JPH075101Y2 - Shaft coupling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a shaft coupling device, and more particularly to a shaft coupling device for transmitting a driving force for rescue to a hoist having a failure in an overhead crane.

[Prior Art] Generally, an overhead crane is known that travels on a track provided on a ceiling of a building such as a factory and transfers a load. In the case where two or more overhead cranes travel on the same track, a trolley equipped with a hoist that lifts and lowers the load is provided in each crane so that it can be traversed at different work locations in the factory. , Is configured to lift and lower loads.

The trolleys and hoisting machines of these overhead cranes are controlled and driven by their respective drive sources.

[Problems to be Solved by the Invention] In the above-mentioned overhead crane, when the hoisting machine of the overhead crane breaks down for some reason during the lifting and lowering of the load and the operation is stopped, the overhead crane is not repaired. , It is necessary to unload the load suspended by the hoist from the ground. However, since the crane is installed on the ceiling, a worker must perform repair work at a high place, which requires a lot of time and effort to repair the crane. Moreover, when the hoisting brake is manually opened and closed to unload the load, there is a danger.

In particular, for example, if the hoisting machine of an overhead crane installed in a nuclear reactor facility in a radioactive atmosphere breaks down, it is difficult for workers to approach the overhead crane. There was a need for a means of transmitting the driving force for relief.

The present invention has been made to solve the above problems, and its purpose is to transmit driving force by connecting another overhead crane when the hoist of one overhead crane fails. In order to provide a shaft coupling device for driving a failed hoisting machine.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a hoist mounted on a trolley of one overhead crane traveling on the same track, and an input shaft for externally driving the hoist. A drive shaft that is detachably engaged with the input shaft is eccentrically provided on the trolley of the other overhead crane, and a coupling that allows the eccentricity of the drive shaft and a spring that absorbs axial movement. It is configured by connecting a driving machine via a member.

[Operation] When the hoisting machine installed on the trolley of one overhead crane fails, the other overhead crane is moved toward the input shaft of this hoisting machine and the drive shaft of this overhead crane is approached. , Contacted.

Since the drive shaft is eccentrically provided and a coupling that allows the eccentricity is provided, the drive shaft is pressed by the spring member so that the drive shaft is aligned with the input shaft. The eccentricity is moved so that the axes are aligned.

The drive shaft is rotationally driven in a state where the shaft centers are aligned, and the drive shaft and the input shaft are engaged by the pressing force of the spring member.

Then, the driving machine is driven, and this driving force is transmitted from the driving machine to the input shaft via the shaft coupling device. The hoisting machine of the overhead crane, which has stopped due to the drive of the input shaft, is driven,
The load that is suspended from this hoisting machine is unloaded to the ground.

In this way, even if the input shaft of one overhead crane and the drive shaft of the other overhead crane are eccentric, this is allowed,
It can be attached and detached with a simple operation.

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

As shown in FIG. 2, the two overhead cranes 1 and 2 are respectively hung on the same track 3 provided on the ceilings of both side walls of a factory or the like, and are freely movable by a drive device (not shown). .

The overhead crane 1 is a crane for transferring loads normally,
When the overhead crane 1 fails, the overhead crane 2 unloads the load to the ground in a hurry, so that the driving force is transmitted to the crane 1 via the shaft coupling device 11 according to the present embodiment. It is a crane.

Each of these overhead cranes 1 and 2 has a traveling part 5 formed on both ends thereof and traveling on the track 3, and two girders 6 provided between the two traveling parts 5, The trolley is provided on the two girders 6 so as to be able to traverse.

The trolley 8 of the overhead crane 1 includes a drive device (not shown) for laterally driving the trolley, a hoisting machine 13 for hoisting and hoisting a load, and a hoisting motor 14 for rotationally driving the hoisting machine 13. A hoisting speed reducer 15 interposed between the hoisting motor 14 and the hoisting machine 13 is provided. An input shaft 20 of the shaft coupling device 11 is connected to the hoisting speed reducer 15 so as to receive the driving force from the overhead crane 2.

The trolley 9 of the overhead crane 2 includes a drive device (not shown) for laterally driving the trolley, a drive machine 17 for activating a drive force transmitted to the overhead crane 1, and the drive machine 17
A drive speed reducer 18 connected to is provided. A drive shaft 21 of the shaft coupling device 11 is connected to the drive reducer 18 in order to transmit the drive force of the drive device 17 to the overhead crane 1. The overhead crane 2 is shown as a crane for transmitting the driving force to the overhead crane 1.

As shown in FIG. 1, the shaft coupling device 11 according to the present embodiment includes a drive reducer for an input shaft 20 connected to a hoisting reducer 15 of a trolley 8 of an overhead crane 1 and a trolley 9 of an overhead crane 2. A drive shaft 21 connected to 18 is eccentrically and detachably engaged.

