JPH0511275Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a power supply cable guide device for a crane.

(Prior Art) A power supply cable used in an overhead mobile crane such as a hoist crane is suspended from a trolley in a telescopic state because it needs to follow the movement of the crane. The number of trolleys installed increases as the cable length increases as the distance traveled by the crane increases.
In order to increase the movement speed of the crane, it was necessary to make the rollers stored in the trolley body larger.
Due to reasons such as the increase in the size of the trolley body, securing storage space for the trolley has become a problem. In order to increase this storage space, conventionally the proximal end of the cable rail that movably suspends and supports the trolley is curved toward the cable proximal end to increase the length of the rail, and the crane's running rail Generally, a trolley for suspending and supporting a power supply cable is housed on the base end side of a cable rail that is perpendicular to the cable rail. An example of a device in which a power supply cable is movable using a trolley is disclosed in Japanese Utility Model Application Publication No. 153668/1983.

(Problem to be solved by the invention) However, when the radius of curvature of the curved part of the cable rail is small, when the trolley stored on the base end side of the curved part of the cable rail is pulled out when the crane moves, However, since the problem of the trolley getting caught at the curved portion occurs, the radius of curvature cannot be made very small, and there are restrictions on increasing the storage space for the trolley.

In addition, when the conventional power supply cable is pulled out from the carrier of the cable, that is, the trolley, the distance between each trolley is widened from the crane side.
Since a large component force is generated in the pulling force of the trolley, the trolley does not follow the pulling direction, making it difficult to pull out the trolley, and causing problems such as damage to the trolley if pulled forcibly.

The present invention has been developed in view of the above-mentioned conventional problems, and when a cable trolley suspended and supported on a cable rail is pulled toward a crane, as shown in FIG.
This is to avoid the problem of the trolley getting caught on the rail by increasing the angle θ1 (for example, 22 degrees) when the adjacent trolleys are spread to positions A and C. That is, among the trolleys that are stored closer to the base end of the cable than the curved part of the cable rail, at least the trolley that moves through the curved part by the movement of the crane is provided with a magnet, and the magnet directly connects adjacent trolleys. By adsorbing the trolleys and maintaining them at positions A and B where they are directly connected even in the curved part, and by keeping the angle θ2 of the component of the tensile force small (for example, 9 degrees), the trolleys can pass through the curved part as in the past. This is an attempt to resolve the problems that arise when doing so.

(Means for Solving the Problems) The means of the present invention for solving the above problems is such that the crane main body is movably suspended and supported on a running rail, and the crane body is movably suspended and supported between the base end and the tip end of the running rail. This applies to cranes that are designed to travel and move. and a power supply cable whose base end is connected to a fixed part provided on the base end side of the running rail and whose tip end is connected to the crane main body, and a power supply cable arranged along the running rail and connected to the base end of the running rail. A cable rail having a curved portion curved toward the base end of the cable on the side thereof, and a plurality of trolleys each of which is movably suspended and supported by the cable rail and supports the cable at predetermined intervals. and,
A connecting member that can be bent and deformed is provided to connect the trolleys with a length shorter than the cable length between the trolleys. Furthermore, among the trolleys stored on the cable proximal end side of the curved portion of the cable rail, at least the trolley that moves the curved portion by movement of the crane main body is provided, and the trolley moves the curved portion. A magnet is provided to magnetically attract the adjacent trolleys so that the adjacent trolleys are directly connected to each other and moved toward the tip side of the cable rail.

(Function) The effect of the above means is that when the crane moves forward and the power supply cable is pulled toward the crane, each trolley on the crane side moves on the cable rail at a predetermined interval defined by the connecting member. and move. On the other hand, even if the trolleys on the curved part side that move along the curved part of the cable rail are pulled due to the movement of the crane, they maintain a direct connection state due to the attraction force of the magnet and hold the curved part at a small force angle. After passing smoothly, when the pulling force of the trolley becomes greater than the attraction force of the magnet, each trolley separates in turn and moves to the crane side. Therefore, the trolley can move without getting caught on the curved portion of the cable rail.

(Embodiment) An embodiment in which a power supply cable guide device for a crane according to the present invention is installed in an overhead crane will be described below with reference to FIGS. 1 to 8.

