JPH11292463A - Crane equipment - Google Patents

Abstract

(57) [Problem] To provide a crane device which can be easily maintained and inspected, and can simplify the device structure and reduce the weight. SOLUTION: A main trolley is provided with a traverse drive device 21 to be a self-propelled main trolley 22, and a catenary trolley is provided with a traverse drive device 23 to be self-propelled catenary trolleys 24, 25, and a traverse drive device for the self-propelled main trolley 22. 21 and the traversing drives 23 of the self-propelled catenary trolleys 24 and 25 are provided with traversing position detectors 31, 35 and 36, respectively, and the position signals 32, 37 and 38 from the traversing position detectors 31, 35 and 36 are provided.
Enter the self-propelled main trolley 22 and self-propelled catenary trolley 2
4 and 25 and a controller 34 for controlling the traversing position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane device used for cargo handling equipment such as a container crane.

[0002]

BACKGROUND ART FIGS. 6 and 7 shows an example of a container crane, the container crane, the land side rail R ₁ and seaward rails R ₂ laid in quay G facing the port S,
A traveling body 2 having legs 1a and 1b traveling on these rails R ₁ and R ₂ , a girder 3 provided substantially horizontally above the traveling body 2, and a gutter 3 bounces upward at the tip of the girder 3. A boom 4 pivotally supported so as to be rotatable, a main trolley 5 traversing the girder 3 and the boom 4, and a head block 6 suspended from the main trolley 5 and capable of moving up and down with respect to the main trolley 5. And a spreader 7 mounted on the head block 6 and capable of locking the container C.

Further, in a large container crane, the first catenary trolley 19 is located closer to the base end of the girder 3 than the main trolley 5 and traverses the girder 3 and the boom 4.
And the second catenary trolley 20 located on the tip side of the boom 4 with respect to the main trolley 5 and traversing the girder 3 and the boom 4.
And

In the above-described container crane, the traveling body 2 moves with respect to the quay G, the main trolley 5 traverses the girder 3 and the boom 4, and the head block 6 moves with respect to the main trolley 5.
Of the container C from the ship V to the quay G, or loading of the container C from the quay G to the ship V, by combining the operations of lifting and lowering the container C and locking and separating the container C by the spreader 7.

A machine room 8 located above the girder 3 includes:
Boom hoisting drum 11 and hoisting drums 15a, 15
b, a main trolley traverse drum 13 and catenary trolley traverse drums 9a and 9b are arranged.

[0006] When the boom hoisting drum 11 is rotated forward and backward, the boom hoisting rope 12 is wound up or extended with the rotation of the boom hoisting drum 11, so that the elevation angle of the boom 4 with respect to the girder 3 changes.

When the hoisting drum 15a and the other hoisting drum 15b are rotated in opposite directions, the hoisting drum 1
5a, and is hung on the main trolley 5 through the base end of the girder 3 and then again through the distal end of the boom 4.
The pull-up and pull-up of the hoisting rope 16 wound on another hoisting drum 15b via the base end side of the girder 3 and the head block 6 is moved up and down with respect to the main trolley 5. I do.

When the main trolley traverse drum 13 is rotated forward and backward, both ends are locked to the main trolley traverse drum 13 and an intermediate portion is engaged with the main trolley 5 via the base end side of the girder 3. The winding or unwinding of the traversing rope 14a and the main trolley traversing rope 14b whose both ends are locked to the main trolley traversing drum 13 and the intermediate portion of which is engaged with the main trolley 5 via the front end side of the boom 4, The main trolley 5 traverses toward the proximal end of the girder 3 or the distal end of the boom 4.

When the catenary trolley traverse drums 9a, 9b are rotated in the normal and reverse directions, the respective ends are locked by the catenary trolley traverse drums 9a, 9b, and the intermediate portion passes through the base end side of the girder 3 to the first catenary trolley 19. The catenary trolley traversing rope 10b which engages, and the catenary trolley traversing rope 10b whose ends are locked to the catenary trolley traversing drums 9a, 9b and whose intermediate portion engages with the second catenary trolley 20 via the tip side of the boom 4 And the catenary trolleys 19 and 20 are traversed toward the base end of the girder 3 or the tip end of the boom 4 by the catenary trolley connecting rope 17 for connecting the catenary trolleys 19 and 20 to each other.

