CN106429831B - Traction machine and top lifter using it - Google Patents

Abstract

The present invention provides a kind of traction machine that the traction machine to break down can be made to act without using special device, safely decline hoisted load.It is a kind of that hoist cable that being equipped with suspension hook is rolled to using hoisting motor/the traction machine of backrush characterized by comprising to detect the encoder of the revolving speed of above-mentioned hoisting motor；Apply the traction brake of braking to above-mentioned hoisting motor；Processing unit is controlled with the brake for controlling above-mentioned traction brake, above-mentioned brake control processing unit, based on the revolving speed of the hoisting motor detected by above-mentioned encoder, controls above-mentioned traction brake in the unloading mode that control unit breaks down.

Description

Traction machine and top lifter using it

technical field

The present invention relates to an unloading technique when a control part of a hoisting machine fails.

Background technology

The hoisting machine (hoist) moves up and down the load attached to the hook by raising and lowering the sling using a hoisting device including a motor. When the control part in the traction machine fails, the suspended load cannot be lifted and lowered, and the suspended load needs to be removed.

As a background art in this technical field, there is Japanese Patent Laid-Open No. 2006-273547 (Patent Document 1). In this publication, the following technique is described: "When the crane fails, the connector is connected to the branch lines from the main operation circuits of the hoisting motor/brake and the traveling motor/brake, which are taken out from the crane side controller and connected to the outside. A coupler for an operating device of a malfunctioning crane including an auxiliary operating circuit for controlling the hoisting and traveling of the crane, a power supply is supplied to the malfunctioning crane via the connecting circuit, and the malfunctioning crane can be re-operated through the operation panel for crane operation .” (see abstract).

In addition, there is Japanese Patent Laid-Open No. 10-316377 (Patent Document 2). In this publication, the following technology is described: "The brake shaft connected to the rotation shaft of the main motor is connected to the rotation shaft of the micro-speed motor via the clutch part and the micro-speed side speed reduction part, and when a failure occurs, the extension part provided on the rotation shaft is A handle is attached to forcibly rotate the rotary shaft against the braking torque of the brake part that brakes the rotary shaft.” (refer to the abstract).

prior art literature

Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 2006-273547

Patent Document 2: Japanese Patent Application Laid-Open No. 10-316377

SUMMARY OF THE INVENTION

The technical problem to be solved by the invention

When the control part of the hoisting machine fails, the lifting operation cannot be performed. If it is in the state of hanging cargo at the time of failure, it is dangerous to repair, so it is necessary to remove the hanging load.

In order to solve this problem, as a countermeasure when the control unit of the hoisting machine fails, for example, in Patent Document 1, a control panel that controls the crane is provided with a structure that can easily connect another control panel, and when the control panel fails, another control panel is connected. The control panel of the faulty crane moves.

In addition, in Patent Document 2, by providing a handle for manually rotating the rotating shaft of the motor, it is possible to unload by rotating the handle at the time of failure.

In order to operate the malfunctioning hoisting machine, in the above-mentioned Patent Document 1, it is necessary to provide a structure capable of easily connecting a separate control panel and to provide a separate control panel, and in the above-mentioned Patent Document 2, it is necessary to provide a mechanism for manually activating the motor. Handle for rotating shaft.

In addition, in either of the above-mentioned Patent Documents 1 and 2, in order to unload, an operator is required to ascend to the top of a factory in which a hoisting machine is installed.

It is an object of the present invention to provide a hoisting machine that can operate a malfunctioning hoisting machine without requiring a special device to safely remove a suspended load.

Technical solutions for solving technical problems

In order to solve the above-mentioned problems, for example, the structure described in the claims is adopted.

The present application includes a number of technical solutions that can solve the above-mentioned technical problems. One example is as follows, a hoisting machine for winding up/rewinding a sling mounted with a hook by a hoisting motor, which is characterized by comprising: An encoder for detecting the rotational speed of the traction motor; a traction brake for applying a brake to the traction motor; and a brake control processing unit for controlling the traction brake, the brake control processing unit in the unloading mode in which the control unit fails , the traction brake is controlled based on the rotational speed of the traction motor detected by the encoder.

