JPH0752147Y2 - Overhead crane connecting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an overhead crane connecting device for assisting a failed overhead crane.

[Prior Art] Generally, in the case where two or more overhead cranes travel on the same track provided on the ceiling of a building such as a factory,
A trolley provided with a hoist that lifts and lowers a load is provided in each crane so as to be traversable, and is configured to lift and lower the load at a separate work place in a factory.

When one of the two or more overhead cranes fails due to an electrical trouble or the like and cannot operate, a worker climbs to the overhead crane to repair the malfunction.

[Problems to be solved by the invention] However, in order to repair a defective overhead crane, workers are required to climb to a high place and perform repair work at a high place.
Not only is it dangerous, but it takes a lot of time and effort to repair it.
Therefore, until the repair of the broken overhead crane is completed,
There has been a problem that the moving range of other sound overhead cranes is limited, which impedes operations.

For this reason, it is desired to move a failed overhead crane to a location where it does not interfere with the operation of other overhead cranes.

In particular, if an overhead crane installed in a nuclear reactor facility in a radioactive atmosphere fails, it is difficult for workers to approach the overhead crane, so the failed overhead crane can be safely repaired without human intervention. Required to move to.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a connecting device for an overhead crane that can move a defective overhead crane to a place where it does not interfere with the operation of another overhead crane. It is in.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides one of two overhead cranes traveling on the same track, one overhead crane stopped on the track due to an electric system failure and the other overhead crane. The traveling brake is released and towed by the power supply from the overhead crane. That is, a hook that is rotatably provided toward the one overhead crane that has failed in the other overhead crane, a power supply terminal that is attached to the hook to rotate integrally, and that is provided in the other overhead crane. And an electric actuator for rotating the hook, a hook receiver provided on the one of the failed overhead cranes to detachably engage with the hook, and one of the power supply terminals movably provided on the overhead crane. The power receiving terminal for supplying the power from the power supplying terminal to the drive device for releasing the traveling brake by the connection of 1 and the guide means for correcting the eccentricity provided between the power supplying terminal and the power receiving terminal.

[Operation] When one of the overhead cranes stops on the track due to a failure of the electrical system, the hook with the power supply terminal is rotated by the operation of the electric actuator provided on the other of the overhead cranes, and the hook of the failed crane is rotated. Engaged with a bridge. At this time, the faulty crane is provided with a power receiving terminal connectable to the power feeding terminal, and the power feeding terminal and the power receiving terminal are connected at the same time when the hook and the hook receiver are connected. By connecting the power supply / power receiving terminals, electric power is supplied from the power supply terminal to the faulty crane side to release the traveling brake, and the faulty crane is towed by another crane in this state.

To move a defective overhead crane to a place where it does not interfere with operations, you can mechanically connect the defective crane to a healthy crane and pull it.However, if the electrical system of the overhead crane fails, the traveling brake automatically And get stuck in orbit. In the present invention, the broken crane can be smoothly towed with the traveling brake released.

[Embodiment] A preferred embodiment of the present invention will be described with reference to the drawings.

The overhead crane consists of two cranes 1, as shown in Fig. 7.
2 is the same track 3 installed on the ceiling of both side walls of factories, etc.
It is hung freely on the top.

Each of these cranes 1 and 2 travels on a track 3 at both ends thereof, and a traveling unit 6 having a traveling parking brake 10 and two cranes provided between the two traveling units 6. The girders 4 and 5, and the trolleys 7 and 8 provided on the girders 4 and 5 so as to traverse freely.

When the crane 1 breaks down and stops on the track 3, the crane 2 pulls the broken crane 1 and supplies power to the crane 2, so that the coupling device 12 according to the present embodiment includes the girder 4 of the crane 1 and the crane. It is detachably provided between the two girders 5.

As shown in FIG. 1, the connecting device 12 is provided on a side surface of the girder 5 of the crane 2 and has a hook 14 having a power supply terminal 16 rotatably supported toward the crane 1 and a girder of the crane 1. 4 is provided at a position opposite to the hook 14 and the hook receiver 15 detachably engages with the hook 14.
And a power receiving terminal 17 connected to the power feeding terminal 16 and supplied with electric power.

First, the hook 14 provided on the girder 5 of the crane 2
And the power supply terminal 16 will be described.

The hook 14 and the power supply terminal 16 are provided on a hook support member 23 detachably attached to the girder 5. Specifically, the hook support member 23 has a lot 26
An electrically driven cylinder 25 that expands and contracts is provided via a support member 24, and a link 28 is attached to the lower end of this lot 26 via a pin 27.

