KR20020052732A - Crane lifter having a swing hook - Google Patents

Abstract

PURPOSE: A crane lifter having a rotatably coil hook is provided to prevent the degradation of the quality of a coil by minimizing the scratches on the coil during coiling, to store a large amount of coil in a yard by reducing the interval between coils, and to avoid the troubles of a lifter due to the wear of a lifter touch bar. CONSTITUTION: A crane lifter includes a coil hook(23) attached to the rear end of an arm(3) and a drive unit installed on the arm to swing the coil hook in a specific angle. If the coil hook is kept in the horizontal state and forms 90 angular degrees with the arm, the rear portion of the coil hook lifts up a coil hook fixing member(16). A drive motor(18) rotates, and the coil hook swings down 90 angular degrees. After the swing-down of the coil hook is completed, a crane is moved to a target point. If a lifter is placed on a coil on the target point, the lifter is lifted down safely. To prevent the coil from being scratched, a scratch-preventing crown roll(53) is installed on the lifter arm.

Description

Crane lifter having a swing hook

The present invention relates to a crane lifter for transferring a coil produced in a steel mill rolling mill, and more particularly, to a coil outer wound part by contact between a lifter arm (ARM) and a coil outer wound part generated in the process of conveying coils. A crane lifter having a rotatable coil hook to prevent damage and wear of the lifter arm.

In general, the crane lifter has a simple structure in which the lifter arm itself, which grips the coil, can simply move up and down depending on the presence or absence of the coil. When such a crane lifter is used to lift or unwind a coil stored in a yard (yard) in a narrow width between coils, the arm portion of the lifter contacts the both edge portions of the coil and damages the outer coil portion.

These damaged coils vary in degree, but in the case of thin coils, they are treated as scrap. On the other hand, there is a problem that the coil outer winding part needs to be cut out separately.

The main reason for this phenomenon is that the width of the lifter arm coil hook portion is wide, and in the yard where the conventional fixed lifter is used, the maximum amount of the lifter arm coil hook width of the lifter in the narrow space is as large as possible. In order to accumulate coils, the coils are stacked by minimizing the intervals between the coils, so that a large amount of coils cannot be stacked and only a large yard is caused.

In addition, if the lifter is opened while the coil is hoisted and moved to another place, then the width of the coil is narrow (particularly, the gap between coils is very narrow in the case of wide coils). It is judged that it is open by visual identification, and only the lifter is lifted.In the process of lifting, the coil arm of the lifter arm part is caught by the inner diameter of the coil and the coil and the lifter are inclined together to lift the coil and the coil around it. It hits the arm part of and causes damage to outer coil part of coil.

In addition, a conventional lifter is provided with a touch bar (TOUCH-BAR) for detecting whether the lifter cross is closed and determining whether the inner diameter portion of the coil is fully mounted by the lifter arm coil hanger. When lifting or lowering the lifter while the winding side is in contact, the wound of the coil is caused to damage the outer winding of the coil in the process of lifting or lowering the dull iron plate portion of the touch bar in contact with the outer winding of the coil. Because of the lack of smoothness, the TOUCH-BAR part of the lifter arm part is worn out due to repeated contact of the coil, and it is impossible to judge whether the inner diameter of the coil is mounted on the lifter arm coil hanger part. In the case of coils with thin coils, such as cold rolled coils, they can be easily Since it is damaged, there is a problem such as deterioration of the coil quality.

The present invention has been made to solve the conventional problems as described above, the coil hook portion of the lifter arm (ARM) to allow a predetermined angle, for example, 90 ° swing is possible in a narrow space Touch bar (TOUCH-BAR) to prevent the coil from being damaged by the lifter arm due to the narrow space between coils and to protect the outer surface of the coil during the hoisting or unloading process. It is an object of the present invention to provide a crane lifter having a swingable coil hook that can change the function of the coil to ensure the quality of the coil and prevent the risk of safety accident in advance.

1 is a perspective view of a crane lifter according to the present invention.

2 is a block diagram of a crane lifter arm according to the present invention.

3 is an exploded view of the crane lifter arm portion according to the present invention.

Figure 4 is an exploded view showing the configuration of the crown roll mounted on the crane lifter arm portion according to the present invention.

