JP2001322795A - Method and device for hoisting transportation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hoisting transport device capable of performing the position adjustment of a lifting magnet device automatically. SOLUTION: The hoisting transport device to transport a magnetic piece 14 is composed of magnets 12a and 12b to attract the magnetic piece 14 using magnetic force, moving devices 2a, 2b, 4 having a motor 17 and moving the magnets in hung-down condition, and a control part 18, wherein the control part 18 is equipped with a monitoring means 19 to monitor the load applied on the motor 17 and control means 20 and 21 to control the motion so that the load on the motor 17 decreases when load on the motor 17 is detected to be increased by the obstructive motions of the magnets 12a and 12b in the first direction in the condition that the moving devices 2a, 2b, 4 are moving the magnets in the horizontal first direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspended transport device for transporting a magnetic material and a transport method thereof.

[0002]

2. Description of the Related Art A lifting magnet type crane (hereinafter referred to as a "lift mag crane"), which is a kind of a hanging conveyance device, is used for conveying steel materials and the like.

FIG. 8 and FIG. 9 show a configuration of a conventional lift mag crane. FIG. 8 shows a front view of a conventional riff mag crane, and FIG. 9 shows a left side view thereof.

[0004] Riff mag crane 100 according to the prior art
Is equipped with both a traveling crane and a trolley.

[0005] The traveling crane comprises a pair of main girders 101a, 10a.
1b. Assuming that the vertical direction is the Z-axis direction, the pair of main beams 101a and 101b are provided on a plane perpendicular to the Z-axis direction. Also, the pair of main girders 101a, 101
b extends in the same direction (the X-axis direction). Here, the direction in which the pair of main beams 101a and 101b face each other is defined as a Y-axis direction. A guide rail 10 is provided on the upper surface of the main girder 101a.
2a is provided. A lift mag crane 102b is provided on the upper surface of the main girder 101b.

The trolley 103 includes guide rails 102a, 1
02b, and is movable in the X-axis direction.
The trolley 103 is supported by a pair of main beams 101a and 101b via guide rails 102a and 102b.

The guide column 104 is fixed to the trolley 103, and penetrates the center of the trolley 103 in the Z-axis direction. The inside of the guide column 104 is hollow.

[0008] The mast 105 passes through the hollow portion of the guide column 104 in the Z-axis direction.

The suspension beam 106 is connected to the mast 105 at the lower end of the mast 105.

The trolley 103 has a pair of hoisting drums 107a and 107b fixed thereto. Trolley 1
03 is a hoisting rope 108a wound on the hoisting drum 107a via a sheave 109a and a hoisting rope 108b wound on the hoisting drum 107b.
The suspension beam 106 is suspended via a sheave 109b. The suspension beam 106 is made of a member having a predetermined length, and its length direction extends substantially in a direction perpendicular to the Z-axis direction. In particular, the length direction of the suspension beam 106 is Y
It is desirable to extend in the axial direction.

The lifting magnet device 111a (or the lifting magnet device) is suspended at one end of the suspension beam 106 by a chain group 110a composed of several chains. Each chain of the chain group 110a is connected to four symmetrical corners of the rif mag device 111a. The rif mag device 111b is suspended from the other end of the suspension beam 106 by a chain group 110b composed of four chains. Each chain of the chain group 110b is connected to four symmetrical corners of the rif mag device 111b.

Next, referring to FIG. 9, a method of transporting a steel material of a conventional rif mag crane 100 will be described.

As shown in FIG. 9, in this method of transporting steel materials, it is assumed that the steel material 112 is accumulated on the steel material stand 114 and between the guide posts 113.

First, the operation of the lift mag crane 100 to lift a steel material to transport the steel material will be described below. The lift mag crane 100 moves the suspension beam 106 above the steel placing table 114. After the suspension beam 106 stops above the steel placing table 114, it descends and lifts the lifting magnet devices 111a, 111b.
Land between 3 Lifting magnet device 11
1a and 111b are steel materials 1 between the guide posts 113.
12 is supported by a magnetic force, and the steel material 112 is lifted by moving the suspension beam 106 upward.

Next, the operation of the rif mag crane 100 for disposing the steel material between the guide posts 113 will be described below. Rif mag crane 10 having lifting magnet devices 111a and 111b supporting steel 112 with magnetic force
0 moves the suspension beam 106 above the steel placing table 114. The suspension beam 106 stops above the steel table 114 and then descends to lift the lifting magnet device 1.
The floors 11a and 111b are landed between the guide posts 113. Next, the lifting magnet devices 111a, 11
1b releases the steel material 112 by adjusting the magnetic force.

In the method of transporting steel material described above, manual operation is performed to lift the lifting magnet devices 111a and 111b in accordance with the position where the steel material 112 is placed by lifting the steel material.

