JPH05202523A - Elevator for workers for pneumatic caisson - Google Patents

Abstract

PURPOSE:To reduce the cost of construction by a method in which a steel manlock is detachably connected to a shaft extending from the ground surface to the ceiling of operation chamber and detachably attached to the anchor ring of the ceiling of the operation chamber. CONSTITUTION:When a worker comes in an operation chamber B, the compressed air door 5 of a manlock 4 is closed and the pressure of the manlock 4 is raised to the pressure of the chamber B. A sliding elevating shaft 7 is lowered to the chamber B along an anchor ring 6, and the door 8 of the shaft 7 is opened. When a worker goes out from the chamber B, the worker goes into the shaft 7 of the same pressure as the chamber B, the door 8 is closed, the shaft 7 is raised, and the pressure of the manlock 4 is reduced to the atmospheric pressure. The door 5 for workers of the manlock 4 is then opened and workers go out to the ground surface by using an elevator 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic caisson operator elevating facility used when constructing a concrete underground structure in the ground.

[0002]

2. Description of the Related Art In recent years, in the construction of pneumatic caisson of this kind, caisson construction has been started at a large depth. At that time, a worker may use a construction elevator as a facility for raising and lowering a caisson work room. When entering or exiting the caisson's work room under pressure from this construction elevator, the caisson work room is subjected to pressurization or depressurization in an air lock room constructed of concrete above the concrete work room ceiling. I'm doing it.

[0003]

However, according to the above-mentioned conventional example, every time a large depth caisson is constructed,
There was a problem that it required a lock room constructed of concrete, which greatly affected the construction cost and construction period. In addition, there is a problem that the workability is poor because no special measures have been taken to allow workers to easily enter and leave the work room below the caisson from the lock room.

The present invention has been proposed in view of the above, and an object thereof is to replace a concrete air lock chamber with a steel man-lock which can be easily attached and removed and which is used as a work chamber ceiling. It can be installed in a reusable room, has versatility, reduces construction costs, and allows workers to easily enter and leave the work room, improving workability and shortening the construction period. It is to provide worker lifting equipment.

[0005]

According to the present invention, there is provided a shaft 1 which extends from the ground side to a working chamber ceiling a of a pneumatic caisson main body A, and in which an elevator 3 which can be raised and lowered is provided, and the shaft 1. A man made lock 4 made of steel, which is detachably connected and is detachably attached to the anchor ring 6 portion of the working chamber ceiling a, and is provided in the anchor ring 6 and can be raised and lowered in the working chamber B. Therefore, the construction is provided with the slide type lifting shaft 7 having the pressure door 8 for the worker in and out to achieve the above object.

[0006]

As described above, in the present invention, the man-made lock 4 made of steel is replaced with the air lock chamber of the installation type and is detachable from the ceiling a of the work chamber.
Since the man lock 4 is used, the man lock 4 can be removed and reused when the construction is completed, and the man lock 4 itself has versatility and is economical. Further, the man-lock 4 is provided with a slide type elevating shaft 7 which can be raised and lowered in the work chamber B, so that a worker can easily enter and leave the work chamber B, and the workability is improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire construction of a pneumatic caisson worker lifting system according to the present invention.
In the figure, A indicates a main body of a pneumatic caisson made of concrete, and a work chamber B partitioned by a work chamber ceiling a is formed below the main body. Also, 1
Is a cylindrical shaft that is erected on the upper part of the ceiling a of the work chamber and extends to the ground side, and is sequentially added as the main body A sinks.

A guide rail 2 is provided inside the shaft 1, and a guide elevator 2 is provided with a work elevator 3 which can be raised and lowered. Then, the worker can move up and down in the shaft 1 by the construction elevator 3 along the guide rail 2 attached to the shaft 1 under atmospheric pressure. An opening 1a is formed on the lower side surface of the shaft 1, and the manlock 4
A communication pipe 1b is connected to. A pressure door 5 that can be opened and closed is provided at the connection portion of the man lock 4, and a worker can enter the man lock 4 by opening the worker entrance pressure door 5 of the man lock 4 under atmospheric pressure. .. The man lock 4 can be easily attached to and detached from the shaft 1 through the communication pipe 1b and the flanges b of the man lock 4 by means of bolts and nuts.

