1 to V3 is closed to block the communication between the pad inner space 65 and the ground. Next, the open / close valve V4 corresponding to the high pressure introduction control valve is opened to communicate the space inside the pad 65 with the inside of the work room 2 and guide the room pressure to the space inside the pad 65 (compressed air in the work room 2 is padded). Introduced in the inner space 65). As a result, the pressure difference between the space inside the pad 65 and the inside of the work room 2 is reduced, the suction force of the suction pad 63 is weakened, and the suction unit 61 can be removed from the ceiling surface 5.

According to the high-pressure chamber suction device 60 of the present embodiment, the suction unit 61 can be sucked and fixed at an arbitrary position on the ceiling surface 5, and the cargo handling work tool LB can be suspended there to perform cargo handling work. The suction unit 61 can be easily sucked and fixed to the ceiling surface 5 by guiding the atmospheric pressure to the pad inner space 65, and can be easily removed from the ceiling surface 5 by guiding the indoor pressure to the pad inner space 65. it can. Therefore, since the position where the cargo handling work tool LB is suspended can be easily changed, the cargo handling work (particularly the work of changing the hanging position of the cargo handling work tool LB) can be efficiently performed.

Next, the high-pressure chamber adsorption device 70 according to the second embodiment of the present invention will be described with reference to FIGS. 4 to 7. The components common to the first embodiment are designated by the same reference numerals in the drawings, and detailed description thereof will be omitted (the same applies to the third embodiment). As shown in FIG. 4, the high-pressure indoor adsorption device 70 of the present embodiment includes a ceiling traveling robot 71 as a moving body configured to be movable along the ceiling surface 5 of the work room 2, and the ground and the inside of the work room 2. It is configured to include an exhaust passage 4 that communicates with the above, and an atmospheric pressure introduction hose H2 that connects the lower end of the exhaust passage 4 and the ceiling traveling robot 71.

As shown in FIG. 4, the ceiling traveling robot 71 includes a moving body base 72 (composed of a columnar portion 72a and a dome-shaped portion 72b) and a plurality of displaceable robots extending from the cylindrical portion 72a of the moving body base 72. It has a robot leg 73 of a book (two in the figure, but can be added as appropriate) and a displaceable robot arm 74 extending from the dome-shaped portion 72b of the moving body base 72 (which can be added as appropriate). A suction unit 75 is provided at the tip of each leg 73, and a working device 76 (for example, a cleaning device capable of ejecting cleaning water is used as another working device) is also provided at the tip of the robot arm 74. Good) is provided.

As shown in FIG. 5, a suction pad 76 is provided inside the suction unit 75. The detailed configuration thereof will be described later, but the suction pad 76 is configured to form an in-pad space 77 between the suction pad 76 and the ceiling surface 5 by abutting on the ceiling surface 5. ..

Inside each of the suction unit 75, the robot leg 73, and the moving body base 72, a ventilation path network connecting the pad inner space 77 and the atmospheric pressure introduction hose H2 is formed. Specifically, a plurality of valves extending from the pad inner space 77 through the suction unit 75 and the robot leg 73 to the columnar portion 72a of the moving body base 72 (the number is set according to the number of the robot legs 73). The ventilation passages R3 are provided, and each ventilation passage R3 is connected to a collecting ventilation pipe 78 provided in the columnar portion 72a via an on-off valve V5. A ventilation passage R4 is connected to the collective ventilation pipe 78, and this ventilation passage R4 is connected to the atmospheric pressure introduction hose H2 via an on-off valve V6. These ventilation path networks (ventilation passages R3, R4 and collective ventilation pipe 78), together with the exhaust passage 4 and the atmospheric pressure introduction hose H2, form an atmospheric pressure introduction passage for guiding the atmospheric pressure on the ground to the space 77 in the pad. ..

As shown in FIGS. 6 and 7, the suction unit 75 is attached so as to cover the cylindrical holding base 79 that holds the suction pad 76 and the outer surface portion of the holding base 79, and is attached to the upper and lower sides in the drawing along the outer surface portion. It is configured to have a cylindrical outer shell 81 (composed of an outer shell base 81a and an outer cover 81b) that can move relative to each other in a direction (the axial direction of the holding base 79). The holding base 79 has two ventilation passages R5 (indoor air pressure can be changed as appropriate) extending from the pad inner space 77 to the outer surface portion and communicating the pad inner space 77 and the work room 2 (the number of the inner air pressure can be changed as appropriate). (Consists of a high pressure introduction path) is formed. The outer body 81 has a position where the end port 82 on the outer surface side of the ventilation path R5 is exposed to open the ventilation path R5 (see FIG. 6) and a position where the end opening 82 is covered and the ventilation path R5 is closed. It is configured to be movable between (see FIG. 7). The robot leg 73 is fixed to the holding base 79 but not to the outer shell 81, and when the outer shell 81 moves relative to the holding base 79, the robot leg 73 is fixed to the holding base 79. It is configured to move relative to 73 as well.

