JP3305823B2 - Lifting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting apparatus for transporting earth and sand excavated underground at a building construction site to the ground.

[0002]

2. Description of the Related Art As a building construction method, there is known a construction method called a reverse hitting method. This reverse construction method is a construction method in which the first floor is constructed first, and then the underground part and the above-ground part are constructed at the same time. Having.

Since the underground portion is excavated after the first floor portion is completed in the above-mentioned reverse striking method, an opening for excavation is formed in the first floor portion, and the underground is excavated from the opening for excavation by an evacuation device. And transported sediment to the ground.

[0004] As the above-mentioned excavating apparatus, for example, Japanese Patent Publication No. Sho 6
As disclosed in Japanese Unexamined Patent Publication No. 3-51211 and Japanese Unexamined Patent Application Publication No. 3-172418, a method is known in which a clamshell is raised and lowered to convey earth and sand excavated underground to the ground.

[0005]

With such a lifting device for raising and lowering the clamshell, it is necessary to transport the earth and sand transported to the ground by the clamshell to a hopper. It is movably provided over a sediment receiving position corresponding to the ascending / descending position and a standby position distant from the sediment receiving position, and the sediment conveyed to the ground by the clamshell is conveyed to the hopper by the belt conveyor.

[0006] However, in this case, since the heavy belt conveyor is moved, its structure becomes very complicated, and the clam shell may interfere with the belt conveyor and be damaged due to malfunction.

[0007] It is conceivable that the clamshell may be moved laterally with the clamshell raised, but the clamshell winds up and down the wire rope for opening and closing and the wire rope for opening and closing, and moves up, down, and opens and closes. As described above, when the clamshell is moved up while the clamshell is raised, the lifting wire rope and the opening / closing wire rope are pulled and loosened, and the clamshell moves up and down and opens and closes.

[0008] Therefore, an object of the present invention is to provide a lifting device capable of solving the above-mentioned problems.

[0009]

The climbing wire rope 9 and the opening / closing wire rope 10 of the clam shell 8 are wound around the traveling body 6 and are wound around the elevating drum 11 and the opening / closing drum 12 of the winch A. A first selector for connecting a moving wire rope 14 wound around a moving drum 13 of A to the traveling body 6 and rotating and fixing the elevating drum 11
A motor valve 33 _1, to rotate and fixed the opening and closing drum 12
₂ second selector valve 33, rotating the moving drum 13
- a third selector valve 33 ₃ to fix the first, second and
The third selector valve _{33 1,} 33 2, 33 ₃ switching control to
A controller 40, the controller 40 comprising:
The lifting drum 11 and the opening / closing drum 12 are rotated to close
Raising / lowering / opening / closing the ram shell 8 and moving it
The first, second, and third cells are fixed so that the drum 13 is fixed.
Kutaben _{33 1,} 33 2, 33 ₃ switching controlled, and move
While rotating the driving drum 13 and traveling the traveling body 6,
Rotating the lifting drum 11 and the opening / closing drum 12 for lifting
The wire rope 9 and the opening / closing wire rope 10 are pulled and loosened.
The first, second, and third selector valves 33 ₁ ,
33 _2, 33 ₃ and controls switch the Agetsuchi
apparatus.

[0010]

[Operation] The clamshell 8 can be moved up and down and moved in the horizontal direction, and the clamshell 8 does not move up and down, and does not open and close when the clamshell 8 moves in the horizontal direction. Therefore, the earth and sand excavated underground from the opening can be transported to the hopper only by the clam shell 8, and the structure becomes simple because there is no need to provide a belt conveyor as in the related art.
Further, the controller 40 controls the first, second, and third selector valves.
33 _{1, 33} 2, 33 ₃ the switching on of the clamshell 8
Ascent, descent, opening and closing, and traveling of the traveling body 6 can be performed automatically.
it can.