In the case where the above-described method of transporting steel material is performed automatically, the lifting magnet device 111a,
When landing 11b on the steel material 112, there remains an error in adjusting the position where the lifting magnet devices 111a and 111b are landed to the position where the steel material 112 is placed.
1b is likely to cause a position error when landing. Due to the influence of the position error, the lift mag crane 100
There has been a problem that multi-stacking of 2 cannot be performed accurately.

There is a need for a suspended transport apparatus that reduces positional errors during landing.

[0019]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a suspended transfer device and a transfer method for automatically adjusting the position of a lift mag device.

It is another object of the present invention to provide a suspended transport apparatus and a transport method thereof that can easily perform multi-stage stacking of transported articles.

It is a further object of the present invention to provide a suspended transfer apparatus and a transfer method thereof, which can easily perform multi-stage stacking of conveyed articles under automatic operation.

[0022]

Means for solving the problem are described as follows. The technical matters corresponding to the claims in the expression are appended with numbers, symbols, etc. in parentheses (). The numbers, symbols, etc. clarify the correspondence / correspondence between the technical matters corresponding to the claims and at least one of the plural / forms of implementation.
It is not intended to show that the technical matters corresponding to the claims are limited to the technical matters of the embodiment.

According to the present invention, in order to solve the above-mentioned problem, there is provided a hanging transfer device for transferring a magnetic material (14), wherein the magnet (14) can attract the magnetic material (14) using a magnetic force. 12a, 12b), a moving device (2a, 2b, 4) having a motor (17) for suspending and moving the magnet, and a control unit (18), and the control unit (18) Monitoring means (19) for monitoring the load applied to the motor (17), and moving devices (2a, 2b, 4)
A motor (17) generated by obstructing movement of the magnets (12a, 12b) in the first direction while the magnet is moving in the first horizontal direction;
And a control means (20, 21) for controlling the movement of the motor so as to reduce the load on the motor (17) when an increase in the load on the motor (17) is detected.

In the above-mentioned hanging transfer device, when the control means (20, 21) detects an increase in the load on the motor (17), the moving device (2a) reduces the load on the motor (17). , 2b, 4) can be moved in a direction opposite to the first direction.

In the above-mentioned hanging transfer device, when the control means (20, 21) detects an increase in the load on the motor (17), it is also possible to stop the supply of electric power to the motor (17). is there.

In the above-mentioned hanging and conveying apparatus, it is possible to further have fixed arms (13a, 13b) fixed to a part of the side surfaces of the magnets (12a, 12b) and extending vertically downward from the side surfaces of the magnets (12a, 12b). The movement of the magnets (12a, 12b) in the first direction is hindered by the contact between the fixed arms (13a, 13b) and the article (14).

[0027] In the above suspended transfer device, the magnets (12a, 12b) are brought into contact with the posts (30) fixed to the ground to indicate the position where the conveyed object (14) is to be placed. , In the first direction.

In the above-mentioned hanging transfer device, the moving device may be composed of cranes (2a, 2b).

In the above-mentioned hanging transfer device, the moving device may be composed of a traveling body (4) which is above the magnets (12a, 12b) and travels on a horizontal plane.

In the above-mentioned hanging transfer device, the moving devices are the cranes (2a, 2b) and the cranes (2a, 2a, 2a).
b) It can also consist of a running body (4) running on it.

According to the present invention, in order to solve the above-mentioned problems, a magnet for transporting a magnetically conveyed object by using an electromagnetic force, a magnet is suspended, and the magnet is placed substantially horizontally. A method of transporting a suspended transport device, comprising: a movable device capable of being moved;
(B) monitoring the load on the mobile device, and (c) passing when the load on the mobile device starts to increase when an increase in the load on the mobile device is detected. And returning the moving device to the position of the moving device.

In the above transport method, the moving device is driven by a motor, and the step (c) includes a step of stopping the motor when an increase in the load on the moving device is detected. It is possible.

[0033]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hanging and conveying apparatus according to the present invention.

The first embodiment of the hanging and conveying apparatus according to the present invention will be described below. The first embodiment of the suspended transfer device according to the present invention is shown as a lift mag crane.

FIGS. 1 and 2 show the configuration of a first embodiment of a hanging and conveying device (rif mag crane) according to the present invention. FIG. 1 shows a first embodiment of a lift mag crane according to the present invention.
FIG. 2 shows a left side view of the embodiment.

The first embodiment of the lift mag crane 1 according to the present invention
In the embodiment, both the traveling crane and the trolley are provided.

