JP4219209B2 - Cable guide device for spreader in gantry crane - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cable guide device that draws and winds a cable for supplying power to a spreader supported in a gantry crane so as to be movable up and down from a traversing carriage .
[0002]
[Prior art]
For example, in Patent Document 1, a cylindrical basket is erected on a head block (hanging tool), a frustum-shaped guide member that can be raised and lowered is provided in the basket, and the guide member is attached upward in the basket. A coil spring that is energized is disclosed, and during normal elevation, the guide member is positioned at the upper limit in the basket to guide the cable, and the guide block is brought into contact with the trolley at the upper limit of the head block. It is comprised so that it may descend. Therefore, in normal times, by positioning the guide port of the guide member at the upper position, the cable can be smoothly guided into the basket, and the lifting stroke of the head block can be expanded.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-163584 CD-ROM (FIG. 1)
[0004]
[Problems to be solved by the invention]
However, when the cable is subjected to strong winds, the cable may come off from the guide port of the guide member, protrude outward, and descend, and an accident may occur in which the disconnected cable is caught by another member and broken.
[0005]
An object of the present invention is to provide a cable guide device for a spreader in a gantry crane that solves the above-described problems and can prevent the cable from falling off the cable housing member.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention is directed to a spreader that is supported by a lifting device so as to be movable up and down from a traversing carriage, and a frustoconical guide frame that is provided on the spreader and has a cable guide port formed at the top. A cable guide device for a spreader in a gantry crane, comprising a cable housing member having a body and configured to house a cable suspended from a traversing carriage on a spreader in a guide frame body through a cable guide port, Around the cable guide opening of the guide frame body, a contact type ring-type cable detector that detects the cable by the weight of the cable protruding outside, or a contactless contact type ring sensor that detects the presence or absence of the cable protruding outside, is provided. When the cable detector detects a cable overhang in the driver's cab, The warning means is provided, the controller informing said the cable protrusion of is detected by the cable detection unit temporarily stops the rise of the spreader by manipulating the lifting device, then the cable detector detects protrusion of the cable The spreader is lowered until it disappears, and the spreader is raised again to provide an automatic guide mechanism that eliminates the protrusion of the cable.
[0007]
According to the above arrangement, the cable is fueled by strong winds when protrudes outside of the guide frame from the cable guide opening, which was detected by a contact or non-contact type ring cable detector due to the weight of the cable, the driver In addition to notifying the cable of the cable, the automatic guide mechanism of the controller can automatically stop and raise and lower the spreader to eliminate the cable from the cable guide port. Therefore, it is possible to prevent the cable from hanging down from the cable housing member, and it is possible to automatically prevent an accident that the cable is caught by other members and cut.
[0008]
According to a second aspect of the present invention, in the configuration according to the first aspect, the operator's cab is provided with a manual lifting switch for visually confirming the protrusion of the cable and stopping and lifting the spreader. When the number of repetitions reaches a predetermined number of times, the automatic guide mechanism is turned off, the notification means is operated, and the manual lift switch is operated.
[0009]
According to the above arrangement, the cable is fueled by strong wind detected by the cable detection unit from protruding outwardly from the cable guide opening, and then, is notified to more driver notification means, the driver manually By operating, the cable can be prevented from protruding and can be returned to the normal lifting operation. In addition, even if the overrun elimination operation is performed by the automatic guide mechanism, if the overrun elimination operation is repeated a predetermined number of times or more, the notification means is activated by the controller to notify the driver, the operation is switched to manual operation, and the manual lift switch is used. The protrusion of the cable can be eliminated.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Here, an embodiment of a cable guide device for a spreader in a gantry crane according to the present invention will be described with reference to the drawings.
[0011]
As shown in FIGS. 4 and 5, this gantry crane 1 is used to hang and transport heavy containers C in a container yard such as a wharf, and to transfer and stack them. a pair of right and left lower frame 2 with the group 2a, a pair of portal frame 3 before and after spanned gate-shape between the lower frame 2, freely traverse platform car travels on these gantry frame 3 in the lateral direction 4, the spreads da 6 capable of holding the container C by the gripper 7 is suspended vertically movably provided at the four corners by lifting device 5 from transverse carriage 4, and a cab 8 which is provided on the transverse carriage 4 It has.