[0011]

[Embodiment] As shown in FIG. 1, an opening 2 is formed in a floor portion 1 on the first floor, and a hopper 3 is provided adjacent to the opening 2, and a hopper 3 is provided around the opening 2 and the hopper 3. A support frame 4 is provided, and a guide rail 5 is attached to the upper portion of the support frame 4 in the left-right direction. A traveling body 6 is provided along the guide rail 5 so as to be able to travel in the left-right direction, and a pulley 7 provided on the traveling body 6 is wound around a wire rope 9 for lifting and lowering a clam shell 8 and a wire rope 10 for opening and closing. These wire ropes are wound around a lifting drum 11 and a opening / closing drum 12 of a winch A, and both ends of a moving wire rope 14 wound around the moving drum 13 are provided at upper portions of a support frame 4. Are connected to both ends of the traveling body 6 in the traveling direction via pulleys 15.

As shown in FIG. 2, the winch A includes a hydraulic motor 20, a speed reducer 21, first, second, third gears 22, 23, 24, and an intermediate gear 25. The second, third, and second gears 22, 23, and 24 have the same number of teeth and rotate at the same rotational speed. The first gear 22 is connected to the lifting / lowering drum 11 by the first clutch / brake 26. A second gear 23 is connected to the opening / closing drum 12 by a second clutch / brake 27, and a third gear 24 is connected to the moving drum 13 by a third clutch / brake 28.

As shown in FIG. 3, the discharge pressure oil of the main hydraulic pump 30 is supplied to the hydraulic motor 20 by the main valve 31, and the discharge pressure oil of the auxiliary hydraulic pump 32 is supplied to the first, second and third selector valves 33 _1. , 33 ₂ , and 33 ₃ , the clutch cylinders 34 of the first, second, and third clutches and brakes 26, 27, and 28,
The main valve 31 is supplied to the brake cylinder 35, and the main valve 31 is switched from the neutral position a to the forward rotation position b and the reverse rotation position c by energizing the first and second solenoids 31a and 31b to rotate the hydraulic motor 20 forward and backward. Drive in reverse.

The first, second, and third selector valves 33 ₁ , 33 ₁ ,
33 _2, 33 ₃ is held in the working position d, the holding position e first solenoid 36a is energized, the second solenoid 36
When b is excited, it is switched to the free fall position f, and when it is at the work position d, the discharge pressure oil is supplied to the clutch cylinder 34 and the brake cylinder 35 to turn the clutch ON and the brake O
FF, and at the holding position e, the clutch cylinder 34,
The brake cylinder 35 is connected to the tank circuit 37 and the clutch is turned off and the brake is turned on.
In this case, the discharge pressure oil is supplied to the brake cylinder 35, the clutch cylinder 34 is connected to the tank circuit 37, and the clutch is turned off and the brake is turned off.

Each of the solenoids is controlled to be energized by a controller 40.
1, an operation signal is input, and a descending position detecting sensor 42, a discharging position detecting sensor 43, a height detecting sensor 44
Each signal is input from the controller, and the energization of each solenoid is controlled based on those signals.

The lowering position detecting sensor 42 detects that the clamshell 8 is located at a position facing the opening 2 in FIG. 1, and is a limit switch mounted on the rail 5 so as to face the traveling body 6, The unloading position detection sensor 43 detects that the clamshell 8 is at a position facing the hopper 3 in FIG.
Is a limit switch mounted opposite to the traveling body 6.

The height detecting sensor 44 detects that the clamshell 8 has reached a height position at which the clamshell 8 can move left and right in FIG. 1, and is mounted on a crane attached between the traveling body 5 and the clamshell 8. This is a conventionally known overwinding detection switch used.

