KR19990087846A - variable speed hoist gear - Google Patents

Abstract

It provides variable speed hoisting device that makes it easy to set high speed operation switching judgment standard after shipment.

Rotational speed detecting means 4 for detecting the rotational speed of the hoisting motor 2 controlled by the inverter 14 and a value corresponding to the rotational speed at the rated frequency operation with the allowable high speed operation by the operator The high speed operation switching judgment reference value 11a set and stored in the high speed operation switching judgment reference value 11a, the value 10a corresponding to the number of revolutions at the time of rated frequency operation with the actual load, and the high speed operation switching judgment reference value 11a. ) And the high speed operation switching judgment is made to "small" when the value 10a is larger than the high speed operation switching determination reference value 11a in the case of winding up, and the inverter 14 commands the high speed operation ( A high speed operation command means 13 for 13a is provided.

Description

Variable speed hoist gear

The present invention relates to a variable speed lifting device for switching the lifting and lowering speed in accordance with the load by controlling the lifting motor.

Conventional variable speed hoist of this kind is light load as shown in Japanese Patent Laid-Open No. 2-291393 and Japanese Patent Laid-Open No. 2-291394, for example. The corresponding value is stored in the microcomputer as a fixed value in advance as a high speed operation switching judgment reference value. When the motor is operated at the rated frequency and the winding speed is faster than the standard value in case of the winch, it is judged that the slipper is less and the light load when the speed is lower than this standard value, respectively. We do it automatically.

Conventional variable speed hoisting devices are switched to high speed operation as described above, but each user may hang a dedicated hanging tool on a hook and then hang a baggage on the dedicated hanging tool again.

In this case, it is hoped that the user can operate at the rated speed for safety only when the load is suspended at light load high speed faster than the rated speed if the user only has a dedicated hanging tool.

Therefore, in order to operate the desired weight of load (up to 25% of normal weight) at high speed, it is necessary to set the high speed operation switching reference value which is stored as a fixed value inside the microcomputer. It is necessary to measure slippery of the hoisting motor when running with this load afterwards, and it takes time because it requires decent work such as replacing and manufacturing a new board mounted with microcomputer that stores the reference value set by the measurement result. Had a problem.

In addition, there are fluctuations in power supply voltage and change in mechanical efficiency on the user's side, and even the dedicated suspension tool increases the slippage of the hoisting motor so that it is not possible to switch to light load high speed operation or the user changes the dedicated suspension tool. In one case, since the user cannot change the high speed operation switching judgment standard value, the manufacturer needs to manufacture and replace the board having changed the standard value, thus causing a large cost and time.

The present invention has been made to solve the above problems, and it is easy to set the high speed operation switching judgment reference value at each user side after shipment, and change the setting of the high speed operation switching determination reference value according to the load condition of the user-specific dedicated suspension tool. It is an object of the present invention to provide such a variable speed lifting device.

The variable speed hoisting device according to claim 1 corresponds to the rotational speed at the rated frequency operation with a high speed allowable load by the operation of the rotational speed detecting means for detecting the rotational speed of the hoisting motor controlled by the inverter and the operator. The value is set as the high speed operation switching determination reference value, and the high speed operation switching determination reference value setting means to be stored is compared with a value corresponding to the number of revolutions of the rated frequency operation at the actual load suspended load and the high speed operation switching determination reference value. In the case of "large" in the case of a lift than the operation switching judgment reference value, the high speed operation command means for making a high speed operation switching judgment to "small" and instructing a high speed operation to the inverter is provided.

In addition, the variable speed hoisting device according to claim 2 of the present invention is rated by the actual load corresponding to the allowable load for high speed operation by the operation of the rotational speed detecting means for detecting the rotational speed of the hoisting motor controlled by the inverter and the operator. High speed operation switching judgment reference value setting means for setting and storing the value corresponding to the rotational speed during frequency operation as the high speed operation switching judgment reference value and the value corresponding to the number of rotations during the rated frequency operation and the high speed operation switching with the actual load hanging weight The high speed operation command means for making a high speed operation switching decision to "small" in the case of "large" when the value is higher than the high speed operation switching determination reference value by comparing the judgment reference value is provided.