A hook member 30 is integrally attached to the link 28 via a rotating pin 29. The pivot pin 29 is rotatably provided on the support plate 32 of the hook support member 23. The hook member 30 is provided with the hook 14 and the power supply terminal 16 in parallel with the hook 14. Therefore, the hook 14 and the power supply terminal 16 are supported by the hook support member 23 so as to be freely rotated around the rotation pin 29 toward the crane 1 as the cylinder 25 expands and contracts.

The hook 14 is formed with an engaging recess 22 for engaging the hook receiver 15 of the faulty crane 1, and is firmly formed so that the crane 1 can be towed when engaged.

The power supply terminal 16 provided on the hook member 30 has a second
As shown in the figure, 12 power supply terminals 33 are provided on the upper surface thereof, and these power supply terminals 33 are connected to a power supply through two power supply cables 34. In order to securely connect the power supply terminal 16 and the power receiving terminal 17 of the crane 1, one end of the power supplying terminal 16 is provided with a guide bar 46 projecting toward the power receiving terminal 17, and the other end side. Is a guide hole for guiding and connecting the guide bar of the power receiving terminal 17.
47 are provided.

The hook support member 23 is adapted to be detachably attached to the girder 5 of the crane 2 by being suspended by another crane, for example.

Therefore, as shown in FIG. 1, a position setting pin hole 19 is formed in the upper end portion of the girder 5, and a bracket 35 having a mounting pin 21 is provided on the side surface of the girder 5 facing the crane 1. Has been. A position setting pin 18 that engages with the position setting pin hole 19 is provided on the upper end of the hook support member 23 so as to project downward, and the lower part of the hook support member 23 is suspended. A guide groove 36 is formed which engages with and guides the mounting pin 21 when it is attached to and detached from the girder 5.

A lock member 38 for locking the engagement between the mounting pin 21 and the guide groove 36 is a lock pin 39 provided on the hook support member 23.
It is rotatably provided via.

The lower end of the lock bar 40 is attached to the opposite end of the lock pin 39 of the lock member 38, and the upper end of the lock bar 40 is locked to one end of the engaging member 41 at the upper end of the hook support member 23. Has been done. The other end of the engaging member 41 has an engaging pin 42.
It is engaged with the hook support member 23 via. Engaging member
In 41, a hanging part 43 is formed which is hung by another crane.

Therefore, when the hook support member 23 is hung from another crane and moved in order to attach the hook support member 23 to the girder 5, the support member 23 is moved by its own weight around the engagement pin 42. Tilted from 41, rock bar 40
Will be raised. Therefore, the lock member 38 is rotated around the lock pin 39 and is opened so as to engage with the attachment pin 21.

Then, when the hook support member 23 is hung, the guide groove 36 at the lower portion of the member 23 is guided by the mounting pin 21, and the position setting pin 18 is engaged with the position setting pin hole 19 of the girder 5 to set the position. It Here, when the support member 23 is further suspended, the engagement member 41 tilts downward about the engagement pin 42 and the lock bar 40 is pulled down. At the same time, the lock member 38 is rotated around the lock pin 39, engaged with the guide pin 21, and the hook support member 23 is fixedly attached to the girder 5.

In this embodiment, the existing crane 2 is attached to the hook support member 23.
The hook support member 23 may be fixed to the girder 5 in advance when a crane is newly installed.

Next, of the coupling device 12, the girder 4 of the failed crane 1
Now, the hook receiver 15 and the power receiving terminal 17 provided in the above will be described.

As shown in FIGS. 1 and 3 to 5, the hook receiver 15 and the power receiving terminal 17 are attached to the hook 14 provided on the girder 5 of the crane 2 and the power feeding terminal 16 so as to be detachable. It is provided integrally with the receiving and supporting member 50.

The hook receiving and supporting member 50 is provided on the girder 4 of the crane 1 provided at a position facing the hook supporting member 23 of the crane 2.
It is detachably attached to the mounting bracket 51 of. The hook receiving and supporting member 50 is, like the hook supporting member 23 that is attached to and detached from the crane 2, suspended by, for example, another crane or the like, and is attached to or detached from the mounting bracket 51 of the crane 1.

The mounting bracket 51 is formed so as to project on the side surface of the girder 4 facing the girder 5, and the mounting member 54 of the hook receiving and supporting member 50 is mounted on the upper surface of the mounting bracket 51 by an appropriate mounting means. A hook receiver 15 is formed downward at the outer end of the hook receiver supporting member 50 facing the crane 2. The lower end of the hook receiver 15 is engaged with the engaging recess 22 of the hook 14 rotated from the crane 2.