Invention effect

According to the present invention, it is possible to provide a hoisting machine that can operate a malfunctioning hoisting machine without using a special device to safely remove a suspended load. In addition, there is no need for an operator to ascend to the top for operation in the event of a malfunction.

Problems, structures, and effects other than those described above will be made clearer by the description of the following embodiments.

Description of drawings

FIG. 1 is a perspective view showing the overall configuration of an inverter-type top lift apparatus according to an embodiment.

FIG. 2 is a block diagram showing the configuration of the main part of the inverter-type roof lifter according to the embodiment.

FIG. 3 is a block diagram showing the configuration of the unloading control of the embodiment.

FIG. 4 is a diagram showing a structure of brake control in the hoisting/travel inverter control unit of FIG. 3 .

FIG. 5 is an example of a flowchart showing an execution determination process of uninstall control.

FIG. 6 is a diagram showing an operation input device for performing the process of FIG. 5 .

FIG. 7 is a flowchart showing brake control processing at the time of unloading.

Description of reference numerals

1: hook

2: Sling

3: Traction induction motor

4: Traction device

5: Horizontal induction motor

6: Device for horizontal line

7: Truss for horizontal rows

8: Travel induction motor

9: Device for traveling

10: Travel trusses

11: Traction/traverse inverter device

12: Traction/traverse inverter control unit

13: Operating the input device

14: Inverter for traction

15: Inverter for horizontal row

16: Brakes for induction motors

17: Encoder

18: Inverter device for traveling

19: Travel inverter control section

20: Inverter for traveling

41: Brake control processing unit in normal mode

42: Brake control processing unit in unloading mode

43: Operation input detection processing unit

44: Normal/Uninstall Mode Switching Processing Section

Detailed ways

Embodiments of the present invention will be described below using the drawings.

FIG. 1 is a perspective view showing the overall structure of the inverter-type roof lifter of the present embodiment.

The inverter-type top lifting device includes a hook 1, a sling 2, a traction induction motor 3, a traction device 4, a traverse induction motor 5, a traverse device 6, a traverse truss 7, a traveling induction motor 8, and a traveling device. 9. The traveling truss 10 , the traction/travel inverter device (referred to as a main control unit.) 11 , the operation input device 13 , and the traveling inverter device 18 .

The inverter-type top lifting device uses the traction device 4 having the traction induction motor 3 to lift and lower the sling 2, thereby causing the cargo attached to the hook 1 to move in the Z direction (indicated by arrows in the Z direction and the −Z direction). .) That is, it moves up and down. In addition, the traverse induction motor 5 rotates in the X direction (indicated by arrows in the X direction and the −X direction) (horizontal direction), and moves the wheels in the traverse device 6 in the X direction along the traverse truss 7 . In addition, the traveling induction motor 8 rotates in the Y direction (indicated by arrows in the Y direction and −Y direction) (forward and backward direction), and the wheels in the traveling device 9 are moved in the Y direction along the traveling truss 10 .

FIG. 2 is a block diagram showing a configuration of a main part of an inverter-type roof lifter.

The hoisting induction motor 3 and the traverse induction motor 5 are controlled by the hoisting and traverse inverter control unit 12 housed in the hoisting and traverse inverter device 11 . That is, when the operator inputs a predetermined instruction from the operation input device 13, the hoisting/traveling inverter control unit 12 controls the hoisting inverter 14 and the traverse inverter 15, and the hoisting inverter 14 and the traverse inverter 15 The inverter 15 applies the frequency, voltage, and current required for control to the traction induction motor 3 and the traverse induction motor 5, and at the same time performs release control of the induction motor brake 16, so that, in the case of the traction device 4, it is installed in the The load of the hook 1 does not fall but moves in the Z direction. In addition, in the case of the horizontal running device 6 , the traction device 4 is moved in the X direction along the lateral running truss 7 .

In addition, the traction/travel inverter control unit 12 takes in the information of the encoder 17 that detects the rotational speed of the motor, and uses the information of the motor rotational speed for the control of the traction inverter 14 .