Further, the variable speed hoisting device according to claim 3 of the present invention has a rotational speed detecting means for detecting the rotational speed of the hoisting motor controlled by the inverter, and a constant frequency exceeding the rated frequency at the allowable load for high speed operation by the operator. The value corresponding to the rotational speed during light load high speed operation is set as the high speed operation cancellation judgment reference value, and the high speed operation cancellation judgment reference value setting means for storing and corresponding to the rotational speed during constant frequency operation with the actual load suspension load The high speed operation cancel command means for comparing the value with the high speed operation cancellation criterion value and making the high speed operation cancellation judgment as small or unloaded when the value is higher than the high speed operation cancellation determination reference value and giving the high speed operation cancellation command to the inverter. It is equipped.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the configuration of a variable speed hoist in accordance with Embodiment 1 of the present invention.

Fig. 2 is a block diagram showing the structure of a variable speed hoist in accordance with Embodiment 2 of the present invention;

3 is a block diagram showing the configuration of a variable speed hoisting device in Embodiment 3 of the present invention;

4 is a block diagram showing the configuration of a variable speed hoisting device in Embodiment 4 of the present invention;

Fig. 5 is a block diagram showing the structure of a variable speed hoist in accordance with Embodiment 5 of the present invention;

6 is a block diagram showing the configuration of a variable speed hoisting device in Embodiment 6 of the present invention;

7 is a block diagram showing the configuration of a variable speed hoisting device in Embodiment 7 of the present invention;

8 is a block diagram showing the configuration of a variable speed hoisting device in Embodiment 8 of the present invention;

<Explanation of symbols for the main parts of the drawings>

2: hoisting motor

4: Rotary encoder (rotation speed detection means)

10: rotation speed converting means 10a: output value

11,15: high speed operation switching judgment reference value setting means

11a, 15a: High speed operation switching judgment reference value setting means

12: interface 13: high speed operation command means

13a, 20a, 23a: high speed operation command 14: inverter

16, 22: reference value setting circuit 17, 18, 24, 25: reference value limiting circuit

19,21: means for setting the high speed operation cancellation judgment reference value

19a, 21a: High speed operation cancellation judgment standard

20, 23: High speed operation switching, high speed operation cancel command means

20b, 23b: High Speed Operation Cancel Command

Embodiment 1.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described according to drawing. 1 is a block diagram showing the configuration of a variable speed hoisting device according to Embodiment 1 of the present invention.

In the drawings, 1 is a frame, 2 is a hoisting motor, 3 is an electromagnetic brake, 4 is a rotary encoder as a rotational speed detecting means, 5 is a winding drum, 6 is a wire rope, 7 is a hanging hook, and 8 is a hanging hook ( A dedicated hanging tool 9 suspended in 7) is brake driving means for driving control of the electromagnetic brake 3.

10 is a rotational speed converting means for outputting an output value 10a corresponding to the rotational speed of the hoisting motor 2 detected by the rotary encoder 4, and 11 is an input of an interface 12 operated by an operator. The high-speed operation switching is performed by setting a value corresponding to the output value corresponding to the rotational speed of the hoisting motor at the rated frequency operation at the allowable high-speed operation load (typically up to 25% load) to the high-speed operation switching judgment reference value 11a. The judging reference value setting means 13 denotes the output value 10a output from the rotational speed converting means 10 and the high-speed operation switching judging reference value setting means 11 at the time of rated frequency operation under the actual load hanging load. Compared with the judgment reference value 11a, the output value 10a is judged to change the high-speed operation to "small" in the case of "large" in the case of "large" when the output value 10a is higher than the high speed operation switching judgment reference value 11a, To inverter 14 to control High speed operation command means for outputting the speed operation command 13a.

