JPS6313913B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a drive control device for a carrier that is driven by pushing and pulling while supporting a connecting member spanned between a plurality of points in a relative movement relationship.

Carriers of this type are used, for example, as part of the power supply system in cranes.

[Background of the invention]

As shown in FIGS. 1 and 2, the crane runs on wheels 5 with a trolley 3 supporting an operator's cab 4 on a main girder 1 and an elevating girder 2 forming the main body. In order to rotate the wheels 5, power is supplied from the main body to the motor 6 provided on the trolley 3, and the driver's cab 4
A covered electric wire 9 is passed between the driver's cab 4 and the rear end of the main girder 1, and the operation signal is supplied from the main body side to the hoisting device 8 and the elevating device 7 via the covered electric wire 9. .

The crane shown in Figures 1 and 2 is a cargo ship 10.
In order to unload the cargo 11 from the truck 12 onto the truck 12,
The hoist 13 is raised and lowered by the hoisting device 8, and the trolley 3 is run to take a cargo handling route as shown by arrow B.
Furthermore, during non-cargo handling, the elevating girder 2 is moved up around the pin 14 by the elevating device 7 so as not to hit the mast of the cargo ship 10 when the cargo ship 10 is berthed.

In this way, the trolley 3 travels and moves during cargo handling. Furthermore, when raising and raising the elevating girder 2, it is necessary to move the trolley 3 back toward the main girder 1 side, which accompanies the traveling movement of the trolley 3.

For this reason, the covered electric wire 9 is required to have a following movement function as the trolley 3 moves.

In order to achieve the following movement function of the covered electric wire 9,
Conventionally, a curtain cable type power supply means as shown in FIGS. 1 and 2 has been employed. This power supply means connects each girder 1, 2 with a guide rail 1 parallel to each girder 1, 2.
A large number of carriers 16, 17, 18, 19, 20, 21, 22,
23 and 24 are provided, and the covered electric wires 9 are supported by the carriers 16 to 24 at approximately equal intervals.

In this type of power feeding means, when the trolley 3 travels, each of the carriers 16 to 24 is also pushed and pulled by the trolley 3 and travels on the guide rail 15. If the traction force is small, the carriers 16 to 24 may be caused to follow the coated wire 9 by applying a traction force to the coated wire 9, but generally, in order to prevent damage to the coated wire 9, each carrier 15 to 24 is moved as shown in FIG. 23 are connected by a wire rope 25, and the traction force is transmitted to the wire rope 25. This wire rope 2
The length of the wire 5 is set to be shorter than the hanging interval of the covered wire 9 so that the traction force does not transfer to the covered wire 9.

Conventionally, the following running conditions of carriers 16 to 24 are as follows:
As shown in FIGS. 3 and 4. That is, when the trolley 3 travels in the direction of arrow C shown in FIG. 3, the trolley 3 is in a state of pushing each of the carriers 16 to 24. Further, when the trolley 3 travels in the direction of arrow D as shown in FIG. 4, the trolley 3 is in a state of towing each of the carriers 16 to 24.

If the traveling speed and acceleration/deceleration of trolley 3 are increased in order to improve the cargo handling efficiency of the crane,
In the case shown in the figure, the collision force of the trolley 3 against the carriers 16 to 24 becomes large, and each carrier 16 to 24
The disadvantage is that the collision force increases even between the two.
In addition, in the case of FIG. 4, the almost stationary carrier is rapidly pulled with a strong force, which causes strain on the wire rope 25, and the wire rope 25, which has been subjected to a strong tensile force, is pulled together with the covered electric wire 9. This causes a swaying phenomenon, resulting in the disadvantage that a contact accident between the wire rope 25 and the guide rail 15 is likely to occur. Furthermore, due to the inertial running of the carriers 16 to 24, a large number of carriers 16 to 2 are moved toward the trolley.
4 rear-end collisions occur one after another, and large rear-end collision forces occur between the carriers. These drawbacks are
This becomes noticeable as the relative speed difference between the trolley 3 and the carrier increases.

All of these drawbacks apply to carriers 16-2.
4 or wire rope 25 or carrier 16~
This may cause derailment of the wire 24 and damage to the covered wire 9.

In order to solve this problem, a technology was developed in which only a part of the carrier located in the middle part was made of a sliding type, and this sliding friction resistance weakened the inertial running force of the carrier and buffered the rear-end collision force. It is publicly known in the publication No.

However, according to this known technology, the trolley 3
Although it can be expected to have the effect of reducing collisions between the carriers due to the inertial running of the carriers that occurs immediately after the trolley 3 stops running, when the trolley 3 suddenly starts in the direction in which the wire rope 25 is stretched, the running friction of the sliding type carrier in the middle part The resistance acts to stop the carrier and has the opposite effect of increasing the relative speed difference.
This has the disadvantage that an impact tension is generated in the wire rope 25. Furthermore, even when pushing the carrier to loosen the coated wire 9, the sliding carrier is difficult to move due to running frictional resistance, resulting in a large rear-end impact force. Furthermore, it also has the disadvantage that maintenance of the sliding parts is troublesome.

[Purpose of the invention]

The main object of the present invention is to provide a smooth following motion to a carrier that supports and follows a member spanned between points in a relative movement relationship.

[Summary of the invention]

The present invention provides a first sheave and a second sheave at the rear end and the front end of the moving range of the moving body, respectively, a rope winding drum is provided on the front moving body, and the movement of the moving body causes the A rope winding drum is rotated at a predetermined reduction ratio, one end of the rope wound around the rope winding drum is passed through the first sheave and connected to the carrier, and the other end of the rope is connected to the second sheave. The sheave is passed through the sheave and connected to the carrier, so that the carrier in the middle follows the moving body at a predetermined reduction ratio.