The catenary trolley traverse drums 9a, 9
b is configured to rotate in synchronization with the main trolley traversing drum 13, so that the first catenary trolley 19 is positioned between the base end of the girder 3 and the main trolley 5. The trolley 5 moves following the main trolley 5, and the second catenary trolley 20 moves following the main trolley 5 so that the second catenary trolley 20 is located between the tip side of the boom 4 and the main trolley 5.

Further, both catenary trolleys 19 and 20 include:
Rollers (not shown) that support the hoisting ropes 16a and 16b from below are pivotally supported, and the rollers of the first catenary trolley 19 cause the base end side of the girder 3 and the main trolley 5 to rotate.
Hoisting rope 16 having a large diameter between
a, 16b is prevented from being excessively loosened, and the hoisting rope 1 having a large diameter between the distal end side of the boom 4 and the main trolley 5 is controlled by the roller of the second catenary trolley 20.
Excessive slack of 6a and 16b is suppressed. At this time, the main trolley traverse ropes 14a and 14b and the catenary trolley traverse rope 10 having a relatively small diameter are used.
In a and 10b, slack does not occur by applying a predetermined tension by a take-up device that pulls a tension pulley (not shown) by a cylinder.

[0012]

However, in the conventional crane apparatus, hoisting ropes 16a and 16b for lifting and suspending the head block 6 of the main trolley 5 are used.
In addition to the main trolley traverse ropes 14a, 14
b and the catenary trolley traversing ropes 10a and 10b, a large number of ropes are complicatedly complicated on the girder 3 and the boom 4, and the winding drum 15
a and 15b, a main trolley traverse drum 13 and a catenary trolley traverse drum 9a and 9b are provided, and the pulley has a complicated configuration with a large number of pulleys. However, the maintenance is very difficult, and the weight of the entire apparatus is increased, so that it is necessary to increase the rigidity of the entire crane apparatus.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a crane device which can be easily maintained and inspected, and can simplify and reduce the structure of the device.

[0014]

In order to achieve the above object, a crane apparatus according to the present invention comprises a main trolley capable of traversing a girder and a boom connected substantially horizontally, a main trolley fed from a hoisting drum and having a girder proximal side. A hoisting rope wound on the main trolley via the boom tip side and then again on the main trolley via the boom tip side and further wound on another hoisting drum via the girder base end side; and a girder base end of the main trolley. And a first catenary trolley that can traverse the girder and the boom and supports a predetermined portion of the hoisting rope from below, and traverses the girder and the boom positioned at the boom tip side of the main trolley. In a crane apparatus having a second catenary trolley obtained and supporting a predetermined portion of the hoisting rope from below, the main trolley is provided with a traversing drive device to be a self-propelled main trolley. A self-propelled catenary trolley is provided with a traverse drive device on the trolley, and the traverse drive device of the self-propelled main trolley and the traverse drive device of the self-propelled catenary trolley are each provided with a traverse position detector, and the position from each traverse position detector is provided. A controller for inputting a signal to control a traversing position of the self-propelled main trolley and the self-propelled catenary trolley.

Also, at any position of the girder and the boom,
A proximity switch that detects passage of the self-propelled main trolley and the self-propelled catenary trolley and outputs a position correction signal to the controller is provided.

In the crane apparatus according to the present invention, the self-propelled main trolley and the self-propelled catenary trolley are made to run by themselves, so that the conventional main trolley traversing rope and catenary trolley traversing rope are eliminated and the configuration on the girder and the boom is realized. Can be simplified, and the main trolley traverse drum, catenary trolley traverse drum, and a large number of pulleys can also be omitted, so that the configuration can be further simplified, so that the number of maintenance and inspection points is significantly reduced and maintenance becomes easy. In addition, the weight of the entire apparatus can be reduced, and the rigidity of the entire crane apparatus can be reduced.