Next, the operation will be described. When raising the clamshell 8. First solenoid 3 of main valve 31 from controller 40
By energizing 1a, the motor 20 is rotated forward to the normal rotation position b. Move the first and second selector valves 33 ₁ and 33 ₂ to the working position d.
The first and second clutches / brakes 26 and 27 are turned on and the brakes are turned off, and the lifting / lowering drum 11 and the opening / closing drum 12 are rotated forward to wind the lifting / lowering wire rope 9 and the opening / closing wire rope 10. As a result, the clamshell 8 rises while maintaining the closed state. At this time, by energizing the third first solenoid 36a of the selector valve 33 ₁ and holding position e, the clutch OF of the third clutch and brake 38
F. With the brake ON, the moving drum 13 is fixed and the moving wire rope 14 is fixed so that the traveling body 5 does not move.

When the clamshell 8 is closed. In the same manner as described above, the motor 20 is rotated forward, the opening / closing drum 12 is rotated forward with the clutch ON and the brake OFF of the second clutch / brake 27, the opening / closing wire rope 10 is wound, and the clam shell 8 is closed.

When lowering the clamshell 8 In the above-described state, the controller 40 energizes the second solenoid 31b of the main valve 31 to rotate the motor 20 in the reverse rotation position c. As a result, the lifting drum 11 and the opening / closing drum 12 are reversed, so that the clamshell 8
Descends.

When the clamshell 8 is opened. In the same manner as described above, the motor 20 is reversed, the clutch ON / OFF of the second clutch / brake 27 is turned off, the opening / closing drum 12 is reversed, and the opening / closing wire rope 10 is extended to open the clam shell 8. Since the clamshell opens naturally by its own weight, the opening and closing wire rope 14 may be unwound by its own weight with the opening and closing drum 13 being in a free rotation state. In this case, the second solenoid 36b of the second selector valve 33 ₂ is energized to the free fall position f and the clutch O of the second clutch / brake 27 is turned on.
FF, brake off.

When the clamshell 8 is moved to the left in FIG. Above the and to reverse the motor 30 in the same manner, the third clutch and brake 3 a third selector valve 33 ₃ as a working position d
8. Turn on the clutch and turn off the brake. As a result, the moving drum 13 reverses, the traveling body 6 moves leftward along the rail 5, and the clamshell 8 moves leftward. At this time, when the traveling body 6 moves to the left, the elevating wire rope 9 and the opening / closing wire rope 10 are pulled, and the clam shell 8 is raised and opened, so that the controller 40 controls the first and second selector valves 33 ₁ , 33 ₁ . 33 ₂ of the first and second solenoids 36a, clutch O of the first and second clutches and brakes 26, 27 as a working position d without energized 36b
N, the brake is turned off, the elevating drum 11 and the opening / closing drum 12 are reversed, and the elevating wire rope 9 and the opening / closing wire rope 10 are extended to prevent the clamshell 8 from being raised and opened.

When the clamshell 8 is moved rightward in FIG. Above is rotated forward the motor 30 in the same manner as, the third clutch and brake 2 of the third selector valve 33 ₃ as a working position l
The clutch of No. 8 is turned on and the brake is turned off. Thereby, the moving drum 13 rotates forward, the traveling body 6 moves rightward along the rail 5, and the clamshell 8 moves rightward. At this time, when the traveling body 6 moves to the right, the wire rope 9 for lifting and lowering and the wire rope 10 for opening and closing are loosened and the clam shell 8 is lowered and closed.
First and second solenoids 3 of second selector valves 33 ₁ and 33 ₂
6a and 36b are not energized and the first and second
The clutches and brakes 26 and 27 are turned on and the brakes are turned off, and the elevating / lowering drum 11 and the opening / closing drum 12 are rotated in the forward direction to raise and lower the wire rope 9 and the opening / closing wire rope 1.
Take up 0 to prevent the clamshell 8 from lowering and closing.

Next, the operation from the state where the clamshell 8 is lowered from the opening 2 to the underground will be described. When a start signal is output from the operating member 41 to the controller 40, the controller 40 outputs the above signal to move up the clamshell 8, and when the clamshell 8 reaches a height at which the clamshell 8 can be moved laterally, the height detection sensor 44 is turned on. The controller 44 outputs the above-mentioned signal in response to the ON signal of the height detection sensor 44 to move the traveling body 6 toward the hopper 3, and when the hopper 3 is located above the hopper 3, the discharge detection sensor 43 is turned ON, and the controller 40 opening the clamshell 8 closing drums 11 by driving the take-up as a working position d of the second selector valve 33 _2.

