JPH10194668A - Release system for ceiling crane collision prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically release a collision prevention device by means of a sample structure requiring no release switch. SOLUTION: This device is provided with the first alarm circuit part (17, 18, 19), in which a solenoid relay 18 is provided in an alarm push button circuit (17, 19), for the operation carried out by means of a pendant or a wireless device, the second alarm circuit part (17, 18, 19), which is arranged in an alarm switch circuit (alarm foot switch circuit) (17, 19) and provided with a solenoid relay 18, for the operation carried out on a machine, a collision prevention circuit part (20, 3, 14), in which a contact 20 for the relay 18 is connected in series to detection circuits (3, 14) for a collision prevention device, and travel circuit parts (4, 15, 5, 12) by which the collision prevention devices 3, 14 are released when the contact 20 for the solenoid relay 18 is opened and a ceiling crane can be run.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a release system for an overhead crane collision prevention device.

[0002]

2. Description of the Related Art FIG. 4 is a diagram showing the configuration of a conventional release system of this type. This release system releases an overhead crane collision prevention device that prevents a traveling overhead crane from colliding.

In FIG. 4, a release switch 21 operated to release the overhead crane collision prevention device is attached to a control panel A on the crane via a cable a. If there is no spare line in the cable a, the release switch 21 is directly attached to the control panel A. Alternatively, the release switch 21 is mounted in the on-board cab.

In order to perform a remote operation, a pendant box P is connected to a control panel A via a cable a from above the machine, or a wireless device (not shown) is used instead of the pendant box P which performs on-machine operation. Operation is performed. The pendant box P is provided with a release switch P6 for releasing the collision prevention device. When there is no release switch P6 in the pendant box P, the release switch is attached to the control panel A.

As described above, the pendant box P includes a device for performing on-machine operation and a wireless device for performing wireless operation. In the case of wireless operation, when there is no spare for one channel, the wireless device is attached to the control panel A. .

[0006]

When the release switch is mounted on the pendant box as in the above-described conventional configuration, the pendant box moves up and down with the movement of the crane, which is inconvenient in operation. In addition, according to the conventional method, if the operator forgets to turn off the collision prevention device while keeping the release switch on,
Since the anti-collision device remains released, there is a risk of the crane colliding.

An object of the present invention is to provide a release system for an overhead crane collision prevention device that automatically releases the collision prevention device with a simple configuration that does not require a release switch for releasing the collision prevention device. is there.

[0008]

Means for Solving the Problems To solve the above problems and achieve the object, a release system for an overhead crane collision prevention device of the present invention is configured as follows. The release system for an overhead crane collision prevention device of the present invention is a release system for an overhead crane collision prevention device that releases an overhead crane collision prevention device that prevents a traveling overhead crane from colliding, and is operated by a pendant or a wireless device. A first alarm circuit unit provided with an electromagnetic relay in an alarm push button circuit, and a second alarm circuit provided in an alarm switch circuit provided in an operator's cab and provided with an electromagnetic relay when operating on the machine. Part, a collision prevention circuit unit in which the contacts of the respective electromagnetic relays are connected in series to a detection circuit of the collision prevention device, and the collision prevention device is released by opening the contacts of the respective electromagnetic relays, whereby the ceiling is released. And a traveling circuit unit that allows the crane to travel.

[0009] As a result of taking the above measures, the following effects occur. In the overhead crane collision prevention device release system of the present invention, the on-board operation, the pendant / wireless operation allows the crane to travel, and when the crane approaches another crane, the collision prevention device operates, and the first The alarm circuit or the second alarm circuit operates. That is, a predetermined collision prevention alarm lamp is turned on, and a predetermined collision alarm buzzer is sounded for a time set by a predetermined timer, so that the crane stops and it is no longer possible to approach the other crane. As a release operation, when the alarm push button is turned on, the collision prevention device is automatically released while a predetermined alarm siren is sounding, and the crane can be made to approach the other crane.

By using the alarm siren in this manner, the release push button switch conventionally required for releasing the collision prevention device is not required, and the electric wire and the cable wired to the release push button switch are eliminated. No wires are required. In the case of wireless operation, one channel which has been conventionally required to release the collision prevention device is not required. That is, even when the number of channels is insufficient, the present invention can easily configure the release system.

[0011]

FIG. 1 is a view showing the configuration of a release system for an overhead crane traveling collision prevention device according to an embodiment of the present invention. In FIG. 1, the same parts as those in FIG. 4 are denoted by the same reference numerals. As shown in FIG. 1, a control panel A installed on a crane body (not shown) includes an electromagnetic contactor (M
SF) 2, electromagnetic contactor (MSB) 13, electromagnetic relay (R
YBZ) 18, electromagnetic relay (RYF) 4, electromagnetic relay (RYB) 15, collision alarm buzzer release timer (T) 9
Is provided.