As shown in FIGS. 6 and 7, the suction pad 76 is formed in a conical surface shape, and the edge portion on the open end side thereof is configured to be in contact with the ceiling surface 5. Further, when abutted, a pad inner space 77 separated from the surroundings is formed between the suction pad 76 and the ceiling surface 5 (inside of the suction pad 76).

Hereinafter, the operation of this embodiment will be described. When the suction unit 75 in the unadsorbed state is adsorbed on the ceiling surface 5, first, the adsorption pad 76 of the adsorption unit 75 is brought into contact with the ceiling surface 5. At this time, the opening / closing valve V5 on the ventilation path connected to the suction unit 75 is closed, but if there is another suction unit 75 already sucked on the ceiling surface 5, the valve is used to maintain the suction force. The opening / closing valve V5 on the ventilation path connected to V1, V2, V6 and the other suction unit 75 is opened. Further, the outer shell 81 of the suction unit 75 to be sucked is moved to a position covering the end opening 82 of the ventilation path R5, and the ventilation path R5 is closed (before the suction pad 76 is brought into contact with the ceiling surface 5). It may be closed after the suction pad 76 is brought into contact with the ceiling).

Next, with the suction pad 76 in contact with the ceiling surface 5, the closed opening / closing valve V5 is opened, and the pad inner space 77 and the ground are communicated with each other to guide the atmospheric pressure to the pad inner space 77 (. The compressed air in the pad inner space 77 is discharged). As a result, the air pressure in the pad inner space 77 becomes lower than the air pressure in the work room 2, and the suction force of the suction pad 76 can be obtained by the pressure difference. The suction unit 75 can be sucked onto the ceiling surface 5 by the obtained suction force.

When pulling the sucked suction unit 75 away from the ceiling surface 5, first, the opening / closing valve V5 on the ventilation path connected to the suction unit 75 to be pulled away is closed to block the communication between the pad inner space 77 of the suction unit 75 and the ground. To do. Next, the outer shell 81 of the suction unit 75 is moved to a position where the end opening 82 of the ventilation passage R5 is exposed, and the ventilation passage R5 is opened. As a result, the pressure difference between the space 77 in the pad and the inside of the work room 2 is reduced, the suction force of the suction pad 76 is weakened, and the suction unit 75 can be separated from the ceiling surface 5.

According to the high-pressure indoor suction device 70 of the present embodiment, the ceiling traveling robot 71 is sucked and fixed at an arbitrary position on the ceiling surface 5 by sucking the suction unit 75 provided on each robot leg 73 on the ceiling surface 5. Then, it becomes possible to perform the cleaning work there. Further, by changing the suction position of each suction unit 75 to the ceiling surface 5 while dislocating the plurality of robot legs 73, the ceiling traveling robot 71 can be moved along the ceiling surface 5, so that the ceiling traveling can be performed. It is also possible to perform the cleaning work while moving the robot 71.

Next, the high-pressure chamber adsorption device 90 according to the third embodiment of the present invention will be described with reference to FIGS. 8 to 10. As shown in FIG. 8, the high-pressure indoor adsorption device 90 of the present embodiment has a traveling rail 91 attached to the ceiling surface 5 of the work room 2, an exhaust passage 4 communicating with the ground and the inside of the work room 2, and an exhaust passage. It is configured to include a ventilation path R5 that branches from 4 and extends through the body of the caisson 1 to the mounting position of the traveling rail 91. The traveling rail 91 is attached to a predetermined position on the ceiling surface 5, and is configured to travel while the caisson excavator 100 is suspended therein. The ventilation passage R5 is installed in the skeleton in advance according to the planned installation position of the traveling rail 91 when forming the lower skeleton of the caisson 1 (at the time of placing concrete), and is installed in the skeleton in advance from the exhaust passage 4. An opening / closing valve V7 for opening / closing the ventilation path R5 is provided at the branch portion.