<Description of Symbols for Major Parts of Drawings>

1: crane lifter

3: lifter arm

15: cylinder

16: coil hanger holder

23: coil hanger

25, 26: sensor

53: Crown Roll

55, 56: spring

57, 58: roll seat

In order to achieve the above object, according to the present invention, a crane lifter having an arm portion for holding or hoisting a coil is a coil hook which is swingably attached at a predetermined angle to an end of the arm portion, and is mounted on the arm portion. And a driving means for swinging the coil hanger at a predetermined angle, wherein the coil hanger is swinged up to maintain a predetermined angle with the arm portion to hold the coil so that the coil can be lifted or lowered and unloaded at the target point. The coil hanger is swinged down to be parallel to the arm to release the gripping.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

First, referring to FIG. 1, a coil roll 53 for outer side surface protection of the coil bar having a touch bar function is attached to both arms of the coil lifter, and a part of the lifter arm coil coil 23 is a predetermined angle, for example, 90 °. Make it swingable.

In order to swing the part of the lifter coil hanger 23 at a predetermined angle, the drive motor 18 transmitting power to the inside of the lifter arm 3 base 11 is fixed firmly with a fixing bolt, and the acceleration and deceleration of the rotational speed of the motor is performed. Install the reduction gearbox (19).

In order for the lifter coil hanger 23 to receive the power driven from the gearbox 19, the gear 24 is attached to the coil hanger 23, and the chain 17 is used. The guide gear 20, which serves as the tension and guide of the chain 17, has a gear shaft 21 coupled to the bearing 22 and fixed to both bases 10 and 11 of the lifter arm. Sensors 25 and 26 for detecting the radius of the swing angle of the coil hanger 23 are attached adjacent to the coil hanger 23, and a sensor 27 for detecting the inner diameter of the coil is provided.

When the coil hanger 23 swings upward by a predetermined angle, for example, 90 °, to wind up the coil, the coil hangs 23 by the tension of the chain 17 only because the weight of the coil is a heavy object in tons. Can't hold the weight.

Therefore, in order to prevent the phenomenon in which the coil hanger 23 is lowered vertically down by the weight of the coil, the coil hanger 16 for fixing the gear 24 attached to the lifter arm coil hanger 23 is coiled. The hook 23 is installed inside the rear base 13 and is connected to the cylinder 15 so that it can be moved in accordance with the swing operation of the coil hook. The cylinder support 14 which fixes and supports the cylinder 15 is fixed to the base 13 by welding so that the cylinder holder 15 is up-down and the coil holder holder 16 connected to the cylinder is connected to the rear of the coil holder 23. The coil hanger 23 is fixed so as not to go down by entering.

In order to protect the outer side surface part of a coil, the coil outer winding part by the side friction of a lifter arm and a coil is provided by installing several side protection crown rolls 53 in the part of the lifter arm inner base 59 which the outer peripheral part of a coil contacts. To prevent damage.

For smooth rotation and action of the crown roll 53, it is connected to the roll supports 53, 54 and seated on the roll seats 57, 58, where the lifter can cross to lift the coil. When the outer peripheral side of the coil to the shock absorbing spring (55, 56) that is applied to the crown roll 53 is fitted to the shaft of the roll support (53, 54).

The set of crown rolls 53 assembled in this way is seated on the roll seats 57 and 58, and both sides of the lifter arm inner base 59 are covered with roll seat cover 50.51 to prevent the set of crown rolls 53 from being detached. Bolt to the

The crane provides a device that can determine the presence or absence of the coil to the lifter for lifting or unloading the coil. That is, five grooves are formed in the inner base 59 of the lifter, and when the crown roll 53 is pushed inward due to the impact applied to the crown roll 53, it detects the presence of the coil and makes it possible to determine the presence of the coil. Attach the detection sensor 60.

Referring to the operation of the present invention configured as described above are as follows.

As described above, when the crane lifter recommends the lifter at the top of the coil to move the coil, if the gap between the coils is narrow, damage is caused by the lifter arm to the outer peripheral part of the coil during the unwinding process. A lifter having a coil hanger 23 capable of swinging at an angle is used to prevent it.