The traveling crane has a pair of main girders 2a, 2b. Assuming that the vertical direction is the Z-axis direction, this pair of main girders 2
a and 2b are provided on a plane perpendicular to the Z-axis direction. The pair of main girders 2a and 2b extend in the same direction (X-axis direction). Here, the pair of main digits 2a, 2
The direction in which b faces each other is defined as the Y-axis direction. A guide rail 3a is provided on the upper surface of the main girder 2a. A guide rail 3b is provided on the upper surface of the main girder 2b.

The trolley 4 is guided by guide rails 3a and 3b and is movable in the X-axis direction. The trolley 4 is connected to a pair of main girders 2a, 2 via guide rails 3a, 3b.
b.

The guide column 5 is fixed to the trolley 4, and penetrates the center of the trolley 4 in the Z-axis direction. The inside of the guide column 5 is hollow.

The mast 6 passes through the hollow portion of the guide column 5 in the Z-axis direction.

The suspension beam 7 is swingably connected to the mast 6 at the lower end of the mast 6.

The trolley 4 fixes a pair of hoisting drums 8a and 8b. The trolley 4 is provided with a sheave 1 on a hoisting rope 9a wound on a hoisting drum 8a.
The suspension beam 7 is suspended from a hoisting rope 9b wound up by a hoisting drum 8b via a lift mag crane 10b. The suspension beam 7 is made of a member having a predetermined length, and its length direction extends substantially in a direction perpendicular to the Z-axis direction. In particular, it is desirable that the length direction of the suspension beam 7 extends in the Y-axis direction.

The lifting magnet device 12a (or the lifting magnet device) is suspended at one end of the suspension beam 7 by a chain group 11a composed of several chains. Each chain of the chain group 11a is connected to four symmetrical corners of the lifting magnet device 12a. The lift mag crane 12b is suspended from the other end of the suspension beam 7 by a lift mag crane 11b composed of several chains. Also, the riff mag crane 11
b and the four symmetrical corners of the lift mag crane 12b are connected.

Lifting magnet devices 12a, 12
b transports the steel material 14 placed on the steel material table 16 and between the guide posts 15 by magnetic force.
Can be held.

A pair of fixed arms 13a is fixed to a part of the side surface of the lifting magnet device 12a.
The fixed arm 13a has a predetermined length, and extends vertically downward from a portion connected to the lifting magnet device 12a. The tip of the fixed arm 13a extends below the bottom of the lifting magnet device 12a. A pair of fixed arms 13b is fixed to a part of the side surface of the lift mag crane 12b. The fixed arm 13b has a predetermined length, and extends vertically downward from a connection portion with the lift mag crane 12b. The tip of the fixed arm 13b extends below the bottom of the lift mag crane 12b.

Next, the functions of the traveling crane will be described below.
FIG. 3 shows functional blocks of the traveling crane.

The traveling crane has a motor 17 for operating the traveling crane and a crane control device 18 for controlling the motor 17. The motor 17 includes a current detection unit 19 and a motor control unit 2 in the crane control device 18.
1 is connected.

The current detector 19 is connected to the motor 17 and the crane operation controller 20. Current detector 19
Monitors the value of the current flowing through the motor 17. A signal corresponding to the change in the value of the current is transmitted to the crane operation control
Output to

The crane operation control unit 20 includes a current detection unit 19
And the motor control unit 21. The crane operation control unit 20 outputs a control signal for controlling the operation of the traveling crane to the motor control unit 21 in response to the signal output from the current detection unit 19.

The motor control unit 21 is connected to the motor 17 and the crane operation control unit 20. The motor control unit 21 controls the operation of the motor 17 based on the signal output from the crane operation control unit 20.

Next, the lift mag crane 1 according to the present invention will be described.
The operation of the first embodiment will be described below.

FIG. 4 is a flowchart showing the operation of the first embodiment of the lift mag crane 1 according to the present invention.

Referring to FIG. 4, in step S101,
The lift mag crane 1 operates the traveling crane and the traveling trolley 4 to move the lift mag crane 1
2a and 12b are moved. Rif mag device 1 at this time
2a and 12b move at a height that does not collide with the steel material 14 or the guide post 15 arranged on the steel material table 16.

In step S102, the lift mag crane 1
Temporarily stops the rif mag devices 12a and 12b on the steel placing table 16.

In step S103, the lift mag crane 1
Moves the rif-mag devices 12a and 12b vertically downward,
Stop at a certain height. At this time, the rifmag device 12
The heights of the fixed arms 13a and 13b are adjusted such that the heights of the distal ends of the fixed arms 13a and 13b are lower than the height of the uppermost part of the steel material 14 stacked on the steel material table 16.

At step S104, the lift mag crane 1
Moves the rif-mag devices 12a and 12b, the heights of which have been adjusted in step S103, in a first horizontal direction using a traveling crane.