Further, at any position of the girder and the boom,
By providing a proximity switch that detects the passage of the self-propelled main trolley and the self-propelled catenary trolley and outputs a position correction signal to the controller, the positions of the self-propelled main trolley and the self-propelled catenary trolley can be accurately controlled.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 5 show an embodiment of a crane device according to the present invention. In the drawings, the portions denoted by the same reference numerals as those in FIGS. 6 and 7 represent the same components.

This crane device, as shown in FIG.
The main trolley 5 is provided with a traverse drive device 21 to be a self-propelled main trolley 22, and the catenary trolleys 19 and 20 are provided with a traverse drive device 23 to be self-propelled catenary trolleys 24 and 2.
5 is assumed.

FIGS. 2 to 4 show an example of the self-propelled main trolley 22. A trolley body 28 which runs on rails 26 provided on the girder 3 and the boom 4 via wheels 27 is provided. The wheels 2 are connected to the trolley body 28 via the speed reducer 30.
7 is provided with a traversing drive device 21 including a motor 29 for driving the motor 7.

A traverse position detector 31 such as an encoder for detecting the position of the self-propelled main trolley 22 by detecting the number of rotations of the wheel 27 is provided on the shaft for driving the wheel 27 of the speed reducer 30. The position signal 32 detected by the traversing position detector 31 is transmitted to the self-propelled main trolley 22 as shown in FIG.
The guide is guided to a controller 34 installed in an operator's cab 33 provided so as to travel integrally.

Further, the self-propelled catenary trolleys 24, 25
Also, as shown in FIG. 1, a traversing drive device 23 is provided similarly to FIGS. 2 to 4 and a self-propelled catenary trolley 24, 2 is provided.
5, traverse position detectors 35 and 36 for detecting the position
The position signals 37, 37 detected by the traversing position detectors 35, 36,
38 is led to the controller 34.

As shown in FIG. 1, proximity switches 39, 40 for detecting the passage of the self-propelled main trolley 22 are provided at positions sandwiching the connection point between the girder 3 and the boom 4, and the self-propelled catenary trolleys 24, Proximity switches 41 and 42 for detecting passage of the self-propelled catenary trolleys 24 and 25 are provided at arbitrary positions in a range where the 25
9, 40, 41, and 42 are the detected position correction signals 43,
44, 45, and 46 are output.

The controller 34 controls the traverse position of the self-propelled main trolley 22 by outputting a control signal 47 to the traverse drive device 21 of the self-propelled main trolley 22 as shown in FIG. And the self-propelled catenary trolley 24 is located at an intermediate position between the base end of the girder 3 and the self-propelled main trolley 22 in accordance with the traversing position of the self-propelled main trolley 22, and The follow-up control signals 48 and 49 are output to the self-propelled catenary trolleys 24 and 25 so that 25 is located at an intermediate position between the tip side of the boom 4 and the self-propelled main trolley 22.

The operation of the apparatus shown in FIGS. 1 to 4 will be described below with reference to the control flow of FIG.

When an operator operates an operation lever or the like in the cab 33, a control signal 47 is output to the traversing drive device 21 (FIG. 1) of the self-propelled main trolley 22, and the traversing position of the self-propelled main trolley 22 is controlled. Is done. At this time, since the traversing position of the self-propelled main trolley 22 is detected by the traversing position detector 31 and the position signal 32 is input to the controller 34, the self-propelled catenary trolley 24 is controlled by the following control signal 48 from the controller 34.
Is located at an intermediate position between the base end of the girder 3 and the self-propelled main trolley 22, and the position of the self-propelled catenary trolley 25 is controlled by the follow-up control signal 49 from the controller 34.
Is automatically controlled to be at an intermediate position between the tip side of the vehicle and the self-propelled main trolley 22.

Further, at this time, the traverse of the self-propelled main trolley 22 is detected by the proximity switches 39 and 40, and from the zero point in the land and sea travel of the self-propelled main trolley 22 detected by the proximity switches 39 and 40. The position signal 3 from the traversing position detector 31 is obtained by the position
2 is corrected.

Further, the respective traverses of the self-propelled catenary trolleys 24 and 25 are detected by the proximity switches 41 and 42, and from the zero point of the traverse of the self-propelled catenary trolleys 24 and 25 detected by the proximity switches 41 and 42. Of the traversing position detector 3 based on the position correction signals 45 and 46,
The position signals 37, 38 from 5, 5 are corrected.