The input shaft 20 connected to the hoisting speed reducer 15 of the trolley 8
Is provided so as to project toward the drive shaft 21 connected to the drive reducer 18 of the trolley 9 with an appropriate length, and its tip end portion
19 is formed in a tapered shape. On the outer circumference of this input shaft 20,
A spline 44 having an appropriate shape is formed toward the tip portion 19 over a predetermined length. An end buffer 16 for preventing a collision is provided on the traveling unit 5 of each overhead crane.

Further, the drive shaft 21 connected to the drive speed reducer 18, an eccentric support member 27 that eccentrically supports the drive shaft 21, and a moving shaft portion connected to the drive shaft 21 via a coupling 26. 24 and the speed reducer 18 engaged with the moving shaft portion 24 by the key 23.
The output shaft 22 and the spring member 25 interposed between the moving shaft portion 24 and the output shaft 22 are provided.

Specifically, the input shaft 20 is retracted and engaged with the drive shaft 21, and the rotational driving force is transmitted from the drive shaft 21 to the input shaft 20. A spline 45 having a shape that meshes with the spline 44 formed on the outer periphery is formed. The opening 32 of the drive shaft 21 is enlarged so that the tip portion 19 of the input shaft 20 can be easily received.

An eccentric support member 27 is provided on the outer periphery of the drive shaft 21.

The eccentric support member 27 is fixed to the bearing portion 29 engaged with the outer periphery of the drive shaft 21 and the support member 28 on the trolley 9,
It is composed of a cylindrical body 30 surrounding the outer periphery of the bearing portion 29, and a plurality of elastic members 31 that elastically support the bearing portion 29 in the cylindrical body 30 via rods and coil springs. The drive shaft 21 is axially movable and rotatable by the eccentric support member 27,
Further, it is supported so as to allow eccentricity with the input shaft 20.

A coupling 26 is provided between the drive shaft 21 and the moving shaft portion 24. This coupling allows the eccentricity of the input shaft 20 and the drive shaft 21 to be eccentric and transmits the rotational force,
The coupling 26 is not limited to the illustrated coupling, but may be a known gear coupling, for example.

The coupling 26 in this embodiment is shown in FIGS.
As shown in the figure, mainly between the flange portion 33 formed at the end portion of the drive shaft 21 and the flange portion 34 formed at the end portion of the moving shaft portion 24, via the engagement plate 37, These flange parts 3
3,34 are eccentrically engaged.

The engaging plate 37 is provided with two long hole portions 38, 38 which are cut out by a predetermined length in opposite directions from the axis, and the long hole portions 38, 3
Two elongated hole portions 39, 39 that are also cut out in the radial direction that is 90 degrees out of phase with the radial direction of 8 are formed.

Further, the flange portion 33 of the drive shaft 21 is provided with two roller-shaped protrusions 35, 35 at positions opposed to each other in the radial direction,
The protrusions 35, 35 are slidably engaged with the elongated holes 38, 38 of the engagement plate 37. Further, the flange portion 34 of the moving shaft portion 24 is also provided with two roller-shaped projections 36 at radially opposite positions, and is slidably engaged with the long hole portions 39, 39 of the engagement plate 37. It's

Therefore, the eccentric movement of the drive shaft 21 is performed by the protrusion 35 on the side of the engagement shaft 29 sliding in the elongated hole 38 of the engagement plate 37 in the eccentric direction.

The moving shaft portion 24 is engaged with the output shaft 22 of the drive reduction gear 18 via the key 23 so as to be slidable in the axial direction by a predetermined distance.

A spring member 25 is provided between the moving shaft 24 and the output shaft 22. This spring member 25 is driven when the drive shaft 21 is pressed in the axial direction by this external force when the drive shaft 21 is brought into contact with the input shaft 20 in a state where the phases do not match, and the drive shaft 21 is moved along the key 23. Absorbs the axial movement of the shaft 21. A cover 40 is provided on the spring member 25.

Since the drive shaft 21 is configured as described above, the drive reducer 18
The driving force from the output shaft 22 moves through the key 23
Is transmitted to the drive shaft 21 from the moving shaft portion 24 via the coupling 26.

Next, the operation of this embodiment will be described.

For some reason, the crane 1
If the hoisting machine 13 on the trolley 8 fails, this hoisting machine 13
Stops with the load suspended. Therefore, when lowering the load to the ground, the hoisting machine 13 that is stopped is first driven. The driving force of the ceiling crane 2 on the rescue side for driving the hoisting machine 13 is transmitted through the shaft coupling device 11 of the present embodiment.
It is transmitted to the hoisting machine 13.

The overhead crane 2 travels and is brought close to the stopped overhead crane 1 by remote control from the ground.