In step S105, if the current value of the motor 17 obtained by the crane control device 18 of the traveling crane exceeds a predetermined current value, the crane control device 18 detects an abnormality in the current value and executes step S106. I do. The predetermined current value is a current value obtained by multiplying the current value consumed by the motor 17 during execution of step S104 by one or more preset numbers.

A case where the current value of the motor 17 detected by the crane control device 18 of the traveling crane shown above exceeds a predetermined current value will be described below. The fixed arms 13a and 13b of the rif mag devices 12a and 12b collide with the steel material 14 stacked on the steel material table 16. At this time, the rif-mag devices 12a and 12b are almost stopped by being prevented from moving in the first direction, but the traveling crane is moving the suspension beam 7 in the first direction. For this reason, the load on the traveling crane for moving the lift magnet devices 12a and 12b increases, and the load on the motor 17 increases. As a result, the value of the current flowing through the motor 17 increases.

In step S105, the current detector 1
When the current value flowing through the motor 17 detected by the motor 9 is equal to or smaller than the predetermined current value, the lift mag crane 1 continues to move the lift mag devices 12a and 12b by the traveling crane in the first direction shown in step S104.

In step S106, the crane control device 1
8 stops the motor 17. In this case, the traveling crane moves in a direction opposite to the first direction in order to cancel the load applied from the substantially stopped riff mag devices 12a and 12b. When the position of the suspension beam 7 is almost immediately above the rif-mag devices 12a and 12b, the load of the horizontal component applied to the traveling crane is eliminated. For this reason, the traveling crane stops at a position where the position of the suspension beam 7 is almost immediately above the rif-mag devices 12a and 12b.

In step S107, the lift mag crane 1
Lowers the rif-mag devices 12a and 12b to land. Here, when the rifmag devices 12a and 12b hold the steel material 14 by magnetic force, the rifmag devices 12a and 12b
The steel materials 14 stacked on the steel material placing table 16 are arranged below the steel materials 14 held by the above. In addition, when the rifmag devices 12a and 12b do not hold the steel material 14, they contact the lower surface portions of the rifmag devices 12a and 12b,
The steel materials 14 stacked on the steel material table 16 are arranged.

Next, when the rifmag devices 12a and 12b hold the steel material 14 by magnetic force, in step S108,
The rif-mag device 12a, 12b is the steel material 1
Release 4.

If the rifmag devices 12a and 12b do not hold the steel material 14, the rifmag devices 12a and 12b use the magnetic force to move the steel material table 16 in step S108.
The steel material 14 disposed above is held.

At step S109, the lift mag crane 1
Moves the rif-mag devices 12a and 12b vertically upward. Thereafter, the lift mag crane 1 repeatedly executes Step S101 and subsequent steps until the transfer of the steel material 14 is completed.

Next, the positioning operation in the first embodiment of the lift mag crane according to the present invention will be described below.

FIGS. 5 (a) to 5 (d) show a lifting magnet device according to the first embodiment of the lift mag crane 1 of the present invention. FIG. 5 is a left side view of the lift mag crane 1 for describing an operation of moving 12a and 12b.

First, as shown in FIG. 5 (a), the lift mag crane 1 stops at a predetermined position on the steel placing table 16 and moves the suspension beam 7 vertically downward. At this time, the heights of the lower surfaces of the lifting magnet devices 12a and 12b are higher than the uppermost portions of the steel materials 14 stacked on the steel material table 16, and the fixed arms 13a and 13b are fixed.
The height of the suspension beam 7 is controlled so that the tip of the suspension beam 7 is lower than the top of the steel material 14.

Next, the lift crane 1 is moved in a substantially horizontal first direction 23 by the traveling crane.

Next, as shown in FIG. 5B, when the fixed arms 13a and 13b collide with the steel material 14, the lifting magnet devices 12a and 12b are prevented from moving in the first direction 23 by the steel material 14. . In this case, the lifting magnet devices 12a and 12b almost stop, but the lift mag crane 1 attempts to continue moving in the first direction 23. For this purpose, the first direction 2 of the lift mag crane 1 is transmitted from the lifting magnet devices 12a and 12b via the chains 11a and 11b and the suspension beam 7.
A force is generated that attempts to hinder movement to 3. As a result, the load applied to the motor 17 increases.

Measured by the crane controller 18
When the load applied to the motor 17 is equal to or more than a certain value or when the load applied when the lift mag crane 1 is moved in the first direction 23 is equal to or more than a load obtained by adding a fixed ratio, the crane control device 18 supplies the electric power to the motor 17. Stop supply.

In this case, as shown in FIG. 5C, the lift mag crane 1 is moved in a second direction 2 opposite to the first direction 23.
4 and stops at a position where the position of the suspension beam 7 is almost directly above the lifting magnet devices 12a and 12b at which the suspension beam 7 is almost stopped.

Next, as shown in FIG. 5 (d), the lift mag crane 1 moves the suspension beam 7 vertically downward 25 to remove the lower surface portions of the lifting magnet devices 12a and 12b from the steel materials 14 stacked on each other. Land on top.

Finally, the lifting magnet device 12
Reference numerals a and 12b hold the uppermost one of the stacked steel materials 14 by magnetic force.

FIGS. 6 (a) to 6 (d) show the steel material 14 held by the lifting magnet device 12a and the lift mag crane 12b in the first embodiment of the lift mag crane 1 of the present invention. Lifting magnet devices 12a, 12a are stacked on top of the steel material 14 stacked on the table 16.
FIG. 5 is a left side view of the lift mag crane 1 for explaining an operation of moving b.

First, as shown in FIG. 6A, the lift mag crane 1 stops at a predetermined position on the steel placing table 16 and moves the suspension beam 7 vertically downward. At this time, the height of the lowermost part of the steel material 14 held by the lifting magnet devices 12a and 12b is
6, higher than the top of the steel material 14 stacked on it,
The tips of the fixed arms 13a, 13b are
The height of the suspension beam 7 is controlled so as to be lower than the uppermost part of the steel materials 14 stacked on the ceiling 6.

Next, the lift crane 1 moves in a substantially horizontal third direction 27 by the traveling crane.

Next, as shown in FIG. 6B, when the fixed arms 13a and 13b collide with the steel material 14 stacked on the steel material table 16, the lifting magnet devices 12a and 12b The movement in the direction 27 is hindered by the steel material 14 stacked on the steel work table 16. In this case, the lifting magnet device 12
Although a and 12b almost stop, the riff mag crane 1 tries to continue moving in the third direction 27. For this,
A force is generated from the lifting magnet devices 12a and 12b via the chain groups 11a and 11b and the suspension beam 7 so as to prevent the movement of the lift mag crane 1 in the third direction 27. As a result, the load applied to the motor 17 increases.

Measured by the crane controller 18
When the load applied to the motor 17 is equal to or greater than a predetermined value or equal to or greater than a load obtained by moving the lift mag crane 1 in the third direction 27 by a certain ratio, the crane control device 18 supplies the electric power to the motor 17. Stop supply.

In this case, as shown in FIG. 6C, the lift mag crane 1 is moved in the fourth direction 2 opposite to the third direction 27.
8 and stops at a position such that the position of the suspension beam 7 is almost immediately above the lifting magnet devices 12a and 12b at which the suspension beam 7 is almost stopped. At this time, the steel material 14 held by the lifting magnet devices 12a and 12b by magnetic force is the steel material 14 stacked on the steel material table 16.
It is aligned directly above.

Next, as shown in FIG. 6 (d), the lift mag crane 1 moves the suspension beam 7 vertically downward 29 to place the steel material 14 held by the lifting magnet devices 12a and 12b with magnetic force on the steel material. The steel material 14 stacked on the table 16 is landed on the top.

Finally, the lifting magnet device 12
a and 12b release the steel material 14 held by magnetic force.

Here, in the first embodiment of the lift mag crane according to the present invention, a configuration without the trolley 4 is also possible. In this case, the guide rails 3a, 3b consist of fixing members for fixing the trolley 4 to the main beams 2a, 2b.

Next, a first modification of the first embodiment of the lift mag crane according to the present invention will be described below.

The configuration of the first modification of the first embodiment of the lift mag crane of the present invention is the same as that of the first embodiment of the lift mag crane of the present invention.

In the first modified example of the first embodiment of the lift mag crane according to the present invention, the suspension beam 7 is horizontally moved by the trolley 4. For this purpose, the motor 17 and the crane control device 18 shown in FIG. The motor 17 is a motor for operating the trolley 4. The crane control device 18 has a function of controlling the operation of the trolley 4. A current detector 19 in the crane control device 18 monitors the value of the current flowing through the motor 17. A signal corresponding to the change in the current value is output to the crane operation control unit 20. The crane operation control unit 20 in the crane control device 18 includes the current detection unit 1
A control signal for controlling the operation of the trolley 4 is output to the motor control unit 21 in response to the signal output from the trolley 4. The motor control unit 21 in the crane control device 18 controls the operation of the motor 17 based on a signal output from the crane operation control unit 20.

The operation of the first modification of the first embodiment of the lift mag crane according to the present invention is that the trolley 4 performs the operation of the traveling crane performed from step S104 to step S106 shown in FIG. Except for the above, the operation is the same as that of the first embodiment of the lift mag crane according to the present invention.

