KR20050005068A - An apparatus for braking a crane in emergency during operations - Google Patents

Abstract

PURPOSE: An emergency braking device while traveling a crane is provided to prevent the crane from being bumped into the surrounding equipments, and to restrict damage of materials and products by stopping the crane with inertia of travel in cutting off power. CONSTITUTION: An emergency braking device is composed of a gear locking unit(10) having a cylindrical member(9) mounted to a travel driving shaft(5) connecting a decelerator to a travel wheel, a latch(15) combined with a gear unit, a pulling cylinder(17) separating the latch from the gear unit and a spring(20) combining the latch with the gear unit and braking first in cutting off power, and a drum braking unit(50) having a brake shoe combined with a drum part of the cylindrical member and a chain(55) pulling the brake shoe and braking secondarily by pulling and winding the chain on a chain winding unit(60) with operation of the latch of the gear locking unit.

Description

Emergency braking system for running cranes {AN APPARATUS FOR BRAKING A CRANE IN EMERGENCY DURING OPERATIONS}

The present invention relates to an emergency braking device for sudden braking of a traveling device in case of an emergency sudden occurrence of a ceiling crane carrying materials and products in a steel mill rolling area. Emergency emergency braking device during crane operation improved to prevent the crane from colliding with the adjacent equipment and to prevent material and product damage by braking the crane by using the inertia of the crane when an accident occurs when the power is cut off due to an abnormality. It is about.

In general, overhead cranes are driven to a target point after hoisting materials and products to a safe height. Normally, a braking brake is mounted on a crane by employing a thruster brake.

The brakes used in such cranes typically use magnet brakes, thruster brakes and hydraulic disc brakes. In the above, the magnet brake is used for the lifting and lowering of the sudden braking under the vertical load, and the hydraulic disc brake is partially used in the fixed cab crane, but the thruster brake is shown in FIG. 1 and FIG. By brake lining of the brake shoes on both sides.

In FIG. 1, the ceiling crane 100 is illustrated as a plane, and the driving wheel 116 moves on the support rails 102 disposed on both sides of the ceiling crane 100, and the driving wheel 116. Equipped with driving motors 110 on both sides for driving forward and reverse rotation, respectively. The thrust brake 120 is mounted to the traveling motor 110 of the ceiling crane 100.

That is, as shown in FIG. 1, driving motors 110 are mounted on both sides of the crane 100, respectively, and the output shaft 112 of the driving motor 110 operates the driving wheels 116 through the reducer 114. In the travel system, it is arranged to control the rotation shaft 118 on the opposite side of the output shaft 112 of the travel motor 110.

As shown in FIG. 2, the thrust brake 120 includes a drum 124 having a rotation shaft 118 of the traveling motor 110 connected to the center thereof, and a brake shoe that is tightened to the left and right sides of the drum 124. 126 and a motor pump 130 and a link mechanism 132 for generating the tightening operation of the brake shoe 126.

Therefore, the thrust brake 120 is gradually braked when the driving stops, and the braking distance (about 10-15M) becomes long. However, when the brake brake is stopped in this manner, the hoisting device of the crane 100 ( There is an advantage that can prevent the shaking (not shown) is used in the traveling device.

However, if an abnormality occurs in the power system while driving and the power supply is unexpectedly cut off, the braking distance (10-15M), which is an advantage in general, may not operate normally because the motor pump 130 is stopped and the brake is stopped. It has a long problem that is expected to cause a large accident due to collisions with adjacent facilities and collisions with adjacent cranes. The reason is that because the weight of the ceiling crane 100 is very large, the inertial force during the driving in one direction is very large so that sudden failure of the braking device causes the ceiling crane 100 to move excessively in the driving direction, and this process Will cause various equipment accidents.

Therefore, when the power supply to the overhead crane 100 is unexpectedly cut off, the need to emergency stop the crane 100 has emerged.

The present invention is to solve the conventional problems as described above, the object is that the power supply during the operation of the overhead overhead crane during the operation of the power supply is

At the same time, by providing braking even when the power is not supplied at the same time, it provides an emergency emergency braking system during crane driving to shorten the mileage of the ceiling crane and to prevent large-scale equipment accidents caused by equipment collisions. Is in.