According to the variable speed hoisting apparatus of Embodiment 1 comprised as mentioned above, the output corresponding to the rotational speed of the hoisting motor 2 when the high speed operation allowable load previously measured by the same type of hoist was operated at the rated frequency 60Hz. Value is set as the high speed operation switching determination reference value 11a by the input of the interface 12 operated by the operator, inputted into the high speed operation switching determination reference value setting means 11, and stored therein. The high load operation determination criterion value 11a memorized in the output value 10a outputted from the rotational speed converting means 10 and the high speed operation switching determination reference value setting means 11 at this time is tested by driving the actual load suspended at 8 Hz. Are compared by the high-speed operation command means 13, and when the winding value is larger, the output value 10a is smaller in case of winding, and the output value 10a is smaller in case of winding, Since the high speed operation command 13a is output to the butter 14, the high speed operation switching judgment reference value 11a can be set and changed by the operation of the operator 12 according to the result of actual measurement by another hoist of the same type. As described above, troublesome work such as manufacturing a board is unnecessary according to individual test results of the shipment hoist, and further, work time can be shortened and cost can be reduced.

In addition, when the swing of the hoisting motor 2 increases due to the change in the mechanical efficiency of the power supply voltage on the user side, and the suspension load of the dedicated suspension tool 8 is not changed, the light load does not switch to the high speed operation. In addition, since it is easy to change and change the high speed operation switching determination reference value 11a on the user side, the replacement of the board is unnecessary and the setting change of the high speed operation switching determination reference value 11a can be changed within a short time.

In addition, even when the dedicated hanging tool 8 is changed to another hanging tool on the user side, the high speed operation switching judgment reference value is input by the input of the interface 12 operated by the operator even if the rotational speed of the lifting motor 2 is not measured. The setting of (11a) can be changed, and since the setting is repeated several times until it is actually operated to switch to the light load high speed operation, there is no need to manufacture and replace the board.

Embodiment 2.

Fig. 2 is a block diagram showing the configuration of a variable speed hoist in accordance with Embodiment 2 of the present invention.

In the drawings, the same parts as in the first embodiment are denoted by the same reference numerals and description thereof will be omitted. 15 is an output of the output of the rotational speed converting means 10 at the time of rated frequency operation by the actual suspension load corresponding to the allowable load of high speed operation (typically up to 25% load) by the input of the interface 12 operated by the operator. High speed operation switching determination reference value setting means for setting and storing the high speed operation switching determination reference value 15a from the value 10a through the reference value setting circuit 16.

According to the variable speed hoisting apparatus of Embodiment 1 comprised as mentioned above, the thread which corresponds to the dedicated hanging tool 8 which wants to make a high speed operation allowable load in a shipment test by the input of the interface 12 operated by an operator. The output value 10a corresponding to the rotational speed of the hoisting motor 2 when the hanging load is operated at the rated frequency is inputted into the high speed operation switching judgment reference value setting means 15, and through the reference value setting circuit 16. The high speed operation switching judgment reference value 15a is set and stored, and as shown in the first embodiment, the customer actually drives the actual hanging load suspended by the dedicated hanging tool 8 at 60 Hz. When the output value 10a output from 10) and the high speed operation switching determination reference value 15a stored in the high speed operation switching determination reference value setting means 15 are compared with the high speed operation command means 13, In the case where the output value 10a side is larger and the winding value is smaller, the output value 10a side is judged to be light load, and the high speed operation command 13a is output to the inverter 14. Not only can the same effect be obtained, but also in the pre-shipment test, for example, the suspension speed of the hoisting motor 2 detected at this time is carried out by suspending the load to be operated at light load high speed, such as the dedicated suspension tool 8. Since a value corresponding to the corresponding output value 10a is automatically set and stored in the high speed operation switching determination reference value 15a, the work time can be further shortened.

Embodiment 3.

3 is a block diagram showing the configuration of a variable speed hoisting device in Embodiment 3 of the present invention.

In the drawings, the same parts as in the first embodiment are denoted by the same reference numerals and description thereof will be omitted. Reference numeral 17 denotes a reference value limiting circuit having a function of restricting the high speed operation switching determination reference value 11a set by the high speed operation switching determination reference value setting means 11 to more than a predetermined value in the case of a winch and below a predetermined value in the case of a winch. to be.