The power supply cable guide device CG mainly includes a power supply means 2 disposed on a crane 1 installed on the ceiling, and a magnet 3 attached to the power supply means 2.

As shown in FIGS. 1 and 2, the crane 1 has a crane main body 1b movably suspended and supported via rollers on two traveling rails 1a, 1a arranged in parallel on the ceiling. ing. The crane body 1b is equipped with a vertical motor 1c that moves the crane body 1b in parallel with the running rail 1a, a traverse motor 1d that moves the crane body 1b in the horizontal direction, and a hoist 1e that suspends cargo. It is suspended and supported.

The power supply means 2, as shown in detail in FIGS. 3 to 8, supplies power to operate the crane 1, and includes a cable rail 2a, a trolley 2b, a power supply cable 2e, a connecting member 2f, etc. It is equipped with The cable rail 2a is arranged in parallel along the traveling rail 1a for the crane main body 1b, and is fixed to the traveling rail 1a by a plurality of rail support fittings 2c provided at predetermined intervals. Base end side L of traveling rail 1a
(on the left side of FIGS. 1 and 2), a curved portion 2d is formed that curves with a predetermined radius of curvature toward the proximal end of the cable 2e, which will be described later, so that a trolley 2b, which will be described later, can be stored. There is. Trolley 2b
The power supply cable 2e and the connecting member 2f, which can be bent and deformed such as a wire or chain, are suspended and supported in a flexible manner, and as shown in FIGS. 3 to 5, the cable rail 2a is The trolley base 2g is movably suspended and supported via running rollers and meandering prevention rollers. A hanging tool 2j is fixed to the lower part of the trolley base 2g, and a semicircular cable support fitting 2h is fixed to the hanging tool 2j via a bolt. The cable support fitting 2h holds a power supply cable 2e whose base end is connected to a power source and whose distal end is connected to the crane body 1b. Further, hanging holes 2k are provided on both sides of the hanging tool 2j, and the hanging holes 2k are provided on both sides of the hanging tool 2j.
K is a connecting member 2f that can be bent and deformed, such as a chain.
Each end of the trolley 2b is hooked, and each trolley 2b is connected by a length shorter than the length of the cable 2e between the trolleys 2b, so that when the cable 2e is stretched, it is regulated at a predetermined interval. . Note that the connecting member 2f is not limited to a chain, and may be a member such as a wire or a rope that can be bent and deformed and is strong in tensile force.

The magnet 3, as shown in FIGS. 3 to 8,
The trolley 2b (including the one located on the curved part 2d when the crane body 1b is stopped) is made of a permanent magnet with S and N poles and moves along the curved part 2d of the cable rail 2a as the crane body 1b moves. It is adsorbed in a directly connected state. Each of the S-pole and N-pole magnets 3a, 3b is rotatably attached in a horizontal plane via a pin to a hinge 2i protruding from both ends of the trolley 2b in the moving direction.
(see figure), curved portion 2 of the cable rail 2a
d, as shown in FIG. 7, the magnet 3
Each trolley 2b can be easily attached to each other by a, 3b.
can be moved while directly connected. The magnets 3a and 3b are attached to the trolley 2b on the curved portion 2d side of the cable rail 2a,
The trolley 2b stored from the curved portion 2d side toward the base end L of the cable rail 2a is provided with only an N or S pole magnet 3a or 3b,
Trolley 2 from the curved part 2d side toward the tip side R
b (see FIGS. 3 and 8), and the configuration is such that the direct connection between the trolleys 2b is strengthened only when the trolley 2b moves to the curved portion 2d. That is, in this example, the curved portion 2
In order to strengthen the magnet of trolley 2b located at d,
While two ferromagnetic magnets 3a and 3b are provided,
In order to weaken the magnetic force on the proximal side L, only one piece is used.
Furthermore, in order to reduce the attraction force, spacers, films, etc. are installed between the magnets 3b and 3a, and between the end of the trolley 2b and the magnet 3a.
It is designed to be interposed in between. In this example, the magnets 3 are attached to each trolley 2b on the curved portion side 2d, but the magnets 3a and 3b may be arranged at several intervals and the trolleys 2b may be directly connected in groups.

Next, the operation of this embodiment will be explained.