1 is a plan view of a typical overhead crane;

2 is a cross-sectional view showing a trust brake provided in a overhead crane according to the prior art;

3 is a plan view showing a overhead crane equipped with an emergency braking device while driving a crane according to the present invention;

4 is an external perspective view showing the emergency braking device while running the crane according to the present invention;

5 is a plan view in which the emergency braking device while driving the crane according to the present invention is mounted in directions opposite to each other on the traveling drive shaft of the ceiling crane;

6 is an operation explanatory diagram showing a state in which the emergency braking device while the crane driving in accordance with the present invention operates.

7 is an explanatory view showing a state in which the emergency braking device while running the crane according to the present invention operates in a direction different from that of FIG. 6;

8 is an exploded view showing the detailed structure of the brake shoe member provided in the emergency braking device while running the crane according to the present invention.

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

1 .... emergency braking 5 .... drive shaft

10 ... Gear lock unit 12a ... Drum section

12b ... gear 15 .... hook

20 .... Spring 22 .... Bracket

50 .... drum braking unit 52 .... arc shaped shoe member

60 ... chain winding 70 ... one-way clutch

74 .... Multiple support frames 80 .... Lever

82 .... Spring 86 .... Leaf Spring

88 .... long hole 94 .... nut

99 .... toothed gear 100 .... overhead crane

110 ... running motor 114 .... reducer

118 .... axis of rotation 120 .... trust brake

124 .... drums 126 .... brake shoes

130 .... Motor Pump 132 .... Linkage Mechanism

In order to achieve the above object, the present invention, in the emergency braking device for braking the traveling device in the event of an emergency sudden situation during the running of the overhead crane carrying steel mill rolling material and products,

A cylindrical member is mounted on a driving drive shaft connecting the reducer and the driving wheel, and has a hook for coupling to the gear of the cylindrical member, and a pull cylinder for separating the hook from the gear and a spring for coupling the hook to the gear. Gear lock unit is coupled to the gear by the action of the spring when the power is cut off to achieve the primary braking; and,

The drum is provided with a brake shoe member that is engageable with a drum unit provided on one side of the cylindrical member, and has a chain for pulling the shoe member, and the drum is pulled and wound around the chain winding mechanism by the hook operation of the gear locking unit. By providing an emergency braking device for driving a crane, characterized in that it comprises a; and a drum braking unit for the secondary braking by the brake shoe member.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The emergency braking device 1 while driving the crane according to the present invention includes the gear lock unit 10 and the drum braking unit 50 as one set, one set in the forward direction, and the other set in the opposite direction. 5) installed side by side is configured to operate during sudden braking of the crane (100).

The gear locking unit 10 and the drum braking unit 50 each constitute a set, which is shown in FIG. 4, which is shown in FIG. 4 in the opposite direction parallel to each other on the driving drive shaft 5. It is arranged as shown in 5.

As described above, the present invention is mounted on the driving drive shaft 5 connecting the reducer 114 and the driving wheel 116 as shown in FIG. . That is, one set mainly performs the braking operation through the drum braking unit 50 during the emergency braking of the crane 100, and the other set mainly makes the emergency braking through the gear locking unit 10, and its configuration or operation The principle is the same.

Therefore, hereinafter, only one of the two sets will be described in detail, and the other will have the same function as the same configuration, and thus a detailed description thereof will be omitted.

The gear locking unit 10 and the drum braking unit 50 have a cylindrical member 9 coupled to the driving drive shaft 5 through a key 7, and the cylindrical member 9 has one side of an outer surface thereof. The round drum part 12a is formed and the other side has the gear part 12b which the diameter expanded.

The gear locking unit 10 has a cylindrical member 9 mounted on the driving drive shaft 5 connecting the reduction gear 114 and the driving wheel 116, and is coupled to the gear 12b of the cylindrical member 9. With a hook 15 to the hook, and having a pull cylinder 17 for separating the hook 15 from the gear 12b and a spring 20 for coupling the hook 15 to the gear 12b. In the event of accidental interruption of the crane power source, the hook 15 is engaged with the gear 12b by the action of the spring 20 to achieve primary braking.

The gear locking unit 10 has a hook-shaped structure 15 to be caught by the gear 12b, and the hook 15 is fixed to the upper surface of the overhead crane 100 in the middle thereof. It is mounted so as to be rotatable through the hinge shaft 23 of the bracket 22, the lower end is connected by the spring 20 is supported laterally, the upper end of the hook 15 is pulled to one side cylinder 17 ) Is mounted.