As described above, according to the third embodiment, the reference value limiting circuit 17 restricts the high speed operation switching judgment reference value 11a to more than a predetermined value in the case of a winding, and to below a predetermined value in the case of a winding. It is possible to prevent the operation exceeding the electrical and mechanical loads allowed by the light load high speed operation by setting the high speed operation switching judgment reference value 11a corresponding to an excessive slip by causing an error in the input of the interface 12. Stability improvement can be aimed at.

Embodiment 4.

4 is a block diagram showing the configuration of a variable speed hoisting device in Embodiment 4 of the present invention.

In the drawings, the same parts as in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 18 is a reference value limiting circuit having a function of limiting the high speed operation switching determination reference value 15a set by the high speed operation switching determination reference value setting means 15 to a predetermined value or more in the case of a winding and to a predetermined value or less in the case of a winding. to be.

As described above, according to the fourth embodiment, the reference value control circuit 18 restricts the high speed operation switching judgment reference value 15a to more than a predetermined value in the case of a winding and to a predetermined value or less in the case of a winding. By mistake, even if a load exceeding the electrical and mechanical weight allowed by light load high speed operation is carried out, the high speed operation switching threshold value 15a corresponding to excessive slippage is not set automatically, and the dangerous value exceeding the allowable load is not set automatically. High speed operation can be prevented under load and stability can be improved.

Embodiment 5.

Fig. 5 is a block diagram showing the structure of a variable speed hoist in accordance with Embodiment 5 of the present invention.

In the drawings, the same parts as in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. 19 denotes a value corresponding to the output value corresponding to the rotational speed of the hoisting motor during a high speed light load at a constant frequency exceeding the rated frequency by the input of the interface 12 operated by the operator. It is a high speed operation cancellation judgment reference value setting means for setting and storing the operation cancellation judgment reference value 19a.

20 is the same as that of the high speed operation command means 13 according to the first embodiment, and outputs the high speed operation command 20a while rotating speed converting means 10 at the time of constant frequency operation exceeding the rated frequency by the actual running load. The output value 10a is higher than the high speed operation cancellation judgment reference value 19a compared with the output value 10a outputted from the high speed operation cancellation judgment reference value 19a stored in the high speed operation cancellation judgment reference value setting means 19. Is the high speed operation high speed operation cancel command means for judging the high speed operation cancellation and outputting the high speed operation cancellation command 20b to the inverter 14 as it is.

According to the variable speed lifting device according to the fifth embodiment configured as described above, the rotational speed of the hoisting motor during light load high speed operation at a constant frequency exceeding the rated frequency by the allowable high speed operation load previously measured by another type of hoist. The value corresponding to the output value corresponding to the high speed operation cancellation judgment reference value setting means 19a is set by the input of the interface 12 operated by the operator, and is input to the high speed operation cancellation judgment reference value setting means 19 for storage. The high speed operation cancellation judgment reference value stored in the output value 10a outputted from the rotational speed converting means 10 and the high speed operation cancel determination reference value setting means 19 during the constant frequency operation exceeding the rated frequency by the actual suspension load. Comparing (19a), when the output value 10a is smaller than the high speed operation cancellation judgment reference value 19a, when it is small and unloaded, it cancels the high speed operation, ie, light load. If it is determined that it is not, the inverter 14 outputs the high speed operation cancel command 20b. For example, if the sling wire rope is loose during the light load high speed operation, the load starts to hang or the bag is put in the hanging box. Therefore, even if the load changes, it is judged that it is not a light load immediately and the high speed operation can be canceled and the safety can be improved.

Embodiment 6.

Fig. 6 is a block diagram showing the structure of a variable speed hoist in accordance with a sixth embodiment of the present invention.

In the drawings, the same parts as in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted. 21 is outputted from the rotational speed converting means 10 during light load high speed operation of a constant frequency exceeding the rated frequency by the actual running load corresponding to the allowable load for high speed operation by the input of the interface 12 operated by the operator. It is a high speed operation cancellation determination reference value setting means for setting and storing the high speed operation cancellation determination reference value 21a from the output value 10a through the reference value setting circuit 22.