The hook receiving and supporting member 50 is provided with a power receiving terminal 17 connected downward to the power feeding terminal 16 rotated from the crane 2 via the vertical position correcting means 73.

As shown in the figure, two power receiving cables 56 for supplying electric power to a predetermined driving device of the crane 1 are connected to the power receiving terminal 17, and the lower end surface of the power receiving terminal 33 of the power feeding terminal 16 of the crane 2 is connected to the power receiving terminal 33. The same number of power receiving terminals 55 are provided.

The power receiving terminal 17 is provided with a guide hole 59 that guides the guide bar 46 provided so as to project from one end side of the power supply terminal 16 and engages them, and a guide bar 60 is provided on the other end side. It is provided so as to project, and is engaged with the guide hole 47 of the power supply terminal 16.
The power supply terminal 33 of the crane 2 and the power receiving terminal 55 of the crane 1 are securely connected by engaging the guide holes 6, 60 with the guide holes 47, 59 while being guided.

This power receiving terminal 17 corrects the eccentricity in the vertical direction and the horizontal direction caused by the displacement of the positions between the cranes 1 and 2 and the bending of the girders 4 and 5 when the power receiving terminal 16 is connected. Is allowed.

Specifically, as shown in the figure, the upper portion of the power receiving terminal 17,
A T-shaped receiving member 62 whose upper part is extended in the left-right direction is formed. The receiving member 62 is engaged with and supported by the receiving plate 63 of the mounting member 65. The receiving plate 63 has an edge portion 64 for supporting the receiving member 62, is formed so as to open inward in a U-shaped cross section, and the receiving member 62 is supported by the receiving plate 63 while being left and right. The gap d is slidable in the direction. Therefore, when the power feeding terminal 16 is attached to or detached from the power receiving terminal 17, if there is eccentricity in the left-right direction,
By the engagement of the guide holes 47, 59 with the guide holes 46, 60, the receiving member 62 slides and moves in the receiving plate 63 according to the amount of eccentricity, and follows the eccentricity.

Further, the power receiving terminal 17 is provided with a centering means 66.
The decentering means 66 has a U-shaped cross section provided by opening from the mounting member 65 toward both side surfaces in the longitudinal direction of the power receiving terminal 17.
One fixing member 67 and two spring supporting members 74 formed so as to project from both side surfaces of the power receiving terminal 17 in the longitudinal direction. A spherical body 68, which is pressed outward by an internally provided spring, is brought into contact with the left and right inner surfaces of the fixing member 67 on the spring supporting member 74. Therefore, when the power feeding terminal 16 is attached to the power receiving terminal 17, the rescue work of the crane 1 ends when the receiving member 62 moves from the receiving plate 63 following the eccentricity generated between them. When the terminals 16 and 17 are separated, the centering means 66 returns the power receiving terminal 17 to the position before the eccentric movement.

By the way, between the hook receiving and supporting member 50 and the power receiving terminal 17, there is provided a vertical position correcting means 73 which allows a vertical position shift when the power feeding terminal 16 is attached to or detached from the power receiving terminal 17. . As shown in FIG. 1, the correction means 73 includes a bracket 69 that is engaged with a mounting member 65 above the power receiving terminal 17.
A guide main shaft 71 having a coil spring 72 interposed is provided between the guide main shaft 71 and the upper surface of the hook receiving and supporting member 50.
Four guide shafts 70 are slidably provided in the vertical direction on the outside. Therefore, the power supply terminal 16 is connected to the power receiving terminal 17
The vertical position correction means 73 allows a vertical positional deviation between the two when they are attached and detached.

Next, the operation of the above configuration will be described.

The crane 1 stops due to a failure of the electrical system, etc., along with which the traveling parking brake 10 is automatically applied, and the track 3
You will be stuck on top.

Since this broken crane 1 interferes with the operation of other cranes, in order to move it to a place where it can be repaired and to unload the suspended load in a hurry, the crane 2 to which the hook support member 23 is attached in advance is installed in the crane 1. It is run toward and the rescue work of power feeding and towing is performed.

First, the crane 2 travels to a predetermined position near the crane 1. Then, as shown in FIG. 6, the electric cylinder 25
Is driven to extend the lot 26 in the direction of the arrow in the figure. By the extension of the lot 26, the hook member 30 formed integrally with the link 28 is rotated around the rotation pin 29 toward the hook receiving member 50 of the crane 1 in the arrow direction in the figure.

The engaging recess 22 of the hook 14 on the crane 2 side is engaged with the lower end of the hook receiver 15 on the crane 1 side, and the power supply terminal 16 is also connected to the power reception terminal 17.