Further, the drive shaft 21 connected to the drive speed reducer 18 of the rescue-side overhead crane 2 approaches and contacts the input shaft 20 connected to the hoist reducer 15 of the hoisting machine 13 of the overhead crane 1. .
When the input shaft 20 and the drive shaft 21 are brought into contact with each other in the same phase, the two shafts 20 and 21 are engaged with each other.
However, when the shafts 20 and 21 are brought into contact with each other in a state where their phases are not coincident with each other, the tip end portion 19 of the input shaft 20 is brought into contact with the inner wall of the opening 32 of the drive shaft 21, and these two shafts 20 and 21 are The drive shaft 21 is axially pressed without being engaged.

When the two shafts 20 and 21 are pressed in a state where they are out of phase with each other, the drive shaft 21 and the moving shaft portion 24 connected through the coupling 26 maintain the elasticity of the spring member 25. Meanwhile, it is moved in the axial direction via the key 23.

Due to this pressing force, the protrusion 35 provided on the flange portion 33 of the drive shaft 21 causes the elongated hole portion 38 of the engaging plate 37 engaged with the protrusion portion 35.
Is slid in a direction in which the axes of the drive shaft 21 and the input shaft 20 are aligned with each other, and the drive shaft 21 is moved. For example, as shown in the arrow A direction in FIG. 3, the horizontal movement of the protrusion 35 causes the protrusion 35 to move.
The horizontal movement of the slot 38 of the engaging plate 37 and the vertical movement of the projection 35 with the slot 35 of the engaging plate 37 as shown by the arrow B direction.

Further, when the projection 35 is moved in an oblique direction in the figure, only the projection 35 is moved, the engagement plate 37 is rotated together with the movement of the projection 35, and the eccentric movement of the projection 35 is allowed. Therefore, the eccentric movement of the drive shaft 21 in any direction is allowed by the coupling 26.

The eccentric movement of the drive shaft 21 is supported by the elastic member 31 of the eccentric support member 27 provided on the outer periphery of the drive shaft 21.

Therefore, the phases of the input shaft 20 and the drive shaft 21 do not match,
From the state where the tip portion 19 of the input shaft 20 is partially in contact with the inner wall of the opening 32 of the drive shaft 21, the drive shaft 21 acts so as to eccentrically move so as to be in phase with the input shaft 20, Is allowed by the eccentric engagement member 27 and the coupling 26. Then, the axes of the input shaft 20 and the drive shaft 21 are aligned, and these shafts 20, 2
The splines 44 and 45 respectively formed on the 9 are brought into contact with each other.

At this time, if the two splines 44, 45 do not mesh,
The drive machine 17 of the trolley 9 is slightly driven, and the drive shaft 21 is slightly rotated. By this rotation, the splines 44 and 45 of the input shaft 20 and the drive shaft 21 are brought into alignment with each other. When the splines mesh with each other, the drive shaft 21, which is in contact with the input shaft 20 while maintaining the pressing force, is inserted into the input shaft 20 by a predetermined length and the engagement is completed.

After the input shaft 20 and the drive shaft 21 are engaged, the driving machine 17 of the trolley 9 is driven. This driving force is transmitted from the drive shaft 21 to the input shaft 20 of the overhead crane 1 via the drive speed reducer 18, and the failed hoisting machine 15 is driven via the hoist speed reducer. By the drive of the hoisting machine 15, the load that was in the suspended state is unloaded to the ground.

After that, the overhead crane 2 travels away from the overhead crane 1, and the drive shaft 21 of the overhead crane 1 is disengaged from the input shaft 20 of the overhead crane 2.

[Advantages of the Invention] Since the present invention is as described above, even if the input shaft and the drive shaft for transmitting the driving force from one overhead crane to the other overhead crane are eccentric, this is allowed, and it is simple. It has an excellent effect that it can be engaged and disengaged by the operation and the load of the broken hoisting machine can be laid on the ground.

[Brief description of drawings]

FIG. 1 is a sectional view of a shaft coupling device according to the present invention, FIG. 2 is a plan view of an overhead crane equipped with the shaft coupling device according to the present invention, and FIG. 3 is a view taken along the line III-III of FIG. is there. In the figure, 1 and 2 are overhead cranes, 3 are tracks, 8 and 9 are trolleys, 13 is a hoisting machine, 17 is a drive machine, 20 is an input shaft, 21 is a drive shaft, 25 is a spring member, and 26 is a coupling. , 27 are eccentric support members.

Claims (1)

[Scope of utility model registration request] 1. A hoist mounted on a trolley of one overhead crane traveling on the same track is provided with an input shaft for externally driving the hoist, and the trolley of the other overhead crane is attached to and detached from the input shaft. A shaft that is eccentrically provided with a drive shaft that is freely engaged, and a drive machine is connected to the drive shaft through a coupling that allows the eccentricity and a spring member that absorbs axial movement. Coupling device.