23 outputs the high speed operation command 23a in the same manner as the high speed operation command means 13 in the second embodiment and at the same time the rotational speed converting means 10 at the time of constant frequency operation exceeding the rated frequency by the actual hanging load. The output value 10a is compared with the high speed operation cancellation determination reference value 21a by comparing the output value 10a outputted from the high speed operation cancellation determination reference value 21a stored in the high speed operation cancellation determination reference value setting means 21. In this case, the high speed operation cancellation command means outputs the high speed operation cancellation command 23b to the inverter 14 by determining the high speed operation cancellation as it is.

According to the variable speed hoisting apparatus of Embodiment 6 comprised as mentioned above, the actual suspension load equivalent to the dedicated suspension mechanism 8 which wants to make a high speed operation allowable load in shipment test of the fixed frequency exceeding a suspension rated frequency is carried out. The high speed operation cancel determination reference value 21a is transferred from the output value 10a output from the rotational speed converting means 10 to the high speed operation cancellation determination reference value setting means 21 during light load high speed operation. To the output value 10a outputted from the rotational speed converting means 10 and the high speed operation cancel determination reference value setting means 21 during constant frequency operation by the customer exceeding the rated frequency by setting and storing the memory. Compared with the stored high speed operation cancellation judgment reference value 21a, the output value 10a is smaller than the high speed operation cancellation judgment reference value 21a in the case of the lift, and can be the high speed operation as soon as it is the lowering. Since the high-speed operation cancel command 23b is output to the inverter 14 by judgment, the same effect as in the fifth embodiment is obtained, and in the test before shipment, for example, the neck portion like the dedicated hanging tool 8 can be obtained. When the load that you want to perform the high speed operation is suspended, the value corresponding to the output value 10a corresponding to the rotational speed of the hoisting motor 2 detected at this time is automatically set and stored as the high speed operation cancellation judgment reference value 10a. Therefore, work time can be shortened further.

Embodiment 7.

Fig. 7 is a block diagram showing the structure of a variable speed hoist in accordance with a seventh embodiment of the present invention.

In the drawings, the same parts as in the third and fifth embodiments are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 24 denotes a reference value limit having a function of restricting the high speed operation cancellation judgment reference value 19a set by the high speed operation cancellation judgment reference value setting means 19 to a predetermined value or more in the case of a winding and to a predetermined value or less in the case of a winding. Circuit.

As described above, according to the seventh embodiment, the reference value limiting circuit 24 restricts the high speed operation cancellation judgment reference value 19a to more than the predetermined value in the case of the winding and to the predetermined value or less in the case of the winding. Light load high speed operation even if the operation of exceeding the electrically and mechanically acceptable load by setting the high speed operation cancellation criterion value 19a corresponding to an excessive sliding by mistake of the input of the interface 12 to be operated is performed. Operation can be prevented from continuing without being canceled, and safety can be improved.

Embodiment 8.

Fig. 8 is a block diagram showing the structure of a variable speed hoist in accordance with Embodiment 8 of the present invention.

In the drawings, the same parts as in the fourth and sixth embodiments will be denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 25 denotes a reference value limit having a function of restricting the high speed operation cancellation judgment reference value 21a set by the high speed operation cancellation judgment reference value setting means 21 to a predetermined value or more in the case of a winding and to a predetermined value or less in the case of a winding. Circuit.

As described above, according to the eighth embodiment, the reference value limiting circuit 25 restricts the high speed operation cancellation judgment reference value 21a to more than a predetermined value in the case of a winding and to a predetermined value or less in the case of a winding. By setting the input of the interface 12 operated by mistake, the high speed operation cancellation judgment reference value 21a corresponding to the excessive sliding is set, and even if the operation exceeding the load that is electrically and mechanically allowed by the light load high speed operation is performed. It is possible to prevent the high speed operation from being canceled and to continue the operation, thereby improving the safety.