Further, a pendant box P, a collision prevention alarm lamp (PL) 7,
The collision alarm buzzer (AL2) 8, the F collision prevention device 3, the B collision prevention device 14, and the alarm siren (AL1) 19 are connected. In the pendant box P, an upper switch P1 for traveling the crane upward, a lower switch P2 for traveling the crane downward, an F traveling switch P3 for traveling the F direction, and a traveling switch B for the B direction. And a warning switch P5 for generating a warning.

FIG. 2 is a simplified diagram showing a configuration of an internal circuit of a control unit in the traveling collision prevention device according to the present embodiment. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals. The configuration of the internal circuit of this control unit is such that when the F traveling contact (open at normal time) 1 (P3) is closed, the electromagnetic contactor (MSF) 2 is energized, and the crane body travels in the F direction. At that time, when the crane approaches an adjacent crane on the same traveling rail, the F-line collision prevention device 3 operates. For this reason, the electromagnetic relay (RYF) 4 is energized. When the electromagnetic relay (RYF) 4 is energized to open the auxiliary contact 5 (normally closed), the electromagnetic contactor 2 is deenergized, and the traveling of the crane in the F direction is stopped.

At the same time that the electromagnetic contactor (RYF) 4 is energized, the auxiliary contact 6 of the electromagnetic relay (RYF) 4 (normally,
Since (open) is closed, the collision prevention alarm lamp (PL) 7 is turned on, and the collision alarm buzzer (AL2) 8 sounds. As a result, the auxiliary contact 10 (closed at normal times) of the collision alarm buzzer release timer (T) 9 opens, and the sounding of the collision alarm buzzer 8 stops.

When an operation necessary for bringing the crane stopped by the operation of the F-collision prevention device 3 closer to an adjacent crane occurs, an alarm contact (normally open) 1
7 (P5), the electromagnetic relay (RYBZ) 1
8 is energized and the alarm siren (AL1) 19 sounds.
At the same time, the auxiliary contact 20 of the electromagnetic contactor (RYBZ) 18
Since the (normally closed) is opened, the electromagnetic contactor 4 is deenergized and the electromagnetic contactor 2 is energized, so that the crane can travel in the F direction. As for the operation in the B direction, reference numeral 1 denotes 11 (P4), 2 denotes 13, 3 denotes 14, 4
Is set to 15, 5 to 12, and 6 to 16, and the F direction is read as the B direction.

FIG. 3 is a flowchart showing an operation procedure of an internal circuit of a control unit (not shown) in the control panel A in the above-mentioned traveling collision prevention device. First, in step S1, the operator operates the F travel switch P3 of the pendant box P. If it is determined in step S2 that the F travel switch P3 is ON, then in step S3, the F-row collision prevention device 3 is turned on.
Is operating, the collision prevention alarm lamp (PL) 7 is turned on in step S7. Then, in step S8, the time set by the collision alarm buzzer release timer (T) 9;
The collision alarm buzzer (AL2) 8 sounds.

Next, in step S9, the operator operates the alarm switch P5. In step S10, when the alarm siren (AL1) 19 is sounding, if the F travel switch P3 is ON, the crane operates in the F direction in step S15, and if the B travel switch is ON, step S16. Moves the crane in the B direction. If the alarm siren (AL1) 19 is not sounding in step S10 and the F traveling switch P3 is ON, the crane moving in the F direction is stopped in step S11 and the B row switch P4 is ON. If there is, the crane moving in the direction B is stopped in step S12. Thereafter, the operation from step S1 is performed.

If the F travel switch P3 is OFF in step S2, the operator operates the B travel switch P4 of the pendant box P in step S4. Then, in step S5, the B travel switch P4 is turned off.
If the result is F, the operation after step S1 is performed. When the B-traveling switch P4 is ON, if the B-row collision prevention device 14 is operating in step S6, the operation after step S7 is performed.

If the F-row collision preventing device 13 is not operating in step S3 and the B-row collision preventing device 14 is not operating in step S6, a collision prevention alarm lamp (PL) is set in step S13. 7 is turned off, and a collision warning buzzer (AL2) 8 is set in step S14.
To OFF. If the F travel switch P3 is ON, the crane is operated in the F direction in step S15, and if the B travel switch P4 is ON, step S1 is executed.
At 6, the crane is operated in the B direction. Thereafter, the operation from step S1 is performed.