As shown in FIG. 10, the traveling rail 91 is formed of an H-shaped steel material, and a plurality of (six in the figure, but can be appropriately changed) bolt insertion holes 93 are formed in the flange portion 92 on the upper side thereof. (Not shown) is provided. A frame-shaped suction pad 94 formed so as to avoid the position of the bolt insertion hole 93 is provided on the upper surface of the flange portion 92 (the surface facing the ceiling surface 5). As shown in FIG. 9, the suction pad 94 is configured to come into contact with the ceiling surface 5 when the traveling rail 91 is attached to the ceiling surface 5, and when the traveling rail 91 comes into contact with the ceiling surface 5, the suction pad 94 and the ceiling surface 5 are in contact with each other. A pad inner space 95 separated from the surroundings is formed between the and (the inner side of the suction pad 94).

Hereinafter, the operation of the present embodiment (mainly the procedure for attaching / detaching the traveling rail 91 to / from the ceiling surface 5) will be described. When attaching the traveling rail 91 to the ceiling surface 5, first, the traveling rail 91 is arranged so that the suction pad 94 abuts on the ceiling surface 5. At this time, the on-off valve V7 is closed.

Next, the opening / closing valves V1 and V7 are opened with the suction pad 94 in contact with the ceiling surface 5, and the pad inner space 95 and the ground are communicated with each other to guide the atmospheric pressure to the pad inner space 95 (pad inner space). Exhaust 95 compressed air). As a result, the air pressure in the pad inner space 95 becomes lower than the air pressure in the work room 2, and the suction force of the suction pad 94 can be obtained by the pressure difference. The traveling rail 91 can be attracted and held on the ceiling surface 5 by the obtained suction force. In this state, a fixing bolt (not shown) is further inserted into each bolt insertion hole 93, and a bag nut (not shown) installed in advance on the ceiling surface 5 and the bolt are screwed together to form a traveling rail. The 91 is more firmly fixed to the ceiling surface 5. The bolt is for obtaining a sufficient fixing force capable of suspending the caisson excavator 100, and may not be used when a sufficient fixing force can be obtained by the suction force of the suction pad 94.

When removing the traveling rail 91 that is attracted and fixed to the ceiling surface 5, loosen or remove the bolt inserted in the bolt insertion hole 93 while the caisson excavator 100 is not suspended, and close the open / close valve V7 to pad. The communication between the inner space 95 and the ground is cut off (whichever comes first). Further, a gap is formed between the suction pad 94 and the ceiling surface 5 by a tool or the like so that the compressed air in the work room 2 flows into the pad inner space 95 from there. As a result, the pressure difference between the space inside the pad 95 and the inside of the work room 2 is reduced, the suction force of the suction pad 94 is weakened, and the traveling rail 91 can be removed from the ceiling surface 5.

According to the high-pressure indoor suction device 90 of the present embodiment, at least a part of the fixing force required for fixing the traveling rail 91 to the ceiling surface 5 and running the caisson excavator 100 is obtained by the suction force of the suction pad 94. be able to. Therefore, it is possible to avoid using other fixing means such as bolts for obtaining a fixing force, or to reduce the number of bolts used. Further, the suction pad 94 can easily obtain the suction force by guiding the atmospheric pressure to the pad inner space 95, and easily sucks the compressed air in the work room 2 by allowing the compressed air in the work room 2 to flow into the pad inner space 95. The force can be reduced. Therefore, the work of attaching and detaching the traveling rail 91 to and from the ceiling surface 5 can be efficiently performed.

The high-pressure indoor suction devices 60, 70, 90 of each of the above-described embodiments guide the atmospheric pressure to the pad inner spaces 65, 77, 95 formed by the suction pads 63, 76, 94, thereby guiding the pad inner space 65, 77, 95 causes a state where the air pressure is lower than that in the work room 2, and the pressure difference is configured to obtain the suction force for the suction pads 63, 76, 94 to be sucked on the ceiling surface 5. There is. Therefore, since it is not necessary to set the space inside the pad to a vacuum pressure in order to obtain the suction force, it is possible to suppress the equipment cost without the need for equipment such as a vacuum pump.

The pad inner spaces 65, 77, 95 are preferably formed so as to have airtightness and airtightness, but if the required adsorption force can be obtained by guiding the atmospheric pressure inside the pad, the work room 2 A gap or the like through which the compressed air inside flows into the inside may be formed between the ceiling surface 5 and the ceiling surface 5. Further, as long as the suction pads 63, 76, 94 can form the pad inner spaces 65, 77, 95 as described above with the ceiling surface 5, and can obtain a reaction force at the time of suction. It can be formed of any material such as metal, synthetic resin, and rubber. The on-off valves V1 to V7 are preferably valves that can be remotely controlled, such as solenoid valves, but if the valves are located in the work room 2 and can be directly operated by an operator (for example, on-off valves V3 and V4). , May be a manually operated valve.