As described above, according to claim 1 of the present invention, the rotational speed detecting means for detecting the rotational speed of the hoisting motor controlled by the inverter, and the speed corresponding to the rotational speed at the rated frequency operation with the allowable high-speed operation load by the operator's operation. The high speed operation is determined by comparing the high speed operation switching judgment reference value setting means for setting and storing the value as the high speed operation switching judgment reference value, and the value corresponding to the number of revolutions of the rated frequency operation at the actual load suspended load and the high speed operation switching judgment reference value. It is easy to set the high speed operation switching threshold value for each consumer after shipment, since the inverter is equipped with a high speed operation command means for making a high speed operation switching judgment and giving the high speed operation command to the inverter in the case of a lift in case of a lift or a lower than the switching determination threshold value. It is possible to provide a variable speed lifting device.

In addition, according to claim 2, the present invention relates to a rotational speed detecting means for detecting a rotational speed of a hoisting motor controlled by an inverter, and at the time of rated frequency operation at a actual hanging weight corresponding to a high-speed driving allowable load by an operator. Means for setting the high speed operation switching judgment value for setting and storing a value corresponding to the rotational speed of the motor as the high speed operation switching judgment reference value, a value corresponding to the number of revolutions at the rated frequency operation under the actual load suspended load, and a high speed operation switching judgment reference value. If the above value is higher than the high speed operation switching criterion value, the high speed operation command means for making the high speed operation switching decision and the high speed operation command is issued to the inverter when it is lower than the high speed operation is changed. It is possible to provide a variable speed hoisting device which makes it easy to set a judgment reference value.

Further, according to claim 3 of the present invention, the light load high speed at a predetermined frequency exceeding the rated frequency by the rotation speed detection means for detecting the rotation speed of the hoisting motor controlled by the inverter, and the operation allowable by the operator. High speed operation cancel determination reference value setting means for setting and storing the value corresponding to the rotational speed at the time of operation as the high speed operation cancellation judgment reference value, and a value corresponding to the number of revolutions at the constant frequency operation and the high speed operation cancellation with the actual load suspension load. Compared with the reference value, if the above value is higher than the high speed operation threshold, the high speed operation cancellation command means for making the high speed operation cancellation judgment and giving the high speed operation cancellation command to the inverter as soon as it is low or unloaded is switched. Variable speed lifting to improve safety as well as easy setting of judgment standard value It can provide value.

Claims (3)

The rotation speed detection means for detecting the rotation speed of the hoisting motor controlled by the inverter and the value corresponding to the rotation speed at the rated frequency operation with the allowable high speed operation load by the operator's operation are set and stored as the high speed operation switching judgment reference value. The high speed operation switching determination reference value setting means and the value corresponding to the rotational speed at the rated frequency operation with the actual load hanging load are compared with the high speed operation switching determination reference value, and the value is higher than the high speed operation switching determination reference value. And a high speed operation command means for instructing the high speed operation to switch to the high speed operation in the case of large or unloaded and instructing the high speed operation to the inverter. Rotation speed detecting means for detecting the rotational speed of the hoisting motor controlled by the inverter, and a value corresponding to the rotational speed at the rated frequency operation with the actual suspension load corresponding to the allowable high-speed operation by the operator's operation. The high speed operation switching judgment reference value setting means which is set and stored as an operation switching judgment reference value, and the value corresponding to the number of revolutions at the time of rated frequency operation at actual load suspension load are compared with the high speed operation switching judgment reference value, and the value is the high speed operation switching. And a high speed operation command means for making a high speed operation switching decision to give a high speed operation command to the inverter when the winding is larger than the judgment reference value and the high speed operation is switched in the case of a winding. Rotational speed detecting means for detecting the rotational speed of the hoisting motor controlled by the inverter, and a value corresponding to the rotational speed during light load high-speed operation at a constant frequency exceeding the rated frequency with the allowable high-speed operation load by the operator's operation. Means for setting the high speed operation cancellation judgment reference value and storing the same as the high speed operation cancellation judgment reference value; and a value corresponding to the rotational speed during the constant frequency operation at the actual load suspension load and the high speed operation cancellation judgment reference value. And a high speed operation cancel command means for making a high speed operation cancellation decision and instructing the inverter to command a high speed operation cancel as soon as it is smaller or lower than the high speed operation cancellation judgment reference value.