In the pull cylinder 17 and the spring 20 is the other end is fixed to the bracket (27a) 27 fixed to the upper surface of the overhead crane (100).

The pull cylinder 17 is a solenoid-operated type so that the rod is always pulled by the power of the ceiling crane 100 so that the upper end of the hook 15 is pulled out of the gear 12b.

In addition, the gears of the gear 12b each form one inclined surface 13, so that even if the tip of the hook 15 is coupled to the gear 12b, the gear 12b is rotated. If the inclined surface 13 and the hook 15 is in contact with each other, the hook 15 prevents the rotation of the gear 12b and the tip of the hook 15 is slid by the inclined surface 13 so as to fall off. give. In other words, the hook 15 is to allow the rotation of the gear 12b by going over the inclined surface while preventing the rotation of the gear 12b.

In addition, the lower end of the hook 15 is supported to be pulled to the rear side by the spring 20, if the pull cylinder 17 is in operation, as shown in solid lines in Figures 5 and 6, the hook ( Although the upper end of 15) remains separated from the gear 12b, when the power applied to the pulling cylinder 17 (crane power supply) is shut off and stopped, the hook 15 is driven by the force of the spring 20. By pulling the lower end, as shown by the dashed line of Figures 4 and 6, the upper end of the hook 15 is to be pulled to engage in close contact with the gear 12b.

And, the present invention is provided with a brake shoe member 52 which can be coupled to the drum portion 12a provided on one side of the cylindrical member 9, and has a chain 55 for pulling the shoe member 52, By pulling the chain 55 around the chain winding mechanism 60 by the operation of the hook 15 of the gear lock unit 10, the drive shaft 5 by the drum portion 12a and the brake shoe member 52 is closed. And a drum braking unit (50) which achieves secondary braking.

The drum braking unit 50 is operated by the gear locking unit 10 and includes an arc-shaped shoe member 52 surrounding the drum portion 12a, and the shoe member 52 has an outer surface thereof. The inner peripheral surface of the friction lining 62 is firmly adhesively fixed, one end of the iron plate of the shoe member 52 is fixed to the base 64, the other end is extended through the chain 55, long It is connected to the winding of the chain winding mechanism 60.

The base 64 is also a structure fixed to the upper surface of the ceiling crane (100).

In addition, the chain 55 is changed in direction through a plurality of idle tooth teeth 66 and is wound around the chain winding mechanism 60.

As the winding mechanism 60 is shown in Figure 4, the inner circumferential rotation shaft 72 of the one-way clutch 70 is connected to the rotation shaft of the winding mechanism 60, the winding mechanism 60 is a plurality of supports It is supported by the frame 74 to be rotatable. In addition, the outer circumferential portion of the one-way clutch 70 is connected to the lower end of the lever 80 extending toward the hook 15.

And, one side of the lever 80 is supported to contact the lower end of the hook 15 of the gear locking unit 10 by a spring 82. Therefore, when the lower end 15a of the hook 15 is advanced to the front side, the upper end of the lever 80 is advanced to rotate the outer circumferential surface of the one-way clutch 70 in one direction, and the lower end of the hook 15 is the first. When returning to the position, the lever 80 rotates the inner circumferential rotation shaft 72 of the one-way clutch 70 in the same direction while rotating the outer circumferential surface of the one-way clutch 70 in the opposite direction and rotates the winding mechanism 60. Let's do it.

Accordingly, the one-way clutch 70 does not have a winding operation when the lever 80 is rotated forward, but on the contrary, when the reverse rotation is performed, the chain 70 is rotated on the outer surface of the winding mechanism 60 by rotating the winding mechanism 60. 55) to be wound.

On the other hand, in order to prevent the lining 62 of the shoe member 52 is in close contact with the drum 12a, as shown in detail in FIGS. 7 and 8 outside the iron plate of the shoe member 52, The leaf spring 86 which consists of arc-shaped iron is arrange | positioned.

As the leaf spring 86 is shown in detail in FIG. 7, one end thereof is fixed to the base 64a, the other end extends in an arc shape along the shoe member 52, and the leaf spring 86 has a plurality of Long holes 88 are formed in the lengthwise direction, and bolts 90 are inserted into the long holes 88 to be fixed to the outer surface of the iron plate of the shoe member 52, and the springs 92 are arranged on the outer circumferential side of the leaf spring 86. ) Are each fitted to be fixed with a nut 94.