The man-lock 4 has a ceiling A in the work room.
Is attached to the anchor ring 6 part installed by using bolts and nuts, etc., and a bottomed cylindrical slide type elevating shaft 7 for elevating the worker is attached to the inner part of the anchor ring 6. Has been. A pressure door 8 for workers to enter and exit is attached to the side surface of the slide type lifting shaft 7. When the worker in and out of the work chamber B comes in and out, the pressure door 5 of the man lock 4 is closed and the man lock 4 is pressurized to the same pressure as the work chamber B.
After pressurization, as shown in FIG. 2, the slide type lifting shaft 7 is slid down to the working chamber B along the anchor ring 6 by the lifting mechanism described later. Then, open the operator access air pressure door 8 of the slide type lifting shaft 7,
Work room B can be entered.

Next, when exiting from the work chamber B, the slide type lifting shaft 7 having the same pressure as that of the work chamber B is entered, the worker's entrance / exit pressure door 8 is closed, and the slide type lifting shaft 7 is slid up. .. Next, the man-lock 4 is depressurized to atmospheric pressure, and the operator entrance / exhaust air door 5 of the man-lock 4 is opened.
You can get to the ground by the construction elevator.

FIG. 3 shows the details of the lifting mechanism for the slide type lifting shaft 7. That is, an upper flange portion 9 is formed on the outer circumference of the upper end of the slide type elevating shaft 7 and the tubular portion, and a supporting metal piece 10 is provided on the upper flange portion 9, and a lifting wire 11 is attached to the supporting metal piece 10. Is attached to the other end of the elevating wire 11 and is wound around the receiving roller 12 supported by the inner wall of the man lock 4 and fixed to the wire winding drum 13.

4, the wire winding drum 13 is connected to a hydraulic cylinder 14 and a drum winding wire 15 connected to the hydraulic cylinder 14, and the wire winding drum 13 is rotated and slides. The elevating shaft 7 can be moved up and down. The wire winding drum 13 is composed of a plurality of winding drums, and the stroke of the hydraulic cylinder 14 can be shortened due to the difference in diameter of the winding drums. Further, packing 17 is attached to the upper and lower surfaces of the lower flange 16 of the anchor ring 6, and when the manlock 4 is at atmospheric pressure, the lower flange 16 of the anchor ring 6 and the flange 18 make contact with each other. 4 can be kept airtight. Further, when the slide type elevating shaft 7 is slid, the man lock 4 and the working chamber B have the same pressure, so that there is no air leakage from each flange portion.

[0013]

When a worker moves up and down in a caisson using an elevator for construction, conventionally, an air lock chamber made of a concrete structure is constructed, and the pressure is increased and decreased there, or the elevator for construction, or Although it was in and out of the working room of the caisson, in this invention, the manlock is made of steel, and it can be easily attached to and detached from the anchor ring provided on the ceiling of the working room by other appropriate mounting means such as bolts and nuts. Since it can be used universally for various caisson bodies, it is economical, and by using this man lock, you can enter and exit the construction elevator or the caisson work room without constructing a concrete structure. There is an advantage that can be. In addition, since the anchor ring integrated with the man lock is provided with a shaft that can be raised and lowered within the working chamber, a worker can easily enter and leave the working chamber using this shaft, improving workability, The construction period can be shortened.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a pneumatic caisson worker lifting system according to an embodiment of the present invention.

FIG. 2 is an operation explanatory view of the above.

FIG. 3 shows details of an entire lifting mechanism of a slide type lifting shaft used in the present invention.

FIG. 4 shows a partial explanatory view of the above.

[Explanation of symbols]

 1 Shaft 1a Opening 1b Communication Pipe 2 Guide Rail 3 Construction Elevator 4 Manlock 5 Manlock Pressure Door 6 Anchor Ring 7 Sliding Lift Shaft 8 Sliding Lift Shaft Compressor Door 9 Sliding Lift Shaft Upper Flange 10 Support Hardware 11 Wire 12 Receiving Roller 13 Wire Winding Drum 14 Hydraulic Cylinder 15 Drum Winding Wire 16 Anchor Ring Lower Flange 17 Packing 18 Sliding Lift Shaft Upper Flange A Caisson Body a Working Room Ceiling B Working Room

Claims (1)

[Claims] 1. A shaft 1 which extends from the ground side to a working chamber ceiling a of a pneumatic caisson main body A, and in which an elevator 3 which can be raised and lowered is provided, and the shaft 1.
And a man-made steel 4 which is detachably connected to the anchor ring 6 of the working chamber ceiling a and is detachably attached to the anchor ring 6 and is provided in the anchor ring 6 and can be raised and lowered in the working chamber B. A pneumatic caisson worker lifting facility having a slide type lifting shaft 7 having a pressure door 8 for allowing workers to move in and out.