It should be noted that the present invention is not limited to only the above-described embodiment, and can be implemented with appropriate modifications without departing from the scope of the invention. (Summary of Embodiment) The configuration, operation and effect shown in the embodiment are summarized as follows.

The release system for an overhead crane collision prevention device shown in the embodiment is a release system for an overhead crane collision prevention device for releasing an overhead crane collision prevention device for preventing a traveling overhead crane from colliding, When an operation is performed with a pendant (P) or a wireless device (not shown), a first alarm circuit unit (17, 18, 1) including an alarm push button circuit (17, 19) and an electromagnetic relay (18).
9) and when operating on the machine, an alarm switch circuit (alarm foot switch circuit) in the cab (17, 19)
A second alarm circuit unit (17, 18, 19) provided with an electromagnetic relay (18) provided in each of the electromagnetic relays (18);
Contact (20) is connected to the detection circuit (3, 1) of the collision prevention device.
4) The anti-collision circuit section (20,
3, 14) and the contacts (2) of the respective electromagnetic relays (18).
The traveling circuit units (4, 15, 5, 12) that allow the overhead traveling crane to travel when the collision prevention device (3, 14) is released by opening the 0).

As described above, in the overhead crane collision prevention device release system, the on-board operation, the pendant / wireless operation allows the crane to travel, and the collision prevention device operates when the crane approaches another crane. The first alarm circuit section or the second alarm circuit section operates. That is, a predetermined collision prevention alarm lamp is turned on, and a predetermined collision alarm buzzer is sounded for a time set by a predetermined timer, so that the crane stops and it is no longer possible to approach the other crane. As a release operation, when the alarm push button is turned on, the collision prevention device is automatically released while a predetermined alarm siren is sounding, and the crane can be made to approach the other crane.

By using the alarm siren as described above, the release push button switch conventionally required for releasing the collision prevention device is not required, and the electric wire and the cable wired to the release push button switch are eliminated. No wires are required. In the case of wireless operation, one channel which has been conventionally required to release the collision prevention device is not required. That is, even when the number of channels is insufficient, the present invention can easily configure the release system.

[0024]

According to the present invention, it is possible to provide a release system for an overhead crane collision prevention device that automatically releases the collision prevention device with a simple configuration that does not require a release switch for releasing the collision prevention device. . That is, by using a warning circuit to generate an alarm (siren) to release the collision prevention device, the collision prevention device can be automatically released. INDUSTRIAL APPLICABILITY The present invention is applicable to an operation that requires approaching a plurality of cranes.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a release system for an overhead crane traveling collision prevention device according to an embodiment of the present invention.

FIG. 2 is a diagram schematically showing a configuration of an internal circuit of a control unit in the traveling collision prevention device according to the embodiment of the present invention.

FIG. 3 is a flowchart showing an operation procedure of an internal circuit of a control unit in the traveling collision prevention device according to the embodiment of the present invention.

FIG. 4 is a view showing a configuration of a release system for an overhead crane traveling collision prevention device according to a conventional example.

[Explanation of symbols]

 A ... Control panel P ... Pendant box a ... Cable 1 ... F running contact 2 ... Electromagnetic contactor (MSF) 3 ... F line collision prevention device 4 ... Electromagnetic relay (RYF) 5 ... Auxiliary contact 6 ... Auxiliary contact 7 ... Collision prevention Alarm lamp (PL) 8 ... Collision alarm buzzer (AL2) 9 ... Collision alarm buzzer release timer (T) 10 ... Auxiliary contact 11 ... B traveling contact 12 ... Auxiliary contact 13 ... Electromagnetic contactor (MSB) 14 ... B line collision prevention Device 15 ... Electromagnetic relay (RYB) 16 ... Auxiliary contact 17 ... Alarm contact 18 ... Electromagnetic relay (RYBZ) 19 ... Alarm siren (AL1) 20 ... Auxiliary contact 21 ... Auxiliary contact 22 ... Auxiliary contact

Claims (1)

[Claims] 1. An overhead crane collision prevention device release system for releasing an overhead crane collision prevention device for preventing a traveling overhead crane from colliding, and an alarm push button circuit when an operation is performed with a pendant or a wireless device. A first alarm circuit unit provided with an electromagnetic relay; a second alarm circuit unit provided with an electromagnetic relay provided in an alarm switch circuit in a cab when operating on the machine; A collision prevention circuit unit having a contact connected in series to a detection circuit of the collision prevention device; and a traveling circuit for releasing the collision prevention device and opening the overhead crane by opening a contact of each of the electromagnetic relays. A release system for an overhead crane anti-collision device, comprising: