JPH10203771A - Lifting electromagnet device capable of selecting number of lifting objects with automatic positioning function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To individually and automatically recover displacement from a center of a plural number of billets and a plural number of lifting electromagnets and optionally select the number of the billets to lift. SOLUTION: A lifting electromagnet position adjusting means is furnished for each of lifting electromagnets so as to match each of central positions in relationship of hanging positions against a lifting beam 20 of each of the lifting electromagnets 1a-1c with an object to be attracted. Displacement sensors 4a-4c are installed on a movable carriage 21 of each of the lifting electromagnets, and positioning of the central position of each of the lifting electromagnets and its object to be attracted is carried out by moving motors 6a-6c for driving of each of the movable carriages by receiving a signal of each of the displacement sensors and automatically moving each of the lifting electromagnets on a track of the lifting beam.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting electromagnet apparatus which can be used to select a desired number of steel materials such as billets by using a plurality of lifting electromagnets in an ironworks or the like. More particularly, the present invention relates to a lifting electromagnet device having an automatic positioning function for each lifting electromagnet in relation to each of a plurality of lifting electromagnets constituting the apparatus of the present invention, individually in relation to an object to be attracted.

[0002]

2. Description of the Related Art In a steel mill, a billet, which is a steel material, is rolled from a billet storage area according to the progress of rolling.
There is a process in which the specified number is selected, lifted, and loaded on a truck to the heating furnace. FIG. 4 shows a step of lifting a billet in this step. FIG. 1A is a front view of a lifting electromagnet device having a function of selecting the number of lifting units, and FIG. 1B is a side view thereof. FIG.
(B) shows a plurality of the lifting electromagnet devices (6 in the drawing).
), And each of the lifting electromagnets is selectively excited using the lifting electromagnets 10a to 10f, and a plurality (three in the drawing) of the lifting electromagnets are shown.
3 shows a process of selecting and lifting a plurality (two in the figure) of billets 3a, 3b from among the billets 3a, 3b, 3c. Since the number of hoisting electromagnets can be arbitrarily selected, the number of hoisting billets can be made to correspond to the progress of rolling as described above.

[0003]

However, in the case where such a work of selecting the number of suspensions and actually lifting the work is performed,
The center of the billet in the width direction may be different at each stage of the billet due to deformation of the billet itself or fluctuation of the arrangement pitch of the billet. In this case, in order to hoist the billet in a stable state, the crane operator manually and visually checks each hoisting electromagnet at each stage and for each billet by the crane operator before hoisting. It is necessary to perform a step of performing a positioning operation for adjusting the displacement of both billets so that the center of each billet coincides with the center in the width direction.

A more detailed description of such center alignment is as follows. FIG. 5 is a diagram showing an operation procedure for center alignment. As shown in FIG. 2A, the intervals between the arrangements of the billets in each stage are different for each stage, while the intervals between the lifting electromagnets are constant. In the figures (A) to (D), the upper billets 3a to 3c
And the center positions of the lifting electromagnets 10a to 10c on the suction side are indicated by short vertical lines. Reference numeral 11 denotes a support for the billet. Therefore, FIG.
As shown in (B), the center of the billet 3a and the lifting electromagnet 10a are firstly aligned by the crane operation visually observed by the worker, and even if the billet 3a is lifted, the billet 3a is held as shown in FIG. The adjacent billet 3b cannot be lifted as it is, and the billet 3a
After lifting, the billet 3b cannot be lifted by the lifting electromagnet 10b unless the crane is visually operated and the worker on the ground repeats the operation of aligning the center between the lifting electromagnet 1b and the billet 3b. Further, as shown in FIG. 3C, the same operation must be repeated for billets 3c and thereafter, and as shown in FIG.
At present, it is possible to finish the step of lifting the desired number of billets after repeating the centering operation for each billet. As described above, in the conventional apparatus, although the function of selecting the number of liftings is provided on the side of the angled lifting electromagnet apparatus, the function cannot be effectively utilized. However, there has been a problem that an extremely complicated centering operation is repeatedly required.

