JP3055074B2 - 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 lift device applied to a construction lift, an elevator or the like in the civil engineering and construction fields.

[0002]

2. Description of the Related Art As shown in FIG. 5, a lift device for a construction lift, an elevator or the like is provided on a building 12 with a support member 1.
A mast 1 supported by the mast 1, a carrier 2 disposed on the front surface of the mast 1 so as to be able to move up and down, a carriage lotus 3 for hanging and supporting the carrier 2, and a mast 1 which is arranged to be able to move up and down inside the mast 1. A counter weight 4 for suspending and supporting the counter weight 4, a winch 7 and the like.
The wire 8 is suspended from the carriage 2, the carriage lottery 3 and the counterweight 4 via 0 and 11, and the wire 8 is driven by a winch 7 for driving.
, So that the transporter 2 is moved up and down by taking up or sending out.

When the load is stopped by stopping the transporter 2 at a predetermined position, the wire expands and contracts due to a change in the load of the transporter 2 and the transporter 2 moves up and down to an unstable state. , A mast 1 is gripped by the gripping device, and the transporter 2 is fixed to the mast 1 before loading and unloading work.

[0004]

However, in the above-mentioned conventional lift device, when the transporter that has been lifted and lowered with the load loaded thereon is landed, and the transporter is fixed to the mast by the gripping device and the load is lowered, the work is not performed. When the gripping device is released to raise and lower the transporter afterwards, the wire shrinks by the weight of the loaded load and the transporter is pulled up sharply,
There is a problem that it is dangerous and the durability of the wire is reduced. In addition, when the transporter that has been lifted and lowered in an empty state has landed, the transporter is fixed to the mast by the gripping device, and the load is loaded, when the work is completed and then the gripper is released for lifting and lowering the transporter, the pile is loaded. The extra wire is extended by the weight of the load, and the transporter drops abruptly, causing a problem such as collapse of the load, which is dangerous. In particular, in the case of a lift for a super-high-rise building, since the wire is long, the expansion and contraction of the wire is correspondingly increased, and the risk is increased.

The present invention has been made to solve the above-mentioned problem, and a lift device capable of preventing a sudden rise and fall of a carrier and improving safety when the loading / unloading operation is completed and the carrier is started. The purpose is to provide.

[0006]

For this purpose, a lift device according to the present invention comprises a carrier 2 disposed on the front surface of a mast 1 so as to be able to move up and down, a driving winch 7 for moving the carrier 2 up and down by a wire 8, and a carrier 2. And a load detector 16 provided between the loading platform 2a and the gripping device 15 and attached to the lower portion of the loading platform 2a. 2 detects the increment or decrement of the load when the fixed mast 1, after winding the wire 8 or feed was Tsu line by driving winch 7 to eliminate the increment or decrement of the load, to release the gripping device 15
Characterized in that that. The numbers added to the above configuration are for comparison with the drawings for easy understanding, and do not limit the configuration of the present invention at all.

[0007]

In the present invention, for example, as shown in FIG.
When the driving winch 7 is operated to stop the transporter 2 at a predetermined position, the gripper 15 is driven to fix the transporter 2 to the mast 1, and when a load is loaded on the transporter 2, the increased amount is reduced. After the limit switch S1 detects and the wire 8 is wound by the drive winch 7 until the limit switch S1 is turned off, the drive winch 7 is stopped and the gripping device 15 is released. If the switch is lowered, the limit switch S2 detects the decrease and the wire 8 is turned off until the limit switch S2 is turned off.
, The driving winch 7 is stopped and the gripping device 15 is released. Therefore, when the driving winch 7 is started, there is no expansion and contraction of the wire 8 and smooth lifting and lowering is possible.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a lift holding device according to the present invention. FIG. A is a front view, and FIG. B is a side view.

The overall structure of the lift is similar to that of FIG.
On the front surface of the mast 1, a transporter 2 is disposed so as to be able to move up and down. A roller 9 is fixed to the upper part of the transporter 2, and a wire 8 wound or fed by a driving winch 7 is suspended on the roller 9. I have. Two gripping devices 15 are attached to the left and right of the lower part of the carrier 2a of the transporter 2. The gripping device 15 is driven by a driving source such as a hydraulic pressure, and the leading end of the gripping device 15 grips the guide rail 1a of the mast 1, thereby fixing the transporter 2 to the mast 1 and moving the transporter 2 by expansion and contraction of the wire 8. To prevent the vertical movement.
A load detector 16 is provided between the loading platform 2a and the gripping device 15, and can detect an increase or decrease in the load of the transporter 2 suspended by the wire 8 when the transporter 2 is fixed to the mast 1. It is configured as follows. In this embodiment, the load detectors 16 are provided at two locations on the left and right, but may be provided at any one location.

FIG. 2 is a partially enlarged cross-sectional view of FIG. 1. Arms 16 and 17 are fixed to the carrier 2 a and the gripping device 15, and the arms 16 and 17 are rotatably arranged via a pivot 19. A load detector 16 is provided between the loading platform 2a and the gripping device 15 arm. In addition, the gripping device 15
It comprises a grip 15a for gripping the mast 1 and a hydraulic cylinder 15b for operating the grip 15a.