[Embodiment of the Invention] The present invention will be explained below with reference to an embodiment shown in FIGS. 5 and 6.

In FIGS. 5 and 6, wire ropes 2
The carriers 16 to 24 run while connected by the main girder 1, and each carrier 16 to 24 supports the covered electric wire 9 between the rear end of the main girder 1 and the driver's cab 4, as in the conventional case.

Rope sheaves 43 and 44 are attached to the ends of the main girder 1 and the elevation girder 2. The trolley 3 is provided with a rope winding drum 40 and a gear reduction gear 41. The gear reducer 41 is driven by the shaft of the wheel 5 of the trolley 3 and rotates the rope winding drum 40. One end of the wire rope 42 wound around the winding drum 40 is reversed by a rope sheave 43 and fixed to the intermediate carrier 20. The other end of the wire rope 42 is inverted by a rope sheave 44 and fixed to the carrier 20. Trolley 3
is positioned at the tip of the elevating girder 2, the carrier 20 to which the wire rope 42 is fixed is 1/1/2 from the connection point between the covered wire 9 and the main girder 1 (rope sheave 44 side) with respect to the running path of the trolley 3. Located 2 distances apart. For this reason, the wire rope 4 consists of the reduction ratio of the gear reducer 41 and the diameter of the rope winding drum 40.
The feeding speed of trolley 2 is set to be 1/2 of the running speed of trolley 3.

In such a configuration, when the trolley 3 travels, the rope winding drum 40
is wound up at 1/2 the speed of trolley 3 on the other side,
That is, it is fed out in the opposite direction to the running direction of the trolley 3. Therefore, the intermediate carrier 20 is
will follow trolley 3 at 1/2 the speed of .

At this time, the intermediate carrier 20 is connected to each carrier 16 to 19 or 21 to 2 in front in the following direction.
Press 4 to accelerate, and each rear carrier 21~
24 or 16 to 19 to accelerate it.

Since both the pushing speed and the pulling speed are half the speed of the trolley 3, the pulling and rear-end impact forces are not large.
Moreover, since each of the carriers 16 to 24 starts to follow the trolley 3 from the moment it starts moving, the trolley 3
The relative speed difference between the carrier and each of the carriers 16 to 24 is small, and no large impact tensile force is generated on the wire rope 25 or the like. Further, since the intermediate carrier 20 is linked to the trolley 3 for both tracking and stopping, free running due to inertia does not occur. Therefore, each of the carriers 16 to 1 located before and after this intermediate carrier 20
Collision accidents do not occur between the 9th group and each of the carrier groups 21-24. Therefore, the rear-end collision phenomenon that occurs when the trolley 3 stops is prevented midway.

Note that one carrier group includes the intermediate carrier 20.
to rear-end. If it is desired to reduce the total amount of rear-end collision force, it is sufficient to cause another carrier to follow the trolley 3 using the reduction means of the predetermined reduction ratio of the above embodiment.

Instead of the gear reducer 41 as a deceleration means, a chain sprocket type power transmission means is used,
The reduction ratio may be set based on this sprocket ratio.

The above embodiment has been described as an example in which electric power energy is transmitted by the covered electric wire 9, but when it is desired to transmit hydraulic energy, the covered electric wire 9 is connected to the hydraulic hose.
When it is desired to transmit pneumatic energy, the covered electric wire 9 is replaced with a pneumatic hose.

〔Effect of the invention〕

As described above, the present invention causes the intermediate carrier to follow the moving body at a reduction ratio corresponding to its position, so that the relative speed difference between the moving body and the carrier is reduced, and the traction impact force becomes excessive. to prevent
Moreover, accurate follow-up motion of the carrier can be obtained. Furthermore, since the driving force for the intermediate carrier is obtained from the running wheels of the moving body, the configuration can be simplified.

[Brief explanation of the drawing]

Fig. 1 is an overall view of a container crane, Fig. 2 is a view taken along the arrow F-F in Fig. 1, Figs. 3 and 4 are carrier tracking state diagrams of conventional equipment, and Fig. 5 is an embodiment of the present invention. FIG. 6 is an enlarged side view of the main part of the trolley shown in FIG. 5. 1...Main girder, 2...Elevation girder, 3...Trolley,
4... Driver's cab, 5... Wheels, 6... Motor, 9
... Covered electric wire, 15 ... Guide rail, 16,1
7, 18, 19, 20, 21, 22, 23, 24
...Carrier, 40...Rope winding drum, 41
...Gear reducer, 43,44...Rope sheave,
42...Wire rope.

Claims (1)

[Claims] 1. A flexible connecting member is stretched between a movable body that is in a moving relationship relative to the main body and the main body at one end of the moving range of the movable body, and a plurality of parts are connected in the middle of the connecting member. In the communication device, the carrier is supported by a carrier, and the carrier is placed on a guide extending in the moving direction of the moving body, and a first sheave and a first sheave are provided at one end and the other end of the moving range of the moving body, respectively. a rope winding drum is provided on the movable body; one end of the rope wound around the rope winding drum is passed through the first sheave and connected to one of the carriers; The other end is passed through the second sheave and connected to a carrier connected to the rope, and the rope winding drum is provided to be driven by the wheels of the movable body as a power source, and the rope winding drum is provided with a drum drive device to wind up and pay out the rope at a speed of a predetermined reduction ratio relative to the moving speed of the moving body, and the predetermined reduction ratio positions the moving body at the other end of the moving range. A tracking control device for a carrier that follows a moving body, wherein the value is the distance from the carrier connected to the rope to one end of the moving range divided by the distance of the moving range of the moving body.