When connecting the power feeding terminal 16 and the power receiving terminal 17, the guide bars 46 and 60, which are alternately provided at both ends of these terminals, are positioned while being engaged with the guide holes 47 and 60 of the mating side.

When eccentricity in the left-right direction occurs between the power feeding terminal 16 and the power receiving terminal 17 due to displacement or bending between the girders 4 and 5, the guide bars 46 and 60 and the guide holes 47 and 60 on the mating side are formed. The receiving member 62 formed on the upper portion of the power receiving terminal 17 slides in the receiving plate 63 by the external force caused by the contact with the contact plate 63, the eccentricity is corrected within the gap d, and the positions are aligned and connected. Crane 1
When the power saving terminal 16 is disengaged from the power receiving terminal 17 after the rescue work is completed, the power receiving terminal 17 is returned to the original position by the centering means 66.

On the other hand, when the power supply terminal 16 and the power receiving terminal 17 are misaligned in the vertical direction, the vertical position correction means 73 allows the misalignment and these are connected. When the power supply terminal 16 is disconnected from the power receiving terminal 17 after completion of this connection, the coil spring 72 of the vertical position correcting means 73 returns the power receiving terminal 17 to the original position.

In this way, the hook 14 of the crane 2 and the hook receiver 15 of the failed crane 1 are connected, and the crane 1 is towed to a place to be repaired by the crane 2. here,
The power feeding terminal 16 of the crane 2 is connected to the power receiving terminal 17 of the crane 1, and the power from the power feeding cable 34 is fed to the power feeding terminal 33.
Power is transmitted to a predetermined driving device of the crane 1 from the power receiving terminal 55 or through the power receiving cable 56. As a result, the traveling brake of the crane 1 is released and the crane 1
Is smoothly towed.

In addition, the power being transmitted to the crane 1 side allows the suspended load to be unloaded on the ground at an appropriate position.

When the rescue work of the broken crane 1 is completed, the hook 14 and the power feeding terminal 16 of the crane 2 are separated from the hook receiver 15 and the power receiving terminal 17 of the crane 1 by the operation opposite to the above.

[Effects of the Invention] According to the present invention, the following excellent effects are exhibited.

(1) The hook receiver provided on one overhead crane stopped on the track due to a failure of the electrical system is engaged with the hook provided on the other healthy overhead crane by rotation, and at the same time, provided between both overhead cranes. By connecting the power supply terminal and power receiving terminal to supply power from a sound overhead crane to the failed overhead crane and release the traveling brake, the failed overhead crane can be smoothly moved to a place where it does not interfere with the operation. Can be towed.

(2) Since the power receiving terminal is movably provided on the above-mentioned faulty overhead crane and the guide means for correcting the eccentricity between the power receiving terminal and the power feeding terminal is provided, the relative displacement between the power feeding and the power receiving terminal is allowed. These connection states can be maintained well.

(3) Since the hook and the electric actuator are provided on the above-mentioned sound overhead crane, the electric actuator can be easily turned on and operated to connect the overhead cranes.

(4) Since the overhead crane can be connected by the operation of the electric actuator, remote operation becomes possible, which is effective for use in nuclear reactor equipment in a radioactive atmosphere.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment according to the present invention, FIG. 2 is a front view of a power supply terminal of FIG. 1, FIG. 3 is a front view of a power receiving terminal of FIG. 1, and FIG. A bottom view, FIG. 5 is a side view of a power receiving terminal, FIG. 6 is an operation explanatory view of an embodiment, and FIG. 7 is an overall view of an overhead crane. In the figure, 1 and 2 are overhead cranes, 14 is a hook, 15 is a hook receiver, 16 is a power feeding terminal, and 17 is a power receiving terminal.

Claims (1)

[Scope of utility model registration request] 1. A ceiling for pulling one of the two overhead cranes traveling on the same track on an orbit due to a failure of an electric system by releasing the traveling brake and pulling the other overhead crane. In the crane coupling device, a hook rotatably provided to one ceiling crane that has failed in the other overhead crane, a power supply terminal that is attached to the hook and integrally rotates, and the other of the above An electric actuator provided on the overhead crane for rotating the hook, a hook receiver provided on the one of the failed overhead cranes that is detachably engaged with the hook, and movably provided on the one overhead crane. And a power receiving terminal that supplies the power from the power feeding terminal to the drive device that releases the traveling brake by connecting the power feeding terminal to the power feeding terminal. Provided between the terminal connection device of an overhead crane, characterized in that a guide means for correcting these eccentric.