Similarly, when the traveling induction motor 8 attached to the traveling device 9 inputs a predetermined instruction from the operation input device 13, the traveling inverter control unit 19 housed in the traveling inverter device 18 controls the traveling inverter The inverter 20 applies the frequency, voltage, and current required for control of the traveling induction motor 8 from the traveling inverter 20, and simultaneously controls the release of the induction motor brake 16, so that the traction device 4 follows the traveling truss 10. Move in the Y direction.

The unloading structure when the control unit of the present embodiment fails will be described with reference to FIGS. 3 to 7 .

FIG. 3 is a block diagram showing an unloading control structure.

The traction/travel inverter control unit 12 is equipped with a microcomputer, and when an abnormality of the traction inverter 14, the traction motor 3, or the traction/travel inverter control unit 12 itself is detected, it shifts to the unloading mode. Here, the transition to the unloading mode is implemented by, for example, a clock interruption process of the microcomputer of the hoisting/traverse inverter control unit 12 .

FIG. 5 shows an example of a flowchart of the uninstall control execution determination process. In addition, FIG. 6 shows an example of the operation input device for transitioning to the unloading mode in the flow of FIG. 5 . The operation input device 13 is used to operate the top lifter, and includes an on-off button for turning on and off the power supply, a vertical button for moving a hook up and down, an east-west button and a north-south button for moving the hoisting machine. The flow of FIG. 5 is that, in the operation input device 13 of FIG. 6 , an up operation is performed and a power-off operation is performed, and then, when a power-on operation is performed, the transition to the unload mode is performed.

First, it is checked whether it is currently in the uninstall mode (S101), and if it is not the uninstall mode, the uninstall flag is checked (S102). Next, if the unloading flag is 0, it is checked whether the hoisting abnormality is being detected (S103), and if the abnormality is being detected, the vertical operation input is checked (S104). Next, if there is an up or down operation input, the power-off operation input is confirmed (S105), and if there is a power-off operation, the unload flag is set to 1 (S106). By setting the uninstall flag to 1 in the above-described order, when the uninstall flag is 1 ( S102 ), the power-on operation is confirmed ( S107 ), and if there is a power-on operation, it transitions to the uninstall mode ( S108 ).

Since it is possible to transition to the unloading mode in the above-mentioned procedure, when the operation is disabled due to the detection of a hoisting abnormality, the upper operation and the power-off operation can be performed, and then the power-on operation can be performed to switch to the unloading mode.

In FIG. 5 , the method of returning to the normal mode after uninstallation or the like is that when a power-off operation is detected during the uninstallation mode ( S109 ), the uninstallation mode is terminated and transition to the normal mode is performed ( S110 ).

In addition, in the examples of FIGS. 5 and 6 , it is configured to transition to the uninstall mode by a combination of specific operation buttons, but it may be set to a combination of other operation buttons, or it may be set to transition to the uninstall mode. dedicated operation buttons.

Here, whether or not to switch to the unloading mode can be confirmed by outputting the current operation mode from the hoisting/traverse inverter control unit 12, for example, by lighting a lamp, or by sounding a buzzer or the like.

After transitioning to the unloading mode, when a downward operation signal from the operation input device 13 is detected, the hoisting/travel inverter control unit 12 releases the brake 16 of the hoisting induction motor 3 to unload the suspended load. At this time, the hoisting/traversing inverter control unit 12 instructs the release/braking of the brake 16 so that the rotational speed of the hoisting induction motor 3 does not exceed a certain value.

FIG. 4 shows the structure of the brake control in the hoisting/traverse inverter control unit 12 of FIG. 3 . The brake control processing unit 41 in the normal mode and the brake control processing unit 42 in the unloading mode are provided. The operation input detection processing unit 43 detects the operation of the operation input device 13, and based on the operation input information of whether it is in the normal mode or in the unloading mode, it is determined by the normal operation. The /unloading mode switching processing unit 44 switches between the brake control processing unit 41 in the normal mode and the brake control processing unit 42 in the unloading mode. In addition, in the brake processing unit 41 in the normal mode, the hoisting brake 16 is controlled based on the hoisting inverter output frequency, and in the brake control processing unit 42 in the unloading mode, the hoisting brake is controlled on the basis of the hoisting motor rotational speed 16.