As described above, the self-propelled main trolley 22 and the self-propelled catenary trolleys 24 and 25 can self-run on the girder 3 and the boom 4, and can reliably control the traversing position.

Therefore, in the crane apparatus of the present invention, the self-propelled main trolley 22 and the self-propelled catenary trolleys 24 and 25 are made to self-propelled, thereby eliminating the conventional main trolley traversing rope and catenary trolley traversing rope, thereby eliminating the girder. 3
In addition, the structure on the boom 4 can be simplified, and the drum for the main trolley traverse, the catenary trolley traverse, and a large number of pulleys can be omitted. As a result, the maintenance becomes easy, the weight of the entire apparatus can be reduced, and the rigidity of the entire crane apparatus can be reduced.

It should be noted that the crane device of the present invention is not limited to only the above-described embodiment, and it goes without saying that changes can be made without departing from the spirit of the present invention.

[0033]

As described above, in the crane device of the present invention, the self-propelled main trolley and the self-propelled catenary trolley are made to run by themselves, eliminating the conventional main trolley traverse rope and catenary trolley traverse rope. The structure on the girder and the boom can be simplified, and the drum for the main trolley traverse, the catenary trolley traverse, and a large number of pulleys can be omitted. As a result, the maintenance becomes easy, the weight of the entire apparatus can be reduced, and the rigidity of the entire crane apparatus can be reduced.

Also, at any position of the girder and the boom,
Provision of a proximity switch that detects the passage of the self-propelled main trolley and the self-propelled catenary trolley and outputs a position correction signal to the controller has the effect of accurately controlling the positions of the self-propelled main trolley and the self-propelled catenary trolley. .

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a self-propelled main trolley and a self-propelled catenary trolley as viewed from a side in an example of an embodiment of a crane device of the present invention.

FIG. 2 is a front view showing an example of a self-propelled main trolley of the crane device of the present invention.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 2;

FIG. 4 is a view in the direction of arrows IV-IV in FIG. 2;

FIG. 5 is a block diagram illustrating an example of a control circuit according to the present invention.

FIG. 6 is a conceptual diagram illustrating an example of a container crane.

FIG. 7 is a conceptual view of a traversing drive system of a main trolley and a catenary trolley in a conventional crane apparatus as viewed in perspective.

[Explanation of symbols]

 Reference Signs List 3 girder 4 boom 15a hoisting drum 15b another hoisting drum 16 hoisting rope 21 traverse drive 22 self-propelled main trolley 23 traverse drive 24 self-propelled catenary trolley 25 self-propelled catenary trolley 31 traverse position detector 32 position signal 34 control Sensors 35, 36 Traverse position detectors 37, 38 Position signals 39, 40, 41, 42 Proximity switches 43, 44, 45, 46 Position correction signals

Claims (2)

[Claims] 1. A main trolley capable of traversing a girder and a boom connected in a substantially horizontal manner, and a main trolley unwound from a hoisting drum and passed through a girder base end side and then passed through a boom tip end side to a main trolley again. A hoisting rope which is hung and further wound on another hoisting drum via a girder base end side, and a girder and a boom can be traversed at the girder base end side of the main trolley, and A first catenary trolley that supports a predetermined portion of the rope from below, and a first catenary trolley that is located at the boom tip side of the main trolley and that can traverse the girder and the boom and supports the predetermined portion of the hoisting rope from below. A catenary trolley and a self-propelled main trolley provided with a traverse drive device, and a self-propelled catenary trolley provided with a catenary trolley and a traverse drive device. Each of the traverse drive device of the traveling main trolley and the traverse drive device of the self-propelled catenary trolley is provided with a traverse position detector, and receives a position signal from each of the traverse position detectors to input the position signal from the self-propelled main trolley and the self-propelled catenary trolley. A crane device comprising a controller for controlling a traversing position. 2. A proximity switch for detecting a passage of a self-propelled main trolley and a self-propelled catenary trolley and outputting a position correction signal to a controller at an arbitrary position of the girder and the boom. The crane device according to 1.