JP2009274815A - Emergency brake device for crane trolley - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively and easily install an emergency brake device. <P>SOLUTION: On a trolley 26, a traverse drive mechanism 34 is provided for driving the rotation of a traverse pinion 36 which engages with a traverse rack 35 placed on a gutter 25, to drive the traverse of the trolley 26. On the trolley 26, an emergency braking motor 64 with a non-exciting operation brake 63 is provided where a brake pinion 62 engaging with the traverse rack 35 is mounted on the output shaft. Power is supplied to an electromagnetic coil 77 of the non-exciting operation brake 63 during traversing movement to make the non-exciting operation brake 63 into a non-operated state so that the brake pinion 62 idles. With the operation of an emergency stop button, power is stopped to be supplied to the electromagnetic coil 77 of the non-exciting operation brake 63 to make the non-exciting operation brake 63 into an operated state so that the brake pinion 62 is braked to stop the trolley 26. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an emergency brake device provided in a trolley that moves laterally on a garter in a transfer crane that handles a large load such as a container.

  For example, as shown in FIG. 7, the trolley of the transfer crane disclosed in Patent Document 1 has the traveling rails 2 laid on a pair of front and rear garters 1 F and 1 R, and travels on the transverse rails 2 at the four corner positions of the trolley 3. The traverse wheel 4 is provided, and the trolley 3 is disposed on the garters 1F and 1R so as to be traversable. Further, the traverse drive device 5 is linked to a traverse rack 6 laid along the front and rear traverse rails 2, a traverse pinion 7 that meshes with the front and rear traverse rack 6, and a propeller shaft 8 that connects the front and rear traverse pinions 7. The traverse motor 9 is connected to the traverse motor 10, and the traverse motor 9 rotates and drives the traverse pinion 7 to traverse the trolley 3.

Conventionally, a rotation detector 12 that is rotated via a chain transmission mechanism 11 is provided on the propeller shaft 8, the position of the trolley 3 is detected by the rotation detector 12, and the traverse motor 9 is stopped at the target position. . The trolley 3 at this time is not braked, and the brake 9a attached to the traverse motor 9 is mainly used when the trolley 3 is parked.
JP 2004-123293 A

  In the prior art, if the traversing pinion 7 is detached from the traversing rack 6, the trolley 3 cannot be stopped, and the brake 9a attached to the traversing motor 9 is also ineffective. Therefore, it is conceivable to install a hydraulic emergency disc brake device that extends the axle of the traversing wheel 4 and attaches a brake disc, and presses the brake disc with a brake shoe. There was a problem that it was expensive.

  An object of the present invention is to solve the above problems and to provide an emergency brake device in a crane trolley that can be easily installed at low cost.

  The invention described in claim 1 includes a trolley (26) disposed on a transverse rail (31) laid on a pair of garters (25) via a transverse wheel (32) so as to be movable transversely, and each transverse rail. A traverse drive device (34) for driving the traverse (26) in a traverse direction by driving a traverse pinion (36) that meshes with a traverse rack (35) laid on the garter (25) along (31). An emergency brake device for a crane trolley, which includes an emergency brake motor (64) with a non-excited brake (63) attached to an output shaft with a brake pinion (62) meshing with each traverse rack (35). ) Is provided to feed the electromagnetic coil (77) of the non-excitation actuating brake (63) during traversing movement to deactivate the non-exciting actuating brake (63) and follow the traversing movement of the trolley (26). The brake pinion (62) is idled and the electromagnetic coil ( 77), the non-excitation brake (63) is operated, the brake pinion (62) is braked, and the trolley (26) is stopped.