[0012]
A power supply cable 10 with a winding hook is suspended from the traverse carriage 4 and connected to the spreader 6, and a cable storage member 11 for winding and storing the excess cable 10 on the main beam of the spreader device 6 is provided. Is provided. As shown in FIG. 1, the cable housing member 11 includes a cylindrical cable basket 12 disposed at a lower portion, and a truncated cone-shaped guide disposed on the cable basket 12 and having a cable guide port 13a formed at the top. The frame body 13 and a cone-shaped cone guide body 14 that guides the cable 10 installed in the cable basket 11 and having curled hooks to the outer peripheral side are configured.
[0013]
The cable guide device 21 according to the present invention is provided on the outer periphery of the cable housing member 11 and the cable guide port 13a of the guide frame 13, and when the cable 10 protrudes outside the cable guide port 13a, for example, the cable 10 A ring-shaped cable detector 22 that detects protrusion by weight, and one or both of a warning buzzer 24 and a warning lamp 25 that are notification means of the cab 8 based on the detection signal of the cable detector 22 are activated and moved up and down. The controller 5 includes a controller 26 having an automatic guide mechanism that controls the winch motor 5a for raising and lowering the device 5 to automatically eliminate the protrusion of the cable 10. The cable detector 22 may be a contactless detector such as a magnetic sensor as long as the cable can be reliably detected at the outer periphery of the cable guide port 13a. The driver's seat is provided with an automatic elevating switch 27 for raising and lowering the spreader 6 and a manual elevating switch 28 for turning off the automatic guide mechanism and eliminating the protrusion of the cable 10 by manual operation.
[0014]
In the above-described configuration, the traversing cart 4 is traversed from the cab 8 and the spreader 6 is moved up and down to land the spreader 6 on the container C, and the gripper 7 holds the container C. When the raising command is output by the automatic or manual elevating switches 27 and 28, the winch motor 5a is driven, the spreader 6 is raised by the elevating device 5, and the container C is raised.
[0015]
While the spreader 6 is being lifted, the cable 10 suspended from the traversing carriage 5 is wound around the cone guide body 14 from the cable guide port 13a into the cable housing member 11 using a winding rod. At this time, when the cable 10 is blown by a strong wind and protrudes from the cable guide port 13a, if the spreader 6 is lifted as it is, the cable is not stored in the cable storage member 11, but protrudes outward and hangs down. However, when the cable detector 22 detects the cable 10 protruding from the cable guide port 13a by the cable guide device 21, the warning buzzer 24 and / or the warning lamp 25 in the cab 8 is operated by the controller 26 to operate the cable. The person is warned that the cable 10 protrudes.
[0016]
In the case of manual operation, the driver operates the manual switch 28 to stop the spreader 6 and visually confirms the protrusion of the cable 10, and then descends the spreader 6 to eliminate the protrusion of the cable 10. By causing the cable 6 to rise again, the cable 10 can be prevented from drooping.
[0017]
In the case of an automatic operation in which the automatic guide mechanism is turned on, the winch motor 5a is automatically operated by the controller 26 to raise and lower the spreader 6, and the protrusion of the cable 10 is eliminated to prevent the drooping.
[0018]
That is, as shown in FIG. 3, when the raising command is output from the controller 26 to the winch motor 5a (STEP 1), the winch motor 5a is driven in the winding direction (STEP 2). When the cable detector 22 detects the protrusion of the cable 10 (STEP 3), the winch motor 5a is stopped (STEP 4). Next, the winch motor 5a is driven in the feeding direction to lower the spreader 6 (STEP 5). When the cable detector 22 does not detect the protrusion of the cable 10 (STEP 6), the winch motor 5a is temporarily stopped (STEP 7). Further, the winch motor 5a is again driven in the winding direction (STEP 2). Then, when the spreader 6 reaches the rising limit or the height of the command value (STEP 8), the winch motor 5a is stopped (STEP 9).