Therefore, the shoe member 52 is supported by the leaf spring 86 to form a more stable arc, and forms a clearance P of approximately 2 mm with respect to the outer circumferential surface of the drum portion 12a.

On the other hand, the chain 55 is provided with a chain tension adjusting device 95 on one side in order to maintain its constant tension. The chain tension adjusting device (95) is equipped with an idle tooth (99) at the tip of the push bar (97), the inside of which is provided with a spring (not shown), the idle tooth (99) is a chain 55 side As it is in close contact with, when the idle tooth tooth 99 pushes the chain 55 to one side, the chain 55 passes through it and the tension is adjusted.

According to the present invention configured as described above, the gear locking unit 10 and the drum braking unit 50 are set as one set, and these sets are mounted on the driving drive shaft 5 in opposite directions to each other, and two sets are mounted.

As shown in FIG. 5, when there is no abnormality in the usual crane power supply, the solenoid coil (not shown) of the pulling cylinder 17 is normally supplied with the hook 15 and the toothed portion 12b separated from each other. It shows the status of normal work.

At this time, when the overhead crane 100 is operating in the forward direction 25, that is, when a power failure and an emergency accident occurs in the running state, the power of the solenoid coil of the pulling cylinder 17 is cut off, so that the pulling ability of the hook 15 It is lost. Therefore, due to the action of the pull spring 20 mounted on the lower end of the hook 15, the upper end of the hook 15 is tightly coupled to the gear 12b as shown in Figure 4, the gear of the gear 12b The upper end of the hook 15 to the field is in close contact with the action force of the pulling spring 20 to impart rotational resistance to the gear 12b, thereby making primary emergency braking.

In this way, in the first emergency braking process, when the upper end of the hook 15 is not braked only by coupling the hook 15 and the gear 12b (when driving at maximum speed), the hook 15 is geared. By moving the hooks 15 forward and backward while riding over the teeth of the part 12b, the one-way clutch 70 moves by the movement of the lever 80 so as to move the lever 80 which is in close contact with it. 60, the chain winding mechanism 60 is moved as the chain 55 is wound around the chain 55 by pulling the chain 55, so that the brake shoe member 52 surrounding the drum portion 12a drum portion ( 12a) and secondary braking.

That is, when the running speed of the crane is not fast and the gear 12b and the hook 15 are not coupled, the hook 15 is moved back and forth to operate the one-way clutch 70 left and right through the lever 80. The one-way clutch 70 rotates the chamber winding mechanism 60, pulls the chain 55, and rubs the lining 62 and the drum portion 12a to stop.

The friction braking is performed by the one-way clutch 70 until the rotation of the driving drive shaft 5 stops, so that the overhead crane 100 does not stop, and as the vehicle moves, the driving drum braking unit 50 is braked more strongly. Done.

As such, the brake shoe member 52 is in close contact with the drum portion 12a by pulling the chain 55, and the clearance P between the brake shoe member 52 and the drum portion 12a is 2 mm. At this time, the distance at which the lining 62 of the shoe member 52 comes into contact with the drum portion 12a to start braking may be configured such that the one-way clutch 70 is operated so that the chain 55 is pulled by a predetermined distance approximately 13 mm. It is.

That is, when the gear of the lock gear 12b is operated one pitch, the one-way clutch 70 is operated once, and thus, the distance in which the chain 55 is wound when the one-way clutch 70 is operated once. When the gear lock unit 10 is pitched a large number of times, the friction between the lining 62 and the drum 12a is achieved, and if an emergency sudden situation occurs while the overhead crane 100 is traveling, the running shaft rotates only slightly. Can be braked quickly.

When the one-way clutch 70 returns to its original state after an accidental occurrence, the operator pushes the built-in one-way clutch 70 release port (not shown) to remove the locking function of the one-way clutch 70. 55 is released from the chain winding mechanism 60 due to the pulling action of the spring 20 is possible to return to the original.