  The invention as set forth in claim 2 includes a trolley (26) disposed on a transverse rail (31) laid on a pair of garters (25) via a transverse wheel (32) so as to be movable in a transverse direction, and each transverse rail. A traverse drive device that traverses the trolley (26) by rotating the traverse pinion (36) meshed with the traverse rack (35) laid on the garter (25) along (31) by the traverse motor (39) ( 34) and an emergency brake device for a crane trolley equipped with a non-excited operation brake (63) attached to the output shaft with a brake pinion (62) that meshes with each transverse rack (35). The emergency braking motor (64) is provided, and during traversing movement, power is supplied to the emergency braking motor (64) and the electromagnetic coil (77) of the non-excitation brake (63) to turn off the non-excitation brake (63). The emergency control is performed so that the brake pinion (62) rotates in synchronization with the traverse pinion (36). The rotating motor (64) is rotated, and during an emergency stop, the power supply to the electromagnetic coil (77) of the traverse motor (39), emergency braking motor (64), and non-excitation brake (63) is stopped, respectively The operation brake is operated, the braking pinion (62) is braked, and the trolley (26) is stopped.

  According to the first aspect of the present invention, when an emergency braking motor with a non-excitation actuating brake having a braking pinion that meshes with each traverse rack is attached to the output shaft and the trolley is traversed, the electromagnetic coil of the non-exciting actuating brake The non-excitation brake is deactivated by supplying power to the motor, and the braking pinion is idled following the lateral movement of the trolley. When the trolley is to be stopped urgently, the trolley is stopped via the traverse rack by stopping the power supply to the electromagnetic coil of the non-excitation operation brake, thereby operating the non-excitation operation brake and braking the braking pinion. Therefore, by using an emergency braking motor with a low-cost non-excitation brake, an emergency brake device can be easily added to the existing crane trolley with a simple structure. It can be installed at a low cost of about ¼ compared to adding an emergency disk brake device of the type.

  According to the second aspect of the present invention, when an emergency braking motor with a non-excitation operation brake having a braking pinion meshing with each transverse rack is attached to the output shaft and the trolley is moved laterally, the emergency braking motor and the non-excitation operation are performed. Power is supplied to the electromagnetic coil of the brake to deactivate the non-excitation brake, and the braking pinion is rotated by the emergency braking motor so as to synchronize with the traverse pinion. When stopping the trolley in an emergency, stop the power supply to the electromagnetic coil of the traverse motor, emergency braking motor and non-excitation brake to stop the traverse motor and emergency braking motor and simultaneously operate the non-excitation brake. The trolley can be stopped by braking the brake pinion. Therefore, an emergency brake device can be easily added to an existing crane trolley with a simple structure by using a low-cost emergency brake motor with a non-excitation brake. The emergency braking motor can assist the trolley's traverse driving force. Further, as compared with the conventional case where a hydraulic emergency disc brake device is added to the traversing wheel, it can be installed at a cost of about 1/4.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Embodiment 1]
A first embodiment of an emergency brake device in a trolley for a transfer crane according to the present invention will be described with reference to FIGS.

  As shown in FIG. 2, this transfer crane is arranged in a container yard, for example, and carries out container handling work. Two sets of front and rear traveling wheels 22F, 22R are provided with two wheels on each of the left and right sill beams 21R, 21L. A traveling device 23 is provided. The traveling device 23 is rotationally driven with a first traveling motor 23a connected to the front traveling wheel 22F of the right sill beam 21R via a speed reducer, and the left sill beam 21L diagonally opposite the front traveling wheel 22F. The second traveling motor 23b is connected to the rear traveling wheel 22R via a speed reducer and is rotationally driven.

  In addition, a pair of front and rear columns 24 are erected on the left and right sill beams 21R and 21L, and a garter 25 is spanned between the upper ends of the columns 24 opposed to the left and right of these columns 24. A trolley 26 is disposed on the trolley 26 so as to be movable in a transverse direction. The trolley 26 is provided with an elevating drum (not shown) that is rotationally driven by a hoisting motor 58, which will be described later, and the spreader 28 can be raised and lowered via a plurality of elevating ropes 27 fed out from the elevating drum. The container 29 is held by the spreader 28, lifted and transported. The trolley 26 is provided with a cab 30 for operation.

  As shown in FIGS. 1 and 3, traverse rails 31 are respectively laid on the front and rear garters 25, and traverse wheels 32 provided at the four corner positions of the trolley 26 are guided by the traverse rails 31, respectively. 26 is arranged on the garter 25 so as to be movable in a transverse direction.

  A traverse drive device 34 that traverses the trolley 26 is disposed at front and rear traverse racks 35 laid on the front and rear garters 25 on the inner side of the traverse rail 31 and the left and right positions of the trolley 26. Front and rear traverse pinions 36 respectively engaged with the rack 35, a propeller shaft 37 connecting the front and rear traverse pinions 36 to each other, and an electric traverse motor with a brake 39a connected to the propeller shaft 37 via a speed reduction interlocking device 38. 39. The trolley 26 is provided with a rotation detector (for example, a rotary limit switch) 40 for detecting the traversing position of the trolley 26, and this rotation detector 40 is connected to a propeller shaft via a chain transmission mechanism 41. 37.

  As shown in FIGS. 1 and 5, the power generation drive unit 51 installed on the right sill beam 21 </ b> R is provided with a generator 53 driven by an engine 52. The current generated by the generator 53 is rectified by the rectifier 54 and then supplied to the hoisting motor 58 and the first traveling motor 23a of the trolley 26 through the hoisting / traveling inverter 55, and the traversing inverter 56 is Power is supplied to the traverse motor 39 via the second travel inverter 57 and further supplied to the second travel motor 23 b via the second travel inverter 57. Then, the inverters 44 to 46 are controlled by the operation signal output from the operation device 59 of the driver's seat 30 through the controller 50, respectively, and the hoisting motor 58, the first and second traveling motors 23a and 23b, and the traverse motor are controlled. 39 are respectively controlled.

  The emergency brake device 61 according to the present invention is provided with two sets of front and rear emergency brake motors 64 with non-excitation brakes 63 each having a brake pinion 62 that engages with the front and rear traverse racks 35 attached to the output shaft. It is. The emergency brake motor 64 is not supplied with power, and the brake pinion 62 is held in an idle state. A later-described electromagnetic coil 77 provided in the non-excitation operating brake 63 is supplied with power from the rectifier 54 via an emergency stop switch 65. The emergency stop switch 65 is turned on during normal traverse movement to the electromagnetic coil 77. Power is supplied and the non-excitation operating brake 63 is deactivated. Then, when the emergency stop button 66 disposed in the cab 30 is pressed, the emergency stop switch 65 is turned off via the controller 60, power supply to the electromagnetic coil 77 is stopped, and the non-excitation operation brake 63 is operated.

  That is, as shown in FIG. 4, the non-excitation brake 63 is a spring pressurization brake, and is a brake liner 72 fixed to an extension portion of the output shaft 64 a of the emergency braking motor 64 via the hub 71, and a pressure ring. The armature 73 is pressed by 75a to press the brake liner 72 between the friction plates 74 to brake the output shaft 64a, and the armature 73 is held by the mounting bolt 79 via the brake magnet 76 and pulled. The electromagnetic coil 77 capable of releasing power and the adjustment ring 78 for adjusting the spring force of the pressure spring 75 are provided.

  Therefore, by supplying power to the electromagnetic coil 77, the armature 73 can be drawn against the pressure spring 75 to release the braking of the brake liner 72. Further, by stopping the power supply to the electromagnetic coil 79, the brake liner 72 is clamped between the armature 73 and the friction plate 74 via the pressure ring 75a by the spring force of the pressure spring 75, and the emergency is generated by the friction resistance. The output shaft 64a of the braking motor 64 can be braked and stopped. As a result, the trolley 26 can be stopped via the brake pinion 62 and the transverse rack 35.

  In the above configuration, during normal cargo handling work, an operation signal is output from the controller 60 to the hoist / travel inverter 55 and the second travel inverter 57 by the operation of the operation device 59, and the first travel motor 23a of the travel device 23 and The second traveling motor 23b is driven to travel the stacker crane. Further, an operation signal is output from the controller 60 to the hoisting / running inverter 55, the hoisting motor 58 provided in the trolley 26 is driven, and the spreader 28 is lifted and lowered via the hoisting rope 27. Further, when an operation signal is output from the controller 60 to the traverse inverter 56 and supplied to the traverse motor 39, the traverse pinion 36 is rotationally driven via the propeller shaft 37 and the trolley 26 is traversed. At this time, the position of the trolley 26 is detected by the rotation detector 40, and at the stop position input by the operation device 59, power supply from the traverse inverter 56 to the traverse motor 39 is stopped and the trolley 26 is stopped.

  When it is necessary to urgently stop the trolley 26, the emergency stop button 66 is pressed, power supply to the traversing motor 39 is stopped via the traversing inverter 56 according to a command from the controller 60, and the emergency stop switch 65 is used. Thus, the power supply to the electromagnetic coil 77 of the non-excitation operating brake 63 is stopped. As a result, the non-excitation operating brake 63 is operated, the braking pinion 62 is braked, and the trolley 26 is stopped.

  According to the embodiment described above, the braking pinion 62 that meshes with the transverse rack 35 is provided on the trolley 26 that is transversely moved by the transverse rack 35 and the transverse pinion 36, and the braking pinion 62 is urgently braked with the non-excitation actuating brake 63. It is attached to the output shaft of the motor 64, and during normal traversing movement, power is supplied to the electromagnetic coil 77 of the non-excitation actuating brake 63 so that the non-excitation actuating brake 63 is deactivated. At the time of emergency stop, pressing the emergency stop button 66 stops the power supply to the electromagnetic coil 7 of the non-excitation operation brake 63 when the emergency stop switch 65 is turned off. Thereby, the non-excitation operation brake 63 is operated, the braking pinion 62 is braked, and the trolley 26 can be effectively stopped.

  Therefore, it is only necessary to add an emergency braking motor 64 with a non-excitation operation brake 63 having a braking pinion 62 meshing with the traverse rack 35, an emergency stop switch 65, etc., to the trolley 26, and an emergency brake device can be added to an existing crane with a simple structure. Can be added easily. Further, as compared with the conventional case where a hydraulic emergency disc brake device is added to the traversing wheel 32, the emergency brake can be provided at a cost of about 1/4.

[Embodiment 2]
Embodiment 2 of an emergency brake device in a trolley of a transfer crane according to the present invention will be described with reference to FIG. Note that the same members as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the first embodiment, the emergency braking motor 64 is not supplied with power during traversal movement, and the braking pinion 62 is in an idle state. In the second embodiment, the traverse inverter 56 through the power feeding line 67 is used. Power is supplied to the emergency braking motor 64 so that the transverse pinion 36 and the braking pinion 62 have the same pitch circle diameter, and the emergency braking motor 64 rotationally drives the braking pinion 62 in synchronization with the transverse pinion 36 to drive the trolley 26 in a transverse manner. Is configured to do. Thereby, the driving force of the emergency braking motor 64 can be used for the horizontal movement of the trolley 26 during the horizontal movement.

  According to the above configuration, during traversing movement, power is supplied to the electromagnetic coil 77 of the non-excitation actuating brake 63 to deactivate the non-exciting actuating brake 63 and power is supplied to the emergency braking motor 64 to synchronize with the traverse pinion 36. Then, the emergency braking motor 64 is driven so as to rotate the braking pinion 62, and the power of the emergency braking motor 64 is used for the transverse driving force of the trolley 26. At the time of emergency stop, the emergency stop button 66 is pressed to stop the power supply to the traversing motor 39 and the emergency braking motor 64 via the traversing inverter 56 and to the electromagnetic coil 77 of the non-excitation brake 63 by the emergency stop switch 65. Stop power supply. As a result, the non-excitation brake 63 can be operated to brake the brake pinion 62 and the trolley 26 can be effectively stopped.