Here, the first modified example of the first embodiment of the lift mag crane according to the present invention can be configured without a traveling crane. In this case, the main girders 2a and 2b are fixed by a fixing member (not shown).

Next, a second modification of the first embodiment of the lift mag crane according to the present invention will be described below.

The configuration of the second modification of the first embodiment of the lift mag crane of the present invention is the same as that of the first embodiment of the lift mag crane of the present invention.

A second modification of the first embodiment of the lift mag crane according to the present invention comprises a traveling crane and a trolley 4.
At the same time, the suspension beam 7 is moved in the horizontal first direction. For this reason, the motor 17 shown in FIG. The motor 17 provided on the trolley 4 is a motor for operating the trolley 4.

Further, the crane control device 18 is
Is also connected to the motor 17 for operating
The crane control device 18 includes the traveling crane and the trolley 4.
Has the function of controlling the operation of Crane control device 18
The current detector 19 in the middle monitors the value of the current flowing through the motor 17 of the traveling crane and the motor 17 of the trolley 4. A signal corresponding to the change in the current value is output to the crane operation control unit 20. The crane operation control unit 20 in the crane control device 18 outputs a control signal for controlling the operation of the trolley 4 to the motor control unit 21 in response to the signal output from the current detection unit 19. The motor control unit 21 in the crane control device 18 controls the operation of the motor 17 of the traveling crane and the motor 17 of the trolley 4 based on the signal output from the crane operation control unit 20.

In the operation of the first modification of the first embodiment of the lift mag crane according to the present invention, the operation of the traveling crane performed from step S104 to step S106 shown in FIG. Otherwise, the operation is the same as that of the first embodiment of the lift mag crane according to the present invention.

Next, a second embodiment of the suspended transfer device according to the present invention will be described below. The second embodiment of the suspended transfer device according to the present invention is also shown as a lift mag crane.

The structure of the second embodiment of the hanging transfer device (rif mag crane) according to the present invention is as follows.
Except that 3a and 13b are not provided, the configuration is the same as that of the first embodiment of the lift mag crane of the present invention.

Next, the operation of the second embodiment of the lift mag crane according to the present invention will be described below. Here, the operation of the second embodiment of the lift mag crane according to the present invention is described with reference to FIG. 7A instead of the movement of the lift mag devices 12a and 12b being hindered by the collision of the fixed arms 13a and 13b with the steel material 14. As shown in (d), the steel material 14 or the rif mag device 1 which is a conveyed object to the lateral contact post 30 is shown.
2a and 12b collide, and the
Except that the movement of a and 12b is hindered, the operation is the same as that of the first embodiment of the lift mag crane according to the present invention. Here, the lateral contact post 30 is fixed to the steel placing table 16 and extends vertically upward. Further, the steel materials 14 stacked in multiple stages are arranged in contact with the side of the lateral contact post 30. The lateral contact post 30 is disposed in the fifth direction 32 described later with respect to the steel material 14.

FIGS. 7 (a) to 7 (d) show a second embodiment of the lift mag crane 1 according to the present invention, in which the steel material 14 held by the lifting magnet device 12a and the lift mag crane 12b is moved to the steel material table 1.
FIG. 6 is a left side view of the lift mag crane 1 for explaining an operation of moving the lifting magnet devices 12a and 12b in order to stack the steel materials 14 stacked on the upper surface of the steel material 14.

First, as shown in FIG. 7 (a), the lift mag crane 1 stops at a predetermined position on the steel placing table 16, and moves the suspension beam 7 vertically downward. At this time, the height of the lowermost part of the steel material 14 held by the lifting magnet devices 12a and 12b is
6, higher than the top of the steel material 14 stacked on it,
The height of the suspension beam 7 is controlled so as to be lower than the top of the lateral contact post 30.

Next, the traveling crane causes the lift mag crane 1 to move in a substantially horizontal fifth direction 32.

Next, as shown in FIG. 7 (b), the steel material 14 or the lifting magnet device 12
a and 12b collide with the lateral contact post 30, the lifting magnet devices 12a and 12b
2 is impeded by its lateral contact post 30. In this case, the lifting magnet devices 12a, 1
2b almost stops, but the riff mag crane 1 tries to continue moving in the fifth direction 32. For this purpose, the chain group 1 is lifted from the lifting magnet devices 12a and 12b.
Via 1a, 11b and the suspension beam 7, a force is generated that prevents the movement of the lift mag crane 1 in the fifth direction 32. As a result, the load applied to the motor 17 increases.

Measured by the crane controller 18
When the load applied to the motor 17 is equal to or more than a certain value or when the load applied when the lift mag crane 1 is moved in the fifth direction 32 is equal to or more than a load obtained by adding a fixed ratio, the crane control device 18 supplies the electric power to the motor 17. Stop supply.