If the coil hanger 23 is held 90 ° horizontally with the lifter arm 3 when the lifter arm 3 is to be recommended, the coil hanger on the rear portion of the coil hanger 23 so as to be perpendicular to the lifter arm 3. (16) to the upper (UP).

That is, when the crane hoists the lifter to start at the target point, the lifting signal signal generated at this time is transmitted to the cylinder 15 and the received cylinder 15 is operated to operate the coil hanger connected to the cylinder 15 ( The operation of the gear 24 attached to the coil hanger 23 is made so that 16 is up.

At the same time, when a voltage is applied to the drive motor 18, the drive motor 18 is rotated, power is transmitted to the gear box 19 connected to the motor rotation shaft, and the acceleration and deceleration of the fast rotational speed of the motor is rotated at a constant speed. 17, the gear 20 acting as a tension and guide connected to the middle of the chain 18, the chain 24 is attached to the coil hanger 23 in a predetermined direction, for example, while preventing the chain 17 from being separated. By rotating in the counterclockwise direction, the coil hanger 23 swings down a predetermined angle, for example, 90 ° .

When the coil hanger continues to be down, the sensor 26 detects this and sends an electrical signal to the motor 18 to stop the rotation of the motor 18 by moving the crane to the target point.

When the lifter is positioned on top of the coil 2 at which the crane is at the target point, the lifter 3 is safely lowered.

When the part of the lifter coil hanger 23 descends to the inner diameter of the coil 2, the sensor 27 detects this and sends an electrical signal to a display lamp attached to the upper part of the lifter 3 to light the lamp. An electrical signal is also sent to the drive motor 18 in order to swing the coil 23 up again by 90 °.

When voltage is applied to the drive motor 18, the drive motor 18 rotates in the opposite direction, and power is transmitted to the gearbox 19 connected to the motor rotation shaft, thereby accelerating and decelerating the fast rotational speed of the motor to rotate the chain at a constant speed. Turning (17) rotates the gear 24 attached to the coil hanger 23 in a clockwise direction while the gear 20 serving as a tension and guide connected to the middle of the chain 18 does not escape the chain 17. .

When the coil hanger 23 swings upward by 90 °, the coil hanger 23 is in the up state and becomes a horizontal state in which the coil can be hooked, and the sensor 25 senses this and sends an electrical signal. When the rotation of the motor is stopped by the cylinder 15 operates while the coil hanger 16 is lowered vertically to support the coil hanger 23 from the rear of the coil hanger 23 gear 24 to support the coil hanger 23 does not go down. .

When all the above operations are completed, the operation of the lifter arm 3 switchgear is completed by crossing the lifter arm 3 to raise the coil.

On the other hand, in order to prevent damage due to scratches or the like of the coil outer winding part due to contact between the coil outer winding part and the touch bar, the outer roll scratch preventing crown roll 53 is provided on the lifter arm.

Therefore, as described above, when the lifter arm 3 is crossed, the outer winding portion of the coil is in contact with the crown roll 53. Since the area of the coil touching the crown roll 53 is significantly smaller than that of the conventional touch bar, the coil roll 53 may be contacted without damaging the outer coil portion. At this time, an impact is applied to the crown roll 53, and the roll supports 52, 54 of the crown roll 53 seated on the roll seats 57, 58 move toward the inner base 59 of the lifter arm 3. While pushing, an impact is applied to the buffer springs 55 and 56. The shock is absorbed by the springs 55 and 56 to the extent that the roll supports 52 and 54 are pushed.

At this time, the roll support (52, 54) is pushed in the direction of the lifter arm base 59, the crown roll 53 is also pushed together. When the sensor (60) detects the pushed crown roll (53) of the sensor 60 The signal is sent to a display lamp attached to the upper part of the lifter 3 to light the lamp.

The driver checks the above ramp signal and then hoists the crane lifter arm 3. The outer winding portion of the coil 2 touches the crown roll 53 and rotates. By rotating the crown roll 53, the coil is wound up without damaging the outer winding portion, and the coiled coil is moved to the target point.

After the movement is completed, the coil is in contact with the ground of the yard even when being unloaded, and when the lifter arm 3 is unloaded, the crown roll 53 mounted on the lifter arm rotates in the reverse direction of hoisting to prevent damage to the outer circumference of the coil.