On the other hand, in the present invention, the braking operation is also performed in the second set mounted on the contrary, and since the rotation of the gear 12b is reversed with respect to the second set of hooks 15, the second set of hooks 15, the side opposite the inclined surface 13 of the gear 12b is in contact with the upper end of the hook, so that the gear locking unit 10 mainly acts so that the hook 15 is opposite the inclined surface 13 of the gear 12b. It comes in contact with the brakes.

Of course, in the case of the high speed running of the crane in the second set, the hook 15 is dropped from the gear 12b and braking by the drum braking unit 50 is performed.

In this operation, even if an electrostatic accident occurs while reversing the ceiling crane 100, the braking function is performed in the same principle as described above. In this case, in the present invention, the second set is mainly braked by the drum braking unit 50, and the first set is braking through the gear locking unit 10.

In this case, when the overhead crane 100 moves backward, the driving drive shaft 5 is operated in a direction opposite to the rotational direction of the driving drive shaft 5 when the crane moves forward, so that the first and second sets of gears The locking unit 10 and the drum braking unit 50 function opposite to each other to realize a braking function.

According to the present invention as described above, the secondary crane in place of the conventional thruster brake 120 in order to emergency braking the ceiling crane 100 in the event of an emergency accident, such as when the power supply is suddenly cut off while the ceiling crane 100 is running. Driving braking is performed.

As described above, according to the present invention, when the power supply is lost due to a power failure caused by a power failure or an abnormal driving power generated during the transportation of the material and the product, only the conventional thrust brake 120 may brake the driving. It is possible to prevent the large accidents caused by the collision of the facility or the collision with the adjacent crane 100 by reducing the traveling braking distance by the braking operation of the traveling braking device installed for emergency.

That is, even if the crane power is cut off, the emergency stop of the overhead crane can be achieved by braking the traveling drive shaft 5 which rotates while the traveling wheel 116 rolls the rail 102 over one or two cars.

Claims (5)

In the emergency braking device that suddenly brakes the traveling device when an emergency accident occurs during the operation of the overhead crane 100 carrying the steel mill rolling area materials and products, The cylindrical member 9 is mounted on the driving drive shaft 5 connecting the reduction gear 114 and the driving wheel 116, and has a hook 15 coupled to the gear 12b of the cylindrical member 9. And a pull cylinder 17 for separating the hook 15 from the gear 12b and a spring 20 for coupling the hook 15 to the gear 12b to cut off the power ( Gear lock unit (10) that the hook 15 is coupled to the gear 12b by the action of the 20 to make the primary braking; and, It is provided with a brake shoe member 52 that can be coupled to the drum portion 12a provided on one side of the cylindrical member 9, and has a chain 55 for pulling the shoe member 52, the gear lock unit 10 The drum braking unit (50) which makes secondary braking by the drum unit (12a) and the brake shoe member (52) by pulling the chain (55) around the chain winding mechanism (60) by the operation of the hook (15). Emergency braking device while driving a crane, characterized in that it comprises a. According to claim 1, wherein the gear locking unit 10 and the drum braking unit (50) each constitute a set, characterized in that the structure is arranged in the opposite direction parallel to each other on the driving drive shaft (5) Emergency braking system while running crane. According to claim 1, wherein the teeth of the gear portion (12b) is formed on each side of the inclined surface 13, the rotation of the gear portion (12b) in the state in which the front end of the hook 15 is coupled to the gear portion (12b) When the inclined surface 13 and the hook 15 come into contact with each other, the hook 15 prevents the rotation of the gear 12b and the tip of the hook 15 slides due to the inclined surface 13. The emergency braking device during the crane driving, characterized in that the fall to fall, and to prevent the rotation of the gear portion (12b) to move over the inclined surface to rotate the gear portion (12b). 2. The emergency braking according to claim 1, wherein the cylindrical member (9) has a rounded drum portion (12a) on one side of its outer surface, and a gear (12b) having an enlarged diameter on the other side. Device. According to claim 1, wherein the chain 55 is provided with a chain tension adjusting device (95) on one side to maintain a constant tension, the chain tension adjusting device (95) at the tip of the push bar (97) The idle tooth tooth 99 is mounted, and a spring (not shown) is provided therein so that the idle tooth tooth 99 is in close contact with the side of the chain 55 so that the idle tooth tooth 99 is connected to the chain 55. When pushed to one side inclined, the chain 55 is emergency emergency braking device while running characterized in that the tension is controlled structure.