In FIG. 3 , when the traction brake 16 is released, the hook 1 falls downward due to the weight of the suspended load and its own weight. When the traction brake 16 is released, the rotational speed of the traction motor is confirmed based on a signal from the encoder 17 directly connected to the traction motor 3, and the traction brake 16 is released/braking so that the rotational speed does not exceed a certain value For example 500rpm. By implementing the brake control based on the rotational speed of the electric motor 3 for traction, the unloading can be performed at a safe speed.

In addition, in the example of FIG. 3, the rotation speed of the electric motor for traction is controlled so as not to exceed a certain value, but the brake may be continuously controlled so that the rotation speed of the electric motor for traction becomes a predetermined rotation speed.

FIG. 7 shows a flowchart of the brake control process at the time of unloading. FIG. 7 is a diagram showing unloading control when there is a down operation in the flow of FIG. 5 .

First, in step 201, it is determined whether or not it is in the unloading mode. In the case of the unloading mode, it is determined in step 202 whether there is a down operation, and if there is a down operation, the release control of the traction brake is performed in step 204. At this time, in step 203, when the rotational speed of the electric motor is, for example, 500 rpm or less, the release control of the traction brake is performed, but when it exceeds 500 rpm, the traction brake braking control in step 205 is performed.

In addition, in the case of the normal mode, normal brake control processing (opening and closing control) is performed in step 206 .

According to the present embodiment, when an abnormality is detected, that is, when the operation of the control unit cannot be performed, it is not necessary for the operator to ascend to the top to perform the operation. In addition, in the case of an ordinary inverter crane, the hoisting/traverse inverter control unit 12 and the encoder 17 are installed as standard, so that the hoisting machine that has failed can be operated without using a special device, so that it is possible to Safely lower the suspended load.

Claims (8)

1. the hoist cable for being equipped with suspension hook is rolled/backrush using hoisting motor by a kind of traction machine, the feature of the traction machine exists In, comprising:

Detect the encoder of the revolving speed of the hoisting motor；

Apply the traction brake of braking to the hoisting motor；With

The brake control processing unit of the traction brake is controlled,

Brake control processing unit has following two brake controls processing: the revolving speed based on the hoisting motor come Control the brake control processing of the unloading mode of the traction brake；With the output frequency control based on traction inverter The brake control of the normal mode of the traction brake is handled, according to the normal mode or unloading inputted from operation inputting part Mode switches described two brake control processing,

The brake controls processing unit in the unloading mode that control unit breaks down, and is in the revolving speed of the hoisting motor The traction brake is discharged when below egulation rotating speed, is draged when the revolving speed of the hoisting motor is more than egulation rotating speed to described Draw brake and applies braking.

2. traction machine according to claim 1, it is characterised in that:

The operation inputting part includes the on-off button of on-off for carrying out power supply, upper and lower pressing of making that suspension hook moves up and down Button, the thing button and north and south button for keeping traction machine mobile input normal mode and unloading by the combination operation of the button Mode.

3. traction machine according to claim 1, it is characterised in that:

When detecting the exception of the hoisting motor, traction inverter or traction inverter control unit to the unloading Mode shifts.

4. traction machine according to claim 1, it is characterised in that:

The hoisting motor carries out inverter control in normal mode.

5. traction machine according to claim 1, it is characterised in that:

With the mechanism for returning to usual operation mode from unloading mode.

6. traction machine according to claim 1, it is characterised in that:

Mechanism with the state for being output to the outside the operation modes such as unloading mode.

7. traction machine according to claim 6, it is characterised in that:

The mechanism for being output to the outside the state of the operation mode is lamp or alarm generation mechanism.

8. a kind of top lifting device, it is characterised in that:

Use traction machine described in any one of claim 1~7.