Thereafter, the controller 40 outputs the above-mentioned signal to move the clamshell 8 to the left. When the descending position detecting sensor 42 is turned on, the controller 40 outputs the above-mentioned signal to lower the clamshell 8.

[0026]

The clamshell 8 can be raised and lowered,
The clamshell 8 can be moved in the lateral direction, and when the clamshell 8 is moved in the lateral direction, the clamshell 8 does not move up, down, open or close. Therefore, the earth and sand excavated underground from the opening can be transported to the hopper only by the clam shell 8, and the structure becomes simple because there is no need to provide a belt conveyor as in the related art. Further, the controller 40 controls the first, second, and third selections.
Data valve _{33 1,} 33 2, 33 ₃ clam shell 8 by switching
Automatically move up, down, open and close, and run
Can be.

[Brief description of the drawings]

FIG. 1 is an overall front view showing an embodiment of the present invention.

FIG. 2 is a diagram illustrating the configuration of a winch.

FIG. 3 is a control circuit diagram.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... 1st floor part, 2 ... Opening, 3 ... Hopper, 4 ... Support frame, 5 ... Guide rail, 6 ... Running body, 8 ... Clamshell, 9 ... Lifting wire rope, 10 ... Opening / closing wire rope, 11: Drum for lifting and lowering, 12: Drum for opening and closing, 13 ...
Drum for movement, 14: wire rope for movement, A: winch.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shiro Taniguchi 1-18-22 Nishiki, Naka-ku, Nagoya-shi, Aichi Nagoya Branch, Takenaka Corporation (72) Inventor Kazuo Otsuka 3-Ueno Makino, Osaka Prefecture 1-1 Inside the Osaka Plant of Komatsu Manufacturing Co., Ltd. (72) Yoshimasa Tanaka 23 Satsuzucho, Komatsu-shi, Ishikawa Pref. Inside the Awazu Plant of Komatsu Ltd. (72) Inventor Hiroshi Shimizu 23 Satsutsucho, Komatsu-shi, Ishikawa Komatsu Co., Ltd. Inside the Awazu Plant (72) Inventor Katsura Hirosawa 2-3-6 Akasaka, Minato-ku, Tokyo Komatsu Ltd. Headquarters (56) References JP-A-49-135402 (JP, A) 33578 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02F 3/47 B66D 1/62 E02F 7/00

Claims (1)

(57) [Claims] 1. A climbing wire rope 9 of a clamshell 8 and an opening / closing wire rope 10 are wound around a traveling body 6 and are wound around a lifting drum 11 of a winch A and an opening / closing drum 12.
A first selector valve for connecting the moving wire rope 14 wound around the moving drum 13 of the winch A to the traveling body 6 to rotate and fix the elevating drum 11
33 _1, a second rotating and fixing the opening and closing drum 12
A selector valve 33 _2, rotating and solid the moving drum 13
A third selector valve 33 ₃ to a constant, said first, second and third
A switch for controlling the switching of the selector valves 33 ₁ , 33 ₂ , 33 ₃
A controller 40, the controller 40 controls the lifting / lowering drum 11,
The drum 12 is rotated to raise / lower the clamshell 8.
Open and close and fix the moving drum 13
The first, second, and third selector valves 33 ₁ , 33 ₂ , 33
₃ by switching and rotating the moving drum 13 to run.
While traveling along the row 6, the lifting drum 11 and the opening / closing
Rotate the ram 12 to move the wire rope 9 up and down,
First and second so that the rope 10 is not pulled or loosened.
· Third selector valve _{33 1,} 33 2, 33 ₃ switching control
A lifting device.