In this case, as shown in FIG. 7C, the lift mag crane 1 is moved in the sixth direction 3 which is opposite to the fifth direction 32.
3 and stops at a position where the position of the suspension beam 7 is almost immediately above the lifting magnet devices 12a and 12b at which the suspension beam 7 is almost stopped. At this time, the steel material 14 held by the lifting magnet devices 12a and 12b by magnetic force is the steel material 14 stacked on the steel material table 16.
It is aligned directly above.

Next, as shown in FIG. 7 (d), the lift mag crane 1 moves the suspension beam 7 vertically downward 34 to place the steel material 14 held by the lifting magnet devices 12 a and 12 b with a magnetic force on the steel material holder. The steel material 14 stacked on the table 16 is landed on the top.

Finally, the lifting magnet device 12
a and 12b release the steel material 14 held by magnetic force.

Here, the second embodiment of the lift mag crane according to the present invention can be configured without the trolley 4. In this case, the guide rails 3a, 3b consist of fixing members for fixing the trolley 4 to the main beams 2a, 2b.

Next, a first modification of the second embodiment of the lift mag crane according to the present invention will be described below.

The structure of the first modification of the second embodiment of the lift mag crane of the present invention is the same as that of the second embodiment of the lift mag crane of the present invention.

In a first modification of the second embodiment of the lift mag crane according to the present invention, the suspension beam 7 is horizontally moved by the trolley 4. For this purpose, the motor 17 and the crane control device 18 shown in FIG. The motor 17 is a motor for operating the trolley 4. The crane control device 18 has a function of controlling the operation of the trolley 4. A current detector 19 in the crane control device 18 monitors the value of the current flowing through the motor 17. A signal corresponding to the change in the current value is output to the crane operation control unit 20. The crane operation control unit 20 in the crane control device 18 includes the current detection unit 1
A control signal for controlling the operation of the trolley 4 is output to the motor control unit 21 in response to the signal output from the trolley 4. The motor control unit 21 in the crane control device 18 controls the operation of the motor 17 based on a signal output from the crane operation control unit 20.

Here, the first modification of the second embodiment of the lift mag crane according to the present invention can be configured without a traveling crane. In this case, the main girders 2a and 2b are fixed by a fixing member (not shown).

Next, a second modification of the second embodiment of the lift mag crane according to the present invention will be described below.

The configuration of the second modification of the second embodiment of the lift mag crane of the present invention is the same as that of the second embodiment of the lift mag crane of the present invention.

A second modification of the second embodiment of the lift mag crane according to the present invention comprises a traveling crane and a trolley 4.
At the same time, the suspension beam 7 is moved in the horizontal first direction. For this reason, the motor 17 shown in FIG. The motor 17 provided on the trolley 4 is a motor for operating the trolley 4.

Further, the crane control device 18 is
Is also connected to the motor 17 for operating
The crane control device 18 includes the traveling crane and the trolley 4.
Has the function of controlling the operation of Crane control device 18
The current detector 19 in the middle monitors the value of the current flowing through the motor 17 of the traveling crane and the motor 17 of the trolley 4. A signal corresponding to the change in the current value is output to the crane operation control unit 20. The crane operation control unit 20 in the crane control device 18 outputs a control signal for controlling the operation of the trolley 4 to the motor control unit 21 in response to the signal output from the current detection unit 19. The motor control unit 21 in the crane control device 18 controls the operation of the motor 17 of the traveling crane and the motor 17 of the trolley 4 based on the signal output from the crane operation control unit 20.

The operation of the second modification of the first and second embodiments of the lift mag crane according to the present invention is similar to the operation of the traveling crane performed from step S104 to step S106 shown in FIG. 4 is the same as the operation of the second embodiment of the lift mag crane according to the present invention, except that the operation is performed by Step 4.

The second embodiment of the lift mag crane according to the present invention comprises lifting magnet devices 12a and 12a.
b collide against the lateral contact post 30, and the lifting magnet device 1 is used based on the load generated by the collision.
Since the positioning of 2a and 12b is performed, there is an effect that the positioning of the rifmag device can be automatically performed.

In the first and second embodiments of the lift mag crane according to the present invention, since the positioning of the lifting magnet devices 12a and 12b is performed as described above, multi-stacking of the conveyed material is facilitated. It has the effect that it is possible.

Further, in the first and second embodiments of the lift mag crane according to the present invention, since the positioning of the lifting magnet devices 12a and 12b is performed as described above, multi-stacking of the conveyed articles by automatic operation is performed. This has the effect that it can be performed.

[0117]

The present invention has the effect that the positioning of the rif mag device can be automatically performed.

Further, the present invention has an effect that it is possible to easily carry a plurality of stacked articles.