[0019]
In the above configuration, when the operation of eliminating the protrusion of the cable 10 is repeated a predetermined number of times or more, the automatic guide mechanism is automatically turned off, and the driver is notified by the warning buzzer 24 and the warning lamp 25 to switch to manual operation. It can also be configured as follows.
[0020]
According to the above-described embodiment, particularly when the cable 10 is blown by strong wind and protrudes outward from the cable guide port 13a while the spreader 6 is being lifted, this is detected by the cable detector 22, and the warning buzzer 24 or warning Since the driver is notified by the lamp 25, the driver immediately stops the spreader 6 and confirms the protrusion of the cable 10, and then the protrusion of the cable 10 is eliminated by lowering the spreader 6, and the spreader 6 It is possible to return to a normal lifting operation by raising again.
[0021]
Also, the spreader 6 can be lifted and lowered automatically by the automatic guide mechanism of the controller 26, so that the cable 10 can be prevented from sticking out. It is possible to automatically prevent accidents such as being disconnected.
[0022]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the cable is subjected to strong wind and protrudes from the cable guide port to the outside of the guide frame body, it is contacted or non-contacted ring-shaped depending on the weight of the cable. This is detected by the cable detector, and the driver is notified of the cable protruding, and the automatic guide mechanism of the controller can automatically stop and lift the spreader to eliminate the cable protruding from the cable guide port. Therefore, it is possible to prevent the cable from hanging down from the cable housing member, and it is possible to automatically prevent an accident that the cable is caught by other members and cut.
[0023]
According to the second aspect of the invention, the cable is fueled by strong wind detected by the cable detection unit from protruding outwardly from the cable guide opening, and then, is notified to more driver notification means, operating The person can eliminate the protrusion of the cable by manual operation and return to the normal lifting operation. In addition, even if the overrun elimination operation is performed by the automatic guide mechanism, if the overrun elimination operation is repeated a predetermined number of times or more, the notification means is activated by the controller to notify the driver, the operation is switched to manual operation, and the manual lift switch is used. The protrusion of the cable can be eliminated.
[Brief description of the drawings]
FIG. 1 is a perspective view of a cable housing member showing an embodiment of a cable guide device according to the present invention.
FIG. 2 is a configuration diagram of the cable guide device.
FIG. 3 is a flowchart for explaining the operation of the automatic guide mechanism of the cable guide device.
FIG. 4 is a perspective view showing a crane provided with the cable guide device.
FIG. 5 is a front view showing a spreader of the cable guide device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Crane 3 Portal frame 4 Traverse cart 5 Lifting device 5a Winch motor 6 Spreader 7 Grip tool 8 Driver's cab 10 Cable 11 Cable accommodating member 12 Cable basket 13 Guide frame 13a Cable guide port 14 Cone guide 21 Cable guide 22 Cable Detector 24 Warning buzzer 25 Warning lamp 26 Controller 27 Automatic lift switch 28 Manual lift switch

Claims (2)

A spreader supported by a lifting device by a lifting device from a traversing carriage, and a cable housing member having a frustoconical guide frame body provided with a cable guide port at a top portion of the spreader; In the cable guide device of the spreader in the gantry crane configured to accommodate the cable suspended in the guide frame body through the cable guide port,
Around the cable guide opening of the guide frame body, a contact-type ring-shaped cable detector that detects a cable based on the weight of the cable protruding outward or a contactless contact type that detects the presence or absence of the cable protruding outward is provided. ,
When the cable detector detects an overflow of the cable in the cab, a warning means is provided to notify the driver of the extension of the cable,
When the cable detector detects that the cable has protruded, the controller operates the lifting device to temporarily stop the spreader from rising, and then lowers the spreader until the cable detector no longer detects cable protrusion. An apparatus for guiding a spreader cable in a gantry crane, characterized in that an automatic guide mechanism that lifts the spreader again to eliminate the protruding of the cable is provided. The operator's cab is provided with a manual lifting switch that visually checks for cable protrusion and stops and lifts the spreader.
Controller, the protrusion resolving the cable is repeated equal to or more than a predetermined number of times, the claims to operate the notification means to turn off the automatic guide mechanism, characterized by being configured to operate said manual lifting switch A cable guide device for a spreader in the gantry crane according to claim 1 .

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