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 first embodiment, the suction unit 61 is provided with a ventilation passage R2 and an opening / closing valve V4 for guiding the indoor air pressure into the pad inner space 65 when the suction unit 61 is removed. For example, the suction pad 63. If a gap is formed between the ceiling surface 5 and the ceiling surface 5 with a tool or the like to remove the suction unit 61, the ventilation passage R2 and the opening / closing valve V4 need not be provided.

Further, in the above-described third embodiment, when the traveling rail 91 is removed from the ceiling surface 5, the high pressure introduction path and the high pressure introduction control valve for guiding the indoor air pressure to the space inside the pad are not provided, but they may be provided. Good. When the high pressure introduction path is provided, it may be arranged in the skeleton of the caisson 1. Further, the high pressure introduction path may be arranged so as to guide the compressed air from the work room 2, or the high pressure introduction path may be arranged so as to guide the compressed air from the air supply path 3. On the other hand, the high pressure introduction path and the high pressure introduction control valve may be provided on the traveling rail 91 side.

Further, in each of the above-described embodiments, when the suction pad is brought into contact with the ceiling surface, a space inside the pad is formed inside the suction pad, but a recess is formed on the ceiling surface. The space inside the pad may be formed on the ceiling surface side by bringing the suction pad into contact with the recess so as to cover the recess. Further, in each of the above-described embodiments, the suction pad is fixed to the ceiling surface and used, but the suction pad may be used by being sucked on a movable work or the like instead of being sucked on the fixed object. ..

Further, in each of the above-described embodiments, the embodiment in which the suction pad is used in the work chamber of the pneumatic caisson method has been described as an example, but the present invention has been described in various places where the pressure state is set higher than the atmospheric pressure. It can be applied when using a suction pad in.

1 Caisson 2 Work room 3 Air supply passage 4 Exhaust passage 61,75 Suction unit 63,76,94 Suction pad 65,77,95 Pad inner space 73 Robot leg 78 Collective ventilation pipe 79 Holding base 81 Outer body 91 Travel rail 100 Excavator (caisson excavator)
R1 to R5 Ventilation passage V1 to V7 Open / close valve H1, H2 Atmospheric pressure introduction hose

Claims (7)

An adsorption device used in a high-pressure room maintained at a pressure higher than atmospheric pressure.
A suction pad that is brought into contact with the suction mating surface provided in the high pressure chamber to form a space inside the pad between the suction mating surface and the suction pad.
E Bei and a atmospheric pressure introducing means for introducing atmospheric pressure into the pad space,
The atmospheric pressure introducing means is
It has an atmospheric pressure introduction path that communicates the space inside the pad with the external space having atmospheric pressure.
A high-pressure indoor adsorption device characterized in that it is configured to guide the atmospheric pressure in the external space to the space inside the pad via the atmospheric pressure introduction path. The atmospheric pressure introducing means, according to claim 1, characterized in that it is configured with an atmospheric pressure introduction control valves previous SL provided on the atmospheric pressure introduction passage for controlling the opening and closing of the atmospheric pressure introduction passage High pressure indoor adsorption device. The high-pressure indoor adsorption device according to claim 1 or 2, wherein the pad inner space is provided with a high-pressure introducing means for guiding a pressure higher than the atmospheric pressure. The high-pressure introduction means includes a high-pressure introduction path that communicates the space inside the pad and the high-pressure chamber, and a high-pressure introduction control valve that is provided in the high-pressure introduction path and controls the opening and closing of the high-pressure introduction path. The high-pressure chamber adsorption device according to claim 3, wherein the high-pressure chamber adsorption device is configured. The suction pad has a plurality of displaceable legs provided at one end, and the suction position of the suction pad to the suction mating surface is changed while the plurality of legs are displaced to change the suction mating surface. The high-pressure indoor adsorption device according to any one of claims 1 to 4, wherein the moving body is provided with a moving body that moves along the same. The suction pad is provided on a traveling rail attached to the ceiling portion of the high pressure chamber for traveling and moving the work machine, and is characterized in that the traveling rail is suction-fixed to the ceiling portion. The high-pressure indoor adsorption device according to any one of claims 1 to 4. A holding base for holding the suction pad and an outer body attached to the outer surface portion of the holding base and relatively movable along the outer surface portion are provided.
The holding substrate is formed with a ventilation path extending from the space inside the pad to the outer surface portion for communicating the space inside the pad and the high pressure chamber.
The outer shell can move between a position where the end opening on the outer surface side of the ventilation path is exposed to open the ventilation path and a position where the end opening is covered and the ventilation path is closed. The high-pressure chamber adsorption device according to any one of claims 1 to 6, wherein the high-pressure chamber adsorption device is configured in the above.

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