FIG. 3 is a conceptual view showing an example of the load detector 16, which includes a spring 16a provided between the carrier 2a and the gripping device 15, and an operation lever 16b provided at an intermediate portion of the spring 16a. And limit switches S1 and S2 disposed above and below the operating lever 16b. Figure A
Shows a state where the carrier 2a is fixed to the mast 1 by the gripping device 15, and the operating lever 16b is at a position where the upper and lower limit switches S1 and S2 are not operated. FIG. B shows a case where a load is loaded on the loading platform 2a,
a is retracted and the limit switch S is operated by the operating lever 16b.
1 is operated to detect an increase in the load.
FIG. C shows a case where the load on the loading platform 2a is unloaded,
The spring 16a is extended and the limit switch S2 is operated by the operation lever 16b to detect the decrease in the load.

The operation of the present invention having the above configuration will be described with reference to FIG. In step 21, the drive winch 7 is operated to stop the transporter 2 at a predetermined position. In step 22, the gripping device 15 is driven to fix the transporter 2 to the mast 1. In this state, the transporter 2 is suspended by the wire 8, and the limit switches S1 and S2 are off as shown in FIG. 2A. Next, in step 23, it is determined whether the limit switches S1 and S2 are on. When the limit switch S1 is ON, that is, as shown in FIG. 2B, when a load is loaded on the transporter 2, when the gripping device 15 is released in this state, the wire 8 extends by the loaded amount and the transporter 2 is moved. Drops sharply. Then, after the wire 8 is wound by the driving winch 7 until the limit switch S1 is turned off in steps 24 and 25, the driving winch 7 is stopped in step 26. Thereafter, if the transporter 2 is to be moved up and down, step 2
When the gripping device 15 is released in step 7 and the driving winch 7 is started in step 28, the wire 8 can be smoothly moved up and down without extending.

Conversely, when the limit switch S2 is turned on in step 23, that is, as shown in FIG.
When the load is unloaded from the transporter 2, the holding device 1
When the wire 5 is released, the wire 8 shrinks by the amount of unloading and the transporter 2 rises rapidly. Therefore, step 2
At steps 9 and 30, after the wire 8 is sent out by the driving winch 7 until the limit switch S2 is turned off, the driving winch 7 is stopped at step 26. afterwards,
When the transporter 2 is moved up and down, the gripping device 15 is released, and the driving winch 7 is started.
Can be smoothly moved up and down without shrinking.

If it is determined in step 23 that the limit switches S1 and S2 are off, the process proceeds to step 27, and if the transporter 2 is moved up and down, the gripping device 15 is released.
The driving winch 7 is started.

[0015]

As is apparent from the above description, according to the present invention, a transporter is provided on the front of the mast so as to be able to move up and down.
A driving winch for raising and lowering the transporter by a wire,
A gripping device attached to a lower portion of the carrier of the transporter and capable of gripping the mast; and a load detector provided between the carrier and the gripper, wherein the load detector is configured to mast the transporter by the gripper. detecting an increase or decrease amount of the load when the fixed winding or feeding of the wire was Tsu line by the drive winch so as to eliminate the increment or decrement of the load
Thereafter, in order to release the gripping device , when the loading / unloading operation is completed and the transporter is started, it is possible to prevent sudden rise and fall of the transporter and improve safety.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a lift holding device of the present invention,
Figure A is a front view, Figure B is a side view

FIG. 2 is a partially enlarged sectional view of FIG. 1;

FIG. 3 is a conceptual diagram showing an example of a load detector according to the present invention.

FIG. 4 is a flowchart for explaining the operation of the present invention.

FIG. 5 is a view for explaining a conventional lift, in which FIG. A is a front view, and FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mast, 2 ... Carrier, 2a ... Carrier, 7 ... Driving winch, 8 ... Wire 15 ... Gripping device, 16 ... Load detector

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsutomu Kato 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Ryuichi Yanagi 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu (72) Inventor Koji Yoshida 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Yoshitada Koshihara 1-7-20 Hanazono Minami, Nishinari-ku, Osaka-shi, Osaka No. Koshihara Co., Ltd. (56) References JP-A-2-75590 (JP, A) JP-A-60-40386 (JP, A) JP-A-3-26673 (JP, A) (58) Fields surveyed ( Int.Cl. ⁷ , DB name) B66B 1/00-9/193

Claims (1)

(57) [Claims] 1. A carrier mounted on a front surface of a mast so as to be able to move up and down, a driving winch for moving the carrier up and down by a wire, and a gripping device attached to a lower portion of a carrier of the carrier to enable the mast to be gripped. A load detector provided between the carrier and the gripping device, the load detector detects an increase or decrease in the load when the carrier is fixed to the mast by the gripping device, and detects the increase or decrease in the load. The drive winch winds or unwinds the wire so as to eliminate it.
A lifting device for releasing the gripping device after the lifting.