Further, the present invention has an effect that it is possible to carry out multi-stage stacking of conveyed articles by automatic operation.

[Brief description of the drawings]

FIG. 1 is a front view of a lift mag crane according to the present invention.

FIG. 2 is a left side view of the lift mag crane according to the present invention.

FIG. 3 shows functional blocks of a traveling crane.

FIG. 4 is a flowchart showing the operation of the lift mag crane according to the present invention.

FIGS. 5 (a) to 5 (d) show the first embodiment of the lift mag crane according to the present invention, in which the lifting magnet device is moved to the uppermost part of the steel material stacked on the steel material table. FIG. 5 is a left side view of the riff mag crane for explaining an operation to be performed.

FIGS. 6 (a) to 6 (d) show a first embodiment of the lift mag crane according to the present invention, in which steel materials held by a lifting magnet device are stacked on a steel material table. It is a left view of a lift mag crane for explaining operation which moves a lifting magnet device in order to pile up on a steel material.

FIGS. 7 (a) to 7 (d) show a second embodiment of the lift mag crane according to the present invention, in which steel materials held by a lifting magnet device are stacked on a steel material table. It is a left view of a lift mag crane for explaining operation which moves a lifting magnet device in order to pile up on a steel material.

FIG. 8 shows a front view of a riff mag crane according to the prior art.

FIG. 9 shows a left side view of a conventional rif mag crane.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rif mag crane 2a, 2b Main girder 3a, 3b Guide rail 4 Trolley 5 Guide column 6 Mast 7 Suspension beam 8a, 8b Hoist drum 9a, 9b Hoist rope 10a, 10b Sheave 11a, 11b Chain group 12a, 12b Lifting magnet device 13a, 13b Fixed arm 14 Steel material 15 Guide post 16 Steel material stand 17 Motor 18 Crane control device 19 Current detection unit 20 Crane operation control unit 21 Motor control unit 22 Vertical lower 23 First direction 24 Second direction 25 Vertical lower 26 Vertical lower 26 27 Third direction 28 Fourth direction 29 Vertical downward 30 Lateral contact post 31 Vertical downward 32 Fifth direction 33 Sixth direction 34 Vertical downward 100 Rif mag crane 101a, 101b Main girder 102a, 102b Guide rail 1 3 trolley 104 guide column 105 mast 106 hanging beams 107a, 107b hoist drum 108a, 108b hoisting ropes 109a, 109b sheaves 110a, 110b chain group 111a, 111b lifting magnet device 112 steel 113 guide post 114 steel stand

Claims (10)

[Claims] 1. A suspension transport device for transporting a magnetic material, comprising: a magnet capable of attracting the magnetic material using a magnetic force; and a motor, wherein the magnet is suspended and moved. And a control unit, wherein the control unit monitors a load applied to the motor, and the magnet moves when the moving device moves the magnet in a first horizontal direction. Control means for controlling the movement of the motor so as to reduce the load on the motor when an increase in the load on the motor caused by hindering the movement in the first direction is detected. , Hanging transfer device. 2. The hanging transfer device according to claim 1, wherein the control unit, when detecting an increase in the load on the motor, controls the moving device to reduce the load on the motor. 1
Hanging transfer device that moves in the opposite direction to 3. The suspended transfer device according to claim 1, wherein the control unit stops supplying power to the motor when detecting an increase in load on the motor. 4. The hanging and transporting device according to claim 1, further comprising a fixed arm fixed to a part of the magnet side surface and extending vertically downward from the magnet side surface. The suspended transfer device, wherein the magnet is prevented from moving in the first direction by contact between the fixed arm and the transferred object. 5. The hanging transport device according to claim 1, wherein the magnet is fixed to the ground to indicate a position where the transported object is to be arranged. A suspended transfer device, wherein contact with a post hinders movement in the first direction. 6. The hanging transfer device according to claim 1, wherein the moving device comprises a crane. 7. The suspended transport device according to claim 1, wherein the moving device is an upper portion of the magnet, and includes a traveling body traveling on a horizontal plane. apparatus. 8. The hanging and conveying device according to claim 1, wherein the moving device includes a crane and a traveling body that runs on the crane. 9. A suspension comprising a magnet for transporting a magnetically conveyed object using electromagnetic force, and a moving device capable of suspending the magnet and moving the magnet substantially horizontally. A method of transporting a transport device, comprising: (a) the moving device moving the magnet in a substantially horizontal first direction; and (b) monitoring a load on the moving device. c) when detecting an increase in the load on the mobile device, returning the mobile device to the position of the mobile device that passed when the load on the mobile device began to increase. 10. The transport method according to claim 9, wherein:
Here, the moving device is driven by a motor, and the step (c) includes a step of stopping the motor when an increase in the load on the moving device is detected.