[0005] The present invention solves the problems (problems) of the conventional apparatus, saves such an extremely complicated work process which has occurred in the conventional apparatus, and enables the arbitrary selection of the number of billets to be lifted. In order to make effective use of the excellent functions of the above, when lifting the billet of each stage, when the crane descends and the lifting electromagnet approaches the billet, each lifting electromagnet can be automatically aligned with the center of each billet It is an object to provide a lifting electromagnet device having a function.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a plurality of lifting electromagnets are suspended on one suspension beam.
In a conventional lifting electromagnet device having a function of arbitrarily selecting the number of lifting electromagnets, each lifting electromagnet is provided by attaching a displacement sensor and a lifting electromagnet position adjusting means for adjusting a mounting position of the lifting electromagnet with respect to a hanging beam for each lifting electromagnet. Each time, the center position with the steel material to be sucked is automatically adjusted. In this case, in the lifting electromagnet provided with a plurality of lifting electromagnets attached to a single suspension beam via a moving trolley, the position adjusting means of the lifting electromagnet includes a displacement sensor attached to the moving trolley of each lifting electromagnet. In response to the signals from the displacement sensors, the driving motors constituting the movable carts are moved to provide a function of automatically moving the lifting electromagnets on the lifting beam trajectory. The positioning of the center position with the suction target can be performed by moving the drive motor based on the detection output of each of the displacement sensors. By providing the position adjusting means of the lifting electromagnets as described above, it is possible to automatically adjust the alignment of the center position between each lifting electromagnet and a steel material such as a billet to be lifted. The operation can be omitted, and the function of the device, that is, the number of lifting units can be selected, can be effectively utilized. That is, the operation performed when the lifting electromagnet according to the present invention lifts the billet to be processed is as follows. (1) The apparatus is lowered by the operation of the crane so as to be in contact with the upper surface of the billet to be attracted, and the crane is temporarily stopped at a position where the bottom surface of each lifting electromagnet is somewhat close to the opposite billet. (2) Next, the displacement between the billet side surface and the lifting electromagnet is detected by a displacement sensor installed on each lifting electromagnet. (3) Upon receiving a signal from the displacement sensor, the drive motor is set to operate automatically until the center of the billet and the center of the lifting electromagnet coincide with a position within a predetermined allowable range. Is moved to the left or right in the width direction to align the center position with the billet to be suctioned. (4) When it is detected for each displacement sensor that the position of each lifting electromagnet is appropriate, the crane is lowered, and the lifting electromagnet is brought into contact with each billet to be attracted and lifted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of a lifting electromagnet apparatus according to the present invention and having an automatic positioning function and capable of selecting the number of suspensions will be described with reference to FIG. FIG. 1A is a front view of the apparatus of the present invention, and FIG. 1B is a left half of a side view of a state in which a pair of lifting electromagnet apparatuses, which is a pair of the present invention apparatuses, is supported by one suspension beam. The side view of the device according to the invention is symmetrical. As shown in FIG. 1A, the present apparatus having a plurality of (three in the figure) lifting electromagnets 1 a to 1 c is supported by a crane suspension column 2 via a suspension beam 20. FIGS. 3A and 3B show members 23b related to the lifting electromagnets 1a to 1c.
1, 23b2, 23c1, 23c2, etc. are shown, but the following description will be made only for the lifting electromagnet 1a. As shown in FIG. 2B, each lifting electromagnet 1a is connected to a pair of moving wheel rails 24a, 24b by two connecting plates 23a1, 23a2 to which left and right electric moving wheels 5a, 5a are attached, respectively. Hanged. The pair of moving wheel rails 24a and 24b is
It is supported by the suspension beam 20 via 2a, 22b. These moving wheels 5a, 5b, connecting plate 23a1,
23a2, rails 24a and 24b and connecting member 22a,
The movable carriage 21 for the lifting electromagnet 1a is constituted by 22b. Further, a displacement sensor 4a and a driving motor 6a are attached to the connecting plates 23a1 and 23a2 supporting the lifting electromagnet 1a. In addition, the connection plates 23a1, 23
a2, displacement sensor 4a attached to a2, motorized moving wheel 5
FIG. 2 shows an enlarged view of the vicinity of a, 5a and the driving motor 6a. As shown in the figure, the driving motor 6a rotates in response to a signal from the displacement sensor 4a, the electric moving wheel 5a is moved via the driving belt 25a, and the lifting position of the lifting electromagnet is automatically adjusted. Configuration.

An embodiment in which the apparatus of the present invention is implemented by the above-described configuration will be described with reference to FIG. The apparatus is lowered by a crane (not shown) so as to be in contact with the upper surfaces of a plurality (three in the drawing) of billets 3a to 3c to be attracted, and the bottom surfaces of the lifting electromagnets 1a to 1c are somewhat attracted. When approaching the billets 3a to 3c to be processed, the lowering of the crane is temporarily stopped as shown in FIG.

Next, a plurality of (three in the figure) displacement sensors 4a to 4c installed on the lifting electromagnets 1a to 1c are used to control the center of the billets 3a to 3c and the lifting electromagnet 1a.
１1c with respect to the center of １1c are detected. Here, a method of detecting the displacements Δa to Δc will be described. For convenience of explanation, dummy billets 30a to 30c that match the center of the lifting electromagnet when the crane descends are shown by broken lines in FIG.
The actual billets 3a to 3c are arranged shifted from the dummy billets 30a to 30c as shown by solid lines in FIG. Since the positions of the side surfaces of the dummy billets 30a to 30c whose centers coincide with the lifting electromagnets 1a to 1c are input to the displacement sensors 4a to 4c in advance, the actual positions of the billets 3a to 3c to be attracted are input. The displacements Δa2 to Δc2 between the side surfaces and the side surfaces of the dummy billets 30a to 30c can be detected. Each billet 3
The displacements Δa2 to Δc2 are detected for a to 3c, and the displacements Δa2 to Δc2 are regarded as the displacements Δa to Δc of the centers of the lifting electromagnets 1a to 1c and the billets 3a to 3c. That is, for example, the displacement sensor 4a detects the displacement Δ between the side surface of the billet 3a and the side surface dummy billet 30a.
a2 is detected and its displacement is detected as a displacement Δa between the center of the billet 3a and the center of the lifting electromagnet 1a according to the present invention. Hereinafter, the same applies to the displacements Δb and Δc.