After completion of the unloading operation, when the lifter arm 3 is opened, the tension of the retracted shock absorbing springs 55 and 56 is released and the roll of the crown roll 53 seated on the roll seats 57 and 58 is released. The supports 52, 54 are pushed outward of the inner base 59 of the lifter arm 3. Then, while the contact between the outer roll portion of the coil and the crown roll 53 that has been in contact with the crown roll 53 is broken, the sensor 60 that has sensed the crown roll 53 operates.

That is, the signal from the sensor 60 is sent to the display lamp attached to the upper part to turn on the lamp, and the driver checks the lamp signal and then opens the lifter arm to complete the coil outer wound damage prevention work of the lifter arm 3. And the next work continues.

After the above operation is completed, since the lifter arm 3 coil hanger 23 is 90 ° horizontally with the lifter arm 3, when only the lifter 3 is hoisted with the coil hanger 23 being 90 ° horizontal. Lifter arm (3) Lifting arm (3) The hook hanger 23 is caught on the inner diameter of the coil, causing the entire crane lifter to shake violently, and the coil and the lifter to be damaged together as a result of the coil lifting. The lifter arm (3) must be hoisted in a swinging-down state with the shaft always vertical.

In order to be perpendicular to the lifter arm 3, the coil hanger 16 on the rear part of the coil hanger 23 needs to be UP, which receives an electrical signal from the coil detecting sensor 60 that there is no coil. As the cylinder 15 operates, the coil hanger holder 16 connected to the cylinder 15 is up (UP) to operate the coil hanger 23 and the gear 24.

At the same time, when a voltage is applied to the drive motor 18, the drive motor 18 is rotated and the power is transmitted to the gearbox 19 connected to the motor shaft, while the fast rotation speed of the motor is added to or reduced from the chain at a constant speed. Turning (17) rotates the gear (24) attached to the coil hanger (23) in the counterclockwise direction while preventing the gear (20) acting as a tension and guide connected to the middle of the chain (18) from being detached from the chain (17). The coil hanger 23 swings downward by 90 degrees and goes down.

When the coil hanger continues to be down, the sensor 26 senses this and sends an electrical signal that the 90 degree down is completed. When the motor stops rotating, the lifter 3 is safely lifted.

Follow the above procedure to complete the movement of the coil and perform the transfer operation of the next coil.

Therefore, according to the present invention, it is possible to minimize the coil outer portion stamping phenomenon and the side scratches of the coil that can occur during the process of lifting or unwinding the coil to prevent product quality deterioration, and also coil in a narrow yard space Since it is possible to accumulate a narrow gap between the yard in the same space can be placed a larger amount of coil, there is an effect that can prevent the frequent occurrence of failure of the lifter due to the wear of the lifter touch bar.

The foregoing is merely illustrative of the preferred embodiments of the present invention, and those skilled in the art to which the present invention pertains may make modifications and changes to the present invention without departing from the spirit and the gist of the present invention as set forth in the appended claims. It should be recognized that it can be added.

Claims (4)

A crane lifter having an arm portion for holding a coil to be wound or hoisted, A coil hook which is swingably attached to an end of the arm portion at a predetermined angle; It is mounted to the arm portion is composed of a drive means for swinging the coil hanger at a predetermined angle, The coil hanger swings up to maintain a predetermined angle with the arm portion to hold the coil so that it can be lifted or lowered, and the coil hanger is coupled to the arm portion to release the coil to unload the target point. A crane lifter, characterized in that the swinging down to be parallel. The method of claim 1, A catching member for fixing the rear of the coil hanger to prevent the coil hanger from being held at a predetermined angle with the arm part and forcibly releasing it in a state of holding the coil; and according to a swing state of the coil hanger Crane lifter, characterized in that it further comprises an adjusting means for adjusting the operation of the locking member. A crane lifter having an arm portion for holding a coil to be wound or hoisted, A plurality of crown rolls rotatably installed along an inner surface of the arm portion in contact with a side of the coil; And an elastic member elastically supporting the crown roll so as to absorb the impact applied to the crown roll when gripping the coil. The method of claim 3, The rear of the crown roll is provided with a contact sensor, the crane lifter, characterized in that the gripping operation of the arm portion to the coil is stopped when the crown roll in contact with the side of the coil contacts the contact sensor.