The crane main body 1b is set in advance on the traveling rails 1a, 1.
The cable rail 2a is stopped at the proximal end L of the cable rail 2a, and the power feeding means 2 is housed at the proximal end L of the cable rail 2a.

The crane body 1 is connected to the power supply cable 2e.
When the longitudinal motor 1c at the crane body 1b is energized and driven forward, the crane body 1b travels forward and moves to the right in FIG.

When the cable 2e of the power supply means 2 is pulled to the right due to the movement of the crane body 1b, each trolley 2b on the crane body 1b side is connected to the connecting member 2.
Move while leaving an interval regulated by the length of f,
The cables 2e are sequentially extended.

When the trolleys 2b near the curved portion 2d of the cable rail 2a are pulled, each trolley 2b having the magnets 3 moves toward the tip side R while maintaining the directly connected state due to the attraction force of the magnets 3. At this time, the magnet 3 of each trolley 2b is attached to the curved portion 2 with the pin of the hinge 2i provided on the trolley 2b as the center.
It rotates along the tangential direction of the circular arc d, passes each trolley 2b at the positions shown in A and C in Fig. 9, and suppresses the component angle of the tensile force to a small angle θ2 (for example, 9 degrees). to ensure smooth passage. Therefore, the trolley 2b moves without being pulled by the curved portion 2d.

As the crane body 1b moves toward the tip side R and the cable 2e is stretched, the curved portion 2
The trolley 2b that has passed through the cable 2b receives a tensile force, and the magnets 3a and 3b are separated from each other, and the direct connection of the trolley 2b is released, and the cable 2
Expand e sequentially.

When the longitudinal motor 1c of the crane body 1b is driven backward to return to the base end L of the traveling rail 1a, each trolley 2b is directly connected in sequence by magnets 3a and 3b, and is suspended and supported with the cable 2e hanging down. While doing so, it is stored on the base end side L of the cable rail 2a.

(Advantages of the Invention) According to this invention, the trolleys that suspend and support the power supply cable and move along the curved section of the cable rail as the main body moves are attracted to each other in a directly connected state by magnets, which avoids the problem of the trolley getting caught when passing through the curved section, making it easier to stretch the cable, and eliminating problems such as damage to the trolley. In addition, the radius of curvature of the curved section of the cable rail can be made smaller, making it possible to reduce the space required to accommodate the trolley.

[Brief explanation of the drawing]

1 to 8 show an embodiment of the present invention, FIG. 1 is a plan view showing the entire crane, FIG. 2 is a side view of the crane main body and power supply cable guide device,
Fig. 3 is a perspective view showing the power feeding means held on the curved part of the cable rail, Fig. 4 is a side view showing the main parts of the trolley, Fig. 5 is a front view thereof, and Fig. 6 is the main body of the trolley. Fig. 7 is a plan view showing the trolley directly connected, Fig. 8 is a side view showing the arrangement of the trolley base and magnets, and Fig. 9 is a view of the cable rail. It is a figure explaining the tensile state of the trolley in a curved part. 1...Crane, 1a...Traveling rail, 1b...
... Crane body, 2 ... Power supply means, 2a ... Cable rail, 2b ... Trolley, 2d ... Curved part, 2e ... Power supply cable, 2f ... Connection member, 3 ... Magnet, 3a ... Magnet , 3b... magnet,
CG...Power cable guide device.

Claims (1)

[Scope of Claim for Utility Model Registration] A crane in which the crane body is movably suspended and supported on a running rail and travels between the base end and the tip end of the travel rail, wherein the base end travels as described above. a power supply cable that is connected to a fixed part provided on the base end side of the rail and whose tip end is connected to the crane body; a cable rail having a curved portion curved toward the cable rail; a plurality of trolleys each movably suspended from the cable rail and supporting the cables at predetermined intervals; A connecting member that can be bent and deformed to connect the trolleys with a length shorter than the cable length, and at least one of the trolleys stored on the cable proximal end side from the curved part of the cable rail, which is suitable for movement of the crane main body. Therefore, the trolley is provided on the trolley that moves on the curved section, and when the trolley moves on the curved section, the adjacent trolleys are moved toward the tip side of the cable rail in a state where the adjacent trolleys are directly connected to each other. A power supply cable guide device for a crane, characterized in that it is equipped with a magnet for magnetic attraction.