  According to the above embodiment, it is only necessary to add the emergency braking motor 64 with the non-excitation operation brake 63 having the braking pinion 62 meshing with the traverse rack 35, the emergency stop switch 65, etc. to the trolley 26, and with a simple structure. An emergency brake device can be easily added to the existing crane. Further, during the traversing movement, the emergency braking motor 64 is powered so that the braking pinion is rotated in synchronization with the traversing pinion 36, whereby the transverse driving force of the trolley 26 can be assisted. . Further, as compared with the conventional case where a hydraulic emergency disc brake device is added to the traversing wheel 32, an emergency brake can be provided at a low cost.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic perspective view which shows Embodiment 1 of the emergency brake apparatus in the crane trolley which concerns on this invention, and shows a trolley. It is a whole perspective view which shows a transfer crane. It is a top view which shows a traverse drive device and an emergency brake device. It is a longitudinal cross-sectional view which shows a non-excitation actuating brake. It is a block diagram which shows the electric drive system of a transfer crane. It is a block diagram which shows Embodiment 2 of the emergency brake apparatus in a crane trolley, and shows the electric drive system of a transfer crane. It is a schematic perspective view which shows the conventional trolley.

Explanation of symbols

21R, 21L Sill beam 22F, 22R Traveling wheel 23 Traveling device 24 Column 25 Gutter 26 Trolley 27 Lifting cable body 28 Spreader 31 Traverse rail 32 Traverse wheel 34 Traverse drive device 35 Traverse rack 36 Propeller shaft 38 Deceleration interlock device 39 Traverse Motor 40 Rotation detector 51 Power generation drive unit 52 Engine 53 Generator 54 Rectifier 59 Controller 60 Controller 61 Emergency brake device 62 Brake pinion 63 Non-excitation actuating brake 64 Emergency brake motor 65 Emergency stop switch 66 Emergency stop button 67 Power supply line 72 Brake Liner 73 Armature 74 Friction plate 75 Pressure spring 77 Electromagnetic coil

Claims (2)

A trolley that is arranged to traverse through traverse wheels on traverse rails laid on a pair of garters, and a traverse pinion that meshes with traverse racks laid on the garter along each traverse rail. An emergency brake device in a crane trolley comprising a traverse drive device for traversing the trolley,
The trolley is provided with an emergency braking motor with a non-excitation actuating brake in which a braking pinion that meshes with each traverse rack is attached to the output shaft,
During traverse movement, power is supplied to the electromagnetic coil of the non-excitation actuating brake to deactivate the non-excitation actuating brake, and the braking pinion is rotated following the traversing movement of the trolley. An emergency brake device in a crane trolley, wherein the power supply to the electromagnetic coil of the crane is stopped, the non-excitation brake is operated, the braking pinion is braked, and the trolley is stopped. A trolley arranged on a traverse rail laid on a pair of garters so that it can traverse through traverse wheels and a traverse pinion that meshes with a traverse rack laid on the garter along each traverse rail are rotated by a traverse motor. An emergency brake device in a crane trolley having a traverse drive device for driving and traversing the trolley,
The trolley is provided with an emergency braking motor with a non-excitation actuating brake in which a braking pinion that meshes with each traverse rack is attached to the output shaft,
When traversing, the emergency braking motor and the electromagnetic coil of the non-excitation actuating brake are powered to deactivate the non-exciting actuating brake and the emergency braking motor is rotated so that the braking pinion rotates in synchronization with the traversing pinion. Rotate and stop the power supply to the electromagnetic coil of the traverse motor, emergency braking motor and non-excitation brake to operate the non-excitation brake and brake the pinion to stop the trolley at the time of emergency stop An emergency brake device in a crane trolley characterized by comprising.

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