Next, upon receiving signals from the above-described displacement sensors 4a to 4c, the motorized driving wheels 5a to 5c constituting the movable carriage 21 are driven by the driving motors 6a to 6c along the suspension beam, The lifting electromagnets 1a to 1c are moved in the width direction of the billets 3a to 3c so as to eliminate the displacements Δa to Δc. That is, the lifting electromagnets 1a to 1c are moved until the centers of the billets 3a to 3c and the centers of the lifting electromagnets 1a to 1c fall within a certain allowable range. Here, the lifting electromagnets 1a to 1c are individually moved in accordance with the signals from the displacement sensors 4a to 4c, respectively, as in the case of detecting the above-described displacement, and are individually performed independently. That is, for example, the lifting electromagnet 1a moves in response to a signal from the displacement sensor 4a. Hereinafter, the same applies to the lifting electromagnets 1b and 1c. After the centers of the billets 3a to 3c and the centers of the lifting electromagnets 1a to 1c are respectively matched within a certain allowable range, the crane is lowered again, and each of the billets 3a to 3c is moved to the lifting electromagnets 1a to 1c. Are respectively absorbed and suspended.

The present invention is not limited to the configuration of the above embodiment. For example, it is not limited by the number of the lifting electromagnets, the number of billets to be lifted at one time, and the type of the displacement sensor. Also, the present invention can be applied to a case where the method of driving each lifting electromagnet is different.

[0012]

According to the present invention, in a lifting electromagnet apparatus in which the number of billets to be hung can be arbitrarily selected, the following effects are brought about by providing each lifting electromagnet with an automatic positioning function. (1) It is possible to omit the alignment work of the lifting electromagnet apparatus by the above-mentioned extremely complicated visual inspection, which is conventionally required, and it is possible to perform full automatic suction of the billet. (2) In addition, the optional selection of the number of billets to be lifted can be automatically performed, and the original functions of the lifting number-selectable lifting electromagnet apparatus can be greatly utilized.

[Brief description of the drawings]

FIG. 1 is a view showing a configuration of a lifting electromagnet apparatus according to an embodiment of the present invention, wherein FIG. 1 (A) is a front view, and FIG. 1 (B) is a left half of a side view (a side view of the apparatus is shown in FIG. 1). Is symmetric)
It shows.

FIG. 2 is an enlarged side view of the vicinity of a displacement sensor, a driving motor, and an electric moving wheel of the device of the present invention.

FIG. 3 is a front view showing a configuration of a main part for explaining an operation of performing alignment with a billet by the lifting electromagnet device of the present invention.

FIG. 4 is a view showing a process of selecting and lifting the number of billets from a billet storage area by using a conventional lifting electromagnet apparatus capable of selecting the number of lifting pieces, wherein FIG. 4 (A) is a front view and FIG. Is a side view.

FIG. 5 is a diagram showing an operation process of lifting a billet while adjusting the displacement of the center of a billet and a lifting electromagnet by using a conventional lifting-number-selecting electromagnet device. Of these,
FIGS. 7A to 7D show the steps of manually aligning the centers of the billets 3a to 3c by visual observation and then lifting the same.

[Explanation of symbols]

1a to 1c: lifting electromagnets 3a to 3c: billets 4a to 4c: displacement sensors 5a to 5c: electric moving wheels 6a to 6c: driving motors 20: hanging beams 21: moving carts 22a, 22b: connecting members 23a1 to 23c2: Connecting plates 24a, 24b: rails for moving wheels 25a to 25c: driving belts 30a to 30c: dummy billets Δa2 to Δc2: displacement of side positions of dummy billets and actual billets

Claims (2)

[Claims] 1. A lifting electromagnet device which suspends a plurality of lifting electromagnets with respect to one suspension beam and selectively excites the respective lifting electromagnets, wherein a lifting position of each lifting electromagnet with respect to the suspension beam is determined. A lifting electromagnet device comprising a lifting electromagnet position adjusting means for adjusting each of the lifting electromagnets so as to adjust each center position in relation to an object to be attracted. 2. A lifting electromagnet having a plurality of lifting electromagnets attached to a single lifting beam via a moving trolley as a position adjusting means of the lifting electromagnet according to claim 1, wherein each lifting electromagnet is displaced to a moving trolley. Each of the sensors is attached, and a driving motor constituting each moving carriage is operated by receiving a signal from each displacement sensor, and a function of automatically moving each lifting electromagnet on the hanging beam trajectory is provided. A lifting electromagnet device, wherein the positioning of the center position between the lifting electromagnet and the object to be attracted is performed by moving a drive motor based on the detection output of each of the displacement sensors.